Fuel gas supply system of internal combustion engine

Abstract

The invention relates to an internal combustion engine fuel gas supply system which comprises a conveying pipeline, a fuel gas detection device, a ventilation device and a controller, the conveying pipeline comprises a plurality of first pipelines which are sequentially connected in a sealed mode, each first pipeline comprises an inner pipe, an outer pipe and a first end flange, the inner pipes define a first fuel gas conveying cavity, and the outer pipes are arranged outside the inner pipes in a sleeving mode to form an interlayer; the first end flanges are connected to the end of the inner pipe and the end of the outer pipe, the first end flanges are provided with first gas holes communicating with the first gas conveying cavities of the two adjacent first pipelines and vent holes communicating with the interlayer, and at least one of the two adjacent first end flanges is provided with an annular gas collecting groove communicating with the vent holes. The fuel gas detection device is used for detecting whether fuel gas exists in the interlayer or not, a suction port of the ventilation device communicates with the first pipeline interlayer, and the controller is in communication connection with the fuel gas detection device and the ventilation device. The fuel gas supply system of the internal combustion engine can effectively improve the sealing problem of the connecting position of the pipes, the position of a leakage point can be found conveniently, and maintenance is convenient.

Description

Technical Field

[0001] The present invention relates to the technical field of internal combustion engines, and in particular to a fuel gas supply system for an internal combustion engine. Background Art

[0002] When used with a traditional internal combustion engine power generation device, there may be a release source in the gas supply system, causing the gas to invade the environment and the maximum concentration of the gas to exceed the lower explosion limit, causing the internal combustion engine power generation device to fail to meet high explosion-proof grade requirements.

[0003] When supporting traditional internal combustion engine power generation devices, the area near the device is divided into explosive gas environment hazardous areas according to the specifications, and measures should be taken to eliminate or control sparks, arcs or high temperatures generated by equipment circuits in the area. Due to the large number of electrical components and complex control circuits of internal combustion engine power generation devices, it is difficult to achieve explosion-proof treatment of all electrical components. Therefore, it is most feasible to eliminate all possible release sources of the internal combustion engine gas supply system, make it impossible for gas to invade the environment, and divide the area near the internal combustion engine power generation device into a non-explosion hazardous area.

[0004] Therefore, how to improve the internal combustion engine gas supply system, eliminate gas leakage, and divide the area near the internal combustion engine power generation device into a non-explosion hazardous area has become an important technical problem that technical personnel in this field need to solve urgently. Summary of the invention

[0005] The object of the present invention is to provide a gas supply system for an internal combustion engine, so as to improve the safety of the gas supply system for the internal combustion engine, eliminate gas leakage, and enable the vicinity of the internal combustion engine power generation device to be divided into a non-explosion hazardous area.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A gas supply system for an internal combustion engine, comprising:

[0008] A delivery pipeline, the delivery pipeline comprises a plurality of first pipelines which are sealed and connected in sequence, the first pipeline comprises an inner pipe, an outer pipe and a first end flange, the inner pipe encloses a first gas delivery cavity, the outer pipe is sleeved outside the inner pipe, a sandwich is formed between the outer pipe and the inner pipe, the first end flange is connected to the ends of the inner pipe and the outer pipe, the first end flange is provided with a first gas hole and a plurality of vents which are arranged at intervals along the circumferential direction and are connected to the sandwich, the first gas delivery cavities of two adjacent first pipelines are connected through the first gas hole, the first end flange of at least one of the two adjacent first pipelines is provided with an annular gas collecting groove, the respective vents of the two first end flanges which cooperate with each other are connected through the annular gas collecting groove, and a sealing structure is provided between the two first end flanges which cooperate with each other on the outer peripheral side of the first gas hole and the outer peripheral side of each vent;

[0009] A gas detection device, used to detect whether there is gas in the interlayer;

[0010] a ventilation device, wherein a suction port of the ventilation device is in communication with the interlayer of at least one of the first pipes;

[0011] A controller is respectively connected to the gas detection device and the ventilation device for communication, and the controller controls the working state of the ventilation device according to a preset time interval and a detection value of the gas detection device.

