A pressure accumulator gas injection valve

Abstract

The present invention relates to the technical field of gas engines and dual-fuel engine components, and in particular to a pressure-accumulating gas injection valve comprising a nozzle, a housing, and a terminal block, wherein the nozzle is disposed at the lower end of the housing, the terminal block being fixedly connected to the upper side of the housing, a nozzle core being sleeved within the nozzle, a regulating valve assembly being disposed above the nozzle core, an armature assembly being threadedly connected to the regulating valve assembly, a solenoid valve assembly being disposed above the armature assembly, the solenoid valve assembly being cooperatively mounted with the housing, the solenoid valve assembly being electrically connected to the terminal block, a first air inlet being provided through the upper end of the housing, and a second air inlet being provided through the solenoid valve assembly at a position corresponding to the first air inlet. The present invention has the advantages of improved reliability, fast response speed, wide applicability, and high structural integration.

Description

Technical Field

[0001] The present invention relates to the technical field of gas engines and dual-fuel engine components, and in particular to a pressure-accumulating gas injection valve. Background Art

[0002] To achieve the country's "dual carbon" strategy, natural gas, ammonia, and hydrogen have become new fuel options for engines. Some developed countries have experienced decades of development in engine gas technology, with electronically controlled multi-point gas injection technology emerging as a mature technology due to its fast response speed and high control precision. Currently, domestic marine gas engines and dual-fuel engines mostly utilize imported gas injection valves and controllers, while domestically produced gas injection systems struggle to gain market share due to poor performance and reliability.

[0003] To this end, a pressure accumulator gas injection valve is proposed, which has the advantages of better reliability, faster response speed, wider application range and high structural integration, and is used to accelerate the localization process of my country's medium and high speed gas injection system. Summary of the Invention

[0004] The object of the present invention is to provide a pressure-accumulating gas injection valve having the advantages of better reliability, faster response speed, wider application range and high structural integration.

[0005] In order to achieve the above object, the technical solution of the present invention is as follows:

[0006] 20. The inflatable gas injector as claimed in claim 19, wherein the air filter is mounted on a linking member which is located adjacent the air filter housing and the air filter housing, and the air filter housing is located adjacent the air filter housing, wherein the air filter housing is located adjacent the air filter housing, and the air filter housing is located adjacent the air filter housing.

[0007] Specifically, an O-ring is provided at the connection between the nozzle and the housing.

[0008] Specifically, an O-ring is further provided on the circumference of the nozzle.

[0009] Specifically, a pressure storage chamber is further provided inside the shell, and the pressure storage chamber is arranged above the nozzle core. A penetrating spray hole is opened at the position of the nozzle core corresponding to the second air inlet hole, and a penetrating air outlet hole is opened at the position of the nozzle corresponding to the spray hole. The lower end surface of the nozzle core abuts the upper end surface of the air outlet hole, and a boss is provided on the top of the nozzle core.

[0010] Specifically, the regulating valve assembly includes a valve plate, a spring plate, a gasket and an air guide plate. The lower end face of the valve plate abuts the upper end face of the boss. The upper end of the valve plate is sequentially installed with a spring plate, a gasket and an armature assembly. The valve plate and the armature assembly are threadedly connected. The lower end face of the spring plate abuts the upper end face of the nozzle. The upper end face of the spring plate abuts the air guide plate and the gasket. The upper end of the air guide plate is respectively installed in cooperation with the housing and the solenoid valve assembly.

[0011] Specifically, the air guide plate is provided with a plurality of air guide holes.

[0012] Specifically, the armature assembly includes an armature, the lower end surface of the armature abuts against the gasket, the lower end of the armature is provided with a pressure storage groove, the upper end of the armature is provided with an air guide groove and a first spring groove, and the number and position of the air guide grooves correspond one-to-one to the number and position of the air guide holes.

[0013] Specifically, it further includes a spring, the lower end of the spring is installed in cooperation with the first spring groove.

[0014] Specifically, a second spring groove is provided at the lower end of the solenoid valve assembly, and the upper end of the spring is mounted in cooperation with the second spring groove.

[0015] The beneficial effects of the present invention are:

[0016] (1) The present invention can encapsulate the corresponding nozzle core according to the flow rate requirement range of the actual engine to adjust the size of the spray hole, and has a wide range of applications;

[0017] (2) The present invention provides a pressure accumulation chamber and a boss. When the gas injection valve is closed, the gas can be pressurized around the boss, and part of the gas pressure is applied to the lower end of the valve plate and the pressure accumulation groove, thereby providing sufficient initial pressure when the gas injection valve is opened. This can improve the response speed, avoid excessive demands on the electromagnetic force of the solenoid valve assembly, and reduce the difficulty of developing the solenoid valve assembly.

