Fuel gas control nozzle, control method thereof and natural gas engine

Abstract

The invention provides a fuel gas control nozzle, a control method thereof and a natural gas engine and relates to the technical field of engines, a fuel gas channel is formed in the middle of a nozzle shell, fuel gas enters the fuel gas channel from a nozzle gas inlet and sequentially flows through a driving part, a valve body and a sealing ridge, and the driving end of the driving part is connected with the valve body; the valve body vertically slides along the guide part; the valve body comprises a plurality of valve seats which take the gas channel as a shaft and are sleeved in sequence; the driving part drives the target number of valve seats to move towards one end of the gas inlet of the nozzle, so that the via holes corresponding to the target number of valve seats are communicated with the gas channel, the via holes are formed in the sealing ridge and located between the sealing rings, and the target number of valve seats are the target number of valve seats from one side of the gas channel to the outer side of the gas channel. Therefore, under the low-temperature condition, more through holes can be conducted, so that the jet flow of the nozzle is increased, ice slag blocking a gas pipeline is reduced, and the risk that a natural gas engine is difficult to start under the low-temperature environment is reduced.

Description

Technical Field

[0001] The present application relates to the field of engine technology, and in particular to a gas control nozzle and a control method thereof, and a natural gas engine. Background Art

[0002] When natural gas engines are started at low temperatures or are operating, ice easily forms in the gas pipeline, causing problems such as difficulty in starting.

[0003] At present, when faced with the problem of ice debris blocking the starting of a natural gas engine in a low-temperature environment, hot water is used to melt the ice, but additional hot water is required and the operation is cumbersome; or, a high-frequency nozzle drive is used to de-ice, but frequent nozzle drive can easily cause nozzle damage and the low-temperature starting effect is not significant. Summary of the invention

[0004] In view of this, the present application provides a gas control nozzle and a control method thereof, and a natural gas engine, aiming to solve the problem of difficulty in starting the natural gas engine due to ice blocking the gas pipeline.

[0005] In a first aspect, the present application provides a gas control nozzle, comprising a nozzle housing and a guide portion;

[0006] The middle part of the nozzle housing is a gas channel, and the gas enters the gas channel from the nozzle air inlet and flows through the driving member, the valve body and the sealing ridge in sequence. The driving end of the driving member is connected to the valve body, and the valve body slides vertically along the guide part;

[0007] The valve body comprises a plurality of valve seats which are sleeved in sequence with the gas passage as the axis;

[0008] The sealing ridge includes a plurality of sealing rings protruding toward one side of the valve body with the gas channel as the axis;

[0009] The driving member drives the target number of valve seats to move toward one end of the nozzle air inlet, so that the via holes corresponding to the target number of valve seats are connected to the gas channel, the via holes are arranged on the sealing ridge and located between the sealing rings, and the target number of valve seats are the target number of valve seats from one side of the gas channel to the outside.

[0010] Optionally, the driving member includes a static iron core and a coil;

[0011] The static iron core is extended outwardly from one end close to the nozzle air inlet to the inner wall of the nozzle housing to form a limiting portion; the coil is arranged between the limiting portion and the guide portion, and is sleeved on the outside of the static iron core; the middle part of the static iron core is a gas channel;

[0012] The valve seat is connected to the static iron core through a spring.

[0013] Optionally, the elastic force of the springs connected to the multiple valve seats increases sequentially from one side of the gas channel to the outside.

[0014] Optionally, a sealing housing is sealedly connected to one end of the nozzle housing close to the nozzle air outlet, and the inner side wall of the sealing housing is in contact with the outer side wall of the sealing ridge;

[0015] One end of the sealing shell close to the valve seat extends inward to form the guide portion.

[0016] Optionally, a spray hole plate is installed between the sealing ridge and the nozzle air outlet;

[0017] The outermost through hole included in the sealing ridge corresponds to the inner side of the inner wall of the orifice plate;

[0018] An outer wall of the orifice plate is provided with a mounting ring protruding outwardly at one end adjacent to the sealing ridge;

[0019] The sealing ridge extends downward to the mounting ring at an edge of one side close to the orifice plate to form a mounting portion, and the inner side wall of the mounting portion is in contact with the outer side wall of the orifice plate.

