Indicator valve, engine blowing system and control method of engine blowing system

Abstract

The invention discloses an indicator valve, an engine car blowing system and a control method of the engine car blowing system, and belongs to the technical field of engines, the indicator valve comprises a shell provided with an air inlet, an air outlet and an airflow channel, and a step surface is formed on the inner wall of the airflow channel; the valve element is arranged in the shell in a sliding mode, a containing cavity is defined by the valve element and the shell, the containing cavity communicates with the air inlet and the airflow channel, and part of the valve element is embedded into the airflow channel; the valve element has a closed state and an open state, and in the closed state, the valve element is configured to be connected with the step face in a sealed mode so as to isolate the air outlet and the airflow channel. The gas inlet is formed in the indicator valve, compressed gas is conveyed into the gas inlet through other gas source devices, the compressed gas can push the valve element upwards, the valve element and the step face which are originally connected in a sealed mode are separated, then the indicator valve can be opened, conveying of the compressed gas is stopped, the indicator valve can be closed, manual opening and closing are not needed, and the working efficiency is improved. And the opening and closing difficulty of the indicator valve on a large engine is reduced.

Description

Technical Field

[0001] This application relates to the field of engine technology, and in particular to a power indicator valve, an engine blowing system, and a control method thereof. Background Technology

[0002] In high-power, medium- and low-speed engines used in ships, locomotives, and stationary power plants, after long-term shutdowns, coolant, lubricating oil, or fuel may seep into the cylinders due to seal failure, temperature difference condensation, or pipeline siphoning. If starting is required, the indicator valves on each cylinder must be manually opened to purge the liquid from the cylinders. For large engines with many cylinders, manually opening and closing the indicator valves is cumbersome and inefficient. Summary of the Invention

[0003] This application provides an indicator valve, an engine blowing system, and a control method thereof, aiming to solve the technical problem of the difficulty in switching the indicator valve on a large engine.

[0004] To achieve the above objectives, according to a first aspect of this application, a power indicator valve is provided, comprising: The housing has an air inlet, an air outlet, and an airflow channel, wherein the inner wall of the airflow channel has a stepped surface; The valve core is slidably disposed within the housing and forms a receiving cavity with the housing. The receiving cavity is connected to the air inlet and the airflow channel respectively, and a portion of the valve core is embedded in the airflow channel. The valve core has a closed state and an open state: in the closed state, the valve core is configured to be sealed to the stepped surface to isolate the air outlet and the airflow passage; in the open state, the valve core is configured to be pushed by gas delivered to the receiving cavity by the air inlet to connect the air outlet and the airflow passage.

[0005] Optionally, the airflow channel includes a first air chamber, a second air chamber, and a transition chamber that are connected to each other. The first air chamber is connected to the air outlet. The inner diameter of the first air chamber is larger than the inner diameter of the second air chamber. The first air chamber is connected to the second air chamber through the transition chamber. The inner wall surface of the transition chamber is the stepped surface.

[0006] Optionally, along the direction from the receiving cavity to the airflow channel, the inner diameter of the transition cavity gradually decreases, the bottom end of the valve core has a blocking portion, and along the direction from the receiving cavity to the airflow channel, the outer diameter of the blocking portion gradually decreases. In the closed state, the blocking portion is embedded in the transition cavity and is sealed to the stepped surface.

[0007] Optionally, the indicator valve further includes an interface component, one end of which is embedded in the air outlet and detachably connected to the housing. The interface component is used to connect the housing to the pipeline assembly.

[0008] Optionally, the interface assembly has an exhaust passage and a mounting cavity communicating with the exhaust passage; The indicator valve also includes a detection component, which is disposed in the mounting cavity and is used to detect the gas passing through the exhaust channel.

[0009] Optionally, the detection component integrates one or more of the following: a pressure sensor, a humidity sensor, a combustible gas sensor, and a liquid detection sensor.

[0010] Optionally, the indicator valve further includes an elastic portion, which, in the closed state, abuts against the top of the valve core so that the valve core abuts against the stepped surface.

