Enclosure wall structure of common rail pipe
By designing the wall structure of the common rail pipe and using a combination of protective cover and leakage collection valve sensors, the fuel splashing problem caused by common rail pipe failure is solved, and the safety collection and leakage detection alarm of fuel are achieved, which improves safety and manufacturing Simplicity.
Patent Information
- Application Number
- CN202421208340.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-30
- Publication Date
- 2025-02-11
- Estimated Expiration
- 2034-05-30
AI Technical Summary
In the event of failure, the common rail pipes in existing engines are prone to cause high-pressure fuel to splash, endangering personnel safety. In addition, the common rail pipes with existing double-layer structures are difficult to manufacture and need to be replaced after damage, which is very costly.
A wall structure of a common rail pipe is designed, and the common rail pipe is covered with a protective cover body. A fuel leakage collection valve and a fuel leakage detection sensor are installed at the bottom. When a leakage is detected, a signal is sent to the ECU, an alarm is prompted to the user, and through The limit structure and installation holes fix common rail pipe.
Effectively prevent fuel leakage, meet the requirements of the double-layer structure, simplify the manufacturing process, reduce replacement costs, and promptly alarm through leakage detection to improve safety.
Smart Images
Figure CN222457613U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of engines, in particular to a surrounding wall structure of a common rail pipe. Background Art
[0002] In order to achieve high power and excellent emission, the common rail system is generally used in the existing engine fuel system. High-pressure common rail electronic fuel injection technology refers to a fuel supply method that completely separates the generation of injection pressure and the injection process from each other in a closed-loop system composed of a high-pressure fuel pump, a pressure sensor and an electronic control unit ECU. Because there is high-pressure fuel inside, the high-pressure fuel injection after the common rail pipe ruptures will impact the surrounding parts, cause serious harm to the personnel around the engine, and even cause an explosion.
[0003] The existing technology sets the common rail pipe to be two layers, the inner layer transports high-pressure fuel, and the outer layer forms a protective layer. When the inner pipe fails and fuel leaks, the outer pipe protects to prevent fuel from leaking out. The leaked fuel leaks into the space between the inner and outer pipes, and then flows out to the externally connected collector through the abnormal oil return interface to avoid accidents. However, the inner and outer pipes are an integrated structure, which is difficult to manufacture, and once the outer pipe is damaged, it needs to be completely replaced, and the replacement cost is high. The setting of the protective structure increases the difficulty of the internal layout of the diesel engine, increases the types and number of parts, and is not conducive to the simplification of the internal structure of the engine.
[0004] The information disclosed in this background technology section is only intended to increase the understanding of the overall background of the present invention, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art already known to a person skilled in the art. Utility Model Content
[0005] The utility model aims to provide a common rail pipe surrounding wall structure which can prevent common rail pipe fuel from splashing and give an early warning of oil leakage.
[0006] To achieve the above-mentioned purpose, the utility model provides a wall structure of a common rail pipe, comprising: a protective cover body, a cavity is provided inside the protective cover body, the cavity is used to cover the common rail pipe, and a first through hole and a second through hole are provided at the bottom of the protective cover body; a fuel leakage collection valve, the fuel leakage collection valve is installed at the bottom of the protective cover body through the first through hole, and is used to discharge the fuel accumulated in the protective cover body; a fuel leakage detection sensor, the fuel leakage detection sensor is installed at the bottom of the protective cover body through the second through hole, and the fuel leakage detection sensor is used to send a signal to the ECU when detecting fuel leakage.
[0007] In one or more embodiments, the protective cover body includes a shell and a top cover, and the shell and the top cover are detachably connected to form a sealed box-shaped structure with a cavity inside after being spliced.
[0008] In one or more embodiments, the connecting ends of the shell and the top cover are respectively provided with a plurality of half holes of corresponding positions and the same size, which are assembled to form a plurality of oil pipe openings, and the plurality of oil pipe openings are adapted to the size and position of the plurality of oil pipes of the common rail pipe, and are used to accommodate the plurality of oil pipes connected to the common rail pipe.