[0020] Optionally, the valve body comprises a primary valve seat and a secondary valve seat, the secondary valve seat is sleeved on the outside of the primary valve seat, the middle of the primary valve seat is a gas channel, and a guide portion is provided on the outside of the secondary valve seat;

[0021] The sealing ring comprises a first sealing ring, a second sealing ring and a third sealing ring which are arranged outward in sequence with the gas channel as the axis, and a first through hole is arranged between the first sealing ring and the second sealing ring on the sealing ridge; a second through hole is arranged between the second sealing ring and the third sealing ring on the sealing ridge.

[0022] Optionally, a temperature sensor and a controller are also included;

[0023] The signal output end of the temperature sensor is connected to the controller; the controller is connected to the coil; the controller is used to apply corresponding current values ​​to the coil according to different temperature values ​​fed back by the temperature sensor.

[0024] In a second aspect, the present application further provides a method for controlling a gas control nozzle, which is applied to a gas control nozzle as described in any one of the above, and the method comprises:

[0025] If the ambient temperature is not less than the temperature threshold, controlling the driver to drive the first target number of valve seats to move toward the nozzle air inlet, so that the via holes corresponding to the first target number of valve seats are opened and communicated with the gas channel;

[0026] If the ambient temperature is lower than the temperature threshold, the driver is controlled to drive the second target number of valve seats to move toward the nozzle air inlet, so that the vias corresponding to the second target number of valve seats are opened and connected to the gas channel; the second target number is greater than the first target number.

[0027] Optionally, controlling the driver to drive a first target number of valve seats to move toward the nozzle air inlet includes: applying a first current value to the coil so that the static iron core attracts the first target number of valve seats to move toward the nozzle air inlet;

[0028] The controlling the driver to drive the second target number of valve seats to move toward the nozzle air inlet includes: applying a second current value to the coil so that the static iron core attracts the second target number of valve seats to move toward the nozzle air inlet;

[0029] The second current value is greater than the first current value.

[0030] In a third aspect, the present application also provides a natural gas engine, which adopts a gas control nozzle as described in any one of the above items.

[0031] The present application provides a gas control nozzle and a control method thereof, and a natural gas engine, including a nozzle housing and a guide portion; the middle portion of the nozzle housing is a gas channel, the gas enters the gas channel from the nozzle air inlet and flows through a drive member, a valve body and a sealing ridge in sequence, the drive end of the drive member is connected to the valve body, and the valve body slides vertically along the guide portion; the valve body includes a plurality of valve seats that are sequentially sleeved with the gas channel as the axis; the drive member drives a target number of valve seats to move toward one end of the nozzle air inlet, so that the via holes corresponding to the target number of valve seats are connected to the gas channel, the via holes are arranged on the sealing ridge and are located between the sealing rings, and the target number of valve seats are the target number of valve seats from one side of the gas channel to the outside. In this way, in low temperature conditions, more via holes corresponding to the valve seats can be connected to the gas channel, and more via holes can be connected, thereby increasing the nozzle injection flow, thereby reducing ice chips that block the gas pipeline, and reducing the risk of difficulty in starting the natural gas engine in a low temperature environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in this embodiment or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0033] Figure 1 A schematic diagram of the outer structure of a gas nozzle provided in an embodiment of the present application;

[0034] Figure 2 A schematic diagram of the internal structure of a gas control nozzle provided in an embodiment of the present application;

[0035] Figure 3 A flow chart of a method for controlling a gas control nozzle provided in an embodiment of the present application;

[0036] Figure 4 A schematic diagram of the cooperation between a valve body and a sealing ridge provided in an embodiment of the present application;

[0037] Figure 5 A schematic diagram of the cooperation between another valve body and a sealing ridge provided in an embodiment of the present application.

