A kind of methanol injector carbon deposition monitoring device based on acoustic wave detection

Abstract

The utility model relates to a double fuel engine technical field provides a kind of methanol injector carbon deposit monitoring device based on acoustic wave detection, including several acoustic wave probes arranged in the outside of engine cylinder by fixed component, the fixed component includes the first clamping piece and air pressure cylinder on the engine body, the carbon deposit monitoring device further includes the pressure control cylinder vertically arranged, first piston seal is equipped in the pressure control cylinder, and counterweight is equipped on first piston seal, second piston seal is equipped in the air pressure cylinder, second clamping piece is equipped on the second piston seal, and common pressure pipe is equipped and is communicated between the pressure control cylinder and air pressure cylinder;The clamping force of acoustic wave probe is always consistent and continuously maintained, no matter how engine cylinder vibrates, the clamping force of acoustic wave probe by first clamping piece and second clamping piece always maintains set degree, avoid acoustic wave probe to appear loose deviation situation, and dismounting is convenient, improve the overhaul maintenance efficiency of acoustic wave probe.

Description

Technical Field

[0001] This utility model relates to the field of dual-fuel engine technology, specifically a methanol injector carbon deposit monitoring device based on acoustic wave detection. Background Technology

[0002] As marine power systems transition towards low-carbon technologies, marine methanol dual-fuel engines are gradually gaining widespread application due to their excellent environmental characteristics and fuel adaptability. However, during methanol fuel injection, the injector head is prone to carbon buildup due to high-temperature oxidation and fuel residue accumulation, leading to deterioration of the spray pattern, increased injection volume deviation, and in severe cases, even engine power reduction, excessive emissions, and operational reliability issues. Therefore, real-time and accurate monitoring of the carbon buildup status of methanol injectors is of great significance for ensuring the efficient and stable operation of engines.

[0003] In recent years, acoustic wave detection technology has been gradually introduced into combustion system condition monitoring. This technology is based on the changes in the propagation characteristics of sound waves in a medium. By analyzing the echo signals, it identifies the formation and thickness distribution of carbon deposits. Specifically, several acoustic wave probes (such as piezoelectric ultrasonic probes) are usually arranged outside the engine cylinder, close to the methanol injector. The ultrasonic probes emit sound waves of a specific frequency and receive their echoes. The echo signals are processed and analyzed by a corresponding processing and analysis system to invert the carbon deposit adhesion on the injector orifice or inner cavity surface. Currently, most acoustic wave probes are installed outside the cylinder by bolt fastening. The periodic combustion bursts and piston assembly movements inside the cylinder cause strong mechanical vibrations in the cylinder. The vibration effect can cause the bolts to loosen, resulting in a displacement of the acoustic wave probe position and a change in the detection angle, which directly affects the accuracy of the acoustic wave signal emission / acquisition. In addition, to ensure the long-term reliability of the monitoring system, the acoustic wave probes need to be removed for inspection and maintenance (such as calibration and cleaning) periodically. The bolt installation method makes the disassembly and assembly of the acoustic wave probes very inconvenient, affecting the efficiency of inspection and maintenance.

[0004] Therefore, this invention proposes a methanol injector carbon deposit monitoring device based on acoustic wave detection to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a methanol injector carbon deposit monitoring device based on acoustic wave detection to solve the above-mentioned problems.

[0006] To achieve the above objectives, this utility model provides the following technical solution: A methanol injector carbon deposit monitoring device based on acoustic wave detection includes several acoustic wave probes arranged outside the engine cylinder via a fixed assembly. The fixed assembly includes a first clamping member and a pneumatic cylinder mounted on the engine block. The carbon deposit monitoring device also includes a vertically arranged pressure control cylinder. The pressure control cylinder is provided with a first piston seal and a counterweight on the first piston seal. The pneumatic cylinder is provided with a second piston seal and a second clamping member directly opposite the first clamping member on the second piston seal. A common pressure pipe is provided between the pressure control cylinder and the pneumatic cylinder. The mounting assembly also includes a pushing component for moving the second clamp away from the first clamp to release the acoustic probe.

[0007] In one alternative: the pushing component includes an abutment rod hinged to the first clamping member, one end of the abutment rod being used to abut against the second clamping member, and the carbon deposit monitoring device further includes an operating rod for connection to the abutment rod to use leverage to drive the abutment rod to deflect, thereby pushing the second clamping member to move away from the first clamping member.

[0008] In one alternative: the operating lever includes a lever body and a plug portion located at one end of the lever body, and the abutment lever is provided with a slot for insertion of the plug portion.

