A pressure regulating component of a gas valve group unit for a gas engine

Abstract

The present invention discloses a pressure regulating component for a gas valve group unit of a gas engine, which comprises an electrical conversion device and a pressure regulating valve. The electrical conversion device is configured to be capable of outputting a control gas with a target pressure P1. The pressure regulating valve is in communication with the electrical conversion device and is used for being installed on a gas pipeline. The pressure regulating valve comprises an actuator, and the actuator has a pressure regulating valve seat. The pressure regulating valve can control the pressure P2 of the gas pipeline located downstream of the pressure regulating valve through the opening degree of the pressure regulating valve seat. The pressure regulating valve is configured to adjust the opening degree of the pressure regulating valve seat according to the relative magnitudes of P1 and P2, wherein when P1 > P2, the opening degree of the pressure regulating valve seat is increased; when P1 = P2, the opening degree of the pressure regulating valve seat is maintained; and when P1 < P2, the opening degree of the pressure regulating valve seat is decreased. According to the pressure regulating component of the present invention, the pressure in the gas pipeline can be adjusted according to the gas pressure output by the electrical conversion device, without performing closed-loop control on the actual gas pressure regulating value, avoiding the matching link between the pressure regulating component and the engine, and improving the applicable range.

Description

Technical Field

[0001] The present invention relates to the technical field of gas fuel engines, and more particularly to a pressure regulating assembly for a gas valve group unit of a gas engine. Background Art

[0002] The traditional ship power industry is an industry that highly depends on oil resources. It is of strategic significance for the ship power industry to increase the utilization of natural gas resources to ensure national energy security and achieve energy conservation and emission reduction. The development and application practice of foreign technologies show that gas fuel engines are gradually becoming the first choice to replace marine diesel engines due to their advantages such as mature technology, good economy, and good emission reduction effects. The gas valve group unit is a key accessory for gas fuel engines, which is installed at the front end of the gas engine. Its main function is to adjust the gas pressure before the engine intake port according to the load of the engine, so as to supply gas that meets the pressure and flow requirements to the gas fuel engine, and at the same time has functions such as nitrogen purging, gas cut-off, and control interlock.

[0003] The pressure regulating assembly is an important component of the gas valve group unit, and its function is to adjust the gas pressure before the engine according to the engine load, so as to control the gas injection amount. However, at present, the pressure regulating assembly needs to carry out closed-loop control of the gas pressure regulation in conjunction with the engine control system before use. For example, it is necessary to connect the gas valve group unit to the main engine for a matching test to set the gas pressure regulation control parameters. If the engine needs to change the supporting supplier of the gas valve group unit or its pressure regulating assembly changes, the above process needs to be repeated, and the applicable range of the pressure regulating assembly is poor.

[0004] Moreover, most pressure regulating assemblies adjust the pressure by adjusting the spring pre-tightening pressure of the pressure regulating valve, and such a method cannot achieve automatic pressure control.

[0005] Therefore, a pressure regulating assembly for a gas valve group unit of a gas engine is needed to at least partially solve the above problems. Summary of the Invention

[0006] A series of simplified concepts are introduced in the Summary of the Invention section, which will be further described in detail in the Detailed Description section. The Summary of the Invention section of the present invention does not mean to attempt to define the key features and essential technical features of the claimed technical solution, nor does it mean to attempt to determine the protection scope of the claimed technical solution.

[0007] To at least partially solve the above problems, the present invention provides a pressure regulating assembly for a gas valve group unit of a gas engine, comprising:

[0008] An electrical conversion device configured to be able to output a control gas having a target pressure P 1 ; and

[0009] Pressure regulating valve, the pressure regulating valve is communicated with the electric conversion device, the pressure regulating valve is used to be installed on the gas pipeline, the pressure regulating valve includes an actuator, the actuator has a pressure regulating valve seat, and the pressure regulating valve can control the pressure P of the gas pipeline located downstream of the pressure regulating valve through the opening degree of the pressure regulating valve seat 2 ; And