[0012] In one embodiment of the present application, it also includes:

[0013] a protective gas supply device, the protective gas supply device being in communication with the interlayer of at least one of the first pipelines, and the protective gas supply device being in communication with the controller;

[0014] A gas pressure detection device, used for detecting the gas pressure in the first gas delivery chamber, the gas pressure detection device being communicatively connected with the controller;

[0015] An interlayer pressure detection device, used to detect the pressure in the interlayer, the interlayer pressure detection device is communicatively connected with the controller;

[0016] The controller is used to control the protective gas supply device to supply protective gas into the interlayer until the pressure in the interlayer is greater than the gas pressure in the first gas delivery chamber when the pressure in the interlayer is less than or equal to the gas pressure in the first gas delivery chamber.

[0017] In one embodiment of the present application, the protective gas supply device includes:

[0018] A gas storage cylinder storing a protective gas;

[0019] A control valve, wherein the gas supply port of the gas storage cylinder is connected to the interlayer of at least one of the first pipelines through the control valve, and the control valve is communicatively connected to the controller.

[0020] In one embodiment of the present application, the ventilation device comprises:

[0021] an exhaust fan, wherein the suction port of the exhaust fan is connected to the interlayer of the first pipeline located at one end of the delivery pipeline through a pipeline,

[0022] A one-way valve is arranged on the outer tube of the first pipeline located at the other end of the delivery pipeline, and the one-way valve is used to conduct one-way communication between the atmospheric environment and the interlayer from outside to inside along the radial direction of the first pipeline.

[0023] In one embodiment of the present application, it also includes:

[0024] A gas concentration detection device, the gas concentration detection device is arranged in the interlayer, and is used to detect the gas concentration in the interlayer, and the gas concentration detection device is communicatively connected with the controller;

[0025] An alarm device is communicatively connected with the controller, and the controller is used to control the alarm device to alarm and control the ventilation device to start when the gas concentration in the interlayer exceeds a preset value.

[0026] In one embodiment of the present application, the delivery pipeline also includes a second pipeline and a gas valve, the second pipeline includes a pipeline body and second end flanges arranged at both ends of the pipeline body, the pipeline body encloses a second gas delivery cavity, the second end flange is provided with a second gas hole connected to the second gas delivery cavity, the second end flange is sealed and detachably connected to the first end flange, so that the first gas hole is connected to the second gas hole, and the end of the second pipeline away from the first pipeline is sealed and detachably connected to the gas valve through the second end flange.

[0027] In one embodiment of the present application, a negative pressure device is also included, and the negative pressure device includes:

[0028] An annular negative pressure cover, which is used for sealing and is arranged at the connection between the second pipeline and the gas valve;

[0029] A negative pressure device is connected to the annular negative pressure cover through a pipeline, and the negative pressure device is communicatively connected to the controller, and the controller controls the working state of the negative pressure device according to preset instructions.

[0030] In one embodiment of the present application, the first pipe further includes a support member, which is disposed in the interlayer and is respectively connected to the inner pipe and the outer pipe to support the inner pipe and the outer pipe along the circumference and extension direction of the first pipe.

[0031] In one embodiment of the present application, the support member includes a plurality of annular support plates, the outer edges of the annular support plates are connected to the inner tube wall of the outer tube, the inner edges of the annular support plates are connected to the outer tube wall of the inner tube, the annular support plates are arranged in sequence at intervals along the extension direction of the first pipeline, and a plurality of connecting holes are arranged on the annular support plates at intervals along the circumferential direction.

[0032] In one embodiment of the present application, the support member includes a plurality of strip support plates, wherein the strip support plates extend from one end of the interlayer to the other end along the extension direction of the first pipe, and each of the strip support plates is arranged at intervals along the circumference of the interlayer, and the strip support plates are connected to the inner tube wall of the outer tube along the radial outer edge of the first pipe, and the strip support plates are connected to the outer tube wall of the inner tube along the radial inner edge of the first pipe, and a plurality of connecting holes are arranged at intervals along the extension direction on the strip support plates.