[0038] Description of Figure Numbers

[0039] 1-nozzle air inlet; 2-wiring connector; 3-sealing ring; 4-injection molding housing; 41-nozzle housing; 42-sealing housing; 5-nozzle air outlet; 6-static iron core; 7-coil; 8-secondary spring; 9-sealing ridge; 10-primary spring; 11-primary valve seat; 12-secondary valve seat; 13-spray hole plate. DETAILED DESCRIPTION

[0040] When faced with the problem of ice debris blocking the starting of a natural gas engine in a low-temperature environment, using hot water to melt the ice requires additional hot water and is cumbersome to operate; using a high-frequency driven nozzle to de-ice can easily cause damage to the nozzle and the low-temperature starting effect is not significant.

[0041] Based on the above problems, the present application provides a gas control nozzle, see Figure 1 The schematic diagram of the outer structure of a gas nozzle is shown, wherein a nozzle air inlet 1 is arranged at the upper end of the nozzle, a nozzle air outlet 5 is arranged at the lower end of the nozzle, an injection molded shell 4 is arranged between the nozzle air inlet and the nozzle air outlet, and a sealing ring 3 can also be arranged on the outer wall of the nozzle air outlet to achieve a sealed connection with the gas pipeline. The injection molded shell can include a nozzle shell 41 and a sealing shell 42, the middle part of the nozzle shell 41 is a gas channel, the gas enters the gas channel from the nozzle air inlet 1 and flows through the driving member, the valve body and the sealing ridge 9 in sequence, the driving end of the driving member is connected to the valve body, and the valve body slides vertically along the guide part; the valve body includes a plurality of valve seats which are sequentially sleeved with the gas channel as the axis; the driving member drives the target number of valve seats to move toward one end of the nozzle air inlet 1, so that the through holes corresponding to the target number of valve seats are connected with the gas channel, the through holes are arranged on the sealing ridge 9 and are located between the sealing rings, and the target number of valve seats are the target number of valve seats from one side of the gas channel to the outside. In this way, under low temperature conditions, more vias corresponding to the valve seats can be connected to the gas channel, and more vias can be connected to increase the nozzle injection flow rate, thereby reducing ice chips blocking the gas pipeline and reducing the risk of difficulty in starting the natural gas engine in a low temperature environment.

[0042] In order to be able to understand the features and technical contents of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure is described in detail below in conjunction with the accompanying drawings. The attached drawings are for reference only and are not used to limit the embodiments of the present disclosure. In the following technical description, for the convenience of explanation, a full understanding of the disclosed embodiments is provided through multiple details. However, one or more embodiments can still be implemented without these details. In other cases, to simplify the drawings, well-known structures and devices can be simplified for display.

[0043] The terms "first", "second", etc. in the specification and claims of the embodiments of the present disclosure and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchanged where appropriate, so that the embodiments of the embodiments of the present disclosure described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0044] Unless otherwise stated, the term "plurality" means two or more.

[0045] In the embodiment of the present disclosure, the character " / " indicates that the preceding and following objects are in an "or" relationship. For example, A / B indicates: A or B.

[0046] The term "and / or" is a description of the association relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or, A and B.

[0047] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0048] See also Figure 2 A schematic diagram of the internal structure of a gas control nozzle is shown, wherein the gas control nozzle comprises a nozzle housing 41 and a guide portion;

[0049] The middle part of the nozzle housing 41 is a gas channel. The gas enters the gas channel from the nozzle air inlet 1 and flows through the drive member, the valve body and the sealing ridge 9 in sequence. The drive end of the drive member is connected to the valve body, and the valve body slides vertically along the guide portion.

[0050] See also Figure 1 , Figure 2The gas enters from the nozzle air inlet 1 and passes through the gas channel in the middle of the nozzle. Further, the driving member drives the valve body to rise, so that the valve body is separated from the sealing ridge 9. The used gas can pass through the through hole on the sealing ridge 9 and be discharged from the nozzle air outlet 5 to enter the gas channel connected to the nozzle air outlet 5.

[0051] The valve body includes a plurality of valve seats which are sleeved in sequence with the gas passage as the axis;

[0052] The sealing ridge 9 includes a plurality of sealing rings protruding toward one side of the valve body with the gas passage as the axis;

[0053] The driving member drives the target number of valve seats to move toward one end of the air inlet, so that the via holes corresponding to the target number of valve seats are connected to the gas channel. The via holes are arranged on the sealing ridge 9 and located between the sealing rings. The target number of valve seats are the target number of valve seats from one side of the gas channel to the outside.

