Fuel tank helium detection tool

Abstract

The utility model discloses a fuel tank helium detection tool in the field of detection equipment, which comprises a joint main body, a fuel tank joint and a gas pipe joint, the fuel tank joint and the gas pipe joint are arranged on the joint main body and are communicated through a channel in the joint main body, one end of the fuel tank joint far away from the joint main body is provided with an ICV valve push rod, and the periphery of the fuel tank joint is sleeved with a sealing ring. The connector body is provided with a clamping mechanism used for clamping an oil filling pipe of an oil tank. According to the utility model, the oil tank joint and the gas pipe joint are arranged on the joint main body to connect the oil tank and the helium detection equipment, the oil tank joint is connected with the oil filling pipe of the oil tank in an inserting manner, the sealing ring is utilized to ensure the sealing performance, and the ICV valve ejector rod is utilized to ensure that the ICV valve is in an open state in the detection process; the clamping mechanism is used for ensuring the stable connection between the joint main body and the oil tank, so that the stable sealing connection between the oil tank joint and the oil filling pipe is realized, and the convenience of equipment installation and the efficiency and accuracy of oil tank sealing detection are improved.

Description

Technical Field

[0001] The utility model relates to the field of detection equipment, and in particular designs a helium detection tool for a fuel tank. Background Art

[0002] As the automobile market is updated, higher requirements are put forward for fuel tank product quality. After welding and assembly, the fuel tank needs to be tested for leak-proofness to ensure that there is no risk of leakage in the fuel tank assembly, thus ensuring the safety of consumers.

[0003] At present, helium testing is generally used to test the sealing of fuel tanks. The process of helium testing is to first evacuate the fuel tank into a vacuum state and then fill it with helium. Finally, the leakage of helium is identified by the sensor to determine whether the fuel tank is sealed properly.

[0004] Currently, the helium detection of fuel tanks mainly uses a refueling hose to connect the helium detection equipment and the fuel tank assembly. This method has the following problems: First, the assembly is cumbersome, and the hose needs to be fixed with a pipe clamp when connected to the fuel tank, which will affect the efficiency of the entire fuel tank sealing test and is not suitable for multi-sample testing; second, it is impossible to detect fuel tanks with ICV valves. This connection method cannot stably control the opening and closing state of the ICV valve when the gas passes, causing unstable air pressure in the tank, thereby causing the helium detection equipment to make an erroneous judgment. Utility Model Content

[0005] In order to overcome the above-mentioned shortcomings of the existing fuel tank helium detection method, the technical problem to be solved by the utility model is to provide a fuel tank helium detection tooling which can improve the detection efficiency.

[0006] The technical solution adopted by the utility model to solve its technical problems is:

[0007] The fuel tank helium detection tool comprises a joint body, and a fuel tank joint and an air pipe joint which are arranged on the joint body and connected through a channel in the joint body. An ICV valve push rod is arranged at one end of the fuel tank joint away from the joint body, a sealing ring is arranged on the outer sleeve of the fuel tank joint, and a clamping mechanism for clamping the filling pipe of the fuel tank is arranged on the joint body.

[0008] Furthermore, the air pipe joint is arranged on the top of the joint body, and the oil tank joint is arranged on the side of the joint body. The air pipe joint and the oil tank joint are both installed on the joint body through threaded connection.

[0009] Furthermore, both the air pipe joint and the fuel tank joint are provided with nut shoulders.

[0010] Furthermore, three sealing rings are arranged on the oil tank joint, two of which are located at an end of the oil tank joint away from the joint body, and the other is located at an end close to the joint body.

[0011] Furthermore, the clamping mechanism includes a left clamping plate and a right clamping plate respectively located on the left and right sides of the fuel tank joint, and the left clamping plate and the right clamping plate are both arranged on the joint body to be opened and closed by a spring, and the left clamping plate and the right clamping plate are provided with a snap on the outer wall of the refueling pipe under the action of the spring at one end close to the fuel tank joint.

[0012] Furthermore, the clamping mechanism also includes a left pressure plate and a right pressure plate respectively located outside the left clamping plate and the right clamping plate, and a left push rod and a right push rod are slidably arranged on the joint body and pass through its left and right sides and the left clamping plate and the right clamping plate, the two ends of the left push rod are respectively fixedly connected to the left pressure plate and the right clamping plate, and the two ends of the right push rod are respectively fixedly connected to the right pressure plate and the left clamping plate, and the spring is arranged between the left clamping plate and the left pressure plate, and between the right clamping plate and the right pressure plate.

