Natural gas engine fuel metering valve leak test tool

Abstract

The utility model relates to a natural gas engine fuel metering valve leakage test tool contains fast insertion adapter joint, pressure reducing valve, valve, connecting pipe, bypass adapter joint, adapter joint, plug, wherein: fast insertion adapter joint is inserted in the front end of pressure reducing valve, the rear end of pressure reducing valve is linked with valve, the both ends of connecting pipe are linked with valve and adapter joint respectively, and the middle part of connecting pipe is inserted with a bypass adapter joint, and the plug is used for installing in the air inlet of fuel metering valve, the utility model discloses make the tool convenient to dismount, improve the versatility of tool, improve the accuracy of tool detection.

Description

Technical Field

[0001] This utility model relates to the technical field of fuel metering valves for natural gas engines, and specifically to a leak testing tool for fuel metering valves of natural gas engines. Background Technology

[0002] Due to the inherent characteristics of fuel metering valve components, failures primarily occur in the injection valve, which has a significant cost difference from the overall assembly. To reduce fuel metering valve liability, a precision repair solution has been implemented, involving component disassembly of the assembly. This requires equipping the service network with fuel metering valve leakage testing tools.

[0003] The shortcomings of existing technology are: The existing service plan only supports the replacement of the fuel metering valve assembly. The fuel metering valve is valuable, resulting in high claims for it. Utility Model Content

[0004] This utility model addresses the above-mentioned problems by providing a natural gas engine fuel metering valve leakage test tool, the purpose of which is to make the tool easy to disassemble and assemble; improve the tool's versatility; and improve the tool's testing accuracy.

[0005] To solve the above problems, the technical solution provided by this utility model is as follows: A leak testing tool for a natural gas engine fuel metering valve includes a quick-connect adapter, a pressure reducing valve, a valve, a connecting pipe, a bypass adapter, an adapter, and a plug, wherein: The quick-connect adapter is inserted into the front end of the pressure reducing valve; the rear end of the pressure reducing valve is connected to the valve; both ends of the connecting pipe are connected to the valve and the adapter, respectively; a bypass adapter is inserted into the middle of the connecting pipe; the plug is used to install in the air inlet of the fuel metering valve.

[0006] Preferably, the quick-connect adapter is a 1 / 4 NPT quick-connect adapter.

[0007] Preferably, the adapter includes a first adapter and a second adapter; the first adapter is used to match the gas connector of the Bosch F01ZF0010J fuel metering valve; the second adapter is used to match the gas connector of the Bosch F01ZF0010N fuel metering valve.

[0008] Preferably, the plug includes a first plug and a second plug; the first plug is used to match the gas connector of the Bosch F01ZF0010J fuel metering valve; the second plug is used to match the gas connector of the Bosch F01ZF0010N fuel metering valve.

[0009] Preferably, the pressure reducing valve is an SMC IR2020-02BG type pressure reducing valve.

[0010] Preferably, the connecting pipe, the quick-connect adapter, the bypass adapter, the adapter, and the plug are all made of 45 steel, and the parts are quenched to HRC38~HRC42 and the surface is bluing treated.

[0011] Compared with the prior art, this utility model has the following advantages: 1. Because this utility model uses a pressure reducing valve, it solves the problem that existing leak tests cannot effectively and conveniently control the compressed air pressure.

[0012] 2. Because this utility model adopts a structure combining a compressed air input device and upper and lower rail gas plugs, it achieves the ability to effectively detect the airtightness of the gas rail's interior and exterior simply by conducting pressure tests on the upper and lower rails separately. Attached Figure Description

[0013] Figure 1 This is a three-dimensional schematic diagram of the testing tool according to a specific embodiment of the present utility model; Figure 2 This is an exploded view of the testing tool according to a specific embodiment of the present invention.

[0014] The components are: 1. Quick-connect adapter, 2. Pressure reducing valve, 3. Valve, 4. Connecting pipe, 5. Bypass adapter, 6. First adapter, 7. Second adapter, 8. First plug, 9. Second plug, A. Adapter, B. Plug Detailed Implementation

[0015] The present invention will be further illustrated below with reference to specific embodiments. It should be understood that these embodiments are only for illustrating the present invention and are not intended to limit the scope of the present invention. After reading the present invention, any modifications of the present invention in various equivalent forms by those skilled in the art will fall within the scope defined by the appended claims.

[0016] This utility model application claims protection for a leak testing tool for a natural gas engine fuel metering valve, such as... Figure 1 , Figure 2 As shown, a natural gas engine fuel metering valve leakage test tool includes a quick-connect adapter 1, a pressure reducing valve 2, a valve 3, a connecting pipe 4, a bypass adapter 5, an adapter A, and a plug B, wherein: The quick-connect adapter 1 is inserted into the front end of the pressure reducing valve 2; the rear end of the pressure reducing valve 2 is connected to the valve 3; both ends of the connecting pipe 4 are connected to the valve 3 and the adapter A respectively; a bypass adapter 5 is inserted into the middle of the connecting pipe 4; the plug B is used to install in the air inlet of the fuel metering valve.

[0017] It should be noted that quick-connect adapter 1 is a 1 / 4 NPT quick-connect adapter.

[0018] It should be noted that adapter A includes a first adapter 6 and a second adapter 7; the first adapter 6 is used to match the gas connector of the Bosch F01ZF0010J fuel metering valve; the second adapter 7 is used to match the gas connector of the Bosch F01ZF0010N fuel metering valve.

