Pneumatic control system of diesel engine

Abstract

The utility model discloses a diesel engine pneumatic control system, which belongs to the technical field of diesel engine corollary equipment, and adopts the technical scheme that the diesel engine pneumatic control system comprises a pneumatic control cabinet, a gas supply device and a PLC (Programmable Logic Controller), the gas supply device is arranged inside the pneumatic control cabinet, the pneumatic control cabinet comprises a cabinet body and a starting switch, the starting switch is arranged outside the cabinet body, and the gas supply device comprises an electromagnetic valve and a starting valve; the electromagnetic valve is connected with the starting valve through a pipeline, the starting switch is electrically communicated with the electromagnetic valve, and the electromagnetic valve is electrically communicated with the PLC. The pneumatic system has the beneficial effects that the pneumatic system which is more compact and light in structure and convenient to mount and dismount is designed, the air supply device is automatically controlled to output compressed air, and the cleanliness and the safety of the system are improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to diesel engine supporting equipment technical field, specifically related to a diesel engine pneumatic control system. BACKGROUND

[0002] With the rapid development of science and technology, diesel engine technology has been increasingly mature and perfect, and is widely used in various fields, such as ships, locomotives, generator sets and heavy machinery. However, although the supporting pneumatic control system has made significant progress in technology, it still faces a series of challenges, of which the most prominent is the difficulty in meeting the key requirements of simple structure, easy installation and removal, high cleanliness and strong safety at the same time.

[0003] Specifically, the traditional pneumatic control system often has a complex structure, including a large number of pipelines, valves and connecting parts, which not only increases the difficulty of installation and removal of the system, but also increases the maintenance cost. At the same time, the complex structure also easily leads to cleanliness problems, dust and impurities easily accumulate inside the system, affecting the stability and reliability of the system. In addition, the traditional pneumatic control system also has certain hidden dangers in safety, such as pressure out of control, leakage and other potential risks.

[0004] Chinese patent application with publication number CN106304722A proposes an electrical control cabinet, which aims to use the air supply and exhaust mechanism to cool and dehumidify the internal electronic components, while preventing the entry of external dust. Although this method also has an air supply device, it is used to cooperate with the exhaust structure to drive the circulation of external air and internal air of the electrical control cabinet, thereby performing heat exchange, discharging the large amount of heat generated by the electrical components inside the cabinet during operation, and does not have the effect of purifying the gas. UTILITY MODEL CONTENTS

[0005] In order to solve the above technical problems, the utility model provides a diesel engine pneumatic control system. The utility model designs a compact and lightweight pneumatic system with convenient installation and removal, which has the ability to automatically control the air supply device to output compressed air, while effectively improving the cleanliness and safety performance of the system.

[0006] The technical solution adopted by the utility model to solve its technical problems is:

[0007] A diesel engine pneumatic control system, comprising a pneumatic control cabinet, an air supply device and a PLC, the air supply device being arranged inside the pneumatic control cabinet, the pneumatic control cabinet comprising a cabinet body and a start switch, the start switch being arranged outside the cabinet body, the air supply device comprising a solenoid valve and a start valve, the solenoid valve and the start valve being connected by a pipeline, the start switch being in electrical communication with the solenoid valve, the solenoid valve being in electrical communication with the PLC.

[0008] Further, the pneumatic control cabinet further comprises fixing bolts, lifting ring bolts, a cabinet door and a handle, the fixing bolts are arranged below the cabinet body, the lifting ring bolts are arranged above the cabinet body, the cabinet door is arranged on the cabinet body, and the handle is arranged on the cabinet door.

[0009] Further, the gas supply device further comprises an inlet connecting flange, a transition connecting block, a gas pipe fixing clamp, an outlet filter, a pressure reducing valve and a safety valve, and the inlet connecting flange, the transition connecting block, the gas pipe fixing clamp, the outlet filter, the pressure reducing valve and the safety valve are sequentially arranged on a pipeline.

[0010] Further, the outlet filter is internally provided with a filter screen.

[0011] Further, the transition connecting block is a two-docking screw flange structure for connecting two pipelines.

[0012] Further, the safety valve is arranged at the upper end of the four-way joint, the four-way joint is respectively connected with the starting valve and the pressure reducing valve at the front end and the rear end, and the lower end of the four-way joint is blocked by a screw plug.

[0013] Further, the cabinet body is made of nodular cast iron material.

[0014] The utility model has the advantages that:

[0015] (1) The diesel engine is automatically controlled to supply gas; the opening and closing of the internal passage of the electromagnetic valve are controlled by the electric signal sent by the PLC, the pneumatic pressure flowing to the starting valve can be regulated and controlled, the output or cut-off of the gas source of the starting valve can be accurately controlled, and the automatic management and control of the pneumatic control system of the diesel engine are realized.