[0013] Furthermore, the left push rod and the right push rod each include two, the left push rod is connected to the left pressure plate by screws, and the left push rod is connected to the right clamping plate by nuts; the right push rod is connected to the right pressure plate by screws, and the right push rod is connected to the left clamping plate by nuts.

[0014] Furthermore, the left pressure plate and the right pressure plate are respectively provided with clearance holes for the right push rod, the left push rod and the nut to pass through.

[0015] The beneficial effects of the utility model are as follows: the fuel tank and the helium detection equipment are connected by arranging the fuel tank joint and the air pipe joint on the joint body; the fuel tank joint is connected to the filling pipe of the fuel tank by plugging; a sealing ring is used to ensure the sealing; an ICV valve push rod is used to ensure that the ICV valve is always in a stably open state during the detection process; a clamping mechanism is used to ensure the stable connection between the joint body and the fuel tank, thereby achieving a stable sealed connection between the fuel tank joint and the filling pipe, improving the convenience of equipment installation and the detection efficiency, and avoiding the detection error caused by insufficient sealing of the filling pipe connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is an exploded view of the structure of the utility model;

[0017] Figure 2 It is a schematic diagram of the structure of the utility model;

[0018] Figure 3 It is a schematic diagram of the connection between the utility model and the fuel tank;

[0019] Figure 4 It is a schematic diagram of the connection between the utility model and the refueling pipe.

[0020] Marked in the figure are, 1-connector body, 2-fuel tank, 3a-left clamping plate, 3b-right clamping plate, 4-spring, 5a-left pressure plate, 5b-right pressure plate, 6a-left push rod, 6b-right push rod, 7-screw, 8-nut, 11-fuel tank connector, 12-air pipe connector, 13-ICV valve top rod, 14-sealing ring, 15-nut shaft shoulder, 21-fuel pipe, 31-bayonet, 51-allowance hole. DETAILED DESCRIPTION

[0021] The utility model is further described below in conjunction with the accompanying drawings.

[0022] It should be noted that if there are directional indication terms in the present invention, such as up, down, left, right, front, and back directions and orientation terms, they are for the purpose of facilitating the description of the relative position relationship between components, and are not for the absolute position of the related components or the position relationship between components. They are only used to explain the relative position relationship and movement of the components in a certain posture. If the specific posture changes, the directional indication will also change accordingly. If there are terms related to quantity in the present invention, such as "multiple", "multiple", "several", etc., they specifically refer to two or more.

[0023] like Figure 1-4 As shown, a fuel tank helium detection tool provided by the utility model includes a joint body 1, and a fuel tank joint 11 and a gas pipe joint 12 which are arranged on the joint body 1 and connected through a channel in the joint body 1. The end of the fuel tank joint 11 away from the joint body 1 is provided with an ICV valve push rod 13, and the outer sleeve of the fuel tank joint 11 is provided with a sealing ring 14. The joint body 1 is provided with a clamping mechanism for clamping the refueling pipe 21 of the fuel tank 2. Among them, the size of the fuel tank joint 11 should match the inner diameter of the refueling pipe 21 of the fuel tank 2 to be tested, ensuring that the fuel tank joint 11 can achieve sealed docking under the action of the sealing ring 14 when inserted into the refueling pipe 21. The ICV valve push rod 13 is a long rod, and its length ensures that the fuel tank joint 11 can push open the ICV valve inside the refueling pipe 21 when inserted into the refueling pipe 21. The function of the clamping mechanism is to fix the joint body 1 on the fuel tank 2.

[0024] The use process of the utility model is: firstly, the air pipe joint 12 is connected to the air pipe of the helium detection equipment, and then the fuel tank joint 11 is inserted into the filling pipe 21 to ensure that the two are sealed and connected, and the ICV valve push rod 13 pushes the ICV valve open, and then the clamping mechanism is used to clamp the joint body 1 on the filling pipe 21 to ensure that the fuel tank joint 11 does not separate from the filling pipe 21 during subsequent detection, and finally the helium detection equipment is started to evacuate the fuel tank 2, and then helium is injected into the fuel tank 2, and helium leakage detection is performed at the same time, thereby completing the fuel tank sealing detection work.

[0025] In order to facilitate the connection of helium detection, the air pipe joint 12 is arranged on the top of the joint body 1, and the fuel tank joint 11 is arranged on the side of the joint body 1, that is, the two are in a 90° relationship, which makes it easier to connect the refueling pipe 21 and the gas hose. In addition, in order to facilitate the production, the air pipe joint 12 and the fuel tank joint 11 are both installed on the joint body 1 through threaded connection, so that the three parts are separately processed and then assembled, which can simplify the processing difficulty of each part. In addition, for different fuel tanks 2, the inner diameter size of the refueling pipe 21 is different. Therefore, the sealing test of different types of fuel tanks 2 can be met by replacing the fuel tank joint 11 and the sealing ring 14. Furthermore, in order to facilitate the rotation of the fuel tank joint 11 and the air pipe joint 12, the air pipe joint 12 and the fuel tank joint 11 are provided with a nut shaft shoulder 15.