[0010] The pressure regulating valve is configured to adjust the opening degree of the pressure regulating valve seat according to the relative magnitude of the received target pressure P of the control gas 1 and the pressure P of the gas pipeline located downstream of the pressure regulating valve 2 wherein, when P

[0011] When P 1 > P 2 the opening degree of the pressure regulating valve seat is increased

[0012] When P 1 = P 2 the opening degree of the pressure regulating valve seat is maintained

[0013] When P 1 < P 2 the opening degree of the pressure regulating valve seat is decreased

[0014] Furthermore, the pressure regulating assembly further includes a control device, the control device is electrically connected to the electric conversion device, and the control device is configured to determine the target pressure P according to the load 1 and send an electrical signal corresponding to the target pressure P 1 to the electric conversion device

[0015] Furthermore, the electric conversion device has an air inlet and an air outlet, the air inlet is used to receive compressed air, the air outlet is communicated with the pressure regulating valve, and the electric conversion device is configured to convert the compressed air into the control gas with the target pressure P according to the received electrical signal 1 and transport the control gas to the pressure regulating valve

[0016] Furthermore, the pressure regulating valve further includes a controller, the controller is communicated with the electric conversion device, and the controller is configured to adjust the opening degree of the pressure regulating valve seat according to the received target pressure P of the control gas 1 Adjust the opening degree of the pressure regulating valve seat

[0017] Furthermore, the controller includes:

[0018] A first control chamber, the first control chamber is communicated with the electric conversion device to receive the control gas with the target pressure P 1the control gas;

[0019] a second control chamber, which can communicate with the gas pipeline located downstream of the pressure regulating valve, and the pressure in the second control chamber is P 2 '; and

[0020] a control diaphragm that separates the first control chamber and the second control chamber;

[0021] wherein, the control diaphragm is configured to move according to the relative magnitudes of the target pressure P 1 and the pressure P 2 ' in the second control chamber, so as to adjust the opening degree of the pressure regulating valve seat.

[0022] Further, the controller further includes:

[0023] a third control chamber, which includes a pre-valve control chamber and a post-valve control chamber, and the pre-valve control chamber can communicate with the gas pipeline located upstream of the pressure regulating valve; and

[0024] a control valve seat, which is arranged in the third control chamber and separates the pre-valve control chamber and the post-valve control chamber, and the control valve seat is connected to the control diaphragm, and the control valve seat is configured to change the opening degree in response to the movement of the control diaphragm, so as to control the opening degree of the pressure regulating valve seat;

[0025] where when P 1 > P 2 ', the opening degree of the control valve seat increases, so that the pressure P 3 in the post-valve control chamber increases,

[0026] when P 1 = P 2 ', maintain the opening degree of the control valve seat to keep P 3 stable,

[0027] when P 1 < P 2 ', the opening degree of the control valve seat decreases, so that P 3 decreases.

[0028] Further, the actuator further includes:

[0029] a first pressure regulating chamber, which is used to communicate with the gas pipeline located downstream of the pressure regulating valve, the second control chamber communicates with the first pressure regulating chamber, and the pressure in the first pressure regulating chamber is P 2 ";

[0030] A second pressure regulating chamber, which is communicated with the post-valve control chamber, and the pressure in the second pressure regulating chamber is P 3 ’;

[0031] A pressure regulating diaphragm, which separates the first pressure regulating chamber from the second pressure regulating chamber, the pressure regulating valve seat is connected to the pressure regulating diaphragm, and the pressure regulating diaphragm has a small hole communicating the first pressure regulating chamber and the second pressure regulating chamber; and

[0032] A pressure regulating elastic member, the pressure regulating diaphragm is connected to the pressure regulating elastic member, and the pressure regulating elastic member provides a pre-tightening pressure P 4 ;

[0033] Wherein, the pressure regulating diaphragm is configured to move according to the relative magnitude of the pressure P 3 ’ in the second pressure regulating chamber and the pressure P 2 ” in the first pressure regulating chamber and the pre-tightening pressure P 4 sum, so as to adjust the opening degree of the pressure regulating valve seat,

[0034] When P 3 ’ > P 2 ” + P 4 the opening degree of the pressure regulating valve seat is controlled to increase,

[0035] When P 3 ’ = P 2 ” + P 4 the opening degree of the pressure regulating valve seat is maintained,

[0036] When P 3 ’ < P 2 ” + P 4 the opening degree of the pressure regulating valve seat is reduced.