[0011] According to a second aspect of this application, an engine blowing system is provided, comprising: engine; The power indicator valves described in any one of the above-mentioned methods, each of the power indicator valves being connected to a cylinder on the engine; The gas path assembly is connected to the air inlet of each of the multiple indicator valves and is used to supply gas to the air inlet; A control component is disposed on the engine and electrically connected to the engine, and the control component is electrically connected to a detection component on each of the indicator valves; The engine has a blow-up state, in which the air circuit assembly is configured to deliver gas to the air inlet so that the valve core of the indicator valve is in the open state, and the gas in the cylinder can be discharged through the airflow passage and outlet of the indicator valve.

[0012] Optionally, the gas path assembly includes: The valve body is electrically connected to the control assembly, and the valve body is connected to the air inlet of each of the indicator valves respectively; The pipeline section is connected to the valve body section and is used to supply gas to the valve body section.

[0013] Optionally, the valve body includes: Multiple valve bodies are electrically connected to the control assembly, with the inlet side of each valve body connected to the pipeline section and the outlet side of each valve body connected to the air inlet of one of the indicator valves.

[0014] According to a third aspect of this application, a control method for an engine blowing system is also provided, applied to the engine blowing system described in any one of the above-mentioned methods, the control method comprising: The control components determine whether the engine needs to enter the blowing state based on the blowing requirements; When the engine blowing system meets the blowing requirements, the control component determines whether the blowing conditions are met. When the engine blowing system meets the blowing conditions, the control component controls the air circuit component of the engine blowing system to deliver gas to the air inlet of the indicator valve, so that the valve core of the indicator valve is in the open state. The control component controls the engine to enter the blowing state, and the detection component on the indicator valve detects the substance blown out of the engine cylinder.

[0015] Optionally, the control method further includes a detection and judgment step, the detection and judgment step including: When the detection component detects the substance blown out by the engine, if it detects liquid or combustible gas, the control component issues an alarm and displays the corresponding engine cylinder. If no liquid or combustible gas is detected, the control component controls the gas circuit component to shut down, and the blowing state ends.

[0016] Optionally, the engine blowing requirements include the engine's shutdown time exceeding a limit, the detection results of the detection component being abnormal when the engine is in a stopped state, and the need for manual engine blowing.

[0017] Optionally, the blowing conditions include starting air pressure, pre-supply lubricating oil pressure, starting motor speed, and turning mechanism engagement.

[0018] Optionally, the control method further includes a burst pressure detection step, the burst pressure detection step comprising: Connect the burst pressure measuring device to the indicator valve; The control component controls the gas circuit component to deliver gas to the inlet of the indicator valve, so that the valve core of the indicator valve is in the open state, and the gas in the cylinder enters the explosion pressure detection device through the indicator valve. Determine whether the measurement result of the explosion pressure measuring device is correct.

[0019] The indicator valve of this application embodiment includes: a housing having an air inlet, an air outlet, and an airflow passage, the inner wall of which has a stepped surface; a valve core slidably disposed within the housing and forming a receiving cavity with the housing, the receiving cavity communicating with the air inlet and the airflow passage respectively, a portion of the valve core being embedded in the airflow passage; the valve core has a closed state and an open state: in the closed state, the valve core is configured to be sealed and connected with the stepped surface to isolate the air outlet and the airflow passage; in the open state, the valve core is configured to be pushed by gas supplied to the receiving cavity by the air inlet to connect the air outlet and the airflow passage. By providing an air inlet on the indicator valve, compressed gas is supplied to the air inlet through another gas source device, allowing the compressed gas to push the valve core upward, separating the originally sealed valve core from the stepped surface, thus opening the indicator valve; stopping the supply of compressed gas closes the indicator valve, eliminating the need for manual switching, reducing the difficulty of switching the indicator valve on large engines, simplifying operation, and improving efficiency. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0022] Figure 1 This is a schematic diagram of the structure of the indicator valve provided in an exemplary embodiment of this disclosure, wherein the valve core is in the closed state; Figure 2 This is a schematic diagram of the structure of the indicator valve provided in an exemplary embodiment of this disclosure, wherein the valve core is in the open state; Figure 3 This is a schematic diagram of the structure of the housing provided in an exemplary embodiment of this disclosure; Figure 4 This is provided in the exemplary embodiments of this disclosure. Figure 2 Enlarged view of a portion of area A in the middle; Figure 5 This is a schematic diagram of the connection between the indicator valve and the cylinder provided in an exemplary embodiment of this disclosure; Figure 6 This is a schematic diagram of the engine blowing system provided in an exemplary embodiment of this disclosure; Figure 7 This is a schematic diagram of the structure connecting multiple indicator valves and pneumatic circuit components provided in an exemplary embodiment of this disclosure; Figure 8 This is a flowchart illustrating the control method of the engine blowing system provided in an exemplary embodiment of this disclosure.