[0009] In one or more embodiments, the bottom of the inner side of the protective cover body is flat.
[0010] In one or more embodiments, the bottom of the fuel leakage collection valve is connected to the fuel leakage collection tank through an oil outlet pipe, so as to collect the leaked fuel for reuse.
[0011] In one or more embodiments, the shell is provided with a plurality of third through holes, and the top cover is provided with a plurality of matching fourth through holes, and when the shell and the top cover are closed, the third through holes and the fourth through holes together form a plurality of tubular structures, and the tubular structures are used to install the first bolt.
[0012] In one or more embodiments, a plurality of first mounting holes communicating with the internal cavity are provided on one side of the protective cover body, and the first mounting holes match with second bolts provided with sealing gaskets for mounting the protective cover body on other components.
[0013] In one or more embodiments, a plurality of second mounting holes are provided in the protective cover body, and positions of the second mounting holes correspond to third mounting holes on the common rail pipe, and are used for mounting and fixing the common rail pipe.
[0014] In one or more embodiments, the inner side surface of the protective cover body has a limiting structure whose shape and position match those of the common rail pipe, so as to limit and support the common rail pipe.
[0015] In one or more embodiments, the lower half of the protective cover body protrudes outward.
[0016] The utility model provides a wall structure of a common rail pipe, a protective cover is set to surround the common rail pipe to form a sealing structure to prevent fuel leakage, and the fuel pipeline that meets the ship inspection requirements must be a double-layer structure; a fuel leakage collection port is designed at the bottom of the protective cover to collect fuel leaked due to a fault; at the same time, a fuel leakage detection sensor is designed at the bottom of the protective cover, and when a diesel leak is detected, a high-level signal is provided to the ECU, and after receiving the signal, the ECU outputs an alarm indication to the instrument, and the instrument alarm prompts the user; a mounting hole and a limit structure for fixing the common rail pipe are provided in the protective cover, and the oil pipe connected to the side wall and the common rail pipe is tightly connected to fix it, supporting the common rail pipe structure and playing the role of a bracket. It is easy to install, has a firm structure, and responds quickly. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a schematic diagram of the internal structure of a surrounding wall structure of a common rail pipe provided in an embodiment of the utility model.
[0018] Figure 2 It is a front view of a surrounding wall structure of a common rail pipe provided in an embodiment of the utility model.
[0019] Figure 3 It is a side structural schematic diagram of a surrounding wall structure of a common rail pipe provided in an embodiment of the utility model.
[0020] Description of main reference numerals:
[0021] 1-protective cover body, 11-first through hole, 12-second through hole, 13-shell, 131-third through hole, 14-top cover, 141-fourth through hole, 15-connecting end, 16,-oil pipe port, 17-first mounting hole, 18-second mounting hole, 19-limiting structure, 2-fuel leakage collection valve, 3-fuel leakage detection sensor, 4-first bolt. DETAILED DESCRIPTION
[0022] The specific implementation modes of the present invention are described in detail below in conjunction with the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific implementation modes.
[0023] Unless explicitly stated otherwise, throughout the specification and claims, the term “comprise” or variations such as “include” or “comprising”, etc., will be understood to include the stated elements or components but not to exclude other elements or components.
[0024] A wall structure of a common rail pipe, such as Figures 1 to 3 As shown, it includes: a protective cover body 1, wherein a cavity is provided inside the protective cover body 1, wherein the cavity is used to cover the common rail pipe, and a first through hole 11 and a second through hole 12 are provided at the bottom of the protective cover body 1; a fuel leakage collection valve 2, wherein the fuel leakage collection valve 2 is installed at the bottom of the protective cover body 1 through the first through hole 11, and is used to discharge the fuel accumulated in the protective cover body 1; a fuel leakage detection sensor, wherein the fuel leakage detection sensor is installed at the bottom of the protective cover body 1 through the second through hole 12, and the fuel leakage detection sensor is used to send a signal to the ECU when a fuel leakage is detected.
