Quick connector for diesel engine fuel system pipeline

Abstract

The utility model discloses a quick connector for a diesel engine fuel system pipeline, which comprises a hollow mandrel, an outer sleeve is screwed at the lower part of the mandrel, a gland is screwed at the upper part of the outer sleeve, a first compression step is arranged in the gland, and the compression step is attached to a second compression step at the upper end of the mandrel; the outer side of the lower end of the outer sleeve is symmetrically provided with clamping assemblies connected with a product connector in a sealed mode. In conclusion, the quick connecting device has the advantages of being quick in connection, stable in sealing, high in universality, safe, reliable and the like, can meet the requirements of different types of diesel engine fuel oil system pipelines, improves the safety and reliability of a fuel oil system, and reduces the maintenance cost and the working intensity.

Description

Technical Field

[0001] The utility model belongs to the technical field of pipeline connection of a diesel engine fuel system, and particularly relates to a quick connector for a pipeline of a diesel engine fuel system. Background Art

[0002] In the field of diesel engine fuel system pipeline connection, with the continuous advancement of technology and changes in market demand, quick-connect connectors have gradually replaced traditional threaded connectors due to their convenient installation and simple operation. This change is particularly significant in high-precision and high-requirement products such as common rail pumps. As a key component of diesel engines, the common rail pump must ensure a high degree of sealing and reliability in the pipeline connection of its fuel system to ensure the stability of fuel supply and the efficient operation of the engine.

[0003] However, in the actual production process, the update of equipment pipelines often faces many challenges. Traditional production and testing equipment pipelines are mostly threaded structures. If they are directly replaced with injection molded quick-connect fittings on the market, although the connection can be achieved, the entire equipment pipeline needs to be replaced on a large scale, which not only increases production costs, but may also lead to a decline in equipment performance. In addition, the service life of injection molded quick-connect fittings is relatively short. Frequent replacement not only affects production efficiency, but may also have an adverse effect on product quality.

[0004] Therefore, in order to solve this problem, it is urgent to develop a transfer device that can not only meet the needs of quick connection and sealing, but also improve production efficiency and avoid large-scale equipment pipeline replacement costs in the current diesel engine fuel system pipeline connection field. In this context, this technology proposes a process quick-connect connector based on a mechanical structure, which aims to achieve effective transfer between the original equipment pipeline and the quick-connect connector on the product to meet the needs of production testing. Utility Model Content

[0005] In view of the problems existing in the prior art, the utility model provides a quick connector for a pipeline of a diesel engine fuel system.

[0006] The utility model is implemented as follows: a quick connector for a diesel engine fuel system pipeline, characterized in that it includes a hollow core shaft, a jacket is screwed onto the lower part of the core shaft, a pressure cover is screwed onto the upper part of the jacket, a first clamping step is arranged inside the pressure cover, and the clamping step is fitted with a second clamping step at the upper end of the core shaft; and a clamping assembly that is sealed and connected to a product joint is symmetrically arranged on the outer side of the lower end of the jacket.

[0007] Preferably, the clamping assembly comprises a hook plate, the lower part of the hook plate is provided with an inward clamping hook, the middle part of the hook plate is hinged on the outer wall of the outer sleeve through a rotating shaft, and the rotating shaft is fixedly connected to the hook plate through a locking screw; a notch is provided on the inner side of the upper part of the hook plate, a rotation space is formed between the notch and the outer wall of the outer sleeve, and a spring is installed on the hook plate at the notch;

[0008] A groove is arranged at the lower end of the core shaft, and a sealing ring is arranged in the groove.

[0009] Preferably, a screw hole is provided at the lower portion of the hook plate in a radial direction, a set screw is screwed into the screw hole, and the set screw is used to limit the opening angle of the hook plate.

[0010] Preferably, a locking nut is threadedly mounted on the outer side of the set screw.

[0011] Preferably, an adjustment pad is provided between the pressure cover and the outer sleeve.

[0012] Advantages and technical effects of the utility model: The utility model provides a quick connector for a diesel engine fuel system pipeline, which has the following advantages and technical effects:

[0013] Quick connection and sealing performance: Through the cooperation of the hollow mandrel, the outer sleeve and the gland, and the close fit between the first compression step in the gland and the second compression step on the mandrel, the quick installation and stable sealing of the pipeline connection are achieved. This design not only simplifies the installation steps and improves work efficiency, but also effectively avoids the fuel leakage problem caused by loose connection.