[0023] Explanation of reference numerals in the attached figures: 10-Housing; 11-Inlet; 12-Outlet; 13-Airflow passage; 131-Stepped surface; 132-First air chamber; 133-Second air chamber; 134-Transition chamber; 20-Valve core; 21-Receiving chamber; 22-Blocking part; 30-Interface assembly; 31-Exhaust passage; 32-Mounting chamber; 40-Detection assembly; 50-Elastic part; 60-Cylinder; 70-Air circuit assembly; 71-Valve body; 711-Valve body; 72-Pipeline; 80-Control assembly. Detailed Implementation

[0024] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0025] In high-power, medium- and low-speed engines used in ships, locomotives, and stationary power plants, after long-term shutdowns, coolant, lubricating oil, or fuel may seep into the cylinders due to seal failure, temperature difference condensation, or pipeline siphoning. If started directly, the incompressible liquid column will generate "liquid slugging" as the piston moves upward, causing momentary overloads to critical components such as connecting rods, crankshafts, and cylinder heads, potentially leading to crankshaft breakage or cylinder block explosion. Therefore, the traditional method is to manually open the indicator valves (or indicator cocks) of each cylinder, manually rotate the engine 1-2 turns, allowing the piston to move upward and spray liquid out of the indicator valves; then stop the fuel supply, press the start button, and let the engine rotate under the drive of the motor to blow out the residual liquid; then close the indicator valves and perform a normal start. Traditional indicator valves only serve as interfaces for manually measuring cylinder pressure and indicator diagrams; their structure is a manual cock or needle valve, with a single function and lack of automation interfaces. In recent years, although some manufacturers have integrated indicator valves with pressure sensors to achieve online cylinder pressure monitoring, manual operation is still required. They cannot automatically open during the blowdown process to create a drainage path, nor can they instantly relieve pressure in emergencies (such as abnormal cylinder pressure increases) to protect the crankshaft and connecting rod mechanism. Therefore, for large engines, due to their large crankshaft inertia and numerous cylinders, manually operating the indicator valve is cumbersome, time-consuming, and labor-intensive. It is also difficult for humans to continuously and uniformly rotate the indicator valve, resulting in low efficiency in opening and closing.

[0026] Please see Figure 1 and Figure 2 This application provides a power indicator valve, including a housing 10 and a valve core 20.

[0027] The housing 10 has an air inlet 11, an air outlet 12, and an airflow passage 13. The inner wall of the airflow passage 13 has a stepped surface 131. The valve core 20 is slidably disposed within the housing 10 and forms a receiving cavity 21 with the housing 10. The receiving cavity 21 communicates with both the air inlet 11 and the airflow passage 13. A portion of the valve core 20 is embedded within the airflow passage 13. The valve core 20 has a closed state and an open state: in the closed state, the valve core 20 is configured to be sealed to the stepped surface 131 to isolate the air outlet 12 and the airflow passage 13; in the open state, the valve core 20 is configured to be pushed by the gas delivered to the receiving cavity 21 by the air inlet 11 to connect the air outlet 12 and the airflow passage 13.

[0028] Understandably, the indicator valve has an air inlet 11 and a receiving cavity 21 connected to the air inlet 11. The receiving cavity 21 is formed by the valve core 20 and the housing 10. Since the valve core 20 can slide up and down inside the housing 10, the volume of the receiving cavity 21 also changes. An external air source device is connected to the air inlet 11 to supply compressed gas, allowing the compressed gas to enter the receiving cavity 21. Because the upper part of the valve core 20 is spaced apart from the bottom wall of the receiving cavity 21, the volume of the receiving cavity 21 is always greater than zero, facilitating the entry of compressed gas and also facilitating the compressed gas to push the valve core 20 upward.