[0025] Specifically, the fuel leak detection sensor can send a high-level signal to the ECU, and the ECU outputs an alarm indication to the instrument after receiving the signal, and the instrument issues an alarm to prompt the user. The shape of the cavity is a rectangular parallelepiped structure whose length and width match the common rail pipe, so that the common rail pipe is suspended and fixed in the protective cover body 1. The common rail pipe and the pump connected to the common rail pipe are completely enclosed in the cavity, and only the oil pipe extends out of the protective cover body 1 through the oil pipe port 16. The fuel leak detection sensor is located at the bottom of the protective cover body 1, and can detect the oil leak in the first time when the oil leak occurs.
[0026] As an optional implementation, the protective cover body 1 includes a shell 13 and a top cover 14, and the shell 13 and the top cover 14 are detachably connected to form a sealed box-shaped structure with a cavity inside after being spliced.
[0027] Specifically, the common rail pipe is usually arranged in a horizontal direction perpendicular to the direction of gravity, and to match this, the protective cover body 1 is also arranged in a horizontal direction. The protective cover body 1 is divided into two parts, and the shell 13 and the top cover 14 are similar in size and shape, and are basically symmetrically distributed, so that the common rail pipe can be easily installed and disassembled therein. As a preferred embodiment, after being installed inside the protective cover body 1, the common rail pipe is perpendicular to the direction of gravity, and the oil pipes connected to the common rail pipe are respectively located on the top side and the left and right sides. The long side of the protective cover body 1 is parallel to the direction of the common rail pipe, the height is parallel to the direction of gravity, and the width direction is perpendicular to the height and the long side. The interface between the shell 13 and the top cover 14 divides the wide side vertically in half.
[0028] As an optional embodiment, the connecting ends 15 of the shell 13 and the top cover 14 are respectively provided with a plurality of half holes of corresponding positions and the same size, which are assembled to form a plurality of oil pipe openings 16. The plurality of oil pipe openings 16 are adapted to the size and position of the plurality of oil pipes of the common rail pipe and are used to accommodate the plurality of oil pipes connected to the common rail pipe.
[0029] Specifically, a plurality of oil pipes are respectively provided at both ends and the top of the common rail pipe, and the oil pipes extend from the inside of the protective cover body 1 through the oil pipe opening 16, and the size and shape of the oil pipe opening 16 formed by clamping the two ends of the shell 13 and the top cover 14 match the oil pipes, limiting the displacement of the oil pipes and indirectly fixing the common rail pipe. The oil pipe opening 16 is a circular hole that matches the size and shape of the oil pipe, and the half hole can be an equal division of the oil pipe opening 16, or it can be divided into two irregular halves. As a preferred embodiment, the oil pipe opening 16 is perpendicular to the side wall of the protective cover body 1. A gasket is provided between the oil pipe opening 16 and the oil pipe to prevent fuel leakage and further limit the movement of the oil pipe.
[0030] As an optional implementation, the bottom shape of the inner side surface of the protective cover body 1 is flat.
[0031] Specifically, the bottom of the inner side of the protective cover body 1 is flat and has no raised structure, which is convenient for collecting fuel and ensures that the fuel leaked from any pipe mouth can smoothly reach the fuel detector and the fuel leakage collection valve 2 at the bottom. The fuel detector can respond quickly when the fuel leaks, and the leaked fuel will not accumulate at the bottom of the protective cover body 1, but can be smoothly transported to the fuel collection tank through the fuel leakage collection valve. As a preferred embodiment, a groove is provided at the bottom end of the protective cover body 1, and the direction of the groove is parallel to the common rail pipe and is arranged at the center line of the bottom of the protective cover body 1. The groove has an inwardly inclined slope, the groove is the lowest at the center line, and the two ends are gradually raised near the side walls of the protective cover body 1, and are gradually used to guide the fuel. The first through hole 11 and the second through hole 12 are arranged in the groove to reduce the accumulation of fuel, so that the fuel can flow out smoothly through the fuel leakage collection valve 2 along the slope of the groove under the action of gravity.
