Injection valve test common rail device

Abstract

The utility model discloses a common rail device for testing an injection valve. The common rail device comprises a high-pressure oil supply system and a low-pressure oil control system, the high-pressure oil supply system comprises a first common rail pipe, a second common rail pipe, a first pressure sensor, a high-pressure proportional control valve, a high-pressure oil inlet connector and a pneumatic control cut-off safety valve, wherein the first pressure sensor and the high-pressure proportional control valve are installed on the first common rail pipe, and the high-pressure oil inlet connector is installed on the second common rail pipe. N injection valve mounting holes are formed in the first common rail pipe, and n to-be-tested injection valves are respectively mounted on the n injection valve mounting holes; the low-pressure control oil system comprises a third common rail pipe, and a low-pressure oil inlet joint, a second pressure sensor and a low-pressure proportional control valve which are mounted on the third common rail pipe; the third common rail pipe is provided with n control oil outlets, and the n control oil outlets are respectively connected with the electromagnetic valves on the n injection valves to be tested. According to the utility model, the problem of stable supply of a huge amount of oil required during testing can be solved, and the safety and the stability during testing are improved at the same time.

Description

TECHNICAL FIELD

[0001] The utility model belongs to marine low-speed dual-fuel engine gas control system test field, concretely relates to a kind of injection valve test common rail device. BACKGROUND

[0002] Gaseous fuel has flammable and explosive, toxic characteristics, plus the main engine design requirements system high pressure, which requires the entire gaseous fuel supply system has static and dynamic withstand high pressure capability.To ensure and meet the increasingly stringent emission standards of ship, injection valve as a very important part of ship, has been concerned and valued all the time;So the update design and optimization of marine injection valve are also changing, face to update more and more frequent injection valve, the existing test system is more and more difficult to meet the test requirements of injection valve;And the increasing development of ship leads to the growth of main engine order gradually obvious, the existing test system can only test a single same type injection valve, limitation and single function more and more prominent, make cost increasing, production efficiency cannot be improved.In addition, the pressure of injection valve when working is as high as 900bar, the required oil amount is huge, once emergency occurs, such as no effective measures, the risk is extremely high, which poses a great challenge to the safety of existing test system, and the security risk existing at all times is extremely great to the physical and mental harm of operator. SUMMARY

[0003] The utility model aims at providing a kind of injection valve test common rail device to solve the problem of huge oil amount stable supply required when testing, and improve the safety and stability when testing.

[0004] The injection valve test common rail device, comprising high-pressure oil supply system and low-pressure control oil system, high-pressure oil supply system and low-pressure control oil system are installed on connecting bracket.The high-pressure oil supply system includes first common rail pipe, second common rail pipe connected with the first common rail pipe through the first oil pipe, first pressure sensor and high-pressure proportional control valve installed on the first common rail pipe at intervals, and high-pressure oil inlet joint and gas control cut-off safety valve installed on the second common rail pipe at intervals;N injection valve mounting holes are arranged on the first common rail pipe at intervals, and n injection valves are respectively installed on the n injection valve mounting holes.The low-pressure control oil system includes third common rail pipe, and low-pressure oil inlet joint, second pressure sensor and low-pressure proportional control valve installed on the third common rail pipe at intervals;N control oil outlets are arranged on the third common rail pipe at intervals, and the n control oil outlets are respectively connected with electromagnetic valves on n injection valves through n second oil pipes;Wherein, n≥2.

[0005] Preferably, the first common rail pipe is further provided with a mechanical safety valve.The mechanical safety valve can set limit pressure through mechanical device, and automatically release pressure when system encounters emergency, to provide further safety guarantee for system.

[0006] Preferably, the third pressure sensor is installed on the second common rail pipe, and the first pressure gauge is installed on the second common rail pipe. The third pressure sensor ensures real-time monitoring of pressure changes on the second common rail pipe, and the first pressure gauge can be used to directly observe the pressure change. In the event of a sudden failure of the third pressure sensor, the first pressure gauge can be used to monitor the pressure in a timely manner to ensure safe testing.

[0007] Preferably, the second pressure gauge is installed on the third common rail pipe. The second pressure gauge can be used to directly observe the pressure change. In the event of a sudden failure of the second pressure sensor, the second pressure gauge can be used to monitor the pressure in a timely manner to ensure safe testing.

[0008] Preferably, the side wall of the high-pressure proportional control valve is uniformly provided with four control interfaces for connecting the proportional valve in the circumferential direction. The four control interfaces can realize stable control of oil pressure, maintenance of working pressure, and stable pressure relief of oil, effectively improving the safety and stability during testing.