[0033] It can be seen from the above technical scheme that the present invention discloses a gas supply system for an internal combustion engine, which includes a delivery pipeline, a gas detection device, a ventilation device and a controller, wherein the delivery pipeline includes a plurality of first pipelines that are sealed and connected in sequence, the first pipeline includes an inner pipe, an outer pipe and a first end flange, the inner pipe surrounds a first gas delivery cavity, the outer pipe is sleeved outside the inner pipe, a sandwich is formed between the outer pipe and the inner pipe, the first end flange is connected to the ends of the inner pipe and the outer pipe, the first end flange is provided with a first gas hole and a plurality of vents that are arranged at intervals along the circumferential direction and are connected to the sandwich, and the first gas delivery cavities of two adjacent first pipelines are connected through the first gas delivery cavities. A gas hole is connected, and an annular gas collecting groove is arranged on the first end flange of at least one of the two adjacent first pipes. The air holes of the two first end flanges that match each other are connected through the annular gas collecting groove. A sealing structure is arranged between the two first end flanges that match each other on the outer peripheral side of the first gas hole and the outer peripheral side of each air hole. The gas detection device is used to detect whether there is gas in the interlayer. The suction port of the ventilation device is connected to the interlayer of at least one first pipe. The controller is communicated with the gas detection device and the ventilation device respectively. The controller controls the working state of the ventilation device according to a preset time interval and the detection value of the gas detection device.

[0034] When the internal combustion engine adopts the above-mentioned internal combustion engine gas supply system for gas supply, since the first pipe of the transmission pipeline adopts a double-layer structure, ventilation and / or filling of protective gas with a pressure higher than the gas pressure can be carried out in the interlayer, which can effectively prevent the gas from leaking out through the interlayer, and a sealing structure is provided between the two first end flanges that cooperate with each other on the outer peripheral side of the first gas hole and the outer peripheral side of each ventilation hole. In combination with the ventilation and / or filling of protective gas in the interlayer, a triple seal can be formed, which effectively improves the sealing problem of the pipe-to-pipe connection of the internal combustion engine gas supply system. The controller, the gas detection device and the ventilation device cooperate with each other to ventilate the interlayer regularly and quickly ventilate after the leakage point is found. While quickly eliminating the safety hazard, the location of the inner layer leakage point can be found, which is convenient for maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in 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 invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0036] Figure 1 A schematic diagram of the structure of the connection between the first pipelines of the internal combustion engine gas supply system provided by an embodiment of the present invention;

[0037] Figure 2 for Figure 1 Schematic diagram of the middle A direction;

[0038] Figure 3 A schematic structural diagram of the connection between a second pipeline and a gas valve of a gas supply system for an internal combustion engine provided in an embodiment of the present invention.

[0039] In the figure:

[0040] 100 is the first pipeline; 101 is the inner pipe; 102 is the outer pipe; 103 is the first end flange; 104 is the first gas delivery cavity; 105 is the interlayer; 106 is the first gas hole; 107 is the vent hole; 108 is the annular gas collecting groove; 109 is the sealing ring;

[0041] 200 is the second pipeline; 201 is the pipeline body; 202 is the second end flange; 203 is the second gas delivery cavity; 204 is the second gas hole;

[0042] 300 is a gas valve;

[0043] 400 is an annular negative pressure hood. DETAILED DESCRIPTION

[0044] The core of the present invention is to provide an internal combustion engine gas supply system, the structural design of which can improve the safety of the internal combustion engine gas supply system, eliminate gas leakage, and enable the vicinity of the internal combustion engine power generation device to be divided into a non-explosion hazardous area.

[0045] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0046] See also Figure 1 and Figure 2 , Figure 1A schematic diagram of the structure of the connection between the first pipelines of the internal combustion engine gas supply system provided by an embodiment of the present invention, Figure 2 for Figure 1 Schematic diagram of direction A.

[0047] An embodiment of the present invention discloses a gas supply system for an internal combustion engine. The gas supply system for an internal combustion engine includes a delivery pipeline, a gas detection device, a ventilation device, and a controller.

