Gas valve, engine and generator set

Abstract

The utility model discloses a gas valve, an engine and a generator set. The gas valve comprises a valve body and an electromagnetic valve. The valve body comprises a first cavity and a second cavity. The first cavity is provided with an air inlet, the second cavity is provided with an air outlet, the first cavity and the second cavity are provided with air vents, so that air circulation between the two cavities is achieved, the electromagnetic valve is connected with the valve body, a valve element of the electromagnetic valve can penetrate through the first cavity to block the air vents, and the valve body is further connected with a pressure sensor. The pressure sensor is used for detecting the pressure in the first cavity. The on-off time of the electromagnetic valve can be corrected in real time according to the real-time change of the pressure detected by the pressure sensor, so that the gas amount is accurately controlled, and the whole machine can be smoothly started without power or hands by utilizing the quick response capability of the electromagnetic valve.

Description

Technical Field

[0001] The utility model relates to the technical field of generator set manufacturing, in particular to a gas valve, an engine and a generator set. Background Art

[0002] Most of the existing gas valve bodies adopt a plunger type stepping motor to control the gas volume. Structurally, they adopt an integrated or split structure. This solution has the problems that the sudden load effect is not ideal and the response speed is slow; the idle speed or no-load stability control is poor and the air-fuel ratio fluctuates greatly; the motor loses steps seriously in the small gas volume range. When the fuel is NG or LPG, the generator set cannot achieve a no-power hand start. The reasons are as follows: The disadvantage of the plunger type stepping motor is that every time the system is powered on, it will reset to find the reference. This process takes about 2s. Generally, the normal temperature hand-started engine rotates at 300rpm - 400rpm (the rotation speed is lower at low temperature). In this state, the duration of the voltage output by the monitored power supply module is about 0.5s. During this process, the plunger type stepping motor has not completed the reset action, that is, the gas cannot enter the engine to participate in combustion at this time. Therefore, the no-power hand start cannot be achieved in this state.

[0003] Therefore, it is an urgent task in this field to design a gas valve that does not use a motor to control the gas volume. Summary of the Utility Model

[0004] One of the purposes of the utility model is to provide a gas valve that no longer uses a motor to control the gas volume, but controls the gas flow by the on-off time of an electromagnetic valve.

[0005] The gas valve includes a valve body and an electromagnetic valve; the valve body includes a first chamber and a second chamber; the first chamber is provided with an air inlet, the second chamber is provided with an air outlet, and the first chamber and the second chamber are provided with a ventilation port to enable the gas to flow between the two chambers. The electromagnetic valve is connected to the valve body, and the electromagnetic valve spool can pass through the first chamber to block the ventilation port. A pressure sensor is also connected to the valve body, and the pressure sensor is used to detect the pressure inside the first chamber.

[0006] Adopting the structure of this gas valve, the on-off time of the electromagnetic valve can be corrected in real time according to the real-time change of the pressure detected by the pressure sensor, so as to accurately control the gas volume. Utilizing the fast response ability of the electromagnetic valve, the no-power hand start of the whole machine can be successfully completed. At the same time, the chamber where the air inlet is located is separated from the chamber where the air outlet is located. The first chamber can play a role in stabilizing the pressure and can temporarily store the gas entering from the air inlet to avoid the situation that the gas volume cannot keep up when the engine is suddenly loaded.

[0007] Further, the ventilation port is round, and a metering orifice is arranged at the ventilation port.

[0008] Further, the metering orifice is detachably connected to the ventilation port.

[0009] Further, a quick connector is connected to the air inlet, and an air outlet pipe is connected to the air outlet.

[0010] Further, the first chamber and the second chamber are arranged at intervals.

[0011] Further, the pressure sensor is arranged in the first chamber.

[0012] Further, there is at least one solenoid valve, and the number of solenoid valves is the same as that of the air vent ports.

[0013] In a second aspect, the present utility model further provides an engine, including any one of the above gas valves.

[0014] In a third aspect, the present utility model further provides a generator set, including the above engine, which is driven by the engine to generate electricity.

[0015] Both the above engine and the generator set can achieve no - power manual start when using gas as fuel, and can meet the gas volume demand during sudden loading. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present utility model, the following will briefly introduce the drawings required in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0017] Figure 1 It is a schematic external structure diagram of a gas valve provided by an embodiment of the present utility model;

[0018] Figure 2 It is a schematic internal structure diagram of a gas valve provided by an embodiment of the present utility model;

[0019] Figure 3 It is a schematic connection diagram of a gas valve and a throttle body provided by an embodiment of the present utility model. Reference numerals:

[0020] 1, quick connector; 2, pressure sensor; 3, solenoid valve; 4, valve core; 5, valve body; 6, plug; 7, metering orifice; 8, air outlet pipe; 9, solenoid valve mounting hole; 10, hose; 11, throttle body; 12, first chamber; 13, second chamber. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0022] In order to enable those skilled in the art of this technology to better understand the solution of the present utility model, the present utility model will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0023] The present utility model provides a gas valve, which includes a valve body 5 and a solenoid valve 3; the valve body 5 includes a first chamber and a second chamber; the first chamber is provided with an air inlet, the second chamber is provided with an air outlet, and the first chamber and the second chamber are provided with a ventilation port to enable gas flow between the two chambers. The solenoid valve 3 is connected to the valve body 5. Specifically, the solenoid valve 3 is arranged in the first chamber and the valve core 4 of the solenoid valve 3 can pass through the first chamber to block the ventilation port. A pressure sensor 2 is also connected to the valve body 5. Specifically, the pressure sensor 2 is arranged in the first chamber, and the pressure sensor 2 is used to detect the pressure inside the first chamber.