[0009] In one alternative: the end of the abutment rod that abuts against the second clamping member is provided with a roller.

[0010] In one alternative: the pneumatic cylinder is provided with several limiting bosses to prevent the second piston seal from slipping.

[0011] In one alternative: the first clamping member and the second clamping member are provided with limiting grooves on opposite sides that are adapted to the contour of the acoustic probe, and the walls of the limiting grooves are provided with protective pads.

[0012] In one alternative: the carbon deposit monitoring device further includes an adaptive component for keeping the pressure control cylinder vertical, the adaptive component including a frame, a first frame disposed on the frame, a second frame rotatably disposed on the first frame, and a support member rotatably disposed on the second frame, the pressure control cylinder being disposed on the support member, and the rotation plane of the second frame being perpendicular to the rotation plane of the support member.

[0013] In one alternative: a rotation damper is provided at the rotatable connection between the second frame and the first frame, and at the rotatable connection between the bearing member and the second frame.

[0014] Compared with the prior art, the beneficial effects of this utility model embodiment are as follows: 1. The counterweight drives the first piston seal downward to inject air into the air cylinder, which in turn drives the second piston seal to move towards the opening of the air cylinder. This causes the second clamping member to move towards the first clamping member, thus clamping and fixing the acoustic probe. The weight on the counterweight is constant. In the vertical state of the pressure control cylinder, the downward pressure of the counterweight on the first piston seal is constant, ensuring that the balance pressure between the pressure control cylinder and the air cylinder is always consistent. This means that the clamping force on the acoustic probe is always consistent and maintained. No matter how the engine cylinder vibrates, the clamping force of the first and second clamping members on the acoustic probe always maintains the set force, preventing the acoustic probe from becoming loose or shifting. This ensures the accuracy of acoustic signal transmission / collection, and thus ensures the accuracy of monitoring carbon deposits on the methanol injector. 2. The second clamping member is moved away from the first clamping member by the pushing component, thus releasing the acoustic probe. During installation, the second clamping member is first moved a certain distance away from the first clamping member by the pushing component so that the distance between the first and second clamping members is greater than the size of the acoustic probe. Then, the acoustic probe is placed between the first and second clamping members. After that, the pushing component is released, and the second clamping member automatically moves towards the first clamping member under air pressure to clamp. This makes disassembly and assembly convenient and greatly improves the efficiency of inspection and maintenance of the acoustic probe.

[0015] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0016] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. Furthermore, these drawings and textual descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concepts of this application to those skilled in the art through reference to specific embodiments.

[0017] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model.

[0018] Figure 2 This is a schematic diagram showing the arrangement of the pressure control cylinder, the first piston seal, and the counterweight in an embodiment of this utility model.

[0019] Figure 3 for Figure 1 Enlarged view of point A in the middle.

[0020] Figure 4 This is a three-dimensional schematic diagram of the second clamping member in an embodiment of this utility model.

[0021] Figure 5 This is a schematic diagram showing the arrangement between the adaptive component and the pressure control cylinder in an embodiment of this utility model.

[0022] Figure reference numerals: 1-Engine cylinder part, 2-Fixed assembly, 201-First clamping component, 202-Pneumatic cylinder, 203-Second piston seal, 204-Second clamping component, 205-Limiting boss, 206-Abutting rod, 207-Roller, 208-Limiting groove, 209-Protective pad, 3-Pressure control cylinder, 4-Common pressure pipe, 5-Adaptive assembly, 501-Frame, 502-First frame, 503-Second frame, 504-Bearing component, 505-Rotation damper, 6-Counterweight, 7-First piston seal, 8-Slot, 9-Rod, 10-Plug-in part, 11-Sound probe. Detailed Implementation

[0023] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0024] Please see Figures 1-4 A methanol injector carbon deposit monitoring device based on acoustic wave detection includes several acoustic wave probes arranged outside the engine cylinder via a mounting assembly 2. The fixed assembly 2 includes a first clamping member 201 and a pneumatic cylinder 202 disposed on the engine block (the first clamping member 201 and the pneumatic cylinder 202 may be fixed to the engine block by welding or may be integrally formed with the engine casing, which is not limited in this application). The carbon deposit monitoring device also includes a vertically arranged pressure control cylinder 3. The pressure control cylinder 3 is provided with a first piston seal 7 and a counterweight 6 is provided on the first piston seal 7. The pneumatic cylinder 202 is provided with a second piston seal 203 and a second clamping member 204 that is directly opposite to the first clamping member 201. A common pressure pipe 4 (the common pressure pipe 4 is a flexible hose and is a metal flexible hose) is provided between the pressure control cylinder 3 and the pneumatic cylinder 202. The mounting assembly 2 also includes a pushing component for moving the second clamp 204 away from the first clamp 201 to release the acoustic probe.