[0029] The valve core 20 is subjected to the compressive force of the elastic part 50. In the closed state, the elastic part 50 abuts against the top of the valve core 20, causing the valve core 20 to abut against the stepped surface 131, forming a sealed connection. When the compressed gas in the receiving cavity 21 pushes the valve core 20 upward, the valve core 20 compresses the elastic part 50 upward, causing the elastic part 50 to contract under force. The elastic part 50 can be a spring, sheet metal, or other elastic structure. Under the push of the compressed gas, the originally sealed valve core 20 separates from the stepped surface 131, allowing the airflow channel 13 to connect with the air outlet 12. Figure 5 As shown, the indicator valve is installed on the cylinder 60. The airflow channel 13 is connected to the cavity inside the cylinder 60. When the valve core 20 is in the closed state and the valve core 20 is sealed to the stepped surface 131, the gas in the cavity inside the cylinder 60 cannot be discharged. When the valve core 20 is in the open state, the valve core 20 moves upward and separates from the stepped surface 131. The airflow channel 13 is connected to the air outlet 12, and the gas in the cylinder 60 can be discharged through the airflow channel 13 and the air outlet 12.

[0030] This structure, by setting an air inlet 11 on the indicator valve, supplies compressed gas to the air inlet 11 through other air source devices, so that the compressed gas can push the valve core 20 upward, separating the originally sealed valve core 20 from the stepped surface 131, thus opening the indicator valve and stopping the supply of compressed gas, which in turn closes the indicator valve. No manual switching is required, reducing the difficulty of opening and closing the indicator valve on large engines.

[0031] Please see Figure 3 In conjunction with the above embodiments, in some embodiments, the airflow channel 13 includes a first air chamber 132, a second air chamber 133 and a transition chamber 134 that are connected to each other. The first air chamber 132 is connected to the air outlet 12. The inner diameter of the first air chamber 132 is larger than the inner diameter of the second air chamber 133. The first air chamber 132 is connected to the second air chamber 133 through the transition chamber 134. The inner wall surface of the transition chamber 134 is a stepped surface 131.

[0032] It is understood that the first air chamber 132, the transition chamber 134, and the second air chamber 133 in the airflow channel 13 are arranged vertically. When the valve core 20 is in the closed state, the bottom end of the valve core 20 passes through the first air chamber 132 into the transition chamber 134 and is sealed to the inner wall of the transition chamber 134. The inner diameter of the first air chamber 132 is larger than the inner diameter of the second air chamber 133, which facilitates the valve core 20 to cover the upper opening of the second air chamber 133. This prevents gas in the cylinder 60 from entering the air outlet 12 through the airflow channel 13 when the valve core 20 is in the closed state.

[0033] Please see Figure 4 In conjunction with the above embodiments, in some embodiments, the inner diameter of the transition cavity 134 gradually decreases along the direction from the receiving cavity 21 to the airflow channel 13, and the bottom end of the valve core 20 has a blocking part 22. The outer diameter of the blocking part 22 gradually decreases along the direction from the receiving cavity 21 to the airflow channel 13. In the closed state, the blocking part 22 is embedded in the transition cavity 134 and is sealed to the stepped surface 131.

[0034] Understandably, the inner diameter of the transition cavity 134 is L1, and the outer diameter of the blocking part 22 is L2. Both dimensions gradually decrease along the direction from the receiving cavity 21 to the airflow channel 13. Furthermore, the inner wall surface of the transition cavity 134 and the outer surface of the blocking part 22 fit together perfectly, and the shapes of their connecting surfaces are identical, which facilitates a sealed connection. Since both connecting surfaces are beveled, similar to the structure of a bottle neck and stopper, the sealing effect is improved, the pressure inside the cylinder 60 is sealed, and the engine's operational safety is ensured.

[0035] Please see Figure 1In conjunction with the above embodiments, in some embodiments, the indicator valve further includes an interface component 30, one end of which is embedded in the air outlet 12 and is detachably connected to the housing 10. The interface component 30 is used to connect the housing 10 to the pipeline assembly.