[0009] Preferably, the upper end of the high-pressure oil inlet connector has two symmetrically arranged connector oil inlet ports, and the lower end of the high-pressure oil inlet connector has a connector oil outlet port that can communicate with the second common rail pipe. The design of two connector oil inlet ports on the high-pressure oil inlet connector simplifies and efficiently supplies oil to the high-pressure oil supply system.

[0010] Preferably, the first common rail pipe, the second common rail pipe, and the third common rail pipe are arranged in parallel and are fixedly installed on the connecting bracket by screws. The screw connection improves the convenience of disassembly and assembly.

[0011] Preferably, the first pressure sensor, the mechanical safety valve, and the high-pressure proportional control valve are installed on the first common rail pipe by tooling, the first pressure gauge is installed on the second common rail pipe by tooling, the low-pressure oil inlet connector, the second pressure gauge, the second pressure sensor, and the low-pressure proportional control valve are installed on the third common rail pipe by tooling. Tooling is installed on the n control oil outlets, and the control oil outlets are connected to the second oil pipe by tooling. Tooling is used to install each component on the first common rail pipe, the second common rail pipe, and the third common rail pipe, which greatly improves the interchangeability of the test assembly, reduces production costs, and improves the convenience of disassembly.

[0012] Preferably, the edge of the tool is provided with a plurality of connecting screw holes; the upper surface of the tool is provided with a boss in the middle, and a component mounting through hole is provided in the center, which has an internal thread; the lower surface of the tool is provided with a sealing ring mounting groove surrounding the component mounting through hole. During installation, the lower surface of the tool is attached to the corresponding mounting surface of the first common rail pipe, the second common rail pipe and the third common rail pipe respectively, the component mounting through hole is aligned with the corresponding hole, and the tool is fixedly connected to the first common rail pipe, the second common rail pipe or the third common rail pipe by screws passing through the plurality of connecting screw holes.

[0013] Preferably, the component mounting through hole is a stepped hole. The stepped hole can play a certain buffering role when the oil flow is too large.

[0014] The utility model has the following effects:

[0015] (1) The high-pressure oil supply system and the low-pressure control oil system are two independent systems. The low-pressure control oil system with lubricating oil as the working medium drives the electromagnetic valve on the to-be-tested injection valve to open / close, so as to adjust the injection frequency of the to-be-tested injection valve. The high-pressure oil supply system with pump oil as the working medium supplies high-pressure oil to the to-be-tested injection valve, ensuring the supply of oil quantity and the stability of working pressure during the operation of the injection valve.

[0016] (2) The first common rail pipe and the second common rail pipe are connected through the first oil pipe, ensuring the consistency of the cavity pressure of the first common rail pipe and the second common rail pipe during operation, ensuring the stability of the working pressure during testing, realizing the supply of the required oil quantity during the operation of the multiple stations and the 100% working condition of the to-be-tested injection valve, and solving the problem of stable supply of huge oil quantity under high-pressure working condition during injection valve testing.

[0017] (3) The design of the n injection valve mounting holes and the n control oil outlets can realize the simultaneous operation of multiple stations (at least two stations), and can simultaneously test n injection valves of different types through the n injection valve mounting holes, independently adjust the injection frequency of the n injection valves of different types, effectively improve the work efficiency, reduce the production cost, and improve the universality.

[0018] (4) The pneumatic control cut-off safety valve can set the safety pressure, automatically release the pressure when the system pressure is too high, prevent the system pressure from being too high, the first pressure sensor ensures the real-time monitoring of the pressure change of the first common rail pipe, and the second pressure sensor ensures the real-time monitoring of the pressure change of the third common rail pipe, so as to timely detect the working pressure of the high-pressure oil supply system and the low-pressure control oil system, greatly improve the safety and stability during testing.

[0019] (5) The structure is simple, safe, universal, practical, efficient, stable and low in production cost, and has popularization and application value in the field of ship supply system technology.BRIEF DESCRIPTION OF DRAWINGS BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is the front view schematic drawing of the injection valve test common rail device in the utility model.

[0021] Figure 2 It is the top view of Figure 1 .

[0022] Figure 3 It is the front view schematic drawing of the proportional control valve in the utility model.

[0023] Figure 4 It is the top view of Figure 3 .

[0024] Figure 5 It is the front view schematic drawing of the high-pressure oil inlet joint in the utility model.

[0025] Figure 6 It is the structure schematic drawing of the tooling in the utility model.

[0026] Figure 7 It is the A-A sectional view of Figure 6 . DETAILED DESCRIPTION

[0027] In order to enable more detailed understanding of the features and technical contents of the embodiments of the utility model, the implementation of the embodiments of the utility model is described in detail below, the attached drawings are only used for reference, and are not used to limit the embodiments of the utility model.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the utility model belongs. The terms used herein are only for the purpose of describing the embodiments of the utility model, and are not intended to limit the utility model.

