CN113847179A - Method for mounting high-pressure fuel pipe testing tool - Google Patents
Method for mounting high-pressure fuel pipe testing tool Download PDFInfo
- Publication number
- CN113847179A CN113847179A CN202111134186.6A CN202111134186A CN113847179A CN 113847179 A CN113847179 A CN 113847179A CN 202111134186 A CN202111134186 A CN 202111134186A CN 113847179 A CN113847179 A CN 113847179A
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- China
- Prior art keywords
- hole
- pressure fuel
- fuel pipe
- pipe
- pressure
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M65/00—Testing fuel-injection apparatus, e.g. testing injection timing ; Cleaning of fuel-injection apparatus
- F02M65/006—Measuring or detecting fuel leakage of fuel injection apparatus
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
- F02M55/004—Joints; Sealings
- F02M55/005—Joints; Sealings for high pressure conduits, e.g. connected to pump outlet or to injector inlet
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
- F02M55/02—Conduits between injection pumps and injectors, e.g. conduits between pump and common-rail or conduits between common-rail and injectors
- F02M55/025—Common rails
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
The high-pressure fuel pipe test tool mounting method includes that the internal structures of two end blocks imitate the connecting part structures of a high-pressure fuel pipe and a high-pressure fuel pump and a fuel injector and the high-pressure fuel pipe; the first end block is a cylinder with a through hole in the center, the outer circle of the lower section of the cylinder is provided with a thread connected with the upper end connector of the high-pressure fuel pipe, a sealing groove is arranged on the outer circle close to the upper surface of the thread, and a sealing ring is arranged in the groove and is sealed in connection with the high-pressure fuel pipe; the upper section of a through hole in the center of one end block is a connecting hole with internal threads, and a deflation screw is arranged in the connecting hole; the second end block is a cylinder with a through hole in the center, the inner circle in the middle section of the through hole is a thread connected with a lower end connector of the high-pressure oil pipe, the through hole upper section close to the thread is provided with a circular expansion hole, the circular expansion hole is matched and sealed with an excircle sealing groove of a lower end connector of the high-pressure oil pipe and a sealing ring, the wall of the circular expansion hole below the matched seal is provided with a leakage inspection hole, the lower section of the through hole is a connecting hole with internal threads, and a circular gasket is arranged in the connecting hole and communicated with a hydraulic pipe quick connector.
Description
Technical Field
The pressure testing device is used for realizing the pressure test of the high-pressure fuel pipe of the marine low-speed diesel engine. The simple device forms an installation method, and can quickly detect whether the high-pressure fuel pipe has a leakage problem.
Background
In the manufacturing process of a marine low-speed diesel engine (hereinafter referred to as a 'main engine'), a high-pressure fuel pipe is an important pipeline of the main engine, and high-pressure fuel (800bar) pressurized by a fuel pump is conveyed to a fuel injector to be injected into a combustion chamber. According to the different diameters of the main machine, each cylinder is configured with 2-4 cylinders, and the main machine is generally 5-7 cylinders (as shown in figure 1). The main machine standard matching tool does not contain a high-pressure fuel pipe pressure monitoring tool, and once the fuel leakage problem occurs on a ship, relevant pressure tests cannot be immediately carried out, and the cause of the problem cannot be quickly found out. Part of shipowners have specifically requested the addition of fuel line pressure test tools and have provided a set of high pressure fuel line test tool installation methods. Therefore, a simple test tool for the high-pressure fuel pipe of the low-speed diesel engine for the ship needs to be designed to solve the problems.