[0037] Furthermore, the actuator further includes:

[0038] A third pressure regulating chamber, which includes a pre-valve pressure regulating chamber and a post-valve pressure regulating chamber, the pressure regulating valve seat is arranged in the third pressure regulating chamber and separates the pre-valve pressure regulating chamber from the post-valve pressure regulating chamber;

[0039] Wherein, the third pressure regulating chamber is used to be installed on the gas pipeline, wherein the pre-valve pressure regulating chamber is used to be communicated with the gas pipeline located upstream of the pressure regulating valve, and the post-valve pressure regulating chamber is used to be communicated with the gas pipeline located downstream of the pressure regulating valve; and

[0040] The first pressure regulating chamber is communicated with the post-valve pressure regulating chamber, and the pre-valve control chamber is communicated with the pre-valve pressure regulating chamber.

[0041] Further, the pressure regulating assembly further includes a conduit, and the first pressure regulating chamber and the post-valve pressure regulating chamber, the second pressure regulating chamber and the post-valve control chamber, the pre-valve control chamber and the pre-valve pressure regulating chamber, the first pressure regulating chamber and the second control chamber, and between the first control chamber and the electrical conversion device are all communicated via the conduit.

[0042] Further, the controller further includes a control elastic member, the control diaphragm is connected to the control elastic member, and the control elastic member provides a pre-tightening pressure for the control diaphragm.

[0043] According to the pressure regulating assembly of the present invention, it can adjust the pressure in the gas pipeline according to the gas pressure output by the electrical conversion device, without performing closed-loop control on the actual gas pressure regulation value, avoiding the matching link between the pressure regulating assembly and the engine, and improving the applicable range of the gas valve unit. Description of the Drawings

[0044] The following drawings of the present invention are used as a part of the present invention to understand the present invention. The embodiments of the present invention shown in the drawings and their descriptions are used to explain the principles of the present invention.

[0045] In the drawings:

[0046] Figure 1 It is a schematic structural diagram of a pressure regulating assembly according to a preferred embodiment of the present invention.

[0047] Description of the Reference Numerals:

[0048] 100: Pressure regulating assembly 110: Control device 120: Electrical conversion device

[0049] 121: Air outlet 122: Air inlet 130: Pressure regulating valve

[0050] 140: Controller 141: First control chamber 142: Second control chamber

[0051] 143: Third control chamber 144: Pre-valve control chamber 145: Post-valve control chamber

[0052] 146: Control valve seat 147: Control diaphragm 148: Control elastic member

[0053] 150: Actuator 151: First pressure regulating chamber 152: Second pressure regulating chamber

[0054] 153: Third pressure regulating chamber 154: Pre-valve pressure regulating chamber 155: Post-valve pressure regulating chamber

[0055] 156: Pressure regulating valve seat 157: Pressure regulating diaphragm 158: Pressure regulating elastic member

[0056] 159: Small hole Detailed implementation manners

[0057] In the following description, numerous specific details are given to provide a more thorough understanding of the present invention. However, it will be apparent to one skilled in the art that the present invention may be practiced without one or more of these details. In other instances, some well-known technical features are not described in order to avoid obscuring the present invention.

[0058] For a thorough understanding of the present invention, a detailed description will be presented in the following. Obviously, the implementation of the embodiments of the present invention is not limited to the specific details familiar to those skilled in the art. The preferred embodiments of the present invention are described in detail below. However, in addition to these detailed descriptions, the present invention may have other implementation manners.