[0016] (2) The structure is compact and convenient to operate; the reasonable layout and component design make the whole pneumatic control system compact in structure and convenient to install and maintain; the starting switch is located outside the pneumatic control cabinet, and the operator can quickly start and stop the system.

[0017] (3) The cleanliness of the system is improved; the outlet filter is provided, dust and impurities in the compressed air can be effectively filtered, and the environmental protection and cleanliness of the gas supply are ensured.

[0018] (4) The safety of the system is improved; the cabinet body of the pneumatic control cabinet is made of nodular cast iron material, the high strength, rigidity and good corrosion resistance of the material enable the nodular cast iron cabinet body to withstand greater external force and effectively prolong the service life, and ensure that the internal gas supply device of the pneumatic control cabinet can stably operate in a harsh environment; the safety valve is provided in the internal gas supply device, the safety valve can provide additional safety protection for the system, and when the pipeline pressure abnormally rises or other faults occur in the system, the safety valve can quickly respond and open to release the excess pressure and prevent the system from being damaged or accidents from occurring. BRIEF DESCRIPTION OF DRAWINGS

[0019] Fig. 1 It is the structure schematic view of the gas control cabinet of the utility model.

[0020] Fig. 2 It is the structure schematic view of the gas control system of the utility model.

[0021] In the drawing, 101 is a fixed bolt, 102 is a cabinet door, 103 is a cabinet body, 104 is a handle, 105 is a starting switch, 106 is a lifting ring bolt, 201 is an inlet connecting flange, 202 is a transition connecting block, 203 is a gas pipe fixing clamp, 204 is a pressure reducing valve, 205 is a safety valve, 206 is an outlet filter, 207 is a starting valve, and 208 is an electromagnetic valve. DETAILED DESCRIPTION

[0022] In order to more clearly set forth the purpose, technical scheme and advantages of the present disclosure, the embodiments of the present disclosure will be described in detail below with reference to the drawings. It should be understood that the following description of the embodiments is intended to explain and illustrate the general concept of the present disclosure, and should not be understood as a limitation of the present disclosure. In the specification and drawings, the same or similar reference numerals refer to the same or similar parts or components. For the sake of clarity, the drawings are not necessarily drawn to scale, and some well-known parts and structures can be omitted in the drawings.

[0023] In the description of the present disclosure, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present disclosure. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0024] In the description of the present disclosure, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present utility model can be understood according to the specific circumstances.

[0025] In addition, the technical features involved in the different embodiments of the present utility model described below can be combined with each other as long as there is no conflict between them.

[0026] The utility model will be further explained in detail below in combination with the drawings and examples.

[0027] Example 1

[0028] As Figs. 1-2 Indicated, the working process of the diesel engine gas control system is as follows:

[0029] A diesel engine gas control system, including external gas control cabinet and internal gas supply device, gas control cabinet outside configuration start switch 105, the electromagnetic valve 208 of internal gas supply device can be based on the control of start switch 105 or the instruction issued by PLC adjusts its internal passage's open-close state, accurately control whether the pneumatic pressure acts on starting valve 207, to make starting valve 207 accurately and correctly complete the opening or closing action.

[0030] The external compressed gas source is first introduced into the internal gas supply device through the inlet connecting flange 201. In this process, the compressed air is first introduced into the outlet filter 206, which is provided with a filter screen inside, which can effectively filter out dust, oil mist, moisture and other impurities in the compressed air, ensuring that the compressed air supplied to the subsequent equipment is pure and high quality.

[0031] After preliminary filtration, the clean compressed air enters the pressure reducing valve 204. The main function of the pressure reducing valve 204 is to adjust the pressure of the compressed air to the appropriate level required by the equipment, to avoid excessive pressure causing damage to other equipment.

[0032] Finally, the compressed air after pressure reduction is further ensured to fluctuate within a safe range under the strict monitoring of the safety valve 205. As the last line of defense of the system, the safety valve 205 can respond quickly when the pressure abnormally rises, releasing excess pressure to protect the entire pneumatic system from damage.

[0033] After the above treatment, the compressed air converges at the starting valve 207, which can supply air to the diesel engine after being opened.

[0034] Example 2

[0035] The other parts of this example are consistent with example 1, and the specific parameters of the gas supply device pipeline connection relationship and part of the structure of the utility model are described in detail:

[0036] The gas supply device is composed of an inlet connecting flange 201, a transition connecting block 202, a gas pipe fixing clamp 203, a pressure reducing valve 204, a safety valve 205, an outlet filter 206, a starting valve 207, an electromagnetic valve 208, etc. The external compressed gas source enters the gas supply device through the inlet connecting flange 201, flows through the outlet filter 206, the pressure reducing valve 204, the safety valve 205 in sequence through the pipeline, and is discharged at the starting valve 207.

[0037] The start switch 105 is externally provided with a protective cover to prevent the system from being suddenly started or stopped due to accidental touch of the switch.