[0026] Since the sizes of the inner and outer sections of the fuel filling pipe 21 are different, in order to ensure the sealing effect, three sealing rings 14 are provided on the fuel tank joint 11, two of which are located at the end of the fuel tank joint 11 away from the joint body 1, and the other is located at the end close to the joint body 1. The three layers of sealing rings 14 can ensure the sealing reliability between the fuel tank joint 11 and the fuel filling pipe 21.

[0027] There can be a variety of structural forms for the clamping mechanism. The preferred solution provided by the utility model is that the clamping mechanism includes a left clamping plate 3a and a right clamping plate 3b respectively located on the left and right sides of the fuel tank joint 11. The left clamping plate 3a and the right clamping plate 3b are both arranged on the joint body 1 to be openable and closable by a spring 4. The left clamping plate 3a and the right clamping plate 3b are provided with a bayonet 31 at one end close to the fuel tank joint 11, which can be pressed on the outer wall of the fuel pipe 21 under the action of the spring 4. This structure is similar to the clamps commonly used in life. The left clamping plate 3a and the right clamping plate 3b are pressed on the outer wall of the fuel pipe 21 by the pressure of the spring 4. The bayonet 31 can be set to a semicircle with the same radius as the outer radius of the fuel pipe 21. After the left clamping plate 3a and the right clamping plate 3b are closed, the two bayonet 31 can be just clamped on the fuel pipe 21. In addition, a circle of flange is usually provided at the pipe mouth of the fuel pipe 21. After the left clamping plate 3a and the right clamping plate 3b are clamped, the bayonet 31 can be clamped on the inner side of the flange, thereby limiting the left clamping plate 3a and the right clamping plate 3b from detaching from the fuel pipe 21 outward, further improving the reliability of the connection between the joint body 1 and the fuel pipe 21.

[0028] Preferably, Figure 1 , Figure 2As shown, the orientation is determined by taking the surface where the oil tank connector 11 is located as the front surface and the surface where the air pipe connector 12 is located as the top surface, the clamping mechanism also includes a left pressure plate 5a and a right pressure plate 5b respectively located outside the left clamping plate 3a and the right clamping plate 3b, and a left push rod 6a and a right push rod 6b are slidably arranged on the connector body 1, which pass through the left and right sides thereof and the left clamping plate 3a and the right clamping plate 3b, the two ends of the left push rod 6a are respectively fixedly connected to the left pressure plate 5a and the right clamping plate 3b, and the two ends of the right push rod 6b are respectively fixedly connected to the right pressure plate 5b and the left clamping plate 3a, and the spring 4 is arranged between the left clamping plate 3a and the left pressure plate 5a, and between the right clamping plate 3b and the right pressure plate 5b. In the natural state, the elastic force of the spring 4 pushes the left clamping plate 3a and the right clamping plate 3b inward, and pushes the left pressure plate 5a and the right pressure plate 5b outward, that is, the left clamping plate 3a and the right clamping plate 3b are in a closed state and can be clamped on the refueling pipe 21; when the left pressure plate 5a and the right pressure plate 5b are pressed toward the middle at the same time by hand, the right clamping plate 3b moves to the right side under the action of the left push rod 6a, and at the same time, the left pressure plate 5a moves to the left side under the action of the right push rod 6b, so that the left pressure plate 5a and the right pressure plate 5b are opened. At this time, the fuel tank connector 11 can be inserted into the refueling pipe 21, and then the hand is released, and the left pressure plate 5a will be pressed against the refueling pipe 21 again under the action of the right push rod 6b under the action of the spring 4.

[0029] In order to improve the structural strength, the left push rod 6a and the right push rod 6b preferably include two respectively. In order to avoid interference, four through holes can be set on the four corners of the rectangle on the joint body 1, the left push rod 6a is set in two through holes on one of the diagonals, and the right push rod 6b is set in the other two through holes, so that the force balance can be ensured and the passage inside the joint body 1 can be avoided. In addition, in order to facilitate installation, a threaded hole can be set at one end of the left push rod 6a and the right push rod 6b, and an external thread can be set at the other end. The left push rod 6a is connected to the left pressure plate 5a by a screw 7, and the left push rod 6a is connected to the right clamping plate 3b by a nut 8. Similarly, the right push rod 6b is connected to the right pressure plate 5b by a screw 7, and the right push rod 6b is connected to the left clamping plate 3a by a nut 8. In this way, the distance between the pressure plate and the clamping plate can be controlled by rotating the nut 8, thereby controlling the opening size of the two clamping plates to adapt to different refueling pipes 21. In addition, in order to avoid interference, the left pressure plate 5a and the right pressure plate 5b are respectively provided with a clearance hole 51 for the right push rod 6b, the left push rod 6a and the nut 8 to pass through.