[0048] The delivery pipeline includes a plurality of first pipes 100 which are sealed and connected in sequence. The first pipe 100 includes an inner pipe 101, an outer pipe 102 and a first end flange 103. The inner pipe 101 forms a first gas delivery cavity 104. The outer pipe 102 is sleeved outside the inner pipe 101. An interlayer 105 is formed between the outer pipe 102 and the inner pipe 101. The first end flange 103 is connected to the ends of the inner pipe 101 and the outer pipe 102. The first end flange 103 is provided with a first gas hole 106 and a plurality of vent holes 107 which are arranged at intervals along the circumferential direction and communicate with the interlayer 105. The vent holes 107 can be arranged in one circle or in multiple circles radially from the inside to the outside. The vent holes 107 penetrate the first end flange 103 along the axial direction of the first end flange 103. It should be noted that the opening direction of the vent holes 107 can be completely parallel to the axial direction of the first end flange 103, or can be opened in a manner that is approximately parallel to the axial direction of the first end flange 103. The first gas delivery chambers 104 of two adjacent first pipelines 100 are connected through the first gas holes 106, so that the first gas delivery chambers 104 of each first pipeline 100 are connected to each other.

[0049] It is foreseeable that leakage points usually appear at flange connections. Therefore, in one embodiment of the present application, an annular gas collecting groove 108 is provided on the first end flange 103 of at least one of the two adjacent first pipes 100. The annular gas collecting groove 108 is used to facilitate the connection of the air holes 107 between the two first pipes 100, that is, the air holes 107 on the two adjacent first pipes 100 may not be aligned differently during installation, but the air holes 107 on the two first pipes 100 are connected by means of the annular gas collecting groove 108. Of course, the role of the annular gas collecting groove 108 is not limited to this. The annular gas collecting groove 108 can also collect and accommodate the gas leaked from the inner tube 101, so that the gas is gathered here, the storage capacity of the leaked gas is increased, and the detection of the gas detection device is convenient. The annular gas collecting groove 108 can be provided with one or more annular gas collecting grooves 108, and the air holes 107 of the two first end flanges 103 that cooperate with each other are connected through the annular gas collecting groove 108.

[0050] A sealing structure is arranged between the two first end flanges 103 that cooperate with each other on the outer peripheral side of the first gas hole 106 and the outer peripheral side of each ventilation hole 107. The sealing structure includes one or more sealing rings 109. At least two sealing ring grooves for accommodating the sealing rings 109 are arranged on at least one of the two first end flanges 103 that cooperate with each other. One of the sealing ring grooves is located between the first gas hole 106 and a circle of ventilation holes 107 closest to the first gas hole 106, and the other sealing ring groove is located on the outer peripheral side along a circle of ventilation holes 107 in the outermost circle. When the two first end flanges 103 that cooperate with each other are connected, the sealing ring 109 is clamped to form a seal.

[0051] The gas detection device is used to detect whether there is gas in the interlayer 105. It can be set in the interlayer 105 or on the outer tube 102, and its detection end passes through the tube wall of the outer tube 102 and enters the interlayer 105. Of course, the detection end needs to be sealed with the tube wall of the outer tube 102 to detect whether there is leaked gas in the interlayer 105.

[0052] The suction port of the ventilation device is connected to the interlayer 105 of at least one first pipe 100, and the controller is communicated with the gas detection device and the ventilation device respectively. The controller controls the working state of the ventilation device according to a preset time interval and the detection value of the gas detection device, that is, the ventilation device can be preset to be started several times within an hour to ventilate the interlayer 105, or the ventilation device can be started immediately for ventilation when the gas detection device detects gas in the interlayer 105.

[0053] According to the ventilation airflow direction of the ventilation device and the position of the gas detection device for detecting the gas composition, the location of the leak point can be quickly identified, making it easier for users to find and repair it.