[0018] (3) The present invention adopts an integrated valve disc design, integrating the traditional valve disc-screw structure into the valve disc of the present invention with multiple functions of sealing, connection, and movement, thereby simplifying the structure and saving space; the lower end of the valve disc abuts against the upper end surface of the boss to achieve a sealing effect, and the upper end is fixed to the armature by a thread and reciprocates with the armature;

[0019] (4) The present invention reduces air intake throttling by providing air guide grooves and air guide holes, and can reduce resistance during the ascending process of the armature assembly, thereby improving the response speed;

[0020] (5) The present invention provides a spring and a spring sheet, and the synergistic effect between the two provides a double reset and double limit function, thereby greatly improving the reliability of the gas injection valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a cross-sectional view of an embodiment of the present invention;

[0022] Figure 2 This is a schematic structural diagram of an armature assembly according to an embodiment of the present invention;

[0023] Figure 3 Schematic diagram of the structure of the solenoid valve assembly according to an embodiment of the present invention.

[0024] Figure markings: nozzle 1, nozzle core 2, spray hole 201, boss 202, valve plate 3, armature 4, solenoid valve assembly 5, housing 6, terminal block 7, spring 8, air guide plate 9, gasket 10, spring plate 11, O-ring 12, pressure accumulation chamber 102, air outlet 101, air guide hole 901, pressure accumulation groove 401, air guide groove 402, first spring groove 403, second spring groove 502, second air inlet hole 501, first air inlet hole 601. DETAILED DESCRIPTION

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0026] Reference Attachment Figure 1-3A pressure accumulator gas injection valve includes a nozzle 1, a housing 6 and a terminal block 7. The nozzle 1 is arranged at the lower end of the housing 6, and the terminal block 7 is fixed to the upper end of the side of the housing 6. The nozzle 1 is sleeved with a nozzle core 2. A regulating valve assembly is provided above the nozzle core 2. An armature assembly is threadedly connected to the regulating valve assembly. A solenoid valve assembly 5 is provided above the armature assembly. The solenoid valve assembly 5 is fitted with the housing 6. The solenoid valve assembly 5 is electrically connected to the terminal block 7. The armature assembly matches the solenoid valve assembly 5. When the terminal block 7 energizes the solenoid valve assembly 5, the armature assembly is subjected to an upward magnetic attraction, driving the control valve assembly to move upward, and the control valve assembly releases the gas when it is in the open position. When the terminal block 7 cuts off the power to the solenoid valve assembly 5, the armature assembly loses the magnetic attraction, the armature assembly and the control valve assembly move downward, and the control valve assembly blocks the gas from flowing out when it is in the closed position, ending the gas injection. A first air inlet hole 601 is provided through the upper end of the shell 6, and a second air inlet hole 501 is provided through the solenoid valve assembly 5 at a position corresponding to the first air inlet hole 601.

[0027] Specifically, an O-ring 12 is further provided at the connection between the nozzle 1 and the housing 6 .

[0028] Furthermore, the pressure-accumulating gas injection valve involved in the present invention is packaged using a rolling process. Before the packaging step, the various parts involved in the pressure-accumulating gas injection valve are assembled in sequence, and then packaged into an integrated structure using the rolling process. In this process, the corresponding nozzle core 2 can be replaced before packaging according to the actual flow requirement range of the engine, thereby adjusting the size of the spray hole 201, and the applicability is wide; in addition, an O-ring 12 is provided at the connection between the nozzle 1 and the housing 6, which can improve the sealing performance of the connection between the nozzle 1 and the housing 6, and the provision of an O-ring 12 at the connection between the nozzle 1 and the housing 6 is a prior art. The present invention aims to improve the structural features of the pressure-accumulating gas injection valve.

[0029] Specifically, an O-ring 12 is further provided on the circumference of the nozzle 1 .

[0030] Furthermore, an O-ring 12 is provided on the circumference of the nozzle 1 of the present invention to ensure sealing.

[0031] Specifically, a pressure storage chamber 102 is further provided inside the shell 6, and the pressure storage chamber 102 is arranged above the nozzle core 2. The nozzle core 2 is provided with a penetrating spray hole 201 at a position corresponding to the second air inlet 501, and the nozzle 1 is provided with a penetrating air outlet 101 at a position corresponding to the spray hole 201. The lower end surface of the nozzle core 2 is in contact with the upper end surface of the air outlet 101, and a boss 202 is provided on the top of the nozzle core 2.

[0032] Furthermore, the positions of the first air inlet 601 , the second air inlet 501 , the spray hole 201 and the air outlet 101 of the present invention correspond one to one.

[0033] Furthermore, the pressure storage chamber 102, the boss 202 and the pressure storage groove 401 involved in the present invention cooperate with each other, wherein the pressure storage chamber 102 and the boss 202 are used in cooperation. When the gas injection valve is closed, the gas can be pressurized around the boss 202, and part of the gas pressure is applied to the lower end of the valve plate 3 and the pressure storage groove 401, thereby providing sufficient initial pressure when the gas injection valve is opened, which can improve the response speed, avoid excessive demand on the electromagnetic force of the solenoid valve assembly 5, and reduce the difficulty of developing the solenoid valve assembly 5.