[0059] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular forms are also intended to include the plural forms. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they specify the presence of the described features, wholes, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, wholes, steps, operations, elements, components, and / or combinations thereof.

[0060] The ordinal numbers such as "first" and "second" cited in the present invention are merely identifiers and do not have any other meanings, such as a specific order, etc. Moreover, for example, the term "first component" does not imply the existence of a "second component" by itself, and the term "second component" does not imply the existence of a "first component" by itself.

[0061] It should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "inner", "outer" and similar expressions used herein are for illustrative purposes only and are not restrictive.

[0062] Now, exemplary embodiments according to the present invention will be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many different forms and should not be construed as being limited only to the embodiments set forth herein. It should be understood that these embodiments are provided so that the disclosure of the present invention is thorough and complete, and the concepts of these exemplary embodiments are fully conveyed to those of ordinary skill in the art.

[0063] Figure 1The pressure regulating assembly 100 showing a preferred embodiment of the present invention is used for the gas valve unit of a gas engine. The pressure regulating assembly 100 of the present invention includes a control device 110, an electrical conversion device 120, and a pressure regulating valve 130.

[0064] Among them, the control device 110 is configured to determine the target pressure P according to the load 1 , and convert it into a corresponding analog electrical signal, and at the same time transmit the electrical signal to the electrical conversion device 120 electrically connected to the control device 110.

[0065] The electrical conversion device 120 has an air inlet 122 capable of receiving compressed air and an air outlet 121 for exhausting air. For example, the air inlet 122 can be communicated with an air compressor. When the electrical conversion device 120 receives the above electrical signal representing the target pressure P 1 , it can convert the compressed air into a control gas with the target pressure P 1 , and transport the control gas to the pressure regulating valve 130.

[0066] The pressure regulating valve 130 is installed on the gas pipeline. The pressure regulating valve 130 includes an actuator 150. The actuator 150 has a pressure regulating valve seat 156. The opening degree of the pressure regulating valve seat 156 can adjust the amount of gas flowing through the pressure regulating valve 130 in the gas pipeline, that is, it can adjust the pressure P of the gas pipeline located downstream of the pressure regulating valve 130 2 .

[0067] After the pressure regulating valve 130 receives the above control gas with the pressure of P 1 , if P 1 > P 2 , then the opening degree of the pressure regulating valve seat 156 increases, so that P 2 gradually rises until it reaches the target pressure P 1 . Since the pressure P in the gas pipeline located upstream of the pressure regulating valve 130 0 is relatively large, it is always greater than or equal to P in the gas pipeline located downstream of the pressure regulating valve 130 2 , preferably P 0 > P 2 . Therefore, after the opening degree of the pressure regulating valve seat 156 increases, the gas in the gas pipeline located upstream of the pressure regulating valve 130 can flow to the gas pipeline located downstream of the pressure regulating valve 130, and then P 2 gradually rises.

[0068] When P 1 = P 2 , maintain the opening degree of the pressure regulating valve seat 156 so that P 2 remains stable. And when P 1 < P 2When it is, the opening degree of the pressure regulating valve seat 156 is reduced, so that P 2 gradually decreases.

[0069] According to the pressure regulating component 100 of the present invention, the pressure in the gas pipeline can be regulated according to the gas pressure output by the electric conversion device 120, without performing closed-loop control on the actual gas pressure regulation value, avoiding the matching link between the pressure regulating component 100 and the engine, and improving the applicable range of the gas valve group unit.

[0070] Moreover, by only adjusting the analog electric signal of the control device 110, the purpose of automatic control of the gas pressure can be achieved, improving the responsiveness of the pressure regulation compared with the closed-loop control method.

[0071] For the specific structure of the pressure regulating valve 130, please continue to refer to Figure 1 . The pressure regulating valve 130 includes a controller 140 and the above-mentioned actuator 150.