[0032] As an optional implementation, the bottom of the fuel leakage collection valve 2 is connected to the fuel leakage collection tank through an oil outlet pipe, so as to collect the leaked fuel for reuse.
[0033] Specifically, a valve is provided on the fuel leakage collection tank for controlling the fuel intake speed. The fuel leakage collection tank can collect the fuel discharged from the protective cover body 1 in time, and recycle and reuse it.
[0034] As an optional embodiment, the shell 13 is provided with a plurality of third through holes 131, and the top cover 14 is provided with a plurality of matching fourth through holes 141, and when the shell 13 and the top cover 14 are closed, the third through holes 131 and the fourth through holes 141 together form a plurality of tubular structures, and the tubular structures are used to install the first bolt 4.
[0035] Specifically, the third through hole 131 and the fourth through hole 141 are respectively scattered around the connecting ends 15 of the shell 13 and the top cover 14, and penetrate the connecting ends 15. The aperture positions of the fourth through hole 141 and the fourth through hole 141 are directly opposite to each other after the shell 13 and the top cover 14 are assembled, forming a through tubular structure, which is convenient for the through installation of the bolts.
[0036] As an optional embodiment, a plurality of first mounting holes 17 connected to the internal cavity are provided on one side of the protective cover body 1, and the first mounting holes 17 match with second bolts provided with sealing gaskets for installing the protective cover body 1 on other components.
[0037] Specifically, the first mounting holes 17 are multiple and are arranged on the same side of the protective cover body 1. The first mounting holes 17 penetrate from the outside of one side of the protective cover body 1 to the inside of the same side. The first mounting holes 17 cooperate with bolts to be installed on other components. A sealing gasket is provided between the bolts and the mounting holes to prevent fuel from leaking from the mounting holes. The size and texture of the bolts match those of the first mounting holes 17.
[0038] As an optional implementation, a plurality of second mounting holes 18 are provided in the protective cover body 1 , and positions of the second mounting holes 18 correspond to third mounting holes on the common rail pipe, and are used for mounting and fixing the common rail pipe.
[0039] Specifically, it is used to fix the common rail pipe on the protective shell body and cooperate with the oil pipe port 16 to fix the common rail pipe. The second mounting hole 18 is convexly arranged on the inner side of the protective cover body 1. As a preferred embodiment, there are two second mounting holes 18, which can ensure the firmness of the fixing effect of the common rail pipe while minimizing the number of mounting holes. The multiple mounting holes are arranged horizontally and on the same straight line.
[0040] As an optional implementation, the inner side surface of the protective cover body 1 has a limiting structure 19 whose shape and position match the common rail pipe, and is used to limit and support the common rail pipe.
[0041] Specifically, the position and shape of the limiting structure 19 match the common rail pipe, and is used to fill the void space in the protective cover body 1 after the common rail pipe is installed, support the common rail pipe and limit the displacement of the common rail pipe. As a preferred embodiment, the first mounting hole 17 and the second mounting hole 18 are arranged on the limiting structure 19, and the limiting structure 19 is combined with the mounting hole to save space.
[0042] As an optional implementation, the lower half of the protective cover body 1 protrudes outward.
[0043] Specifically, the lower half of the protective cover body 1 protrudes outward, has a larger oil capacity, and the upper half is thinner, which saves space and is convenient for installation.