[0054] Compared with the prior art, when the internal combustion engine gas supply system provided by the embodiment of the present invention supplies gas, since the first pipe 100 of the transmission pipeline adopts a double-layer structure, ventilation and / or filling of protective gas with a pressure higher than the gas pressure can be carried out in the interlayer 105, which can effectively prevent the gas from leaking out through the interlayer 105, and a sealing structure is provided between the two first end flanges 103 that cooperate with each other on the outer peripheral side of the first gas hole 106 and the outer peripheral side of each ventilation hole 107. By ventilating the interlayer 105 and / or filling with protective gas, a triple seal can be formed, which effectively improves the sealing problem of the pipe-to-pipe connection of the internal combustion engine gas supply system. The controller, the gas detection device and the ventilation device cooperate with each other to ventilate the interlayer 105 regularly and quickly ventilate after the leakage point is found. While quickly eliminating the safety hazard, the location of the inner layer leakage point can be found, which is convenient for maintenance.

[0055] In order to further reduce the possibility of leakage in the internal combustion engine gas supply system, in one embodiment of the present application, the internal combustion engine gas supply system further includes a protective gas supply device, a gas pressure detection device and an interlayer pressure detection device, wherein the protective gas supply device is connected to the interlayer 105 of at least one first pipeline 100, and is used to supply protective gas into the interlayer 105. The protective gas is a non-flammable and non-explosive gas, including but not limited to nitrogen, inert gas, etc. The protective gas supply device is communicatively connected to the controller, the gas pressure detection device is used to detect the gas pressure in the first gas delivery cavity 104, the gas pressure detection device is communicatively connected to the controller, and the interlayer pressure detection device is used to detect the pressure in the interlayer 105. The interlayer pressure detection device is communicatively connected to the controller. It should be noted that the pressure of the protective gas in the interlayer 105 is greater than the gas pressure in the first gas delivery cavity 104, and the pressure difference is used to prevent the gas from leaking outward. When a leakage point occurs, due to the high pressure of the protective gas, the protective gas will enter the first gas delivery cavity 104 and prevent the gas from leaking out. At this time, the pressure in the interlayer 105 will drop.

[0056] In this way, when the pressure in the interlayer 105 is less than or equal to the gas pressure in the first gas delivery chamber 104, it means that the ventilation device has just been ventilated, or a leakage point has occurred. At this time, the controller can control the protective gas supply device to supply protective gas into the interlayer 105 until the pressure in the interlayer 105 is greater than the gas pressure in the first gas delivery chamber 104, so as to ensure that the pressure in the interlayer 105 is always greater than the gas pressure in the first gas delivery chamber 104.

[0057] Further, when the pressure in the interlayer 105 is less than or equal to the gas pressure in the first gas delivery chamber 104, the controller first obtains the working state of the ventilation device. If the ventilation device is in a startup state when the pressure in the interlayer 105 is less than or equal to the gas pressure in the first gas delivery chamber 104, it is determined that no leakage point has occurred, and it is only necessary to control the protective gas supply device to supply protective gas into the interlayer 105 until the pressure in the interlayer 105 is greater than the gas pressure in the first gas delivery chamber 104. If the pressure in the interlayer 105 is less than or equal to the gas pressure in the first gas delivery chamber 104, the ventilation device is in an unstarted state, indicating that a leakage point has occurred. At this time, the protective gas supply device is controlled to supply protective gas into the interlayer 105 until the pressure in the interlayer 105 is greater than the gas pressure in the first gas delivery chamber 104, and the controller issues an alarm to the user to avoid excessive pressure in the first gas delivery chamber 104 and affecting the gas supply of the internal combustion engine when the protective gas continues to enter the first gas delivery chamber 104.

[0058] Preferably, in one embodiment of the present application, the protective gas supply device includes a gas cylinder and a control valve, wherein the gas cylinder stores protective gas, and the gas supply port of the gas cylinder is connected to the interlayer 105 of at least one first pipeline 100 through the control valve, the control valve is communicatively connected with the controller, and the control valve is in a normally closed state. When the pressure in the interlayer 105 is less than or equal to the gas pressure in the first gas delivery chamber 104, the controller controls the control valve to open to increase the pressure in the interlayer 105. When the pressure in the interlayer 105 reaches a preset pressure value, the controller closes the control valve.

[0059] It should be noted that the above-mentioned control valve can be only a switch valve or a flow control valve. When it is a switch valve, it only has the function of switching. When it is a flow control valve, the controller can obtain the pressure drop rate in the interlayer 105 through the interlayer pressure detection device and the built-in timer, and adjust the opening of the control valve according to the pressure drop rate, so as to avoid sudden rise and fall of pressure in the interlayer 105 and keep the pressure in the interlayer 105 stable.