[0054] Based on the above nozzles, the target number in a low temperature environment is greater than the target number in a normal ambient temperature. Under normal ambient temperature conditions, fewer valve seats and corresponding vias are connected to the gas channel adjacent to the nozzle air inlet 1, and the nozzle is connected through fewer vias to achieve normal injection flow rate gas output; while under low temperature conditions, more valve seats and corresponding vias can be connected to the gas channel adjacent to the nozzle air inlet 1, and the nozzle is connected through more vias, thereby increasing the nozzle injection flow rate, reducing ice chips blocking the gas pipeline, and reducing the risk of difficulty in starting the natural gas engine in a low temperature environment.

[0055] For example, the valve body includes two valve seats. Figure 2 , the specific instructions are as follows:

[0056] The valve body includes a primary valve seat 11 and a secondary valve seat 12. The secondary valve seat 12 is sleeved on the outer side of the primary valve seat 11. The middle part of the primary valve seat 11 is a gas channel. The driving member drives the valve seat to move. A guide portion is provided on the outer side of the secondary valve seat 12.

[0057] It can be understood that two valve seats are provided in the nozzle, and the above target number is 1 or 2, that is, in a normal ambient temperature environment, the above target number is 1, and in a low temperature environment, the above target number is 2. Among them, when the target number is 1, the driving member drives the primary valve seat 11 close to the gas channel to move upward, so that the via hole corresponding to the primary valve seat 11 is opened, and the nozzle is turned on. When the target number is 2, the driving member drives the primary valve seat 11 and the secondary valve seat 12 to move upward, and the via holes corresponding to the primary valve seat 11 and the secondary valve seat 12 are all opened. At this time, the injected gas flow rate is greater than the gas flow rate when the target number is 1.

[0058] The sealing ring includes a first sealing ring, a second sealing ring and a third sealing ring which are arranged outward in sequence with the gas channel as the axis, and the sealing ridge 9 is provided with a first through hole between the first sealing ring and the second sealing ring; the sealing ridge 9 is provided with a second through hole between the second sealing ring and the third sealing ring.

[0059] Among them, based on Figure 2 It can be seen that the primary valve seat 11 corresponds to the first through hole, and the secondary valve seat 12 corresponds to the second through hole. When the target number is 1, the driving member drives the primary valve seat 11 to rise, the first sealing ring maintains a gap with the primary valve seat 11, and the second sealing ring and the third sealing ring are both in contact with the primary valve seat 11; the first through hole is opened to connect with the gas channel, the nozzle is turned on, and the gas enters from the nozzle inlet hole, passes through the first through hole, and is discharged from the nozzle outlet hole. When the target number is 2, the driving member drives the primary valve seat 11 and the secondary valve seat 12 to move, and the first sealing ring, the second sealing ring and the third sealing ring are all separated from the corresponding valve seats to maintain a gap. The first through hole and the second through hole are both open, connected with the gas channel, the nozzle is turned on, the number of through holes is increased, and the gas injection amount is increased.

[0060] Optionally, a cross-sectional area of ​​the second via hole is greater than a cross-sectional area of ​​the first via hole.

[0061] Based on the above example, according to the ambient temperature, when in a low temperature environment, the first valve seat 11 and the second valve seat 12 are driven, and the first through hole and the second through hole are opened synchronously to increase the gas injection amount and reduce the risk of gas ice blockage and starting difficulty in the gas nozzle in a low temperature environment.

[0062] Based on the above embodiment, the above driving member can realize driving a target number of valve seats to move toward the nozzle air inlet 1, wherein the target number is less than or equal to the total number of valve seats. In a specific implementation, the above driving member may include a static iron core 6 and a coil 7;

[0063] The static iron core 6 extends outward from one end close to the nozzle air inlet 1 to the inner wall of the nozzle housing 41 to form a limiting portion; the coil 7 is arranged between the limiting portion and the guide portion, and is sleeved on the outside of the static iron core 6; the middle part of the static iron core 6 is a gas channel; the valve seat is connected to the static iron core 6 through a spring.