[0072] Specifically, the controller 140 includes a first control chamber 141, a second control chamber 142, a third control chamber 143, a control diaphragm 147 and a control valve seat 146. The first control chamber 141 is located above the second control chamber 142 and is separated by the control diaphragm 147. The third control chamber 143 is located below the second control chamber 142 and is separated from the second control chamber 142. Among them, the pressure in the first control chamber 141 is P 1 , and the pressure in the second control chamber 142 is P 2 ’.

[0073] The control valve seat 146 is arranged in the third control chamber 143 and divides the third control chamber 143 into a pre-valve control chamber 144 and a post-valve control chamber 145. The control valve seat 146 is connected to the control diaphragm 147 and can adjust its own opening degree in response to the up and down movement of the control diaphragm 147. And the control diaphragm 147 can move up and down in response to the pressure difference between the first control chamber 141 and the second control chamber 142.

[0074] Exemplarily, when the pressure in the first control chamber 141 is greater than that in the second control chamber 142, the control diaphragm 147 can move downward, so that the control valve seat 146 correspondingly increases the opening degree; and vice versa when the pressure in the first control chamber 141 is less than that in the second control chamber 142.

[0075] The actuator 150 includes a first pressure regulating chamber 151, a second pressure regulating chamber 152, a third pressure regulating chamber 153, a pressure regulating diaphragm 157, the above-mentioned pressure regulating valve seat 156 and a pressure regulating elastic member 158. Among them, the pressure in the first pressure regulating chamber 151 is P 2 ”, and the pressure in the second pressure regulating chamber 152 is P 3 ’.

[0076] Among them, the first pressure regulating chamber 151 is located above the second pressure regulating chamber 152 and is separated by a pressure regulating diaphragm 157. A small hole 159 that can connect the two is provided on the pressure regulating diaphragm 157. The small hole 159 is preferably unidirectionally conductive from the second pressure regulating chamber 152 to the first pressure regulating chamber 151.

[0077] The third pressure regulating chamber 153 is located below the second pressure regulating chamber 152 and is separated from the second pressure regulating chamber 152. A pressure regulating valve seat 156 is arranged in the third pressure regulating chamber 153 and divides it into a pre-valve pressure regulating chamber 154 and a post-valve pressure regulating chamber 155. The third pressure regulating chamber 153 is used to be arranged on the gas pipeline. For example, the pre-valve pressure regulating chamber 154 is used to communicate with the gas pipeline upstream of the pressure regulating valve 130, and the post-valve pressure regulating chamber 155 is used to communicate with the gas pipeline downstream of the pressure regulating valve 130.

[0078] The pressure regulating valve seat 156 is connected to the pressure regulating diaphragm 157 and can change its own opening degree in response to the up and down movement of the pressure regulating diaphragm 157. Moreover, a pressure regulating elastic member 158 is also connected to the pressure regulating diaphragm 157, and it can provide a downward pre-tightening pressure for the pressure regulating diaphragm 157. The pressure regulating diaphragm 157 can move up and down according to the pressure it receives.

[0079] Exemplarily, when the pressure in the second pressure regulating chamber 152 is greater than the sum of the pressure in the first pressure regulating chamber 151 and the above-mentioned pre-tightening pressure, the pressure regulating diaphragm 157 can move upward, so that the opening degree of the pressure regulating valve seat 156 increases; vice versa when the pressure in the second pressure regulating chamber 152 is less than the sum of the pressure in the first pressure regulating chamber 151 and the above-mentioned pre-tightening pressure.

[0080] And, continue to refer to Figure 1 . The first control chamber 141 is communicated with the electrical conversion device 120 through a conduit, so the pressure in the first control chamber 141 is P 1 .

[0081] The second control chamber 142 is communicated with the first pressure regulating chamber 151 through a conduit, and the first pressure regulating chamber 151 is communicated with the post-valve pressure regulating chamber 155 through a conduit, and the post-valve pressure regulating chamber 155 is communicated with the gas pipeline downstream of the pressure regulating valve 130. Therefore, the pressure P 2 ' in the second control chamber 142, the pressure P 2 " in the first pressure regulating chamber 151 and the pressure in the post-valve pressure regulating chamber 155 can be equal to the pressure P 2 in the gas pipeline downstream of the pressure regulating valve 130.

