Pneumatic control type super-protection redundancy control system for diesel engine

Abstract

According to the air control type super-protection redundancy control system for the diesel engine, a double-electromagnetic-valve air control device comprises a first two-position three-way electromagnetic valve and a second two-position three-way electromagnetic valve, the first two-position three-way electromagnetic valve and the second two-position three-way electromagnetic valve are connected in series, and the output end of the second two-position three-way electromagnetic valve is connected with a plurality of air cut-off valves which are connected in parallel; the first two-position three-way electromagnetic valve and the second two-position three-way electromagnetic valve are both communicated with an air source through an air supply pipe, and on-off control over the multiple air cut-off valves is achieved under the condition that the first two-position three-way electromagnetic valve or the second two-position three-way electromagnetic valve fails. The problem that reliable control of the air cut-off valve is affected due to the fact that a traditional oil control structure is greatly affected by environmental conditions is effectively solved, emergency stop can be achieved under the condition that any two-position three-way electromagnetic valve fails, the effect of protecting a diesel engine is achieved, parts of an over-protection control system are reduced, the structure is simpler, the design is novel, and cost is lower. Compressed air which is used as a medium is more stable and reliable than lubricating oil or other media.

Description

Technical Field

[0001] The utility model belongs to the technical field of diesel engines, and in particular relates to a gas-controlled super-safety redundant control system for diesel engines. Background Art

[0002] With the continuous development of the diesel engine industry, the safe and reliable operation of diesel engines has received increasing attention. Currently, the existing overspeed protection system uses a single solenoid valve air pressure control or a dual solenoid valve oil pressure control to close the air shut-off valve. These two control methods have the following problems during normal use: ① The overspeed protection system controlled by a single solenoid valve has no redundant design. When the solenoid valve fails, overspeed shutdown cannot be achieved; ② The overspeed protection system controlled by oil pressure is greatly affected by the pipe diameter, lubricating oil viscosity, temperature, pressure, etc. When the oil temperature is low, the lubricating oil cannot flow quickly enough to meet the requirements of emergency shutdown of the diesel engine. Therefore, it is necessary to improve the above problems. Utility Model Content

[0003] The technical problem solved by the utility model is to provide an air-controlled super-safety redundant control system for a diesel engine, which adopts a double solenoid valve connected to the air source through a Y-shaped air supply pipe to pneumatically control multiple air shut-off valves, effectively avoiding the problem that the traditional oil control structure is greatly affected by environmental conditions and affects the reliable control of the air shut-off valves. In the event of failure of any two-position three-way solenoid valve, the engine can be shut down in an emergency to protect the diesel engine. The super-safety control system has fewer components, a simpler structure, and a novel design. The medium used is compressed air, which is more stable and reliable than lubricating oil or other media.

[0004] The technical solution adopted by the utility model is as follows: an air-controlled super-safety redundant control system for a diesel engine, comprising a plurality of air shut-off valves and a dual-solenoid valve air control device, wherein the dual-solenoid valve air control device comprises a two-position three-way solenoid valve 1 and a two-position three-way solenoid valve 2, the two-position three-way solenoid valve 1 and the two-position three-way solenoid valve 2 being connected in series, and the output end of the two-position three-way solenoid valve 2 being connected in series with a plurality of air shut-off valves connected in parallel with each other, the two-position three-way solenoid valve 1 and the two-position three-way solenoid valve 2 being both connected to an air source through an air supply pipe, and realizing on-off control of the plurality of air shut-off valves in the event of failure of the two-position three-way solenoid valve 1 or the two-position three-way solenoid valve 2.

[0005] Wherein, the air supply pipe is a Y-shaped pipe formed by a main air pipe and two branch pipes connected to the main air pipe.

[0006] Furthermore, the pipe openings of the two branch pipes - are respectively connected to the A ports of the two-position three-way solenoid valve 1 and the two-position three-way solenoid valve 2, and the gas main pipe - is connected to the gas source.

[0007] Furthermore, the P port of the two-position three-way solenoid valve 1 is connected in series with the B port of the two-position three-way solenoid valve 2, and the P port of the two-position three-way solenoid valve 2 is connected to multiple air shut-off valves.

[0008] The advantages of this utility model compared with the prior art are:

[0009] 1. This technical solution uses dual solenoid valves connected to the air source through a Y-shaped air supply pipe to pneumatically control multiple air shut-off valves, effectively avoiding the problem that traditional oil control structures are greatly affected by environmental conditions and affect the reliable control of air shut-off valves;

[0010] 2. The two-position three-way solenoid valve 1 and the two-position three-way solenoid valve 2 connected in series in this technical solution can ensure that the engine can be shut down in an emergency if any of the two-position three-way solenoid valves fails, thereby protecting the diesel engine.

[0011] 3. The super-safety control system of this technical solution has fewer components, a simpler structure, and a novel design. It uses compressed air as a medium, which is more stable and reliable than lubricating oil or other media. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the overspeed parking redundant system of the utility model. DETAILED DESCRIPTION

[0013] The following is a combination of the embodiments of the present invention Figure 1 The technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort shall fall within the scope of protection of the present invention.

[0014] It should be noted that, in this document, unless otherwise stated, it should be understood that the terms "center," "upper," "lower," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate positions or relationships based on those shown in the accompanying drawings. These are intended only to facilitate the description of the present invention and simplify the description, and are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0015] As used herein, the terms "comprises," "comprising," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, the phrase "comprising a..." does not preclude the presence of additional identical elements in the process, method, article, or apparatus that includes the elements.