[0064] Among them, the coil 7 can be Figure 1 Connect to the wiring harness connector 2 in the wiring harness to obtain current.

[0065] Optionally, the elastic force of the springs connected to the multiple valve seats increases sequentially from one side of the gas channel to the outside.

[0066] Applying current to the coil 7 causes the static iron core 6 to generate magnetism, attracting the valve seat to move toward the static iron core 6 (nozzle air inlet 1). The lower the ambient temperature, the greater the current can be applied to the coil 7, so that the suction force of the valve seat is greater, so as to overcome the resistance of the larger spring and the gravity of more valve seats, thereby driving more valve seats to be lifted. Optionally, the weight of multiple valve seats from one side of the gas channel to the outside can be increased in sequence.

[0067] Optional, based on the above Figure 2 The nozzle shown may also include a temperature sensor and a controller;

[0068] The signal output end of the temperature sensor is connected to the controller; the controller is connected to the coil 7. The temperature sensor is used to obtain the ambient temperature. The controller is used to apply a corresponding current value to the coil 7 according to different ambient temperatures fed back by the temperature sensor.

[0069] For example, see Figure 2 , the controller receives the ambient temperature fed back by the temperature sensor. When it is determined that the ambient temperature is not less than the temperature threshold, the current is at normal ambient temperature, and the controller passes the first current to the coil 7; when it is determined that the ambient temperature is less than the temperature threshold, the coil 7 passes the second current at low ambient temperature, and the second current is greater than the first current. Among them, the elastic force of the primary spring 10 connecting the static iron core 6 to the primary valve seat 11 is less than the elastic force of the secondary spring 8 connecting the static iron core 6 to the secondary valve seat 12. When the first current is applied to the coil 7, the static iron core 6 can attract the primary valve seat 11 to move, so that the first valve seat is separated from the first sealing ring to maintain a gap (maintaining contact with the second sealing ring and the third sealing ring, wherein the height of the second sealing ring protrusion is higher than the height of the first sealing ring protrusion), so that the first through hole is open to maintain normal gas flow. When the second current is applied to the coil 7, the static iron core 6 can attract the primary valve seat 11 and the secondary valve seat 12 to move, so that the first through hole and the second through hole corresponding to the primary valve seat 11 and the secondary valve seat 12 are opened, thereby increasing the injection flow rate and reducing the risk of gas ice blockage and starting difficulty in the gas nozzle due to the low temperature environment.

[0070] Based on the above embodiment, when the sealing ridge 9 is installed on the nozzle, it is necessary to keep only the through hole on the sealing ridge 9 connected to the nozzle air inlet 1 and the nozzle air outlet 5, and the side wall of the sealing ridge 9 is kept in a sealed connection with the nozzle, so as to control the injection flow of the gas based on the opening number of the through hole. Therefore, the specific connection structure between the sealing ridge 9 and the nozzle can be as follows:

[0071] A sealing housing 42 is provided at the lower end of the nozzle housing 41 , a first end of the sealing housing 42 is sealedly connected to the nozzle housing 41 , an inner wall of the sealing housing 42 is sealedly fitted to an outer wall of the sealing ridge 9 , and a nozzle air outlet 5 is provided at a second end of the sealing housing 42 .

[0072] Among them, the specific structure of the sealing connection between the first end of the sealing shell 42 and the nozzle shell 41 can be that an L-shaped ring groove is set at the intersection of the upper end surface of the sealing shell 42 and the outer wall, and the nozzle shell 41 is plugged and installed in the L-shaped ring groove to improve the reliability of the connection and maintain coaxiality as much as possible.

[0073] Furthermore, one end of the sealing shell 42 close to the valve body extends inward to form the guide portion. The guide portion is a guide for the valve body, wherein Figure 2 The secondary valve seat 12 is clearance-matched with the guide portion, and the secondary valve seat 12 slides vertically along the guide portion.