[0029] In the following description, "some embodiments" are related to a subset of all possible embodiments, but it can be understood that "some embodiments" can be the same subset or different subsets of all possible embodiments, and can be combined with each other without conflict.

[0030] As shown in Figures 1 to 7 , the injection valve test common rail device in the utility model includes a high-pressure oil supply system 1 and a low-pressure control oil system 2, and the high-pressure oil supply system 1 and the low-pressure control oil system 2 are both installed on a connecting bracket 3.

[0031] The high-pressure oil supply system 1 comprises a first common rail 101, a second common rail 109 connected with the first common rail 101 through a first oil pipe 4, a first pressure sensor 103, a mechanical safety valve 104 and a high-pressure proportional control valve 105 which are installed on the first common rail 101 at intervals, and a high-pressure oil inlet joint 106, a third pressure sensor 102, a first pressure gauge 107 and a pneumatic safety valve 108 which are installed on the second common rail 109 at intervals. The first common rail 101 is provided with n injection valve mounting holes at intervals, and n injection valves 5 to be tested are respectively installed in the n injection valve mounting holes; wherein n≥2. As an example, the value of n is n=2, that is, the first common rail 101 is provided with 2 injection valve mounting holes at intervals, and 2 injection valves 5 to be tested are respectively installed in the 2 injection valve mounting holes.

[0032] The low-pressure control oil system 2 comprises a third common rail 204, and a low-pressure oil inlet joint 201, a second pressure gauge 202, a second pressure sensor 205 and a low-pressure proportional control valve 203 which are installed on the third common rail 204 at intervals. The third common rail 204 is provided with n control oil outlets at intervals, and the n control oil outlets are respectively connected with electromagnetic valves on n injection valves 5 through n second oil pipes 6, that is, the third common rail 204 is provided with 2 control oil outlets at intervals, and the 2 control oil outlets are respectively connected with electromagnetic valves on 2 injection valves 5 through 2 second oil pipes 6.

[0033] The low-pressure lubricating oil flows into the third common rail 204 from the low-pressure oil inlet joint 201, and flows out of the third common rail 204 from the low-pressure proportional control valve 203. The low-pressure lubricating oil drives the electromagnetic valves on the 2 injection valves 5 to open / close through the second oil pipes 6 at the 2 control oil outlets, thereby controlling the 2 injection valves 5 to work / stop working, or adjusting the injection frequency of the 2 injection valves 5.

[0034] The high-pressure pump calibration oil enters the second common rail 109 from the high-pressure oil inlet joint 106, then flows through the first oil pipe 4 into the first common rail 101, and flows out of the first common rail 101 from the high-pressure proportional control valve 105. When the 2 injection valves 5 work, the high-pressure pump calibration oil also flows out of the first common rail 101 from the oil outlets of the injection valves 5.

[0035] As shown in FIG. 1, Figure 2 In some embodiments, the first common rail 101, the second common rail 109 and the third common rail 204 are arranged in parallel with each other, and are all fixedly installed on the connecting bracket 3 through screws. The screw connection improves the convenience during disassembly and assembly.

[0036] As shown in FIG. 1, Figure 3 , Figure 4As shown in the drawings, in some embodiments, the high-pressure proportional control valve 105 has an oil inlet joint arranged at the lower end and an oil outlet joint arranged at the upper end, and the side wall of the high-pressure proportional control valve 105 is uniformly provided with four control interfaces for connecting the proportional valve 7 in the circumferential direction. The four control interfaces can realize stable control of oil pressure, maintenance of working pressure, and stable pressure relief and oil discharge, effectively improving the safety and stability during testing.

[0037] As shown in the drawings, Figure 5 In some embodiments, the upper end of the high-pressure oil inlet joint 106 has two symmetrically arranged joint oil inlet ports 1061, and the lower end of the high-pressure oil inlet joint 106 has a joint oil outlet port 1062 that can communicate with the second common rail pipe 109. The design of two joint oil inlet ports 1061 on the high-pressure oil inlet joint 106 simplifies and efficiently supplies the oil of the high-pressure oil supply system 1.

[0038] In some embodiments, the first pressure sensor 103, the mechanical safety valve 104, and the high-pressure proportional control valve 105 are respectively installed on the first common rail pipe 101 through the tooling 8, the first pressure gauge 107 is installed on the second common rail pipe 109 through the tooling 8, and the low-pressure oil inlet joint 201, the second pressure gauge 202, the second pressure sensor 205, and the low-pressure proportional control valve 203 are respectively installed on the third common rail pipe 204 through the tooling 8. The tooling 8 is installed on the two control oil outlet ports, and the two control oil outlet ports are respectively connected to the two second oil pipes 6 through the two toolings 8.