[0016] Air-controlled super redundant control system for diesel engines, such as Figure 1 As shown, it includes multiple air shut-off valves 3 and a double-solenoid valve air control device, the double-solenoid valve air control device includes a two-position three-way solenoid valve 1 and a two-position three-way solenoid valve 2, the two-position three-way solenoid valve 1 and the two-position three-way solenoid valve 2 are connected in series, and the output end of the two-position three-way solenoid valve 2 is connected in series with multiple air shut-off valves 3 connected in parallel, the two-position three-way solenoid valve 1 and the two-position three-way solenoid valve 2 are both connected to the air source through the air supply pipe 4, and realize on-off control of multiple air shut-off valves 3 in the event of failure of the two-position three-way solenoid valve 1 or the two-position three-way solenoid valve 2; in the above structure, the double-solenoid valve connected to the air source through the Y-shaped air supply pipe 4 is used to pneumatically control multiple air shut-off valves, effectively avoiding the problem that the traditional oil control structure is greatly affected by environmental conditions and affects the reliable control of the air shut-off valve; the two-position three-way solenoid valve 1 and the two-position three-way solenoid valve 2 are connected in series, which can ensure that the engine can be shut down in an emergency in the event of failure of any two-position three-way solenoid valve, thereby protecting the diesel engine;

[0017] The air supply pipe 4 is a Y-shaped pipe formed by a main air pipe 4-1 and two branch pipes 4-2 connected to the main air pipe 4-1; specifically, the pipe openings of the two branch pipes 4-2 are respectively connected to the A ports of the two-position three-way solenoid valve 1 and the two-position three-way solenoid valve 2, and the main air pipe 4-1 is connected to the air source; specifically, the P port of the two-position three-way solenoid valve 1 is connected in series with the B port of the two-position three-way solenoid valve 2, and the P port of the two-position three-way solenoid valve 2 is connected to multiple air shut-off valves 3.

[0018] like Figure 1 As shown, when the two-position three-way solenoid valve 1 and the two-position three-way solenoid valve 2 are both energized and working normally, the A port and the P port of the two-position three-way solenoid valve 1 and the two-position three-way solenoid valve 2 are connected, and the control air is divided into two paths through the air supply pipe 4. One path passes through the A port and the P port of the two-position three-way solenoid valve 1 to the B port of the two-position three-way solenoid valve 2. Since the B port and the P port of the two-position three-way solenoid valve 2 are in a disconnected state, the control air on this path stops here; the other path passes through the A port and the P port of the two-position three-way solenoid valve 2 to the multiple air shut-off valves 3, thereby realizing the control of the air shut-off valves 3;

[0019] When the 2-position 3-way solenoid valve 1 fails, its port A and port P are disconnected, while the port A and port P of the 2-position 3-way solenoid valve 2 are connected. Therefore, the gas in the branch pipe 4-2 connected to the port A of the 2-position 3-way solenoid valve 1 cannot enter the 2-position 3-way solenoid valve 1; while the gas in the other branch pipe 4-2 passes through the ports A and P of the 2-position 3-way solenoid valve 2 to the multiple air shut-off valves 3, thereby controlling the air shut-off valves 3.

[0020] When the two-position three-way solenoid valve 2 fails, the A port and the P port of the two-position three-way solenoid valve 1 are connected, while the A port and the P port of the two-position three-way solenoid valve 2 are disconnected, and the B port and the P port of the two-position three-way solenoid valve 2 are connected. Therefore, the compressed air can pass through the A port and the P port of the two-position three-way solenoid valve 1 and the B port and the P port of the two-position three-way solenoid valve 2 to the multiple air cut-off valves 3, thereby realizing the control of the air cut-off valves 3.

[0021] The super-safety control system of this technical solution has fewer components, a simpler structure, and a novel design. It uses compressed air as a medium, which is more stable and reliable than lubricating oil or other media.

[0022] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0023] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. The gas-controlled super redundant control system for diesel engines is characterized by: The invention comprises a plurality of air shut-off valves (3) and a double-solenoid valve air control device, wherein the double-solenoid valve air control device comprises a two-position three-way solenoid valve (1) and a two-position three-way solenoid valve (2), wherein the two-position three-way solenoid valve (1) and the two-position three-way solenoid valve (2) are connected in series, and the output end of the two-position three-way solenoid valve (2) is connected in series with a plurality of air shut-off valves (3) connected in parallel with each other, wherein the two-position three-way solenoid valve (1) and the two-position three-way solenoid valve (2) are both connected to an air source through an air supply pipe (4), and realize on-off control of the plurality of air shut-off valves (3) when the two-position three-way solenoid valve (1) or the two-position three-way solenoid valve (2) fails.

2. The gas-controlled super redundant control system for a diesel engine according to claim 1, characterized in that: The air supply pipe (4) is a Y-shaped pipe formed by a main air pipe (4-1) and two branch pipes (4-2) communicating with the main air pipe (4-1).

3. The gas-controlled super redundant control system for a diesel engine according to claim 2, characterized in that: The pipe openings of the two branch pipes (4-2) are respectively connected to the A ports of the two-position three-way solenoid valve 1 (1) and the two-position three-way solenoid valve 2 (2), and the main gas pipe (4-1) is connected to the gas source.

4. The gas-controlled super redundant control system for a diesel engine according to claim 1, 2 or 3, characterized in that: The P port of the two-position three-way solenoid valve 1 (1) is connected in series with the B port of the two-position three-way solenoid valve 2 (2), and the P port of the two-position three-way solenoid valve 2 (2) is connected to multiple air cut-off valves (3).

Images