[0074] The guide part is coaxially arranged inside the sealing housing 42. When the sealing housing 42 is coaxially connected to the nozzle housing 41 through the above-mentioned L-shaped annular groove, the gas passage in the middle of the valve body vertically sliding along the guide part corresponds to the gas passage in the middle of the nozzle housing 41. At the same time, the outer wall of the sealing ridge 9 is sealed and fitted with the inner wall of the sealing housing 42, and the sealing ridge 9 and the valve seat can also be coaxial. In this way, the sealing ring on the sealing ridge 9 can correspond coaxially to the valve seat. When the coil 7 is not in operation, the innermost sealing ring of the sealing ridge 9 can abut against the valve seat coaxially to maintain the reliability of the seal.

[0075] Based on the above embodiment, the material of the sealing ridge 9 can be a corrosion-resistant rubber material.

[0076] Optionally, a spray hole plate 13 supporting the sealing ridge 9 can be installed inside the sealing shell 42 between the sealing ridge 9 and the nozzle outlet 5 to prevent the impact of the sealing ridge 9 on the sealing ridge 9 during high-speed gas injection from affecting the sealing connection between the sealing ridge 9 and the sealing shell 42.

[0077] Furthermore, the through holes on the sealing ridge 9 should correspond to the inner side of the inner wall of the orifice plate 13 . When the gas passes through the through holes, the gas can be directly discharged from the nozzle outlet 5 through the inner channel of the orifice plate 13 .

[0078] Optionally, the outer wall of the orifice plate 13 has a mounting ring protruding outward at one end near the sealing ridge 9; the sealing ridge 9 extends downward to the mounting ring at the edge of one side close to the orifice plate 13 to form a mounting portion, and the inner wall of the mounting portion is in contact with the outer wall of the orifice plate 13.

[0079] In this way, the inner wall of the mounting portion extending from the sealing ridge 9 fits with the outer wall of the orifice plate, and the outer wall of the sealing ridge 9 fits with the inner wall of the sealing shell 42. The mounting portion is located between the orifice plate 13 and the sealing shell 42, thereby improving the stability of the sealing connection between the sealing ridge 9 and the sealing shell 42.

[0080] Based on the above-mentioned gas control nozzle, the present application also proposes a corresponding control method for the nozzle, and the specific implementation method is as follows:

[0081] like Figure 3 A flow chart of a method for controlling a gas control nozzle is shown. A method for controlling a gas control nozzle is applied to a gas control nozzle provided in any one of the above embodiments, and the method comprises:

[0082] S300: Determine whether the ambient temperature is less than a temperature threshold.

[0083] S301. If the ambient temperature is not less than the temperature threshold, control the driver to drive a first target number of valve seats to move toward the nozzle air inlet, so that the via holes corresponding to the first target number of valve seats are opened and communicated with the gas channel.

[0084] The ambient temperature can be measured by a temperature sensor.

[0085] The above control method can be controlled by setting up an additional controller, or it can be controlled by the staff according to the current temperature conditions.

[0086] S302. If the ambient temperature is lower than the temperature threshold, control the driver to drive the second target number of valve seats to move toward the nozzle air inlet, so that the via holes corresponding to the second target number of valve seats are opened and connected to the gas channel; the second target number is greater than the first target number.

[0087] It can be understood that in one case, in the above steps S301-S302, the temperature threshold can be set according to the highest temperature at which ice chips will appear in the gas pipeline. When the ambient temperature is lower than the temperature threshold, it is in a low temperature environment, and the opening of the vias corresponding to the valve seats can be controlled to be greater than the target number corresponding to the normal temperature.

[0088] In another case, there are multiple valve seats, and the temperature threshold has multiple levels. The lower the temperature, the more holes are opened. The specific method can be:

[0089] S311. If the ambient temperature is not less than the first temperature threshold, control the driver to drive a first target number of valve seats to move toward the nozzle air inlet 1, so that the via holes corresponding to the first target number of valve seats are opened and communicated with the gas channel.