[0082] The second pressure regulating chamber 152 is communicated with the post-valve control chamber 145 through a conduit, so the pressure P 3 ' in the second pressure regulating chamber 152 and the pressure P 3 in the post-valve control chamber 145 can be equal, and P 3 (P3 ’) is preferably greater than P 2 .

[0083] The pressure regulation process will be described in detail below. When P 2 needs to be increased, for example, the control device 110 determines according to the load of the engine that the engine needs more fuel gas, so the pressure in the fuel gas pipeline downstream of the pressure regulating valve 130 needs to be increased to P 1 , and P 1 > P 2 . It generates an electrical signal representing the target pressure P 1 and transmits this electrical signal to the electrical conversion device.

[0084] After receiving the above electrical signal, the electrical conversion device 120 conveys gas with a pressure of P 1 to the first control chamber 141. At this time, the control diaphragm 147 moves downward, thereby driving the opening of the control valve seat 146 to increase, resulting in a gradual increase in the pressure P 2 ' in the second control chamber 142. At this time, the pressure regulating diaphragm 157 is simultaneously subjected to an upward pressure P 3 ' from the second pressure regulating chamber 152, a downward pressure P 2 " from the first pressure regulating chamber 151, and a downward pressure P 4 from the pressure regulating elastic member 158. At this time, P 3 '> P 2 "+ P 4 , then the pressure regulating diaphragm 157 moves upward, thereby driving the opening of the pressure regulating valve seat 156 to increase, and further causing P 2 to gradually increase.

[0085] If P 2 increases to the target value of pressure regulation, that is, P 1 = P 2 , then the control diaphragm 147 stops moving and remains stable, so that the opening of the control valve seat 146 remains stable. Moreover, the second control chamber 142 is still connected to the first control chamber 141 via the small hole 159, so the gas in the second control chamber 142 is continuously lost and replenished, resulting in P 3 and P 3 ' also remaining stable. At this time, P 3 ' = P 2 "+ P 4 , the control diaphragm 147 stops moving, so that the opening of the control valve seat 146 remains stable, enabling the pressure in the fuel gas pipeline downstream of the pressure regulating valve 130 to be stabilized at the target value P 1 (that is, at this time, P 1 = P 2 ).

[0086] When P 2When it decreases, similar to the above, the control device 110 sends a corresponding electrical signal to the electrical conversion device 120, and the electrical conversion device 120 conveys gas with a pressure of P to the first control chamber 141 according to this electrical signal, and P < P. At this time, the control diaphragm 147 moves upward, thereby driving the opening of the control valve seat 146 to decrease, resulting in a gradual decrease in the pressure P' in the second control chamber 142. At this time, the pressure regulating diaphragm 157 is simultaneously subjected to an upward pressure P' from the second pressure regulating chamber 152, a downward pressure P" from the first pressure regulating chamber 151, and a downward pressure P from the pressure regulating elastic member 158. At this time, P' < P" + P, then the pressure regulating diaphragm 157 moves downward, thereby driving the opening of the pressure regulating valve seat 156 to decrease, and further causing P to gradually decrease. 1 gas, and P 1 <P 2 . At this time, the control diaphragm 147 moves upward, thereby driving the opening of the control valve seat 146 to decrease, resulting in a gradual decrease in the pressure P' in the second control chamber 142. At this time, the pressure regulating diaphragm 157 is simultaneously subjected to an upward pressure P' from the second pressure regulating chamber 152, a downward pressure P" from the first pressure regulating chamber 151, and a downward pressure P from the pressure regulating elastic member 158. 2 ’ gradually decreases. At this time, the pressure regulating diaphragm 157 is simultaneously subjected to an upward pressure P 3 ’ from the second pressure regulating chamber 152, a downward pressure P 2 ” from the first pressure regulating chamber 151, and a downward pressure P 4 from the pressure regulating elastic member 158. At this time, P 3 ’ < P 2 ” + P 4 , then the pressure regulating diaphragm 157 moves downward, thereby driving the opening of the pressure regulating valve seat 156 to decrease, and further causing P 2 to gradually decrease.

