Gas seal clamping test tool for fuel pipe

Abstract

The utility model discloses fuel pipe gas seal clamping test frock, include: frame, water tank is set up in the frame for bearing and is loaded with water liquid and carries out gas seal test, support shell is set up in the water tank, clamping unit is set up, and the number is multiple, and is linear array distribution in the support shell, air cylinder is set up with two groups and is symmetrically set up above the water tank, and its telescopic end is fixed with the support shell, is used for driving the clamping unit in support shell to drop in the water tank and is used for sealing test with water source cooperation, through setting up the partition in the water tank, creates an independent test water area for every measured fuel pipe, fundamentally puts an end to the problem of bubble cross interference when testing multiple pipes, through the guide plate gathers and imports the shell to the leakage bubble, uses the buoyancy of bubble and lifts the movable frame, makes the green warning piece lift and expose the red area of upper sealing plate, constitutes the double signal of eye -catching and easy to observe from a distance, reduces the observation difficulty of operator.

Description

Technical Field

[0001] This utility model relates to the field of pipeline sealing test technology, specifically to a fuel pipe gas sealing clamping test fixture. Background Technology

[0002] In the manufacturing and maintenance of engines and fuel systems in the automotive, aviation, and construction machinery industries, the sealing reliability of fuel pipeline assemblies is a key indicator of product safety and performance. Therefore, when the fuel pipeline comes off the production line or is accepted, a special gas seal clamping test fixture must be used to test its sealing performance.

[0003] Currently, known fixtures of this type typically include a clamping mechanism for fixing the pipe body, and one or more sealing joints for connecting with the pipe end fittings to form a sealed cavity. During testing, pressurized gas is injected into the sealed pipeline, and then the underwater bubble method is used to determine whether there is a leak. To improve testing efficiency, multiple fuel lines are usually tested simultaneously. The fixture is usually equipped with multiple sets of parallel clamping and sealing structures, and all the pipelines under test are submerged together in a common water tank. The sealing performance is judged by observing whether bubbles are generated.

[0004] However, this testing method using a public water tank has a significant drawback: when multiple pipes are densely arranged in the same body of water, bubbles generated from any leak point will float upwards under the influence of buoyancy. This causes the bubbles to diffuse randomly in the water and interfere with the bubbles rising from neighboring pipes, making it difficult for operators to quickly and accurately determine which specific pipe the bubbles originated from. Utility Model Content

[0005] In order to solve the technical problems existing in the prior art, the present invention provides a fuel pipe gas sealing clamping test fixture.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a fuel pipe gas seal clamping test fixture, comprising: a frame; The water tank, located in the frame, is used to hold and contain liquid water for gas tightness testing. The supporting shell is installed inside the water tank; Multiple clamping units are arranged in a linear array within the support shell; The cylinder has two sets symmetrically arranged above the water tank. Its telescopic end is fixed to the support shell and is used to drive the clamping unit inside the support shell to descend into the water tank to cooperate with the water source for sealing test. The auxiliary components, located inside the water tank, include a partition installed in the water tank to isolate multiple clamping units, and a warning component that works in conjunction with the partition to indicate when a leak occurs.

[0007] Preferably, the separator includes: The number of partitions is the same as that of the clamping units. They are fixed inside the water tank and located between the two clamping units. Their surfaces are slidably connected to the support shell.

[0008] Preferably, the warning device includes: The cover plate is located above the water tank, and its rear end is rotatably connected to the water tank via a pivot. The housing is located above the cover plate, and its number is the same as that of the clamping units; Two guide plates are provided and are symmetrically and integrally fixed to both sides of the lower end of the housing.

[0009] Preferably, the two guide plates are designed in an inverted V-shape, and their length covers the clamping unit to guide water bubbles generated at the pipe leak into the housing.

[0010] Preferably, the upper part of the shell surface is transparent.

[0011] Preferably, the warning device also includes: The movable frame slides vertically within the housing, with sealed plates at both ends. The warning sign is placed above the movable frame and is located in the transparent part of the casing; its overall design is circular.

[0012] Preferably, the upper sealing plate of the movable frame is red, and the warning plate is green, which is used to lift the movable frame and raise the warning plate to expose the red sealing plate when bubbles accumulate.

[0013] Preferably, the warning device also includes: The scale, located on the surface of the partition, represents the height of the water filling. The scale is at the same level as the lower sealing plate of the movable frame.

[0014] Preferably, a water injection pipe is provided below the water tank, with its injection end extending into the water tank and its inlet end connected to an external supply device, for injecting water into the water tank to cooperate with the descending fuel pipe for a gas sealing test.