[0090] S312. If the ambient temperature is lower than the first temperature threshold, control the driver to drive the second target number of valve seats to move toward the nozzle air inlet 1, so that the via holes corresponding to the second target number of valve seats are opened and connected to the gas channel; the second target number is greater than the first target number.

[0091] S312. If the ambient temperature is lower than the second temperature threshold, control the driver to drive the third target number of valve seats to move toward the nozzle air inlet 1, so that the via holes corresponding to the third target number of valve seats are opened and connected to the gas channel; the third target number is greater than the second target number.

[0092] Subsequently, a value lower than the second temperature threshold may be further set to cope with lower temperatures and situations requiring a larger gas injection amount, which will not be elaborated here.

[0093] Optionally, for the case where the driver includes a static iron core 6 and a coil 7:

[0094] The above-mentioned control of the driver to drive the first target number of valve seats to move toward the nozzle air inlet 1 includes: applying a first current value to the coil 7 to make the static iron core 6 attract the first target number of valve seats to move toward the nozzle air inlet 1;

[0095] Controlling the driver to drive a second target number of valve seats to move toward the nozzle air inlet 1 includes: applying a second current value to the coil 7 so that the static iron core 6 attracts the second target number of valve seats to move toward the nozzle air inlet 1; the second current value is greater than the first current value.

[0096] When there are multiple levels of valve seats, the present application outputs current to the coil 7 based on the ambient temperature fed back by the temperature sensor; wherein, the lower the ambient temperature, the larger the current output to the coil 7 can be controlled to drive more vias corresponding to the valve seats to open, thereby outputting a larger flow rate of gas to the nozzle exhaust port.

[0097] For example, Figure 2 When the primary valve seat 11 and the secondary valve seat 12 are present, the specific control method includes:

[0098] like Figure 4 A schematic diagram of the coordination between a valve body and a sealing ridge is shown. If the ambient temperature is not less than the temperature threshold, the driver is controlled to drive the first-level valve seat 11 to move toward the nozzle air inlet 1, so that the through hole corresponding to the first-level valve seat 11 is opened and connected to the gas channel.

[0099] like Figure 5 Another schematic diagram of the coordination between the valve body and the sealing ridge is shown. If the ambient temperature is lower than the temperature threshold, the driver is controlled to drive the secondary valve seat 12 to move toward the nozzle air inlet 1, so that the through hole corresponding to the secondary valve seat 12 is opened and connected to the gas channel.

[0100] In summary, the gas control nozzle can determine whether to start the low-temperature working mode (ambient temperature is lower than the temperature threshold) according to the temperature of the working environment, and increase the current of the first coil 7 in the nozzle to increase the suction force of the static iron core 6, thereby driving the first and second stage valve seats 12 to work, and the first through hole and the second through hole are opened synchronously, further increasing the nozzle injection flow rate, thereby greatly reducing the risks of gas ice blockage and starting difficulty in the gas nozzle under low-temperature environment conditions.

[0101] An embodiment of the present application also provides a natural gas engine, which can adopt a gas control nozzle described in any one of the above embodiments.

[0102] The "first" and "second" in the names such as "first" and "second" (if any) mentioned in the embodiments of the present application are only used as name identifiers and do not represent the first or second in order.

[0103] Through the description of the above implementation methods, it can be known that those skilled in the art can clearly understand that all or part of the steps in the above-mentioned embodiment method can be implemented by means of software plus a general hardware platform. Based on such an understanding, the technical solution of the present application can be embodied in the form of a software product, which can be stored in a storage medium, such as a read-only memory (ROM) / RAM, a magnetic disk, an optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, a server, or a network communication device such as a router) to execute the methods described in each embodiment of the present application or some parts of the embodiments.

[0104] Each embodiment in this specification is described in a progressive manner, and the same and similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the device embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment. Some or all of the modules can be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without paying creative work.

[0105] The above description is merely an exemplary embodiment of the present application and is not intended to limit the protection scope of the present application.