[0060] Specifically, in one embodiment of the present application, the ventilation device includes an exhaust fan and a one-way valve, wherein the suction port of the exhaust fan is connected to the interlayer 105 of a first pipe 100 located at one end of the delivery pipeline through a pipeline, and the one-way valve is arranged on an outer tube 102 of a first pipe 100 located at the other end of the delivery pipeline. The one-way valve is used to unidirectionally connect the atmospheric environment and the interlayer 105 from the outside to the inside along the radial direction of the first pipe 100. When the exhaust fan is not started, the pressure in the interlayer 105 is greater than the atmospheric pressure, the one-way valve is not opened, and the interlayer 105 is isolated from the atmospheric environment. When the exhaust fan is started, the pressure in the interlayer 105 is reduced, the one-way valve opens, the atmospheric environment is connected to the interlayer 105, and it is ensured that the exhaust fan can smoothly extract the gas in the interlayer 105.

[0061] Of course, the ventilation device can also adopt other structures to further improve safety. The ventilation device includes an exhaust fan and a gas filtering and processing device. The exhaust fan directly sends the gas extracted from the interlayer 105 into the gas filtering and processing device for processing the gas. At the same time, the protective gas supply device starts to supply new protective gas into the interlayer 105. The gas processed by the gas filtering and processing device can be sent back to the protective gas supply device for recycling after it is detected that there is no residual gas.

[0062] To further optimize the above technical solution, the internal combustion engine gas supply system also includes a gas concentration detection device and an alarm device, wherein the gas concentration detection device is arranged in the interlayer 105, and is used to detect the gas concentration in the interlayer 105, the gas concentration detection device is communicatively connected to the controller, and the alarm device is communicatively connected to the controller, and the controller is used to control the alarm device to alarm and control the ventilation device to start when the gas concentration in the interlayer 105 exceeds a preset value. When the gas concentration detection device detects that the gas concentration in the interlayer 105 exceeds the standard, it means that there are many leakage points or the leakage points are large and maintenance is required. At this time, the controller controls the alarm device to alarm the user. In this way, through the dual detection of the pressure and gas concentration in the interlayer 105, the effectiveness of the sealing of the interlayer 105 can be guaranteed, and the occurrence of leakage points can be discovered in time.

[0063] It should be noted that, in one embodiment of the present application, Figure 3 As shown, the delivery pipeline also includes a second pipeline 200 and a gas valve 300. The second pipeline 200 includes a pipeline body 201 and second end flanges 202 arranged at both ends of the pipeline body 201. The second end flange 202 is basically consistent with the first end flange 103 in terms of radial dimensions and axial dimensions to facilitate docking. The difference is that the second pipeline 200 does not have an interlayer 105, so there is no vent 107 on the second end flange 202. The pipeline body 201 surrounds a second gas delivery cavity 203. The second end flange 202 is provided with a second gas hole 204 communicating with the second gas delivery cavity 203. The second end flange 202 is sealed and detachably connected to the first end flange 103, so that the first gas hole 106 is connected to the second gas hole 204, and the first pipeline 100 is docked with the second pipeline 200. The end of the second pipeline 200 away from the first pipeline 100 is sealed and detachably connected to the gas valve 300 through the second end flange 202.

[0064] In order to ensure the safety of the connection between the first pipeline 100 and the gas valve 300, in one embodiment of the present application, the internal combustion engine gas supply system further includes a negative pressure device, which includes an annular negative pressure cover 400 and a negative pressure device, wherein, Figure 3 As shown, the annular negative pressure hood 400 is used as a sealing hood and is arranged at the connection between the second pipeline 200 and the gas valve 300, so as to form a closed space isolated from the atmospheric environment at the connection between the second pipeline 200 and the gas valve 300 to prevent gas leakage here. The negative pressure device is connected to the annular negative pressure hood 400 through a pipeline, and the negative pressure device is communicated with the controller. The controller controls the working state of the negative pressure device according to preset instructions. The negative pressure device is used to generate negative pressure in the closed space enclosed by the annular negative pressure hood 400, so as to extract the gas that may leak here.

