Gas injection valve static flow test tool

Abstract

The utility model aims to provide a gas injection valve static flow test tool, which comprises a shell, a gas inlet and a gas outlet, and is characterized in that a cavity with one open end is formed in the shell, and the shell is provided with a gas inlet and a gas outlet which are communicated with the cavity; a to-be-tested valve seat, a to-be-tested valve plate, a gasket and a range limiting disc are sequentially arranged in a cavity of the shell from inside to outside; the gland is arranged at the open end of the shell and is used for pressing the range limiting disc, so that a part of the lower end surface of the range limiting disc is pressed with a part of the upper end surface of the valve seat to be tested; different lifts of the gas injection valve are simulated by adjusting the thickness of the gasket. The static flow measuring device can be used for measuring the static flow corresponding to each lift of the gas injection valve under a series of pressure differences.

Description

Technical Field

[0001] This utility model relates to components of gas engines and dual-fuel engines, specifically a static flow test fixture for a gas injection valve. Background Technology

[0002] Gas injection valves are used in marine new energy engines, primarily in LNG dual-fuel engines. They employ intake manifold injection to inject gas into the cylinders at precise times and quantities to mix and burn with diesel fuel, achieving a gas substitution rate of over 90%. These valves must ensure consistent gas injection across all engine cylinders. If an abnormal exhaust temperature occurs in any cylinder, the system automatically exits dual-fuel mode, rendering LNG unusable for powering the vessel. The consistency of gas injection quantity is a crucial indicator of a gas injection valve's performance; theoretically, it should be ≤±3%. Therefore, it is necessary to develop and design a convenient device or tooling for measuring the gas injection valve's flow rate. Utility Model Content

[0003] The purpose of this invention is to provide a static flow testing fixture for a gas injection valve.

[0004] The purpose of this utility model is achieved as follows:

[0005] A static flow test fixture for a gas injection valve includes:

[0006] The housing has an open cavity at one end, and the housing is provided with an air inlet and an air outlet communicating with the cavity.

[0007] The test valve seat, test valve plate, gasket and limit plate are arranged sequentially from the inside to the outside of the cavity of the housing;

[0008] A pressure cap is arranged at the open end of the housing, the pressure cap being used to press the limiting disc so that a portion of the lower end face of the limiting disc is pressed against a portion of the upper end face of the valve seat to be tested;

[0009] By adjusting the thickness of the gasket, different lifts of the gas injection valve can be simulated.

[0010] Preferably, a fixing block is mounted on the limiting disk;

[0011] By connecting the valve plate to the fixing block with a connecting screw that passes through the valve plate, the upper end face of the valve plate is made to fit tightly against part of the lower end face of the limit plate.

[0012] Preferably, a seal is formed between the valve seat and the housing by a first sealing ring.

[0013] Preferably, the gland portion extends into the cavity of the housing and forms a seal with the housing through the second sealing ring.

[0014] Preferably, the gland is fixed to the housing by fastening screws.

[0015] The advantages of this utility model are:

[0016] 1. This utility model has a simple structure, is easy to process, and can be easily modified to be applicable to the static flow measurement of various gas injection valves.

[0017] 2. This structure is low in cost, highly feasible, easy to operate, and can be easily adjusted according to needs. Attached Figure Description

[0018] Figure 1 This is a cross-sectional view of the static flow test fixture for the gas injection valve in this embodiment of the present invention;

[0019] Figure 2 This is a top view of the static flow test fixture for the gas injection valve in an embodiment of this utility model. Detailed Implementation

[0020] The present invention will now be described in detail with reference to the accompanying drawings.

[0021] like Figure 1 and Figure 2 As shown in the embodiment of this application, a static flow test fixture for a gas injection valve is provided, which consists of a pressure cap 1, a housing 2, a valve seat to be tested 3, a first sealing ring 4, a connecting screw 5, a valve plate to be tested 6, a limit disc 7, a second sealing ring 8, a fixing block 9, and a fastening screw 10.

[0022] Among them, the valve seat 3 and the valve plate 6 under test are structures that are completely consistent with the valve seat and valve plate structure on the gas injection valve under test, or in other words, valve seat and valve plate removed from the gas injection valve under test.

[0023] like Figure 1 The housing has an open cavity at one end. The housing 2 is provided with an air outlet 201 and an air inlet 202, both of which are connected to the cavity. The air inlet 202 can be connected to a pressure regulating valve or other equipment, and the air outlet 201 can be connected to a flow meter or other equipment.