[0034] Specifically, the regulating valve assembly includes a valve plate 3, a spring plate 11, a gasket 10 and an air guide plate 9. The lower end face of the valve plate 3 abuts the upper end face of the boss 202. The upper end of the valve plate 3 is sequentially installed with the spring plate 11, the gasket 10 and the armature assembly. The valve plate 3 and the armature assembly are threadedly connected. The lower end face of the spring plate 11 abuts the upper end face of the nozzle 1. The upper end face of the spring plate 11 abuts the air guide plate 9 and the gasket 10. The upper end of the air guide plate 9 is respectively installed in cooperation with the housing 6 and the solenoid valve assembly 5.

[0035] Furthermore, the regulating valve assembly involved in the present invention is composed of a valve plate 3, a spring plate 11, a gasket 10 and an air guide plate 9. It adopts an integrated valve plate design, and integrates the traditional valve plate-screw structure into the valve plate of the present invention with multiple functions of sealing, connection, and movement, thereby simplifying the structure and saving space; the lower end of the valve plate abuts against the upper end face of the boss to achieve a sealing effect, and the upper end is fixed to the armature by a thread, and reciprocates with the armature.

[0036] Furthermore, the lower end surface of the valve plate 3 of the present invention abuts against the upper end surface of the boss 202, which can play a sealing role, and the valve plate 3 is threadedly connected to the armature assembly and can move up and down with the armature assembly.

[0037] Specifically, the air guide plate 9 is provided with a plurality of air guide holes 901; the armature assembly includes an armature 4, the lower end surface of the armature 4 is in contact with the gasket 10, the lower end of the armature 4 is provided with a pressure storage groove 401, and the upper end of the armature 4 is provided with an air guide groove 402 and a first spring groove 403, and the number and position of the air guide grooves 402 correspond one-to-one to the number and position of the air guide holes 901.

[0038] Furthermore, the number and position of the air guide grooves 402 involved in the present invention correspond one-to-one with the number and position of the air guide holes 901, which can reduce the intake throttling effect and reduce the resistance during the rising process of the armature assembly, thereby improving the response speed.

[0039] Specifically, it also includes a spring 8, the lower end of which is mounted in cooperation with the first spring groove 403; the lower end of the solenoid valve assembly 5 is provided with a second spring groove 502, and the upper end of the spring 8 is mounted in cooperation with the second spring groove 502.

[0040] Furthermore, the spring 8 and the spring sheet 11 of the present invention cooperate with each other to provide double reset and double limit functions, thereby greatly improving the reliability of the gas injection valve.

[0041] The working process of the present invention is as follows: during use, when the terminal block 7 energizes the solenoid valve assembly 5, the armature 4 is subjected to an upward magnetic attraction, driving the valve plate 3 to move upward together. At this time, the spray hole 201 between the valve plate 3 and the boss 202 is opened, and the gas flows out; when the terminal block 7 cuts off the power to the solenoid valve assembly 5, the armature 4 loses the magnetic attraction, and the armature 4 and the valve plate 3 move downward under the joint action of the spring 8 and the spring plate 11. At this time, the spray hole 201 is closed, and the gas injection ends.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not limiting. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the purpose and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A pressure accumulator gas injection valve, comprising a nozzle, a housing and a terminal block, characterized in that: The cam is secured to the upper portion of the housing and secured to the lower portion of the housing, the cam being secured to the cam face and being capable of activating actuation of the control valve when the valve is in the closed position. The nozzle core is placed above the nozzle core, and a penetrating spray hole is opened at the position corresponding to the second air inlet of the nozzle core, and a penetrating air outlet is opened at the position corresponding to the spray hole of the nozzle. The lower end surface of the nozzle core abuts the upper end surface of the air outlet, and a boss is provided on the top of the nozzle core. The regulating valve assembly includes a valve plate, a spring plate, a gasket and an air guide plate. The lower end surface of the valve plate abuts the upper end surface of the boss, and the upper end of the valve plate is sequentially installed with a spring plate, a gasket and an armature assembly, and there is a gap between the valve plate and the armature assembly. Threaded connection, the lower end surface of the spring sheet abuts against the upper end surface of the nozzle, the upper end surface of the spring sheet abuts against the air guide plate and the gasket, the upper end of the air guide plate is respectively installed in conjunction with the housing and the solenoid valve assembly, a plurality of air guide holes are provided on the air guide plate, the armature assembly includes an armature, the lower end surface of the armature abuts against the gasket, the lower end of the armature is provided with a pressure accumulation groove, the upper end of the armature is provided with an air guide groove and a first spring groove, the number and position of the air guide grooves correspond one to one with the number and position of the air guide holes.

2. A pressure accumulator gas injection valve according to claim 1, characterized in that: An O-shaped sealing ring is also provided at the connection between the nozzle and the housing.

3. The pressure accumulator gas injection valve according to claim 1, characterized in that: An O-shaped sealing ring is also provided on the circumference of the nozzle.

4. A pressure accumulator gas injection valve according to claim 3, characterized in that: It also includes a spring, the lower end of which is fitted in cooperation with the first spring slot.

5. The pressure accumulator gas injection valve according to claim 4, characterized in that: The lower end of the solenoid valve assembly is provided with a second spring groove, and the upper end of the spring is mounted in cooperation with the second spring groove.

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