[0065] In order to improve the strength of the first pipe 100, in one embodiment of the present application, the first pipe 100 also includes a support member, which is arranged in the interlayer 105, and the support member is respectively connected to the inner pipe 101 and the outer pipe 102 to support the inner pipe 101 and the outer pipe 102 along the circumference and extension direction of the first pipe 100 to increase the strength of the first pipe 100.

[0066] Specifically, in a specific embodiment, the support member includes a plurality of annular support plates, the outer edges of the annular support plates are connected to the wall of the inner tube 101 of the outer tube 102, the inner edges of the annular support plates are connected to the wall of the outer tube 102 of the inner tube 101, the annular support plates are sequentially spaced along the extension direction of the first pipeline 100, and a plurality of connecting holes are circumferentially spaced on the annular support plates, and the connecting holes are used to prevent the annular support plates from dividing the interlayer 105 into a plurality of unconnected annular cavities.

[0067] In another specific embodiment, the support member includes a plurality of strip support plates, which extend from one end of the interlayer 105 to the other end along the extension direction of the first pipe 100, and each strip support plate is arranged at intervals along the circumference of the interlayer 105. The strip support plate is connected to the inner tube 101 wall of the outer tube 102 along the radial outer edge of the first pipe 100, and the strip support plate is connected to the outer tube 102 wall of the inner tube 101 along the radial inner edge of the first pipe 100. A plurality of connecting holes are arranged at intervals along the extension direction on the strip support plate, and the function of the connecting holes is to connect the cavities on both sides of the strip support plate.

[0068] It should be noted that the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0069] The principles and implementation methods of the present invention are described in this article using specific examples. The description of the above embodiments is only used to help understand the core idea of ​​the present invention. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present invention, the present invention can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A gas supply system for an internal combustion engine, characterized in that: include: A delivery pipeline, the delivery pipeline comprising a plurality of first pipelines (100) which are sealed and connected in sequence, the first pipeline (100) comprising an inner pipe (101), an outer pipe (102) and a first end flange (103), the inner pipe (101) enclosing a first gas delivery cavity (104), the outer pipe (102) being sleeved outside the inner pipe (101), a sandwich (105) being formed between the outer pipe (102) and the inner pipe (101), the first end flange (103) being connected to the ends of the inner pipe (101) and the outer pipe (102), the first end flange (103) being provided with a first gas hole (106) and a plurality of gas holes (106) and a plurality of gas holes (106) arranged at intervals in the circumferential direction and connected to the sandwich (104) 05) a vent hole (107) connected to the first pipe (106), the first gas delivery chambers (104) of two adjacent first pipes (100) are connected via the first gas hole (106), an annular gas collecting groove (108) is provided on the first end flange (103) of at least one of the two adjacent first pipes (100), the respective vent holes (107) of the two first end flanges (103) that match each other are connected via the annular gas collecting groove (108), and a sealing structure is provided between the two first end flanges (103) that match each other on the outer peripheral side of the first gas hole (106) and the outer peripheral side of each vent hole (107); A gas detection device, used for detecting whether there is gas in the interlayer (105); a ventilation device, wherein a suction port of the ventilation device is in communication with the interlayer (105) of at least one of the first pipes (100); A controller is respectively connected to the gas detection device and the ventilation device for communication, and the controller controls the working state of the ventilation device according to a preset time interval and a detection value of the gas detection device.

2. The internal combustion engine gas supply system according to claim 1, characterized in that: Also includes: a protective gas supply device, the protective gas supply device being in communication with the interlayer (105) of at least one of the first pipelines (100), and the protective gas supply device being in communication with the controller; A gas pressure detection device, used for detecting the gas pressure in the first gas delivery chamber (104), the gas pressure detection device being communicatively connected to the controller; An interlayer pressure detection device, used for detecting the pressure in the interlayer (105), the interlayer pressure detection device being communicatively connected to the controller; The controller is used to control the protective gas supply device to supply protective gas into the interlayer (105) until the pressure in the interlayer (105) is greater than the gas pressure in the first gas delivery chamber (104) when the pressure in the interlayer (105) is less than or equal to the gas pressure in the first gas delivery chamber (104).