Disclosure of Invention
The invention relates to a method for installing a high-pressure fuel pipe test tool, which comprises two end blocks, wherein the two end blocks are respectively arranged at two sides of a high-pressure fuel pipe of a host machine, and the internal structure of the end block imitates the structure of a connecting part between the high-pressure fuel pipe and a high-pressure fuel pump as well as between a fuel injector and the high-pressure fuel pipe, and is characterized in that: the first end block is a cylinder with a through hole in the center, the outer circle of the lower section of the cylinder is provided with a thread connected with the upper end connector of the high-pressure fuel pipe, a sealing groove is arranged on the outer circle close to the upper surface of the thread, and a sealing ring is arranged in the groove and used for connecting and sealing with the high-pressure fuel pipe; the upper section of a through hole in the center of one end block is a connecting hole with internal threads, and a deflation screw is arranged in the connecting hole; the second end block is a cylinder with a through hole in the center, the inner circle in the middle section of the through hole is a thread connected with a lower end connector of the high-pressure oil pipe, the through hole upper section close to the thread is provided with a circular expansion hole, the circular expansion hole is matched and sealed with an excircle sealing groove of a lower end connector of the high-pressure oil pipe and a sealing ring, the wall of the circular expansion hole below the matched seal is provided with a leakage inspection hole, the lower section of the through hole is a connecting hole with internal threads, and a circular gasket is arranged in the connecting hole and is communicated with a hydraulic pipe quick connector.
The round gasket is arranged in the connecting hole, and after the round gasket is communicated with the hydraulic pipe quick connector, the air release screw is arranged at a high position; one end of the end block is connected with the high-pressure fuel pipe, and the device is arranged at two ends of the high-pressure fuel pipe, so that the functions of installation, sealing, air release, external connection with a high-pressure lubricating oil inlet, leakage inspection holes and the like required by a pressure test are realized; the oil inlet hole and the air vent are arranged on the end block, the sizes of the holes are the same, and the mounting positions can be exchanged according to the actual mounting condition of the oil pipe; the device has the characteristics of small size and simple and easy installation; whether the high-pressure fuel pipe leaks or not can be quickly judged according to the leakage check hole.
Drawings
FIG. 1: the host is provided with four high-pressure fuel pipes;
FIG. 2: the structural schematic diagrams of two ends of the high-pressure fuel pipe are shown;
figure 3 front view and cross-sectional a-a view of the construction of the first end-block;
FIG. 4 is a schematic view of the mounting of the first end block to a high pressure fuel line;
figure 5 front view and cross-sectional a-a view of the structure of end block two;
FIG. 6 is a schematic view of the mounting of the second end block to the high pressure fuel pipe;
FIG. 7 is a schematic diagram of the high pressure fuel pipe test tool and method of installation of the present invention.
Detailed Description
The invention relates to a high-pressure fuel pipe testing tool and an installation method thereof as shown in the attached drawings, which mainly comprise two end blocks, wherein the two end blocks are respectively installed at two sides of a high-pressure fuel pipe of a host. The internal structure of the end block is designed by imitating the connecting parts of the high-pressure fuel pipe and the high-pressure fuel pump and the fuel injector and the high-pressure fuel pipe (as shown in figure 2), a hydraulic oil inlet is arranged on the end block and is externally connected with a fuel supply pipeline of a hydraulic pump, a gas release port is used for discharging air in the pipe during the oil injection, and a fuel leakage inspection port is used for inspecting whether fuel leakage exists. The oil inlet hole and the air vent are arranged on the end block, the sizes of the holes are the same, and the mounting positions can be exchanged according to the actual mounting condition of the oil pipe; the device has the characteristics of small size and simple and easy installation, and can quickly judge whether the high-pressure fuel pipe leaks or not.
The test tool consists of:
1. end block one
A sealing ring is arranged in a groove of a first end block (shown in figure 3) and is used for sealing connection with a high-pressure fuel pipe; an air bleed screw or a round gasket and a hydraulic pipe quick connector can be arranged in the connecting hole (the air bleed screw is arranged at a high position and the round gasket and the hydraulic pipe quick connector are arranged at a low position according to the actual installation condition); one end of the end block is connected to a high pressure fuel pipe (see fig. 4).