[0030] In summary, the utility model connects the fuel tank 2 and the helium detection equipment by arranging the fuel tank connector 11 and the air pipe connector 12 on the connector body 1; the fuel tank connector 11 is connected to the refueling pipe 21 of the fuel tank 2 by plugging; and a sealing ring 14 is used to ensure the sealing; an ICV valve push rod 13 is used to ensure that the ICV valve is in an open state during the detection process; a clamping mechanism is used to ensure the stable connection between the connector body 1 and the fuel tank 2, thereby achieving a stable sealed connection between the fuel tank connector 11 and the refueling pipe 21, improving the convenience of equipment installation and detection efficiency, avoiding detection errors caused by insufficient connection sealing of the refueling pipe 21, and having good practicality and application value.

Claims

1. Fuel tank helium detection tooling, characterized by: The invention comprises a joint body (1), and a fuel tank joint (11) and a gas pipe joint (12) which are arranged on the joint body (1) and are connected through a channel in the joint body (1); an ICV valve push rod (13) is arranged at one end of the fuel tank joint (11) away from the joint body (1); a sealing ring (14) is arranged on the outer periphery of the fuel tank joint (11); and a clamping mechanism for clamping a filling pipe (21) of a fuel tank (2) is arranged on the joint body (1).

2. The fuel tank helium detection tool as claimed in claim 1, characterized in that: The air pipe joint (12) is arranged on the top of the joint body (1), and the oil tank joint (11) is arranged on the side of the joint body (1). The air pipe joint (12) and the oil tank joint (11) are both installed on the joint body (1) through threaded connection.

3. The fuel tank helium detection tool as claimed in claim 2, characterized in that: The air pipe joint (12) and the oil tank joint (11) are both provided with a nut shaft shoulder (15).

4. The fuel tank helium detection tool as claimed in claim 1, characterized in that: The oil tank joint (11) is provided with three sealing rings (14), two of which are located at an end of the oil tank joint (11) away from the joint body (1), and the other is located at an end close to the joint body (1).

5. The fuel tank helium detection tool as described in any one of claims 1 to 4, characterized in that: The clamping mechanism comprises a left clamping plate (3a) and a right clamping plate (3b) respectively located on the left and right sides of the fuel tank joint (11); the left clamping plate (3a) and the right clamping plate (3b) are both arranged on the joint body (1) in an openable and closable manner by means of a spring (4); and a bayonet (31) which can be pressed against the outer wall of the filling pipe (21) under the action of the spring (4) is provided at one end of the left clamping plate (3a) and the right clamping plate (3b) close to the fuel tank joint (11).

6. The fuel tank helium detection tool as claimed in claim 5, characterized in that: The clamping mechanism also includes a left pressure plate (5a) and a right pressure plate (5b) respectively located outside the left clamping plate (3a) and the right clamping plate (3b); a left push rod (6a) and a right push rod (6b) are slidably arranged on the joint body (1) and penetrate the left and right sides thereof and the left clamping plate (3a) and the right clamping plate (3b); the two ends of the left push rod (6a) are respectively fixedly connected to the left pressure plate (5a) and the right clamping plate (3b); the two ends of the right push rod (6b) are respectively fixedly connected to the right pressure plate (5b) and the left clamping plate (3a); the spring (4) is arranged between the left clamping plate (3a) and the left pressure plate (5a), and between the right clamping plate (3b) and the right pressure plate (5b).

7. The fuel tank helium detection tool as claimed in claim 6, characterized in that: The left push rod (6a) and the right push rod (6b) each include two rods. The left push rod (6a) is connected to the left pressure plate (5a) via a screw (7), and the left push rod (6a) is connected to the right clamping plate (3b) via a nut (8); the right push rod (6b) is connected to the right pressure plate (5b) via a screw (7), and the right push rod (6b) is connected to the left clamping plate (3a) via a nut (8).

8. The fuel tank helium detection tool as claimed in claim 7, characterized in that: The left pressure plate (5a) and the right pressure plate (5b) are respectively provided with clearance holes (51) for the right push rod (6b) and the left push rod (6a) as well as the nut (8) to pass through.

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