[0015] Compared with the prior art, this utility model provides a fuel pipe gas seal clamping test fixture, which has the following beneficial effects: (1) By setting up a separator in the water tank, an independent test water area is created for each fuel pipe under test, which fundamentally eliminates the problem of cross-interference of air bubbles during multi-pipe testing; (2) The leaking bubbles are gathered by the guide plate and introduced into the shell. The buoyancy of the bubbles is used to lift the movable frame, so that the green warning plate is raised and the red area of ​​the upper sealing plate is exposed, forming a conspicuous and easy-to-observe dual signal, reducing the difficulty of observation for operators. Attached Figure Description

[0016] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the overall structure in the embodiment; Figure 2 This is a schematic diagram of the internal structure of the water tank in the embodiment; Figure 3 This is a schematic diagram of a half-section of the water tank in the embodiment; Figure 4 This is a schematic diagram of the side structure in the embodiment; Figure 5 This is a partial structural diagram of the warning element in the embodiment.

[0017] In the diagram: 100, frame; 110, cylinder; 111, clamping unit; 112, support shell; 120, water tank; 121, water injection pipe; 200, auxiliary components; 210, partition; 220, cover plate; 221, guide plate; 222, scale; 223, movable frame; 224, warning plate; 225, housing. Detailed Implementation

[0018] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0019] like Figure 1-5 As shown, this embodiment proposes a fuel line gas seal clamping test fixture, including: a frame 100; Water tank 120, installed in frame 100, is used to hold and contain water for gas tightness testing; Support shell 112 is installed inside water tank 120; Multiple clamping units 111 are arranged in a linear array within the support shell 112; When performing a sealing test on the fuel lines: First, install the multiple fuel lines to be tested into the clamping units 111 inside the support housing 112, and perform reliable clamping and end sealing. The clamping unit 111, as the core component of the pipeline sealing test, uses two horizontally opposed push rods fixed to the inner wall of the support shell 112 to drive the clamping plates to move in opposite directions. The rubber sealing plates on the end faces of the clamping plates seal and clamp both ends of the fuel pipe. After forming a sealed cavity, the external air source injects test gas into the pipe through the gas injection channel in the center of the clamping plate. Then, the lifting cylinder 110 drives the entire vehicle to be submerged in the water tank 120, completing the preparation work for the underwater sealing test.

[0020] Two sets of cylinders 110 are symmetrically arranged above the water tank 120. Their telescopic ends are fixed to the support shell 112 and are used to drive the clamping unit 111 inside the support shell 112 down into the water tank 120 to cooperate with the water source for sealing test. Subsequently, the telescopic end of cylinder 110 controls the support shell 112 to descend to the designated position; Water injection pipe 121 is located below water tank 120. Its injection end extends into water tank 120, and its inlet end is connected to an external supply device. It is used to inject water into water tank 120 to cooperate with the descending fuel pipe for gas sealing test.

[0021] Next, the external water supply equipment was activated to inject test water into the water tank 120 through the water injection pipe 121; Then, an external air source injects gas at a predetermined pressure into the fuel line and begins to maintain the pressure. During this process, if there is a leak in a fuel line, bubbles will be generated at the leak point. The auxiliary component 200 is disposed inside the water tank 120 and includes a partition disposed in the water tank 120 for isolating multiple clamping units 111, and a warning component that works with the partition to indicate when a leak occurs.

[0022] The separator includes: The partition 210, the same number as the clamping unit 111, is fixed inside the water tank 120 and located between the two clamping units 111, and its surface is slidably connected to the support shell 112. Due to the isolation effect of the partition 210, these bubbles will not drift to adjacent workstations, but will be confined to the current independent chamber.

[0023] Warning items include: A cover plate 220 is positioned above the water tank 120, and its rear end is rotatably connected to the water tank 120 via a rotating shaft. The housing 225 is disposed above the cover plate 220, and its number is the same as that of the clamping units 111; Two guide plates 221 are provided and are symmetrically and integrally fixed to both sides of the lower end of the housing 225. The two guide plates 221 are designed in an inverted V shape, and their length covers the clamping unit 111. They are used to guide the water bubbles generated at the pipeline leak into the housing 225.

[0024] The bubbles rise under the action of buoyancy and are effectively captured by the inverted V-shaped guide plate 221 directly above the workstation. They then gather in the center and are finally guided into the corresponding shell 225.

[0025] The upper part of the surface of housing 225 is transparent; The warning message also includes: The movable frame 223 slides vertically within the housing 225, with sealing plates at both ends. The warning plate 224 is located above the movable frame 223 and in the transparent part of the housing 225. It has a circular design. The upper sealing plate of the movable frame 223 is red and the warning plate 224 is green. It is used to lift the movable frame 223 when bubbles accumulate, raise the movable frame 223 to lift the warning plate 224 and expose the red sealing plate to give a warning.

[0026] After the bubbles enter the shell 225, they will accumulate continuously in the lower part of the shell. As the number of bubbles increases, the buoyancy they generate will act on the lower sealing plate of the movable frame 223. When the accumulated bubbles reach a certain amount, the buoyancy generated is sufficient to overcome the weight of the movable frame 223 itself, and the buoyancy will push the entire movable frame 223 to slide upward.