[0036] Understandably, the interface assembly 30 and the housing 10 are detachably connected, and can be connected via threads, snaps, or other means, facilitating the replacement and maintenance of the interface assembly 30. The air outlet 12 can be a standardized interface for easy connection with the interface assembly 30. The interface assembly 30 connects the housing 10 to the pipeline assembly. When the valve core 20 is open, the gas discharged from the cylinder 60 can be transported to the pipeline assembly through the air outlet 12 and the interface assembly 30, and the pipeline assembly then transports the discharged gas or other substances to the corresponding location.

[0037] Please see Figure 1 In conjunction with the above embodiments, in some embodiments, the interface component 30 has an exhaust passage 31 and a mounting cavity 32 communicating with the exhaust passage 31. The indicator valve also includes a detection component 40, which is disposed in the mounting cavity 32 and is used to detect the gas passing through the exhaust passage 31.

[0038] Understandably, the gas or other substances discharged through the outlet 12 can enter the exhaust passage 31 of the interface assembly 30 and be transported to the pipeline assembly through the exhaust passage 31. The interface assembly 30 also has a mounting cavity 32, in which the detection assembly 40 can be installed. Since the mounting cavity 32 is connected to the exhaust passage 31, the detection assembly 40 can detect the gas or other substances passing through the exhaust passage 31, which is equivalent to detecting the gas or other substances inside the cylinder 60. The detection result can be used to determine whether the cylinder 60 is working properly.

[0039] The detection component 40 integrates one or more of the following: a pressure sensor, a humidity sensor, a combustible gas sensor, and a liquid detection sensor. The types of sensors can be increased as needed. These sensors can detect the air pressure inside the cylinder 60, the humidity inside the cylinder 60, and whether there is combustible gas or liquid inside the cylinder 60, in order to determine whether blow-through or other operations are required.

[0040] Please see Figure 1 and Figure 6 This application also provides an engine blowing system, including an engine, a plurality of indicator valves as described above, a pneumatic circuit assembly 70, and a control assembly 80.

[0041] Each indicator valve is connected to a cylinder 60 on the engine. The air passage assembly 70 is connected to the inlet 11 of each of the indicator valves to supply gas to the inlet 11. A control assembly 80 is located on and electrically connected to the engine, and is electrically connected to the detection assembly 40 on each indicator valve. The control assembly 80 is an electronic control unit on the engine and may include a microprocessor, memory, input interface, output interface, and power module. In a blow-up state, the air passage assembly 70 is configured to supply gas to the inlet 11, causing the valve core 20 of the indicator valve to be open, allowing gas in cylinder 60 to be discharged through the airflow passage 13 and outlet 12 of the indicator valve. Figure 6 The dashed lines in the diagram represent electrical wires used to transmit electrical signals.

[0042] Understandably, in the engine blow-off system, if the engine needs to be blown off, the air circuit assembly 70 can supply compressed gas to the air inlet 11 of each indicator valve. The air circuit assembly 70 contains an air cylinder, which can serve as a gas source for supplying compressed gas. The on / off state of the air circuit assembly 70 is controlled by the control assembly 80. After the compressed gas supplied by the air circuit assembly 70 enters the receiving cavity 21 of the indicator valve, it pushes the valve core 20 upwards, causing the valve core 20 to separate from the stepped surface 131 on the inner wall of the airflow passage 13, thus connecting the airflow passage 13 to the outlet 12. The control assembly 80 controls the engine to enter the blow-off state, and the cylinders 60 on the engine operate, blowing out internal gases or other substances. The blown-out gases or other substances enter the exhaust passage 31 of the interface assembly 30 through the airflow passage 13 and the outlet 12. The discharged gases or other substances can be detected by the detection assembly 40 installed in the mounting cavity 32.

[0043] Please see Figure 6 and Figure 7 In conjunction with the above embodiments, in some embodiments, the pneumatic assembly 70 includes a valve body portion 71 and a pipeline portion 72.