[0087] If P 2 decreases to the target value of pressure regulation, that is, P 1 = P 2 when, then the control diaphragm 147 stops moving and remains stable, thereby maintaining the stability of the opening of the control valve seat 146. The second control chamber 142 is also communicated with the first control chamber 141 via the small hole 159. Therefore, the gas in the second control chamber 142 is continuously lost and replenished, resulting in P 3 also remaining stable. At this time, P 3 ’ = P 2 ” + P 4 , the control diaphragm 147 stops moving, thereby maintaining the stability of the opening of the control valve seat 146, so that the pressure in the gas pipeline downstream of the pressure regulating valve 130 can be stabilized at the target value P 1 .

[0088] In addition, the controller 140 can also set a control elastic member 148. The control diaphragm 147 is connected to the control elastic member 148, and the control elastic member 148 provides a pre-tightening pressure for the control diaphragm 147. For example, the control elastic member 148 always provides a downward elastic force for the control diaphragm 147, so that P 2 always remains at a certain value, thus making the starting point of pressure regulation of the pressure regulating valve 130 not start from zero.

[0089] Unless otherwise defined, the technical and scientific terms used herein have the same meanings as commonly understood by one of ordinary skill in the technical field of the present invention. The terms used herein are for the purpose of describing particular embodiments only and are not intended to limit the present invention. Features described in one embodiment herein may be applied to another embodiment alone or in combination with other features, unless the feature is not applicable or otherwise stated in that other embodiment.

[0090] The present invention has been illustrated by the above embodiments, but it should be understood that the above embodiments are for illustrative and exemplary purposes only and are not intended to limit the present invention to the scope of the described embodiments. In addition, those skilled in the art can understand that the present invention is not limited to the above embodiments, and more variations and modifications can be made according to the teachings of the present invention, and these variations and modifications all fall within the scope of protection required by the present invention. The scope of protection of the present invention is defined by the appended claims and their equivalent scope.