[0039] As shown in the drawings, Figure 6 , Figure 7 As shown in the drawings, the edge of the tooling 8 is provided with four connecting screw holes 81; the upper surface of the tooling 8 has a boss in the middle and a component mounting through hole 82 is arranged at the center; the component mounting through hole 82 is a stepped hole with an internal thread; and the lower surface of the tooling 8 is provided with a sealing ring mounting groove 83 (for assembling a sealing ring) surrounding the component mounting through hole 82. During installation, the lower surface of the tooling 8 is respectively attached to the corresponding mounting surface of the first common rail pipe 101, the second common rail pipe 109, and the third common rail pipe 204, the component mounting through hole 82 is opposite to the corresponding hole position, and the tooling 8 is fixedly connected to the first common rail pipe 101, the second common rail pipe 109, or the third common rail pipe 204 through four screws respectively penetrating through the four connecting screw holes 81.

[0040] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A common rail device for testing injection valves, comprising a high-pressure oil supply system (1) and a low-pressure control oil system (2), wherein both the high-pressure oil supply system (1) and the low-pressure control oil system (2) are mounted on a connecting bracket (3); characterized in that: The high-pressure oil supply system (1) includes a first common rail (101), a second common rail (109) connected to the first common rail (101) via a first oil pipe (4), a first pressure sensor (103) and a high-pressure proportional control valve (105) installed at intervals on the first common rail (101), and a high-pressure oil inlet connector (106) and a pneumatic shut-off safety valve (108) installed at intervals on the second common rail (109); n injection valve mounting holes are provided at intervals on the first common rail (101), and n injection valves (5) to be tested are respectively installed on the n injection valve mounting holes; The low-pressure control oil system (2) includes a third common rail (204), and a low-pressure oil inlet connector (201), a second pressure sensor (205), and a low-pressure proportional control valve (203) installed at intervals on the third common rail (204); n control oil outlets are spaced apart on the third common rail (204), and the n control oil outlets are respectively connected to the solenoid valves on the n injection valves (5) to be tested through n second oil pipes (6); where n≥2.

2. The common rail device for testing injection valves according to claim 1, characterized in that: A mechanical safety valve (104) is also installed on the first common rail (101).

3. The common rail device for testing injection valves according to claim 2, characterized in that: The second common rail (109) is also equipped with a third pressure sensor (102) and a first pressure gauge (107).

4. The common rail device for testing injection valves according to claim 3, characterized in that: A second pressure gauge (202) is also installed on the third common rail (204).

5. The common rail device for testing injection valves according to any one of claims 1 to 4, characterized in that: The high-pressure proportional control valve (105) has four control interfaces evenly distributed circumferentially on its side wall for connecting the proportional valve (7).

6. The common rail device for testing injection valves according to any one of claims 1 to 4, characterized in that: The upper end of the high-pressure oil inlet connector (106) has two symmetrically arranged connector inlets (1061), and the lower end of the high-pressure oil inlet connector (106) has a connector outlet (1062) that can communicate with the second common rail (109).

7. The common rail device for testing injection valves according to any one of claims 1 to 4, characterized in that: The first common rail (101), the second common rail (109), and the third common rail (204) are arranged in parallel to each other and are all fixedly installed on the connecting bracket (3) by screws.

8. The common rail device for testing injection valves according to claim 4, characterized in that: The first pressure sensor (103), mechanical safety valve (104), and high-pressure proportional control valve (105) are respectively installed on the first common rail (101) through tooling (8), the first pressure gauge (107) is installed on the second common rail (109) through tooling (8), and the low-pressure oil inlet connector (201), the second pressure gauge (202), the second pressure sensor (205), and the low-pressure proportional control valve (203) are respectively installed on the third common rail (204) through tooling (8). Each of the n control oil outlets is equipped with a fixture (8), and the control oil outlets are connected to the second oil pipe (6) through the fixture (8).

9. The common rail device for testing injection valves according to claim 8, characterized in that: The tooling (8) has multiple connecting screw holes (81) on its edge; the upper surface of the tooling (8) has a boss in the middle and a component mounting through hole (82) in the center, which has an internal thread; the lower surface of the tooling (8) has a sealing ring mounting groove (83) surrounding the component mounting through hole (82).

10. The common rail device for testing injection valves according to claim 9, characterized in that: The mounting through hole (82) of the component is a stepped hole.

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