[0044] The valve body 71 is electrically connected to the control assembly 80, and is connected to the air inlet 11 of each indicator valve. The pipeline 72 is connected to the valve body 71 and is used to supply gas to the valve body 71.

[0045] It is understandable that the delivery of compressed gas can be controlled by opening and closing the valve body 71. The valve body 71 can be a valve body 711, which can be a solenoid valve, such as... Figure 7 As shown, the inlets 11 of multiple indicator valves are connected to the outlet side of a valve body 711. The opening and closing of multiple indicator valves can be controlled by a single valve body 711, and the opening and closing states of the multiple indicator valves are synchronized. Figure 6As shown, the valve body 711 may include multiple valve bodies 711. The air inlet 11 of each indicator valve is connected to the outlet side of a valve body 711. Each valve body 711 can control the opening and closing of an indicator valve. This structure can improve the independence of the indicator valve. The state of the corresponding indicator valve can be changed as needed, without the need for the state of all indicator valves to be changed synchronously. This facilitates the blowing and other operations of a single cylinder 60.

[0046] This application embodiment also provides a control method for an engine blowing system, applied to the engine blowing system described above. The control method includes the following steps: S11: Control component 80 determines whether the engine needs to enter the blowing state based on the blowing requirements; S12: When the engine blowing system meets the blowing requirements, the control component 80 determines whether the blowing conditions are met. S13: When the engine blowing system meets the blowing conditions, the control component 80 controls the air circuit component 70 of the engine blowing system to deliver gas to the air inlet 11 of the indicator valve so that the valve core 20 of the indicator valve is in the open state. S14: The control component 80 controls the engine to enter the blowing state, and the detection component 40 on the indicator valve detects the substance blown out of the engine cylinder 60.

[0047] Understandably, when the engine is stopped, the control component 80 can monitor the detection values ​​of various sensors in the detection component 40 or on the engine itself to determine whether each cylinder 60 of the engine is in a normal state. The detection component 40, installed in the mounting cavity 32 of the indicator valve, can detect the environmental parameters inside the engine cylinder 60 when the valve core 20 is in the open state. This allows for the periodic collection of data such as pressure, humidity, and combustible gas levels within the cylinder 60 during engine shutdown, and the rapid transmission of this data to the control component 80. The control component 80 performs comprehensive weighted processing on the sensor data to preliminarily determine whether there is liquid in the cylinder 60, providing a basis for automatic engine blow-off detection. Therefore, the engine system can automatically open the indicator valve according to a set program to achieve automatic parameter monitoring and collection. This method provides early warning and detection of leaks such as water, diesel, methanol, ammonia, and hydrogen in the cylinder 60 after engine shutdown.

[0048] In other words, the control component 80 determines whether engine blowing is needed based on the detection results of various sensors when the engine is stopped, or based on the duration of engine shutdown, or based on manual engine blowing requirements. Automatic engine blowing can be performed when any of the aforementioned requirements are met. Specifically: when the control component 80 detects that the combined weighted data from the sensors exceeds a specified limit, it will first perform automatic engine blowing before starting the engine; when the engine has been stopped for more than a limited time, it will first perform automatic engine blowing before starting the engine (the time limit can be modified according to different engine models); when the operator needs to perform engine blowing, the engine will also perform automatic engine blowing.

[0049] Before the engine performs the blow-up action, the control component 80 also needs to determine whether the engine has the conditions for blow-up, such as starting air pressure, pre-supply lubricating oil pressure, starter motor speed, and turning mechanism engagement.

[0050] Once the conditions for blow-up are met, the control unit 80 will issue a command to execute the blow-up process. First, the indicator valve is opened: the control unit 80 controls the piping section 72 and valve body section 71 in the air circuit assembly 70 to deliver compressed gas to the inlet 11 of the indicator valve. The compressed gas enters the indicator valve, pushing the valve core 20 upwards against the elastic force of the elastic section 50, separating the valve core 20 from the stepped surface 131. This connects the airflow channel 13 and the outlet 12, allowing gas in the cylinder 60 to exit through the airflow channel 13 and outlet 12 of the indicator valve. This completes the first step of the blow-up process: opening the indicator valve. Next, the control unit 80 issues a command to open the starter motor solenoid valve and controls the starting air pressure within the corresponding blow-up pressure range. The starter motor drives the crankshaft to rotate, expelling gas from the cylinder 60 during piston upward movement.