[0038] The transition connecting block 202 is a structure of two mating wire connection flanges, which is used to connect the front and rear pipelines to adjust the orientation of the gas inlet of the inlet connecting flange 201.

[0039] The outlet filter 206 is internally provided with a 20-mesh filter screen, which can filter the compressed air flowing from the inlet connecting flange 201, and the filtering accuracy is controlled within 5 μm.

[0040] The pressure reducing valve 204 can adjust the gas pressure entering the system from 3 MPa to 0.7 MPa.

[0041] The safety valve 205 is installed on the upper end of the four-way joint, the front and rear ends of the four-way joint are connected with the start valve 207 and the pressure reducing valve 204, and the lower end is blocked by a grommet, the safety valve 205 is used to release excess pressure to ensure that the system pressure fluctuates within a safe range.

[0042] The air pipe fixing clamp 203 is located between the outlet filter 206 and the transition connecting block 202, and is used to fix the pipeline through which the compressed air flows.

[0043] The cabinet body 103 is made of nodular cast iron material.

[0044] The fixing bolt 101 is arranged below the cabinet body 103, and is used to fix the pneumatic control cabinet cabinet body 103.

[0045] The lifting ring bolt 106 is arranged above the cabinet body 103, and is used to lift and carry the pneumatic control cabinet cabinet body 103.

[0046] The cabinet door 102 is arranged on the cabinet body 103, and can be opened from the center to both sides with the cabinet body 103 as the shaft. The handle 104 is arranged on the cabinet door 102 and located on both sides of the center line of the cabinet body 103.

[0047]

Embodiment 3

[0048] The other parts of this embodiment are consistent with Embodiment 1, and the cabinet body 103 and the pipeline assembly of the utility model are changed as follows:

[0049] A perspective window is arranged on the pneumatic control cabinet cabinet body 103, which is used to observe the working state of the pneumatic system. The operator can directly observe the internal components and running state of the pneumatic system through the perspective window, such as the extension and retraction of the air cylinder, the opening and closing of the air valve, and the pressure change of the pipeline. The observation through the perspective window is intuitive, which helps to discover and diagnose potential faults in time, thereby shortening the troubleshooting time and improving the reliability and stability of the equipment.

[0050] A filter is arranged between the safety valve 205 and the starting valve 207, which can further capture and remove the residual small impurities in the gas, such as dust, oil mist and small particulate matters, ensure that the gas supplied to the starting valve 207 is more pure, reduce the wear and corrosion of the internal components of the starting valve 207, and prolong the service life thereof.

[0051] The above-mentioned embodiments are only preferred embodiments of the present application, and not all the embodiments that can be implemented by the present application. Any obvious modifications made by those skilled in the art without departing from the principles and spirits of the present application should be considered to be included in the protection scope of the claims of the present application.

Claims

1. A diesel engine pneumatic control system, characterized by, The air control cabinet, the air supply device and the PLC are included, the air supply device is arranged inside the air control cabinet, the air control cabinet includes a cabinet body (103) and a starting switch (105), the starting switch (105) is arranged outside the cabinet body (103), the air supply device includes an electromagnetic valve (208) and a starting valve (207), the electromagnetic valve (208) and the starting valve (207) are connected through a pipeline, the starting switch (105) and the electromagnetic valve (208) are in electrical communication, the electromagnetic valve (208) and the PLC are in electrical communication, the air supply device further includes an inlet connecting flange (201), a transition connecting block (202), an air pipe fixing clamp (203), an outlet filter (206), a pressure reducing valve (204) and a safety valve (205), and the inlet connecting flange (201), the transition connecting block (202), the air pipe fixing clamp (203), the outlet filter (206), the pressure reducing valve (204), the safety valve (205) and the starting valve (207) are sequentially arranged on the pipeline.

2. The diesel air management system of claim 1, wherein, The air control cabinet further includes fixing bolts (101), lifting ring bolts (106), a cabinet door (102) and a handle (104), the fixing bolts (101) are arranged below the cabinet body (103), the lifting ring bolts (106) are arranged above the cabinet body (103), the cabinet door (102) is arranged on the cabinet body (103), and the handle (104) is arranged on the cabinet door (102).

3. The diesel air management system of claim 1, wherein, The outlet filter (206) is internally provided with a filter screen.

4. The diesel air management system of claim 1, wherein, The transition connecting block (202) is a two-connection pipe thread flange structure for connecting two pipelines.

5. The diesel air management system of claim 1, wherein, The safety valve (205) is arranged on the upper end of a four-way joint, the front and rear ends of the four-way joint are respectively connected with the starting valve (207) and the pressure reducing valve (204), and the lower end of the four-way joint is connected with a pipe plug for sealing.

6. The diesel air management system of claim 1, wherein, The cabinet body (103) is made of nodular cast iron material.

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