[0027] As the movable frame 223 rises, the green ring warning plate 224 on it will also move upward. At this time, the green ring that was originally located on the upper part of the red upper sealing plate will be lifted by the movable frame 223, and the red upper sealing plate will be exposed through the transparent observation window of the housing 225. At this time, the operator only needs to observe the color change of the observation window of the housing 225 to know whether there is a leak in the corresponding fuel line.

[0028] The warning message also includes: The scale 222 is set on the surface of the partition 210 to represent the water filling height. The scale 222 is at the same horizontal line as the lower sealing plate of the movable frame 223. It should be noted that when filling with water, the water level should be accurately reached to the predetermined height by observing the scale 222 on the partition 210, that is, flush with the lower sealing plate of the movable frame 223. At this time, all warning devices are in the initial state: the movable frame 223 is located at the bottom of the stroke due to its own weight, and the green circular warning plate 224 is displayed in the transparent observation window of the housing 225, which indicates that it is normal.

[0029] In actual operation, the operator installs multiple fuel pipes to be tested into the clamping unit 111 inside the support shell 112. The clamping plates are driven to move towards each other by horizontally opposed double push rods, and the rubber sealing plates are used to seal and clamp the pipe ends to form a closed pipe cavity. The lifting cylinder 110 drives the support shell 112 into the water tank 120. Then, the external air source fills the pipe with test gas through the central channel of the clamping plate. The water injection pipe 121 fills the water tank 120 with water to the height marked by the scale 222 on the partition plate 210. If there is a leak in the fuel pipe, the generated bubbles are confined in an independent chamber by the isolation effect of the partition plate 210. They are then gathered and guided into the corresponding shell 225 by the inverted V-shaped guide plate 221. The bubbles accumulate in the shell 225 and generate buoyancy, which pushes the movable frame 223 to rise, causing the green warning ring to move up and reveal the red sealing plate. The location of the leak can be directly determined by the color change of the observation window.

[0030] In the description of this utility model, the terms "first," "second," "another," and "yet another" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0031] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Furthermore, in the description of this utility model, unless otherwise stated, "multiple" means two or more.

[0032] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A fuel line gas seal clamping test fixture, characterized in that, include: Rack (100); A water tank (120) is installed in the frame (100) and is used to hold water for gas sealing testing; The support shell (112) is installed inside the water tank (120); Multiple clamping units (111) are arranged in a linear array within the support shell (112); Two sets of cylinders (110) are symmetrically arranged above the water tank (120). Their telescopic ends are fixed to the support shell (112) and are used to drive the clamping unit (111) inside the support shell (112) down into the water tank (120) to cooperate with the water source for sealing test. An auxiliary component (200) is disposed inside a water tank (120) and includes a partition disposed in the water tank (120) for isolating multiple clamping units (111) and a warning element that works in conjunction with the partition to indicate when a leak occurs.

2. The fuel pipe gas seal clamping test fixture according to claim 1, characterized in that, The separator includes: The partition (210), the same number as the clamping unit (111), is fixed inside the water tank (120) and located between the two clamping units (111), and its surface is slidably connected to the support shell (112).

3. The fuel pipe gas seal clamping test fixture according to claim 1, characterized in that, Warning items include: A cover plate (220) is installed above the water tank (120), and its rear end is rotatably connected to the water tank (120) via a rotating shaft; The housing (225) is located above the cover plate (220), and its number is the same as that of the clamping unit (111); Two guide plates (221) are provided and are symmetrically and integrally fixed to both sides of the lower end of the housing (225).

4. The fuel pipe gas seal clamping test fixture according to claim 3, characterized in that, The two guide plates (221) are designed in an inverted V shape, and their length covers the clamping unit (111) to guide water bubbles generated at the pipe leak into the housing (225).

5. The fuel pipe gas seal clamping test fixture according to claim 3, characterized in that, The upper part of the surface of the housing (225) is transparent.

6. The fuel pipe gas seal clamping test fixture according to claim 3, characterized in that, The warning message also includes: The movable frame (223) slides vertically inside the housing (225), and both ends of it are sealed plates; The warning plate (224) is located above the movable frame (223) and in the transparent part of the housing (225), and its overall design is a ring.

7. The fuel pipe gas seal clamping test fixture according to claim 6, characterized in that, The upper sealing plate of the movable frame (223) is red, and the warning plate (224) is green. It is used to lift the movable frame (223) when bubbles accumulate, raise the warning plate (224) and expose the red sealing plate to provide a warning.

8. The fuel pipe gas seal clamping test fixture according to claim 2, characterized in that, The warning message also includes: The scale (222) is set on the surface of the partition (210) to represent the water filling height. The scale (222) is at the same horizontal line as the lower sealing plate of the movable frame (223).

9. The fuel pipe gas seal clamping test fixture according to claim 1, characterized in that, A water injection pipe (121) is provided below the water tank (120), with its injection end penetrating into the water tank (120) and its inlet end connected to an external supply device, for injecting water into the water tank (120) to cooperate with the descending fuel pipe for a gas sealing test.

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