[0024] like Figure 1 The valve seat 3 to be tested is fixed at the lower end of the cavity of the housing 2 and is sealed to the housing 2 by the first sealing ring 4.

[0025] like Figure 1 The valve plate 6 to be tested is placed on the valve seat 3 to be tested, and the valve plate 6 to be tested and the valve seat 3 to be tested are sealed by a ring belt.

[0026] like Figure 1The limiting disc 7 is placed above the valve plate 6 to be tested. Part of the pressure cover 1 extends into the cavity of the housing 2 to press the limiting disc 7, so that the lower end face of the limiting disc 7 is in contact with the upper end face of the valve seat 3 to be tested, and the lower end face of part of the limiting disc 7 is in contact with the upper end face of the valve plate 6 to be tested.

[0027] After the limiting disc 7 is installed in the housing 2, the air inlet 202 between the two has an annular cavity that facilitates gas flow and balances air pressure. The limiting disc 7 has a three-jaw or multi-jaw structure, which is used to press against the valve seat 3 to be tested while allowing space for gas flow.

[0028] Reference Figure 1 and Figure 2 The pressure cap 1 is sealed to the housing 2 by the second sealing ring 8 and fixed to the housing 2 by the fastening screw 10. The first sealing ring 4 and the second sealing ring 8 are used to seal the upper and lower ends of the tooling interior, respectively.

[0029] Reference Figure 1 The upper end face of the valve plate 6 to be tested is fixed to the lower end face inside the limit plate 7 by connecting screws 5 and fixing blocks 9.

[0030] Reference Figure 1 A fixed lift is formed between the lower end face of the valve plate 6 to be tested and the lower end face of the limit plate 7; at the same time, shims can be added or removed between the upper end face of the valve plate 6 and the limit plate 7, and the thickness of the shims can be adjusted to flexibly control the lift between the valve plate 6 to be tested and the valve seat 3 to be tested within a certain range.

[0031] When testing the gas injection valve at each stroke using the static flow test fixture in this embodiment, the inlet 202 is connected to the pressure regulating valve and the inlet pressure is set at the pressure regulating valve. The specific stroke adjustment between the lower end face of the valve plate 6 and the lower end face of the limit plate 7 is achieved by adjusting the thickness of the gasket between the valve plate 6 and the limit plate 7. The outlet 201 is connected to the flow meter and compressed air is introduced, so that the static flow corresponding to each stroke of the gas injection valve under a series of pressure differences can be measured.

[0032] This utility model has a simple structure and is easy to manufacture. With simple modifications, it can be applied to the static flow measurement of various gas injection valves. At the same time, the structure is inexpensive, highly feasible, easy to operate, and can be easily adjusted according to needs.

[0033] The above descriptions are merely embodiments of this utility model. Commonly known structures and characteristics are not described in detail here. Those skilled in the art are aware of all common technical knowledge in the field prior to the application date or priority date, are knowledgeable of all existing technologies in that field, and possess the ability to apply conventional experimental methods prior to that date. Therefore, those skilled in the art can, based on the guidance provided in this application, improve and implement this solution in conjunction with their own capabilities. Typical known structures or methods should not be obstacles for those skilled in the art to implement this application. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A static flow testing fixture for a gas injection valve, characterized in that, include: The housing has an open cavity at one end, and the housing is provided with an air inlet and an air outlet communicating with the cavity. The test valve seat, test valve plate, gasket and limit plate are arranged sequentially from the inside to the outside of the cavity of the housing; A pressure cap is arranged at the open end of the housing, the pressure cap being used to press the limiting disc so that a portion of the lower end face of the limiting disc is pressed against a portion of the upper end face of the valve seat to be tested; By adjusting the thickness of the gasket, different lifts of the gas injection valve can be simulated.

2. The static flow test fixture for the gas injection valve according to claim 1, characterized in that, The limiting plate is equipped with a fixing block; By connecting the valve plate to the fixing block with a connecting screw that passes through the valve plate, the upper end face of the valve plate is made to fit tightly against part of the lower end face of the limit plate.

3. The static flow test fixture for the gas injection valve according to claim 1, characterized in that, A seal is formed between the valve seat and the housing by a first sealing ring.

4. The static flow test fixture for the gas injection valve according to claim 1, characterized in that, The gland portion extends into the cavity of the housing and forms a seal with the housing through the second sealing ring.

5. The static flow test fixture for the gas injection valve according to claim 1, characterized in that, The gland is secured to the housing by fastening screws.

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