[0051] An interface assembly 30 is installed at the outlet 12 of the indicator valve. When the detection assembly 40 installed on the interface assembly 30 detects combustible gas or liquid in the exhaust passage 31, the control assembly 80 will automatically identify the cylinder 60 where the leak has occurred and issue an alarm message indicating which cylinder 60 has an abnormal leak. If no combustible gas or liquid is detected, the engine blowing state ends. After the engine blowing state ends, the control assembly 80 issues a command to close the engine start solenoid valve and the valve body 71 on the air circuit assembly 70.

[0052] Please see Figure 8 In conjunction with the above embodiments, in some embodiments, the control method further includes a burst pressure detection step, which includes: Connect the burst pressure measuring device to the indicator valve; The control component 80 controls the gas circuit component 70 to deliver gas to the inlet 11 of the indicator valve, so that the valve core 20 of the indicator valve is in the open state, and the gas in the cylinder 60 enters the explosion pressure detection device through the indicator valve. Determine whether the measurement results of the burst pressure detection device are correct.

[0053] Understandably, during engine operation, it is necessary to measure the combustion pressure of each cylinder 60. The combustion pressure measuring device is connected to the uninstalled indicator valve, specifically to the end of the indicator valve interface assembly 30 furthest from the housing 10. The control assembly 80 sends a command to the air passage assembly 70, which supplies compressed gas to the indicator valve's inlet 11. The compressed gas pushes the valve core 20 upwards, separating the originally sealed valve core 20 from the stepped surface 131. Then, the airflow passage 13 and exhaust passage 31 within the indicator valve are pre-blown, and the indicator valve is closed after pre-blowing. The indicator valve is then installed on the cylinder 60, and compressed gas is supplied to its inlet 11, opening the indicator valve. The cylinder 60 then operates, allowing the combustion gases in the cylinder 60 to enter the combustion pressure measuring device through the indicator valve. The measurement is then checked by the combustion pressure measuring device. If correct, the measurement is complete, and the indicator valve is closed. If incorrect, the engine is restarted, and the measurement is repeated.

[0054] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0055] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0056] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0057] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. A power indicator valve, characterized in that, include: The housing (10) has an air inlet (11), an air outlet (12) and an airflow channel (13), the inner wall of which is formed with a stepped surface (131). The valve core (20) is slidably disposed in the housing (10) and surrounds the housing (10) to form a receiving cavity (21). The receiving cavity (21) is connected to the air inlet (11) and the airflow channel (13) respectively. A portion of the valve core (20) is embedded in the airflow channel (13). The valve core (20) has a closed state and an open state: in the closed state, the valve core (20) is configured to be sealed to the stepped surface (131) to isolate the air outlet (12) and the airflow passage (13); in the open state, the valve core (20) is configured to be pushed by the gas delivered to the receiving cavity (21) by the air inlet (11) to connect the air outlet (12) and the airflow passage (13).

2. The indicator valve according to claim 1, characterized in that, The airflow channel (13) includes a first air chamber (132), a second air chamber (133), and a transition chamber (134) that are connected to each other. The first air chamber (132) is connected to the air outlet (12). The inner diameter of the first air chamber (132) is larger than the inner diameter of the second air chamber (133). The first air chamber (132) is connected to the second air chamber (133) through the transition chamber (134). The inner wall surface of the transition chamber (134) is the stepped surface (131).

3. The indicator valve according to claim 2, characterized in that, Along the direction from the receiving cavity (21) to the airflow channel (13), the inner diameter of the transition cavity (134) gradually decreases, and the bottom end of the valve core (20) has a blocking part (22). Along the direction from the receiving cavity (21) to the airflow channel (13), the outer diameter of the blocking part (22) gradually decreases. In the closed state, the blocking part (22) is embedded in the transition cavity (134) and is sealed to the stepped surface (131).

4. The indicator valve according to claim 1, characterized in that, The indicator valve also includes an interface component (30), one end of which is embedded in the air outlet (12) and detachably connected to the housing (10). The interface component (30) is used to connect the housing (10) to the pipe assembly.