Claims

1. A pressure regulating component of a gas valve group unit for a gas engine, characterized in that, comprising: A control device configured to determine a target pressure P based on a load 1 ; An electrical conversion device, the electrical conversion device being electrically connected to the control device, the control device sending an electrical signal corresponding to the target pressure P 1 to the electrical conversion device, the electrical conversion device having an air inlet and an air outlet, the air inlet being for receiving compressed air, the electrical conversion device being configured to convert the compressed air into a control gas having the target pressure P 1 in accordance with the received electrical signal and output the control gas having the target pressure P 1 from the air outlet; and Pressure regulating valve, the pressure regulating valve is communicated with the air outlet of the electrical conversion device, the pressure regulating valve is used to be installed on the gas pipeline, the pressure regulating valve includes a controller and an actuator, the controller is communicated with the electrical conversion device, the actuator has a pressure regulating valve seat, and the pressure regulating valve can control the pressure P of the gas pipeline located downstream of the pressure regulating valve through the opening degree of the pressure regulating valve seat 2 ; and The controller is configured to adjust the opening degree of the pressure regulating valve seat according to the relative magnitudes of the target pressure P of the received control gas 1 and the pressure P of the gas pipeline located downstream of the pressure regulating valve 2 , and the controller includes: The first control chamber, which is in communication with the electrical conversion device to receive the control gas having the target pressure P 1 thereof. Second control chamber, the second control chamber can communicate with the gas pipeline located downstream of the pressure regulating valve, and the pressure in the second control chamber is P 2 ’, P 2 ’ = P 2 , a control diaphragm that separates the first control chamber and the second control chamber, a third control chamber that includes a pre-valve control chamber and a post-valve control chamber, the pre-valve control chamber being capable of communicating with the gas pipeline upstream of the pressure regulating valve, and a control valve seat disposed in the third control chamber that separates the pre-valve control chamber and the post-valve control chamber, the control valve seat being connected to the control diaphragm, Wherein, the control diaphragm is configured to move according to the relative magnitudes of the target pressure P 1 and the pressure P 2 ' in the second control chamber, and the control valve seat is configured to change its opening degree in response to the movement of the control diaphragm, thereby controlling the opening degree of the pressure regulating valve seat When P 1 > P 2 ’, the opening degree of the control valve seat increases, so that the pressure P 3 of the control chamber behind the valve increases, thereby increasing the opening degree of the pressure regulating valve seat. When P 1 = P 2 ', maintain the opening degree of the control valve seat so that P 3 remains stable, and further maintain the opening degree of the pressure regulating valve seat. When P 1 <P 2 ’, the opening degree of the control valve seat decreases, causing P 3 to decrease, and further decreasing the opening degree of the pressure regulating valve seat. The actuator further includes: The first pressure regulating chamber is used to communicate with the gas pipeline located downstream of the pressure regulating valve. The second control chamber communicates with the first pressure regulating chamber, and the pressure in the first pressure regulating chamber is P 2 ”, P 2 ” = P 2 , The second pressure regulating chamber, the second pressure regulating chamber is communicated with the post-valve control chamber, and the pressure in the second pressure regulating chamber is P 3 ’, P 3 ’ = P 3 , a pressure regulating diaphragm that separates the first pressure regulating chamber and the second pressure regulating chamber, the pressure regulating valve seat being connected to the pressure regulating diaphragm, and the pressure regulating diaphragm having a small hole that communicates the first pressure regulating chamber and the second pressure regulating chamber, A pressure-regulating elastic member, the pressure-regulating diaphragm is connected to the pressure-regulating elastic member, and the pressure-regulating elastic member provides a pre-tightening pressure P for the pressure-regulating diaphragm 4 , The pressure regulating diaphragm is configured to move according to the relative magnitude of the sum of the pressure P 3 ’ in the second pressure regulating chamber and the pressure P 2 ” in the first pressure regulating chamber and the pre-tightening pressure P 4 so as to adjust the opening degree of the pressure regulating valve seat. When P 3 ’ > P 2 ” + P 4 the opening degree of the pressure regulating valve seat is controlled to increase, When P 3 ’ = P 2 ” + P 4 maintain the opening degree of the pressure regulating valve seat When P 3 ’ < P 2 ” + P 4 the opening degree of the pressure regulating valve seat is reduced.

2. The pressure regulating component according to claim 1, characterized in that, The actuator further includes: a third pressure regulating chamber that includes a pre-valve pressure regulating chamber and a post-valve pressure regulating chamber, the pressure regulating valve seat being disposed in the third pressure regulating chamber and separating the pre-valve pressure regulating chamber and the post-valve pressure regulating chamber; wherein, the third pressure regulating chamber is for installation to the gas pipeline, wherein the pre-valve pressure regulating chamber is for communicating with the gas pipeline upstream of the pressure regulating valve, the post-valve pressure regulating chamber is for communicating with the gas pipeline downstream of the pressure regulating valve; and the first pressure regulating chamber communicates with the post-valve pressure regulating chamber, and the pre-valve control chamber communicates with the pre-valve pressure regulating chamber.

3. The pressure regulating component according to claim 2, characterized in that, The pressure regulating component further includes a conduit, and the first pressure regulating chamber and the post-valve pressure regulating chamber, the second pressure regulating chamber and the post-valve control chamber, the pre-valve control chamber and the pre-valve pressure regulating chamber, the first pressure regulating chamber and the second control chamber, and between the first control chamber and the electrical conversion device are all communicated via the conduit.

4. The pressure regulating component according to claim 1, characterized in that, The controller further includes a control elastic member, the control diaphragm is connected to the control elastic member, and the control elastic member provides a pre-tightening pressure for the control diaphragm.

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