[0014] Efficient clamping assembly: The clamping assembly adopts the design of hook plate and clamping hook. The elastic force of the spring enables the hook plate to automatically clamp with the product joint to achieve a quick sealed connection. At the same time, the middle part of the hook plate is hinged to the outer wall of the jacket through a rotating shaft, making the clamping process more flexible and able to adapt to product joints of different specifications and shapes.

[0015] Stable sealing performance: A sealing ring is installed in the groove at the lower end of the mandrel, which effectively ensures the sealing performance between the mandrel and the outer sleeve. The design of the sealing ring can prevent fuel from leaking from the connection, improving the safety and reliability of the entire fuel system.

[0016] Adjustable clamping angle: Through the screw holes and set screws set in the radial direction at the bottom of the hook plate, the opening angle of the hook plate can be easily adjusted to adapt to product connectors of different sizes. This design makes the quick connector more universal and adaptable, and can be widely used in different types of diesel engine fuel system pipelines.

[0017] Locking function and safety protection: The locking nut screwed on the outside of the set screw can further lock the opening angle of the hook plate to prevent the hook plate from loosening due to vibration or impact during use. At the same time, the locking nut also plays a role in safety protection, ensuring the stability and safety of the connection process.

[0018] Flexible installation adjustment: The adjustment pad set between the gland and the jacket can adjust the clamping force between the gland and the mandrel according to actual needs to achieve the best sealing effect. This design makes the quick connector more flexible and convenient during installation, and can be personalized according to different usage environments and requirements.

[0019] To sum up, the utility model provides a quick connector for diesel engine fuel system pipelines, which has the advantages of quick connection, firm sealing, strong versatility, safety and reliability, etc. It can meet the needs of fuel system pipelines of diesel engines of different models, improve the safety and reliability of the fuel system, and reduce maintenance costs and work intensity. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of the utility model;

[0021] Figure 2 yes Figure 1 Middle AA section view;

[0022] Figure 3 yes Figure 2 Middle BB section view;

[0023] Figure 4 It is a schematic diagram of the hook plate structure;

[0024] Figure 5 yes Figure 4 Middle CC section view.

[0025] In the figure, 1, core shaft; 2, pressure cover; 3, adjustment pad; 4, outer sleeve; 5, spring; 6, hook plate; 6-1, hook; 6-2, notch; 6-3, screw hole; 7, locking screw; 8, rotating shaft; 9, locking nut; 10, set screw; 11, collar; 12, sealing ring. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail in combination with the embodiments below. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not used to limit the utility model.

[0027] See also Figures 1 to 4A quick connector for a diesel engine fuel system pipeline includes a hollow core shaft 1, a jacket 4 is screwed on the lower part of the core shaft, and a gland 2 is screwed on the upper part of the jacket. The screw connection method ensures the stability and reliability between the components and is convenient for installation and disassembly. The hollow design is conducive to the flow of fuel and reduces pressure loss; it improves the durability and sealing of the entire quick connector and ensures the smooth flow of fuel.

[0028] A first clamping step 2-1 is provided in the gland, and the clamping step fits with the second clamping step 1-1 at the upper end of the core shaft; through the fitting of the steps, the contact area of ​​the connecting surface is increased, the sealing effect is improved, fuel leakage is effectively prevented, and the safety and reliability of the system are ensured.

[0029] The lower end of the outer jacket is symmetrically provided with a snap-on assembly that is sealed and connected to the product joint. Preferably, the snap-on assembly includes a hook plate 6, the lower part of the hook plate is provided with an inward snap-on hook 6-1, the middle part of the hook plate is hinged on the outer wall of the outer jacket through a rotating shaft 8, the rotating shaft is fixedly linked to the hook plate through a locking screw 7, and the two ends of the rotating shaft serve as turning points; a notch 6-2 is provided on the inner side of the upper part of the hook plate, and a rotation space is formed between the notch and the outer wall of the outer jacket, and a spring 5 is installed on the hook plate at the notch; the snap-on assembly realizes quick connection and sealing with the product joint through the design of the hook plate and the snap-on hook; the addition of the spring enables the hook plate to automatically reset, which is convenient for multiple uses. The installation efficiency is improved, the operation difficulty is reduced, and the sealing and stability of the connection are guaranteed at the same time.

