Auxiliary heating structure for preheating and starting a gas engine

Abstract

The application relates to the field of gas engine starting auxiliary equipment, in particular to a gas engine preheating starting auxiliary heating structure, which comprises a sleeve, a recess is arranged on the inner side of the sleeve, a heat conduction plate is fixedly installed on the side close to the axis of the sleeve, a heating assembly is arranged on the inner side of the recess, a controller and an inflation joint are installed on the outer side of the sleeve, the controller is connected with the heating assembly, the inflation joint is communicated with the recess, heat is uniformly conducted, the problem of local high temperature in traditional contact type heating is avoided, and the thermal deformation of engine components is prevented; meanwhile, the recess is filled with high-efficiency heat conduction medium to replace traditional air heat conduction, the heat conduction efficiency is improved and heat loss is reduced by combining the accurate regulation and control of a temperature sensor and the controller, global uniform preheating is realized, the gas atomization effect and combustion sufficiency in a low-temperature environment are improved, and the defects of concentrated heating of the heating structure or low heat conduction efficiency are solved.

Description

Technical Field

[0001] This utility model relates to the technical field of gas engine starting auxiliary equipment, specifically a gas engine preheating and starting auxiliary heating structure. Background Technology

[0002] Gas engines, with their advantages of high efficiency, environmental friendliness, and wide availability of fuel, have been widely used in various fields such as construction machinery, marine power, generator sets, and transportation, becoming an important part of energy and power systems. When gas engines start in low-temperature environments, the gas atomization effect is poor and the combustion is incomplete. Therefore, a preheating device is usually required. Preheating devices are generally installed at the fuel injector or air intake.

[0003] In existing preheating technologies, contact electric heating structures have the defects of concentrated heating and excessively high local temperatures, which can easily lead to thermal deformation of engine parts. Non-contact heating structures mostly use air as a heat transfer medium, but air has low thermal conductivity, large heat loss, and is prone to moisture and dust entering the heating cavity due to poor sealing, which affects the heating effect and structural life. Utility Model Content

[0004] In view of the above-mentioned background technology, there is a deficiency in the existing technology that is locally too high, which can easily lead to thermal deformation of engine components.

[0005] The present invention discloses a preheating and starting auxiliary heating structure for a gas engine, comprising a sleeve, a groove provided on the inner side of the sleeve, a heat-conducting plate fixedly installed on the side of the groove near the axis of the sleeve, a heating component provided on the inner side of the groove, a controller and an inflation connector installed on the outer side of the sleeve, the controller being connected to the heating component, the inflation connector communicating with the groove, a solenoid valve provided on the inflation connector, the solenoid valve being electrically connected to the controller, and sealing components provided at both ends of the sleeve.

[0006] Furthermore, the heating assembly includes a heating tube, which is sleeved on the heat-conducting plate and is configured in a spiral shape.

[0007] Furthermore, a housing is fixedly installed on the upper end of the controller, and an air supply tank is fixedly installed inside the housing. The air supply tank is connected to the air filling connector through a delivery pipe.

[0008] Furthermore, a temperature sensor is installed inside the sleeve, and a temperature sensor and a pressure sensor are installed inside the groove. The temperature sensor, the temperature sensor, and the pressure sensor are all electrically connected to the controller.

[0009] Furthermore, the sealing assembly includes a sealing cap, the end of which near the sleeve is stepped, the sealing cap is threaded to the sleeve, a sealing ring is installed on the inner wall of the sleeve, and the sealing cap is inclined near the sealing ring.

[0010] Furthermore, a baffle is fixedly installed on the outer ring of the sleeve, and a spring washer is provided between the baffle and the sealing cap.

[0011] Furthermore, a thermally conductive silicone grease layer is coated on the contact surface between the heating tube and the heat-conducting plate, and the spiral spacing of the heating tube is uniformly arranged along the axial direction of the sleeve.

[0012] Furthermore, a one-way valve integrally formed with the delivery pipe is provided at the air outlet of the air replenishment tank, and the one-way valve is directed from the air replenishment tank to the air filling connector.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. This utility model achieves uniform heat conduction through a combination structure of a spiral heating tube, a thermally conductive silicone grease layer, and a heat-conducting plate, avoiding the problem of localized high temperatures in traditional contact heating and preventing thermal deformation of engine components. At the same time, the groove is filled with a high-efficiency thermally conductive medium to replace traditional air heat conduction. Combined with the precise control of temperature sensors and controllers, it improves thermal conductivity, reduces heat loss, achieves uniform preheating across the entire area, improves the atomization effect and combustion completeness of gas in low-temperature environments, and solves the defects of concentrated heating or low thermal conductivity in heating structures.