2. End block two
A leakage inspection hole is formed in the second end block (as shown in figure 5); the internal threads of the end block are connected with a high-pressure fuel pipe (as shown in figure 6); the connecting hole can be internally provided with a deflation screw or a round gasket and a hydraulic pipe quick joint. (according to the actual installation situation, the general air release screw is installed at the high position, and the round gasket and the hydraulic pipe quick joint are installed at the low position).
Installation and use method (as shown in fig. 7):
1. and screwing the two end blocks into the two sides of the high-pressure fuel pipe.
2. A round gasket and a quick joint are arranged at the lower end of the position; and a deflation screw is arranged at the higher end of the air bag.
3. The pneumatic hydraulic pump and the quick connector are connected through a hydraulic hose, the air release screw is loosened through the hexagon socket wrench, the hydraulic pump is opened to fill oil into the pipe until no air bubbles are discharged from the air release port, and the air release screw is tightened.
4. And raising the pump pressure of the hydraulic pump, and gradually raising the oil pressure to the required requirement of the test pressure.
5. And observing whether oil flows out of the drainage inspection hole.
Claims (2)
1. A high-pressure fuel pipe test tool installation method, the test tool is made up of two end blocks, two end blocks are installed in the high-pressure fuel pipe both sides of host computer respectively, the internal structure of end block imitates the high-pressure fuel pipe and high-pressure fuel pump, fuel injector and high-pressure fuel pipe adapting unit structure, characterized by that: the first end block is a cylinder with a through hole in the center, the outer circle of the lower section of the cylinder is provided with a thread connected with the upper end connector of the high-pressure fuel pipe, a sealing groove is arranged on the outer circle close to the upper surface of the thread, and a sealing ring is arranged in the groove and used for connecting and sealing with the high-pressure fuel pipe; the upper section of a through hole in the center of one end block is a connecting hole with internal threads, and a deflation screw is arranged in the connecting hole; the second end block is a cylinder with a through hole in the center, the inner circle in the middle section of the through hole is a thread connected with a lower end connector of the high-pressure oil pipe, the through hole upper section close to the thread is provided with a circular expansion hole, the circular expansion hole is matched and sealed with an excircle sealing groove of a lower end connector of the high-pressure oil pipe and a sealing ring, the wall of the circular expansion hole below the matched seal is provided with a leakage inspection hole, the lower section of the through hole is a connecting hole with internal threads, and a circular gasket is arranged in the connecting hole and is communicated with a hydraulic pipe quick connector.
2. The method of installing a high pressure fuel pipe test tool as claimed in claim 1, wherein: the round gasket is arranged in the connecting hole, and after the round gasket is communicated with the hydraulic pipe quick connector, the air release screw is arranged at a high position; one end of the end block is connected with the high-pressure fuel pipe, and the device is arranged at two ends of the high-pressure fuel pipe, so that the functions of installation, sealing, air release, external connection with a high-pressure lubricating oil inlet, leakage inspection holes and the like required by a pressure test are realized; the oil inlet hole and the air vent are arranged on the end block, the sizes of the holes are the same, and the mounting positions can be exchanged according to the actual mounting condition of the oil pipe; the device has the characteristics of small size and simple and easy installation; whether the high-pressure fuel pipe leaks or not can be quickly judged according to the leakage check hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111134186.6A CN113847179A (en) | 2021-09-27 | 2021-09-27 | Method for mounting high-pressure fuel pipe testing tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111134186.6A CN113847179A (en) | 2021-09-27 | 2021-09-27 | Method for mounting high-pressure fuel pipe testing tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113847179A true CN113847179A (en) | 2021-12-28 |
Family
ID=78980568
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111134186.6A Pending CN113847179A (en) | 2021-09-27 | 2021-09-27 | Method for mounting high-pressure fuel pipe testing tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113847179A (en) |
-
2021
- 2021-09-27 CN CN202111134186.6A patent/CN113847179A/en active Pending
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