[0024] With the structure of this gas valve, the on-off time of the solenoid valve 3 can be corrected in real time according to the real-time change of the pressure detected by the pressure sensor 2, so as to accurately control the gas volume. Utilizing the fast response ability of the solenoid valve 3, the engine can be started manually without electricity smoothly. At the same time, the chamber where the air inlet is located is separated from the chamber where the air outlet is located. The first chamber can play a role in stabilizing the pressure and can temporarily store the gas entering from the air inlet to avoid the situation that the gas volume cannot keep up when the engine is suddenly loaded.

[0025] Further, the first chamber and the second chamber are arranged at intervals, the ventilation port is round, and a metering orifice 7 is detachably arranged at the ventilation port. The outer diameter length of the metering orifice 7 is equal to or slightly smaller than the diameter length of the ventilation port. The inner diameter size specification can be determined according to the gas demand of the whole machine. The length of its inner diameter determines the amount of gas discharged by the gas valve per unit time. The metering orifice 7 and the valve body 5 can be integrally formed, or can be fixed by welding. More preferably, the metering orifice 7 is detachably connected to the ventilation port. Optionally, threaded connection or clamping can be adopted. The detachable connection method belongs to the mature technology in this field, and its implementation method will not be elaborated here. This enables the gas valve to be flexibly and accurately applied to the fine adjustment requirements of engine intake after being manufactured, or can be applied to a new model only by replacing the metering orifice 7, reducing the maintenance and replacement costs.

[0026] Further, a quick connector 1 is connected to the air inlet, which facilitates assembly and connection to other components. An air outlet pipe 8 is connected to the air outlet, and the air outlet pipe 8 is used to transmit gas to the throttle body 11. Specifically, the air outlet pipe 8 is connected to a hose 10, and the hose 10 then transmits the gas to the throttle body 11.

[0027] The number of solenoid valves 3 and the number of orifices 7 can be determined according to the demand for the displacement of the gas valve per unit time. Preferably, the numbers of both are the same. In one embodiment, the gas valve is provided with two solenoid valves 3 and two orifices 7, and a plurality of plugs 6 are also provided. The plugs 6 are used to block the redundant processing ports or air ports on the valve body 5 to prevent gas leakage, and the processing ports or air ports can be enabled when needed. At the same time, solenoid valve mounting holes 9 and sensor mounting holes (not shown in the figure) are provided on the valve body 5. Bolts pass through the solenoid valve mounting holes 9 and are threadedly connected to the solenoid valves 3, thereby realizing the installation and fixation of the solenoid valves 3 on the valve body 5. Threads are provided in the sensor mounting holes, and bolts pass through the holes provided on the pressure sensor 2 and are threadedly connected to the threads in the sensor mounting holes.

[0028] In a second aspect, the present utility model also provides an engine including any of the above gas valves.

[0029] In a third aspect, the present utility model also provides a generator set including the above engine, which is driven by the engine to generate electricity. Both the above engine and the generator set can achieve a non-electric hand start when using gas as fuel and can meet the gas volume demand during sudden loading.

[0030] In this specification, the various embodiments are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. The same or similar parts among the various embodiments can be referred to each other. For the devices disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple, and the relevant parts can be referred to the description of the method part. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of the present utility model, several improvements and modifications can be made to the present utility model, and these improvements and modifications also fall within the protection scope of the present utility model.

[0031] It should also be noted that in this specification, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the existence of additional identical elements in the process, method, article or device comprising the element. The terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device, component or structure referred to must have a specific orientation, be constructed or operated in a specific orientation, and should not be construed as a limitation on the present utility model.

Claims

1. A gas valve, comprising a valve body and an electromagnetic valve, characterized in that: The valve body includes a first chamber and a second chamber; an air inlet is provided in the first chamber, an air outlet is provided in the second chamber, and a ventilation port is provided between the first chamber and the second chamber to enable gas flow between the two chambers. The solenoid valve is connected to the valve body, and the solenoid valve spool can pass through the first chamber to block the ventilation port. A pressure sensor is also connected to the valve body, and the pressure sensor is used to detect the pressure inside the first chamber.

2. The gas valve according to claim 1, wherein: The ventilation port is circular, and a metering orifice is provided at the ventilation port.

3. The gas valve according to claim 2, characterized in that: The metering orifice is detachably connected to the ventilation port.

4. The gas valve according to claim 1, characterized in that: A quick connector is connected to the air inlet, and an outlet pipe is connected to the air outlet.

5. The gas valve according to claim 1, characterized in that: The first chamber and the second chamber are spaced apart.

6. The gas valve according to claim 1, wherein: The pressure sensor is disposed in the first chamber.

7. The gas valve according to claim 1, characterized in that: There is at least one solenoid valve, and the number of solenoid valves is the same as the number of ventilation ports.

8. An engine, characterized in that It includes a gas valve according to any one of claims 1-7.

9. A generator set, characterized in that, It includes an engine according to claim 8, and power generation is driven by the engine.

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