[0014] 2. This utility model utilizes a multi-layer sealing structure consisting of a stepped sealing cap, a sealing ring, and a spring gasket, combined with a one-way valve design in the air supply tank, to achieve reliable sealing of the heating chamber. This effectively prevents moisture and dust from entering the groove, avoiding the impact of poor sealing on heating effect and structural lifespan. At the same time, through the linkage of pressure sensor, solenoid valve, and controller, the internal pressure of the heating chamber can be stabilized, further ensuring the working stability of the heating component and extending the service life of the overall structure. Attached Figure Description

[0015] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings: Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is an exploded view of the present invention; Figure 3 This is a front view of the present invention; Figure 4 This is a cross-sectional view of the present invention; Figure 5 This utility model Figure 4 Enlarged diagram of point A in the middle.

[0016] In the diagram: 1. Sleeve; 2. Groove; 3. Heat-conducting plate; 4. Heating tube; 5. Controller; 6. Inflation connector; 7. Solenoid valve; 8. Housing; 9. Air supply tank; 10. Delivery pipe; 11. Sealing cap; 12. Sealing ring; 13. Baffle; 14. Spring washer; 15. Temperature sensor one; 16. Temperature sensor two; 17. Pressure sensor. Detailed Implementation

[0017] The following illustrations will reveal several embodiments of the present invention. For clarity, many physical details will be described in the following description. However, it should be understood that these physical details should not be used to limit the present invention. That is, in some embodiments of the present invention, these physical details are not essential. Furthermore, for the sake of simplicity, some conventional structures and components will be shown in a simple schematic manner in the illustrations.

[0018] Please see Figure 1 , Figure 4 As shown, the gas engine preheating and starting auxiliary heating structure of this utility model includes a sleeve 1. The sleeve 1 is made of ZL106 cast aluminum and has two clamping lugs on the outer ring. Stainless steel clamps are used to ensure that there is no gap between the sleeve 1 and the engine component contact surface. A groove 2 is provided on the inner side of the sleeve 1. A heat-conducting plate 3 is fixedly installed on the side of the groove 2 near the axis of the sleeve 1. The heat-conducting plate 3 is made of 6061 aluminum alloy and is fixed to the inner wall of the sleeve 1 by argon arc welding.

[0019] See Figure 4 As shown, a heating assembly is provided inside the groove 2. The heating assembly includes a heating tube 4, which is sleeved on the heat-conducting plate 3. The heating tube 4 is made of nickel-chromium alloy and has a high-temperature resistant insulating coating sprayed on its surface. The heating tube 4 is spiral-shaped, and a thermally conductive silicone grease layer is coated on the contact surface between the heating tube 4 and the heat-conducting plate 3. The spiral spacing of the heating tube 4 is uniformly set along the axial direction of the sleeve 1.

[0020] See Figure 1 , Figure 2 , Figure 3 As shown, a controller 5 and an inflation connector 6 are installed on the outside of the sleeve 1. The controller 5 is connected to the heating component, and the inflation connector 6 is connected to the groove 2. A solenoid valve 7 is installed on the inflation connector 6, and the solenoid valve 7 is electrically connected to the controller 5. A housing 8 is fixedly installed on the upper end of the controller 5, and an air supply tank 9 is fixedly installed inside the housing 8. The air supply tank 9 is made of 304 stainless steel in one piece. The medium in the air supply tank 9 is a high thermal conductivity inert gas, preferably dry nitrogen, which has strong chemical stability, is non-corrosive, and has low cost.

[0021] See Figure 2 , Figure 4 As shown, the air supply tank 9 and the air filling connector 6 are connected by a delivery pipe 10. The delivery pipe 10 is made of polytetrafluoroethylene and wrapped with a high-temperature resistant fiberglass sleeve. The connector is a compression fitting. A one-way valve is integrally formed with the delivery pipe 10 at the air outlet of the air supply tank 9. The one-way valve is directed from the air supply tank 9 to the air filling connector 6. A temperature sensor 15 is installed inside the sleeve 1. The temperature sensor 15 is a PT100 platinum resistance sensor and is fixed to the inner wall of the sleeve 1 by threads.

[0022] See Figure 4 As shown, a second temperature sensor 16 and a pressure sensor 17 are installed inside the groove 2. The second temperature sensor 16 is an NTC thermistor. The probe is wrapped with a thermally conductive silicone sleeve and embedded in the mounting hole reserved in the inner wall of the groove 2, directly contacting the thermally conductive medium. The pressure sensor 17 is threaded to the groove 2 through a brass connector, and a sealing gasket is installed at the connector. The first temperature sensor 15, the second temperature sensor 16, and the pressure sensor 17 are all electrically connected to the controller 5. Both ends of the sleeve 1 are provided with sealing components, including sealing caps 11, which are made of engineering plastic.

[0023] See Figure 4 , Figure 5 As shown, the end of the sealing cap 11 near the sleeve 1 is set in a stepped shape. The sealing cap 11 is threaded to the sleeve 1. A sealing ring 12 is installed on the inner wall of the sleeve 1. The sealing ring 12 is made of fluororubber. The sealing cap 11 is inclined near the sealing ring 12. A baffle 13 is fixedly installed on the outer ring of the sleeve 1. A spring washer 14 is provided between the baffle 13 and the sealing cap 11. The spring washer 14 is made of SUS304 stainless steel to prevent the seal from loosening due to engine vibration.