[0044] By adopting the above technical solution, a protective cover is set to enclose the common rail pipe to form a sealing structure to prevent fuel leakage. The fuel pipeline that meets the ship inspection requirements must be a double-layer structure; a fuel leakage collection port is designed at the bottom of the protective cover to collect fuel leaked due to a fault; at the same time, a fuel leakage detection sensor is designed at the bottom of the protective cover. When a diesel leak is detected, a high-level signal is provided to the ECU. After receiving the signal, the ECU outputs an alarm indication to the instrument, and the instrument alarm prompts the user; the protective cover is provided with a mounting hole and a limit structure for fixing the common rail pipe, and the oil pipe connected to the side wall and the common rail pipe is tightly connected to fix it, supporting the common rail pipe structure and playing the role of a bracket. It is easy to install, has a firm structure, and responds quickly.
[0045] The foregoing description of specific exemplary embodiments of the utility model is for the purpose of illustration and illustration. These descriptions are not intended to limit the utility model to the precise form disclosed, and it is clear that many changes and variations can be made based on the above teachings. The purpose of selecting and describing the exemplary embodiments is to explain the specific principles of the utility model and its practical application, so that those skilled in the art can realize and utilize various different exemplary embodiments of the utility model and various different options and changes. The scope of the utility model is intended to be defined by the claims and their equivalents.
Claims
1. A wall structure of a common rail pipe, characterized in that: include: A protective cover body, wherein a cavity is provided inside the protective cover body, and the cavity is used to cover the common rail pipe, and a first through hole and a second through hole are provided at the bottom of the protective cover body; a fuel leakage collection valve, the fuel leakage collection valve being installed at the bottom of the protective cover body through the first through hole and being used for discharging the fuel in the protective cover body; A fuel leakage detection sensor is installed at the bottom of the protective cover body through the second through hole, and the fuel leakage detection sensor is used to send a signal to the ECU when a fuel leakage is detected.
2. The surrounding wall structure of the common rail pipe according to claim 1, characterized in that: The protective cover body comprises a shell and a top cover, and the shell and the top cover are detachably connected to form a sealed box-shaped structure with a cavity inside after being spliced.
3. The surrounding wall structure of the common rail pipe according to claim 2, characterized in that: The connecting ends of the shell and the top cover are respectively provided with a plurality of half holes of corresponding positions and the same size, which are assembled to form a plurality of oil pipe openings. The plurality of oil pipe openings are adapted to the size and position of the plurality of oil pipes of the common rail pipe and are used to accommodate the plurality of oil pipes.
4. The surrounding wall structure of the common rail pipe according to claim 1, characterized in that: The bottom of the inner side of the protective cover body is flat.
5. The surrounding wall structure of the common rail pipe according to claim 1, characterized in that: The bottom of the fuel leakage collection valve is connected to the fuel leakage collection tank through an oil outlet pipe, so as to collect the leaked fuel for reuse.
6. The surrounding wall structure of the common rail pipe according to claim 2, characterized in that: The shell is provided with a plurality of third through holes, and the top cover is provided with a plurality of matching fourth through holes. When the shell and the top cover are closed, the third through holes and the fourth through holes together form a plurality of tubular structures, and the tubular structures are used to install the first bolts.
7. The surrounding wall structure of the common rail pipe according to claim 1, characterized in that: One side of the protective cover body is provided with a plurality of first mounting holes communicating with the internal cavity, and the first mounting holes match with second bolts provided with sealing pads, and are used for mounting the protective cover body on other components.
8. The surrounding wall structure of the common rail pipe according to claim 1, characterized in that: A plurality of second mounting holes are arranged in the protective cover body, and the positions of the second mounting holes correspond to the third mounting holes on the common rail pipe, and are used for mounting and fixing the common rail pipe.
9. The surrounding wall structure of the common rail pipe according to claim 1, characterized in that: The inner side surface of the protective cover body has a limiting structure whose shape and position match the common rail pipe, and is used to limit and support the common rail pipe.
10. The surrounding wall structure of the common rail pipe according to claim 1, characterized in that: The lower half end of the protective cover body protrudes outwards.