5. The indicator valve according to claim 4, characterized in that, The interface assembly (30) has an exhaust channel (31) and a mounting cavity (32) communicating with the exhaust channel (31). The indicator valve also includes a detection component (40), which is disposed in the mounting cavity (32) and is used to detect the gas passing through the exhaust channel (31).

6. The indicator valve according to claim 5, characterized in that, The detection component (40) integrates one or more of the following: a pressure sensor, a humidity sensor, a combustible gas sensor, and a liquid detection sensor.

7. The indicator valve according to claim 1, characterized in that, The indicator valve also includes an elastic part (50), which abuts against the top of the valve core (20) in the closed state, so that the valve core (20) abuts against the stepped surface (131).

8. An engine blowing system, characterized in that, include: engine; A plurality of indicator valves as described in any one of claims 1 to 7, each of the indicator valves being connected to a cylinder (60) on the engine; The gas path assembly (70) is connected to the air inlet (11) of the plurality of indicator valves respectively, and is used to deliver gas to the air inlet (11); A control component (80) is disposed on the engine and electrically connected to the engine, and the control component (80) is electrically connected to a detection component (40) on each of the indicator valves; The engine has a blow-up state, in which the air passage assembly (70) is configured to deliver gas to the air inlet (11) so that the valve core (20) of the indicator valve is in the open state, and the gas in the cylinder (60) can be discharged through the airflow passage (13) and the air outlet (12) of the indicator valve.

9. The engine blowing system according to claim 8, characterized in that, The gas path assembly (70) includes: The valve body (71) is electrically connected to the control assembly (80), and the valve body (71) is connected to the air inlet (11) of each of the indicator valves. The pipeline section (72) is connected to the valve body section (71) and is used to supply gas to the valve body section (71).

10. The engine blowing system according to claim 9, characterized in that, The valve body (71) includes: Multiple valve bodies (711) are electrically connected to the control assembly (80), the inlet side of each valve body (711) is connected to the pipeline section (72), and the outlet side of each valve body (711) is connected to the air inlet (11) of one of the indicator valves.

11. A control method for an engine blowing system, characterized in that, The control method, applied to an engine blowing system as described in any one of claims 8 to 10, comprises: The control component (80) determines whether the engine needs to enter the blowing state based on the blowing requirements; When the engine blowing system meets the blowing requirements, the control component (80) determines whether the blowing conditions are met. When the engine blowing system meets the blowing conditions, the control component (80) controls the air circuit component (70) of the engine blowing system to deliver gas to the air inlet (11) of the indicator valve so that the valve core (20) of the indicator valve is in the open state. The control component (80) controls the engine to enter the blowing state, and the detection component (40) on the indicator valve detects the substance blown out of the cylinder (60) of the engine.

12. The control method for the engine blowing system according to claim 11, characterized in that, The control method further includes a detection and judgment step, which includes: When the detection component (40) detects the substance blown out by the engine, if liquid or combustible gas is detected, the control component (80) issues an alarm and displays the corresponding cylinder (60) of the engine. If no liquid or combustible gas is detected, the control component (80) controls the gas circuit component (70) to close, and the blowing state ends.

13. The control method for the engine blowing system according to claim 11, characterized in that, The engine blowing requirements include the engine's shutdown time exceeding the limit, the detection result of the detection component (40) being abnormal when the engine is in a shutdown state, and the need for manual engine blowing.

14. The control method for the engine blowing system according to claim 11, characterized in that, The conditions for blowing the engine include starting air pressure, pre-supply lubricating oil pressure, starting motor speed, and turning mechanism engagement.

15. The control method for the engine blowing system according to claim 11, characterized in that, The control method further includes a burst pressure detection step, which includes: Connect the burst pressure measuring device to the indicator valve; The control component (80) controls the gas circuit component (70) to deliver gas to the inlet (11) of the indicator valve so that the valve core (20) of the indicator valve is in the open state, and the gas in the cylinder (60) enters the explosion pressure measuring device through the indicator valve. Determine whether the measurement result of the explosion pressure measuring device is correct.

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