[0024] The implementation principle is as follows: When the user triggers the preheating command, the controller 5 starts the heating component, and the spiral heating tube 4 is energized and heats up; the heating tube 4 conducts heat evenly to the heat conduction plate 3 through the thermally conductive silicone grease layer; the heating tube 4 and the heat conduction plate 3 diffuse the heat to the high-efficiency thermally conductive medium in the groove 2, and replace the traditional air heat conduction through the whole-area conduction of the medium, reducing heat loss. The heat is finally transferred to the target components such as the engine fuel injector or the air intake through the heat conduction plate 3 and the inner side of the sleeve 1, and uniform preheating is started. During the preheating process, temperature sensor 15 monitors the temperature of the inner side of the sleeve 1 close to the engine component in real time, and temperature sensor 16 simultaneously monitors the temperature of the heat-conducting medium in the groove 2. Both sensors feed the signals back to the controller 5 in real time. When either sensor detects that the temperature is close to the thermal deformation threshold of the component, the controller 5 automatically adjusts the power supply of the heating tube 4 to reduce the risk of local heat concentration. If the temperature is lower than the preheating requirement, the controller 5 increases the power of the heating tube 4 to ensure uniform temperature throughout the entire area and improve gas atomization and combustion completeness. Pressure sensor 17 continuously collects the pressure signal in groove 2 and feeds it back to controller 5. If the pressure exceeds the limit due to the thermal expansion of the medium, controller 5 controls solenoid valve 7 to open appropriately to release the excess medium. If the pressure is lower than the set lower limit, controller 5 opens the check valve to replenish the heat-conducting medium through air tank 9 to maintain stable cavity pressure. When temperature sensor 15 detects that the temperature has reached the engine low-temperature start standard, controller 5 issues a preheating completion prompt and shuts off heating tube 4. Air tank 9 is in standby mode, and pressure sensor 17 continuously monitors the cavity pressure. If pressure fluctuation occurs, controller 5 immediately links solenoid valve 7 and check valve for adjustment. The preheating structure stops working after the engine starts successfully, remains sealed and in standby mode, waiting for the next start-up requirement.

[0025] The above description is merely an embodiment of this utility model and is not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this utility model should be included within the scope of the claims of this utility model.

Claims

1. A preheating and starting auxiliary heating structure for a gas engine, comprising a sleeve (1), characterized in that: The sleeve (1) has a groove (2) on its inner side. A heat-conducting plate (3) is fixedly installed on the side of the groove (2) near the axis of the sleeve (1). A heating component is provided on the inner side of the groove (2). A controller (5) and an inflation connector (6) are installed on the outer side of the sleeve (1). The controller (5) is connected to the heating component. The inflation connector (6) is connected to the groove (2). A solenoid valve (7) is provided on the inflation connector (6). The solenoid valve (7) is electrically connected to the controller (5). Sealing components are provided at both ends of the sleeve (1).

2. The preheating and starting auxiliary heating structure for a gas engine according to claim 1, characterized in that: The heating assembly includes a heating tube (4), which is sleeved on the heat-conducting plate (3) and is spiral in shape.

3. The preheating and starting auxiliary heating structure for a gas engine according to claim 1, characterized in that: The controller (5) is fixedly mounted with a housing (8) on its upper end. An air supply tank (9) is fixedly mounted inside the housing (8). The air supply tank (9) is connected to the air filling connector (6) through a delivery pipe (10).

4. The preheating and starting auxiliary heating structure for a gas engine according to claim 1, characterized in that: Temperature sensor 1 (15) is installed inside the sleeve (1), and temperature sensor 2 (16) and pressure sensor (17) are installed inside the groove (2). Temperature sensor 1 (15), temperature sensor 2 (16) and pressure sensor (17) are all electrically connected to the controller (5).

5. The preheating and starting auxiliary heating structure for a gas engine according to claim 1, characterized in that: The sealing assembly includes a sealing cap (11), the end of the sealing cap (11) near the sleeve (1) is set in a stepped shape, the sealing cap (11) is threadedly connected to the sleeve (1), a sealing ring (12) is installed on the inner wall of the sleeve (1), and the sealing cap (11) is inclined near the sealing ring (12).

6. The auxiliary heating structure for preheating and starting a gas engine according to claim 5, characterized in that: A baffle (13) is fixedly installed on the outer ring of the sleeve (1), and a spring washer (14) is provided between the baffle (13) and the sealing cap (11).

7. The auxiliary heating structure for preheating and starting a gas engine according to claim 2, characterized in that: The contact surface between the heating tube (4) and the heat-conducting plate (3) is coated with a thermally conductive silicone grease layer, and the spiral spacing of the heating tube (4) is uniformly arranged along the axial direction of the sleeve (1).

8. The preheating and starting auxiliary heating structure for a gas engine according to claim 3, characterized in that: The air outlet of the air tank (9) is provided with a one-way valve integrally formed with the delivery pipe (10), and the one-way valve is directed from the air tank (9) to the air filling connector (6).

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