3. The internal combustion engine gas supply system according to claim 2, characterized in that: The protective gas supply device comprises: A gas storage cylinder storing a protective gas; A control valve, wherein the gas supply port of the gas storage cylinder is connected to the interlayer (105) of at least one of the first pipelines (100) through the control valve, and the control valve is in communication with the controller.

4. The internal combustion engine gas supply system according to claim 2 or 3, characterized in that: The ventilation device comprises: an exhaust fan, wherein the suction port of the exhaust fan is connected to the interlayer (105) of the first pipeline (100) located at one end of the delivery pipeline through a pipeline, A one-way valve is provided on the outer tube (102) of the first pipeline (100) located at the other end of the delivery pipeline, and the one-way valve is used to conduct one-way communication between the atmospheric environment and the interlayer (105) from outside to inside along the radial direction of the first pipeline (100).

5. The internal combustion engine gas supply system according to any one of claims 1 to 3, characterized in that: Also includes: a gas concentration detection device, the gas concentration detection device being arranged in the interlayer (105) and used for detecting the gas concentration in the interlayer (105), the gas concentration detection device being communicatively connected with the controller; An alarm device is communicatively connected to the controller, and the controller is used to control the alarm device to alarm and control the ventilation device to start when the gas concentration in the interlayer (105) exceeds a preset value.

6. The internal combustion engine gas supply system according to any one of claims 1 to 3, characterized in that: The delivery pipeline further comprises a second pipeline (200) and a gas valve (300); the second pipeline (200) comprises a pipeline body (201) and second end flanges (202) arranged at both ends of the pipeline body (201); the pipeline body (201) encloses a second gas delivery cavity (203); the second end flange (202) is provided with a second gas hole (204) communicating with the second gas delivery cavity (203); the second end flange (202) is sealed and detachably connected to the first end flange (103), so that the first gas hole (106) is communicated with the second gas hole (204); and one end of the second pipeline (200) away from the first pipeline (100) is sealed and detachably connected to the gas valve (300) via the second end flange (202).

7. The internal combustion engine gas supply system according to claim 6, characterized in that: Also included is a negative pressure device, the negative pressure device comprising: an annular negative pressure cover (400), the annular negative pressure cover (400) being used for sealing and being arranged at the connection between the second pipeline (200) and the gas valve (300); A negative pressure device, the negative pressure device is connected to the annular negative pressure cover (400) via a pipeline, the negative pressure device is in communication connection with the controller, and the controller controls the working state of the negative pressure device according to preset instructions.

8. The internal combustion engine gas supply system according to any one of claims 1 to 3, characterized in that: The first pipeline (100) further comprises a support member, the support member being arranged in the interlayer (105), and the support member being respectively connected to the inner tube (101) and the outer tube (102) so as to support the inner tube (101) and the outer tube (102) along the circumferential direction and the extension direction of the first pipeline (100).

9. The internal combustion engine gas supply system according to claim 8, characterized in that: The support member comprises a plurality of annular support plates, the outer edges of the annular support plates being connected to the inner tube (101) wall of the outer tube (102), the inner edges of the annular support plates being connected to the outer tube (102) wall of the inner tube (101), the annular support plates being arranged in sequence at intervals along the extension direction of the first pipeline (100), and a plurality of communication holes being arranged at intervals along the circumferential direction on the annular support plates.

10. The internal combustion engine gas supply system according to claim 8, characterized in that: The support member comprises a plurality of strip support plates, the strip support plates extending from one end to the other end of the interlayer (105) along the extension direction of the first pipe (100), the strip support plates being arranged at intervals along the circumference of the interlayer (105), the strip support plates being connected to the inner tube (101) wall of the outer tube (102) along the radial outer edge of the first pipe (100), the strip support plates being connected to the outer tube (102) wall of the inner tube (101) along the radial inner edge of the first pipe (100), and a plurality of connecting holes being arranged at intervals along the extension direction on the strip support plates.

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