Claims

1. A gas control nozzle, characterized in that: It includes a nozzle housing and a guide part; The middle part of the nozzle housing is a gas channel, and the gas enters the gas channel from the nozzle air inlet and flows through the driving member, the valve body and the sealing ridge in sequence. The driving end of the driving member is connected to the valve seat, and the valve body slides vertically along the guide part; The valve body comprises a plurality of valve seats which are sleeved in sequence with the gas passage as the axis; The sealing ridge includes a plurality of sealing rings protruding toward one side of the valve body with the gas channel as the axis; The driving member drives the target number of valve seats to move toward one end of the nozzle air inlet, so that the via holes corresponding to the target number of valve seats are connected to the gas channel, the via holes are arranged on the sealing ridge and located between the sealing rings, and the target number of valve seats are the target number of valve seats from one side of the gas channel to the outside.

2. The nozzle according to claim 1, characterized in that The driving member includes a static iron core and a coil; The static iron core is extended outwardly from one end close to the nozzle air inlet to the inner wall of the nozzle housing to form a limiting portion; the coil is arranged between the limiting portion and the guide portion, and is sleeved on the outside of the static iron core; the middle part of the static iron core is a gas channel; The valve seat is connected to the static iron core through a spring.

3. The nozzle according to claim 2, characterized in that The elastic force of the springs connected to the multiple valve seats increases sequentially from one side of the gas channel to the outside.

4. The nozzle according to any one of claims 1 to 3, characterized in that: The nozzle housing is sealedly connected to a sealing housing at one end close to the nozzle air outlet, and the inner side wall of the sealing housing is in contact with the outer side wall of the sealing ridge; One end of the sealing shell close to the valve seat extends inward to form the guide portion.

5. The nozzle according to any one of claims 1 to 3, characterized in that: A spray hole plate is installed between the sealing ridge and the nozzle air outlet; The outermost through hole included in the sealing ridge corresponds to the inner side of the inner wall of the orifice plate; An outer wall of the orifice plate is provided with a mounting ring protruding outwardly at one end adjacent to the sealing ridge; The sealing ridge extends downward to the mounting ring at an edge of one side close to the orifice plate to form a mounting portion, and the inner side wall of the mounting portion is in contact with the outer side wall of the orifice plate.

6. The nozzle according to claim 3, characterized in that The valve body comprises a primary valve seat and a secondary valve seat, wherein the secondary valve seat is sleeved on the outer side of the primary valve seat, the middle part of the primary valve seat is a gas channel, and a guide part is arranged on the outer side of the secondary valve seat; The sealing ring comprises a first sealing ring, a second sealing ring and a third sealing ring which are arranged outward in sequence with the gas channel as the axis, and a first through hole is arranged between the first sealing ring and the second sealing ring on the sealing ridge; a second through hole is arranged between the second sealing ring and the third sealing ring on the sealing ridge.

7. The nozzle according to claim 6, characterized in that Also included are a temperature sensor and controller; The signal output end of the temperature sensor is connected to the controller; the controller is connected to the coil; the controller is used to apply corresponding current values ​​to the coil according to different ambient temperatures fed back by the temperature sensor.

8. A method for controlling a gas control nozzle, characterized in that: A gas control nozzle as described in any one of claims 1 to 7, the method comprising: If the ambient temperature is not less than the temperature threshold, controlling the driver to drive the first target number of valve seats to move toward the nozzle air inlet, so that the via holes corresponding to the first target number of valve seats are opened and communicated with the gas channel; If the ambient temperature is lower than the temperature threshold, the driver is controlled to drive the second target number of valve seats to move toward the nozzle air inlet, so that the vias corresponding to the second target number of valve seats are opened and connected to the gas channel; the second target number is greater than the first target number.

9. The method according to claim 8, characterized in that The controlling the driver to drive a first target number of valve seats to move toward the nozzle air inlet includes: Applying a first current value to the coil so that the static iron core attracts a first target number of valve seats to move toward the nozzle air inlet; The controlling the driver to drive a second target number of valve seats to move toward the nozzle air inlet includes: Applying a second current value to the coil so that the static iron core attracts a second target number of valve seats to move toward the nozzle air inlet; The second current value is greater than the first current value.

10. A natural gas engine, characterized in that: A gas control nozzle as described in any one of claims 1 to 7 is used.

Images