[0030] A groove 2-2 is provided at the lower end of the core shaft, and a sealing ring 12 is provided in the groove. The groove provides an installation space for the sealing ring, and the sealing ring can effectively prevent fuel from leaking from the gap between the core shaft and the outer sleeve, further improving the sealing performance of the quick connector and ensuring the safety and reliability of the system.

[0031] Preferably, the lower part of the hook plate 6 is provided with a screw hole 6-3 in the radial direction, and a set screw 10 is screwed into the screw hole. The top screw is used to limit the opening angle of the hook plate. In order to prevent the top screw from damaging the mandrel, a collar 11 is provided at the position corresponding to the set screw, and is simultaneously sleeved on the mandrel to prevent the O-ring from falling off. A locking nut 9 is screwed onto the outer side of the set screw. The combination of the set screw and the locking nut can adjust the opening angle of the hook plate to adapt to product connectors of different specifications. The locking nut can fix the set screw to prevent loosening, thereby enhancing the versatility of the quick connector, improving the stability and reliability of the connection, and reducing maintenance costs.

[0032] Preferably, an adjustment pad 3 is provided between the gland and the outer sleeve, and the gland 2 is screwed into the outer sleeve 4 in cooperation with the adjustment pad 3 and is integrally mounted on the mandrel 1. The adjustment pad 3 needs to be ground with a size L1 to ensure that the hook plate 6 hook claw and the mandrel 1 and the product joint contact surface size L2. The adjustment pad can adjust the pressing force between the gland and the mandrel as needed to achieve the best sealing effect, thereby improving the sealing performance of the quick connector and reducing the risk of leakage. At the same time, the addition of the adjustment pad also makes the installation process more flexible and convenient.

[0033] During operation, the upper end of the mandrel 1 is connected to the oil pipe of the equipment, the upper end of the hook plate 6 is pressed to open it, the lower end of the mandrel 1 is inserted into the product joint and a certain downward pressure is applied to make the sealing ring 12 fully contact with the end face of the product joint, the hook plate 6 is released to reset it under the action of the spring 5, and the hook claw below the hook plate 6 falls into the ring groove of the product joint to achieve connection and sealing. After the work is completed, the upper end of the hook plate 6 is pressed, the hook claw opens and disengages from the ring groove of the product joint, and the whole set of mechanisms can be extracted from the upper and lower parts.

[0034] The utility model has the advantages of quick connection, firm sealing, strong versatility, safety and reliability, etc., can meet the requirements of fuel system pipelines of diesel engines of different models, improves the safety and reliability of the fuel system, and reduces maintenance costs and work intensity.

[0035] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A quick connector for diesel engine fuel system pipeline, characterized in that: It comprises a hollow core shaft, a sleeve is screwed on the lower part of the core shaft, a pressure cover is screwed on the upper part of the sleeve, a first clamping step is arranged inside the pressure cover, and the clamping step is fitted with a second clamping step on the upper end of the core shaft; a clamping assembly which is sealed and connected to the product joint is symmetrically arranged on the outer side of the lower end of the sleeve.

2. The quick connector for diesel engine fuel system pipeline according to claim 1, characterized in that: The clamping assembly includes a hook plate, the lower part of which is provided with an inward hook, the middle part of which is hinged on the outer wall of the outer sleeve through a rotating shaft, and the rotating shaft is fixedly connected to the hook plate through a locking screw; a notch is provided on the inner side of the upper part of the hook plate, and a rotation space is formed between the notch and the outer wall of the outer sleeve, and a spring is installed on the hook plate at the notch; a groove is provided at the lower end of the core shaft, and a sealing ring is provided in the groove.

3. The quick connector for diesel engine fuel system pipeline according to claim 2, characterized in that: The lower part of the hook plate is provided with a screw hole in the radial direction, and a set screw is screwed into the screw hole. The set screw is used to limit the opening angle of the hook plate.

4. The quick connector for diesel engine fuel system pipeline according to claim 3, characterized in that: A locking nut is threadedly mounted on the outer side of the set screw.

5. The quick connector for diesel engine fuel system pipeline according to claim 1, characterized in that: An adjustment pad is arranged between the pressure cover and the outer sleeve.

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