[0019] It should be noted that plug B includes a first plug 8 and a second plug 9; the first plug 8 is used to match the gas connector of the Bosch F01ZF0010J fuel metering valve; the second plug 9 is used to match the gas connector of the Bosch F01ZF0010N fuel metering valve.

[0020] It should be noted that pressure reducing valve 2 is an SMC IR2020-02BG type pressure reducing valve.

[0021] It should be noted that the connecting pipe 4, quick-connect adapter 1, bypass adapter 5, adapter A, and plug B are all made of 45 steel, and the parts are hardened to HRC38~HRC42 and have a blued finish.

[0022] It should be noted that, based on the working principle and product characteristics of the fuel metering valve, this utility model of fuel metering valve leakage testing tool was developed, enabling the tool to simultaneously meet the leakage testing requirements of both Z15N and D6.7N engine fuel metering valves.

[0023] It should be noted that this testing tool requires two separate leak tests, one for each test: The steps for Test 1 are as follows: Sa1. First, assemble the quick-connect adapter 1, pressure reducing valve 2, valve 3, connecting pipe 4, bypass adapter 5, first adapter 6 or second adapter 7 (the appropriate adapter needs to be selected according to the model of the fuel metering valve).

[0024] Sa2. Install a pressure gauge at the bypass adapter 5 and connect it to the fuel metering valve inlet at the first adapter 6 or the second adapter 7.

[0025] Sa3. Connect 7 bar compressed air to quick-connect adapter 1, close valve 3, and record the pressure drop over 2 minutes.

[0026] The steps for Test 2 are as follows: Sb1. First, assemble the quick-connect adapter 1, pressure reducing valve 2, valve 3, connecting pipe 4, bypass adapter 5, first adapter 6 or second adapter 7 (the appropriate adapter needs to be selected according to the model of the fuel metering valve).

[0027] Sb2. Install a pressure gauge at the bypass adapter 5 and connect it to the fuel metering valve outlet at the first adapter 6 or the second adapter 7; install the first plug 8 or the second plug 9 at the fuel metering valve inlet.

[0028] Sb3. Connect 7 bar compressed air to quick-connect adapter 1, close valve 3, and record the pressure drop over 2 minutes.

[0029] The condition for determining that the fuel metering valve is leaking is: if the pressure drop of either Test 1 or Test 2 exceeds the limit, then the fuel metering valve is considered to be leaking.

[0030] In the above detailed description, various features are combined together in a single embodiment to simplify this disclosure. This approach to disclosure should not be construed as reflecting an intention that embodiments of the claimed subject matter require more features than are explicitly stated in each claim. Rather, as reflected in the appended claims, the invention is presented with fewer features than all of the features in a single disclosed embodiment. Therefore, the appended claims are hereby explicitly incorporated into the detailed description, with each claim representing a separate preferred embodiment of the invention.

[0031] The disclosed embodiments have been described above to enable any person skilled in the art to implement or use this invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be applied to other embodiments without departing from the spirit and scope of this disclosure. Therefore, this disclosure is not limited to the embodiments given herein, but is consistent with the widest scope of the principles and novel features disclosed in this application.

[0032] The foregoing description includes examples of one or more embodiments. It is certainly impossible to describe all possible combinations of components or methods in order to describe the above embodiments, but those skilled in the art will recognize that further combinations and arrangements of the various embodiments are possible. Therefore, the embodiments described herein are intended to cover all such changes, modifications, and variations that fall within the scope of the appended claims. Furthermore, the term "comprising" as used in the specification or claims is interpreted in a manner similar to the term "including," as interpreted when used as a conjunction in the claims. Additionally, the use of any term "or" in the specification of the claims is intended to mean "non-exclusive or."

[0033] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above description is only a specific embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A leak testing tool for a natural gas engine fuel metering valve, characterized in that: Includes quick-connect adapter (1), pressure reducing valve (2), valve (3), connecting pipe (4), bypass adapter (5), adapter (A), and plug (B), wherein: The quick-connect adapter (1) is inserted into the front end of the pressure reducing valve (2); the rear end of the pressure reducing valve (2) is connected to the valve (3); the two ends of the connecting pipe (4) are connected to the valve (3) and the adapter (A) respectively; a bypass adapter (5) is inserted into the middle of the connecting pipe (4); the plug (B) is used to be installed at the air inlet of the fuel metering valve.

2. The natural gas engine fuel metering valve leakage test tool according to claim 1, characterized in that: The quick-connect adapter (1) is a 1 / 4 NPT quick-connect adapter.

3. The natural gas engine fuel metering valve leakage test tool according to claim 2, characterized in that: The adapter (A) includes a first adapter (6) and a second adapter (7); the first adapter (6) is used to match the gas connector of the Bosch F01ZF0010J fuel metering valve; the second adapter (7) is used to match the gas connector of the Bosch F01ZF0010N fuel metering valve.

4. The natural gas engine fuel metering valve leakage test tool according to claim 3, characterized in that: The plug (B) includes a first plug (8) and a second plug (9); the first plug (8) is used to match the gas connector of the Bosch F01ZF0010J fuel metering valve; the second plug (9) is used to match the gas connector of the Bosch F01ZF0010N fuel metering valve.

5. The natural gas engine fuel metering valve leakage test tool according to claim 4, characterized in that: The pressure reducing valve (2) is an SMC IR2020-02BG type pressure reducing valve.

6. The natural gas engine fuel metering valve leakage test tool according to claim 5, characterized in that: The connecting pipe (4), the quick-connect adapter (1), the bypass adapter (5), the adapter (A), and the plug (B) are all made of 45 steel, and the parts are hardened to HRC38~HRC42 and the surface is bluing treated.

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