[0025] It should be noted that the carbon deposit monitoring device also includes a processing and analysis unit for processing and analyzing the echo signal of the acoustic probe to obtain carbon deposit information of the methanol injector; it also includes a central control unit, whose functions include system scheduling and timing control, human-machine interaction and communication, and data management, etc. The above are existing technologies, so they will not be described in detail here.

[0026] The acoustic probe is positioned between the first clamping member 201 and the second clamping member 204, with the sensing end of the acoustic probe in contact with the outer wall of the engine cylinder. The counterweight 6, acting under gravity, drives the first piston seal 7 downwards, injecting air into the air cylinder 202. This, in turn, drives the second piston seal 203 towards the opening of the air cylinder 202, causing the second clamping member 204 to move towards the first clamping member 201, thus clamping and fixing the acoustic probe. (In this clamped and fixed state, the air pressure in the pressure control cylinder 3 and the air pressure in the air cylinder 202 are consistent and in a balanced state, and the counterweight 6...) The first piston seal 7 is always under downward pressure. Theoretically, the weight of the counterweight 6 is constant. In the vertical position of the pressure control cylinder 3, the downward pressure of the counterweight 6 on the first piston seal 7 is constant, ensuring that the balance pressure between the pressure control cylinder 3 and the air pressure cylinder 202 is always consistent. This means that the clamping force on the acoustic probe is always consistent and maintained. Regardless of the vibration of the engine cylinder, the clamping force of the first clamping member 201 and the second clamping member 204 on the acoustic probe always maintains the set force (the clamping force is determined by the mass of the counterweight 6; the greater the mass of the counterweight 6, the greater the clamping force on the acoustic probe). Conversely, the smaller the clamping force, the better. This clamping force, under actual application scenarios, is affected by factors such as the ship's actual navigation and falls within a range. The lower limit of this range meets the minimum clamping force requirement for the acoustic probe. This prevents the acoustic probe from becoming loose or shifting, ensuring the accuracy of acoustic signal transmission / collection, i.e., ensuring the accuracy of monitoring carbon deposits on the methanol injector. When the acoustic probe needs to be removed for inspection and maintenance, the pushing component drives the second clamping member 204 to move away from the first clamping member 201 (i.e., it pushes the second piston seal 203 to inject air into the pressure control cylinder 3 to promote...). The first piston seal 7 moves upward, thus releasing the acoustic probe. During installation, the pushing component drives the second clamping component 204 to move a certain distance away from the first clamping component 201, so that the distance between the first clamping component 201 and the second clamping component 204 is greater than the size of the acoustic probe. Then, the acoustic probe is placed between the first clamping component 201 and the second clamping component 204. Subsequently, the pushing component is released, and the second clamping component 204 automatically moves towards the first clamping component 201 under air pressure to achieve clamping. This makes disassembly and assembly convenient and greatly improves the efficiency of inspection and maintenance of the acoustic probe.

[0027] Furthermore, the pneumatic cylinder 202 is provided with a plurality of limiting bosses 205 for preventing the second piston seal 203 from slipping.

[0028] Furthermore, the first clamping member 201 and the second clamping member 204 are provided with limiting grooves 208 that are adapted to the contour of the acoustic probe on opposite sides, and protective pads 209 are provided on the groove walls of the limiting grooves 208. The limiting grooves 208 limit the acoustic probe and improve its clamping stability. The protective pads 209 are preferably made of rubber, which can play a clamping and protective role as well as a certain shock absorption role.

[0029] Please see Figure 1 and Figure 3 In one embodiment of the present invention, the pushing component includes an abutment rod 206 hinged to the first clamping member 201. One end of the abutment rod 206 is used to abut against the second clamping member 204. The carbon deposit monitoring device also includes an operating rod for connecting to the abutment rod 206 to drive the abutment rod 206 to deflect using leverage to push the second clamping member 204 to move away from the first clamping member 201. The operating lever includes a lever body 9 and a plug portion 10 located at one end of the lever body 9. The abutment lever 206 is provided with a slot 8 for inserting the plug portion 10.

[0030] In this embodiment, the operator holds the operating lever and inserts its plug part 10 into the slot 8 on the target abutment rod 206. Then, by deflecting the operating lever, the abutment rod 206 is deflected. One end of the abutment rod 206 abuts against the second clamping member 204, thereby pushing the second clamping member 204 to move away from the first clamping member 201, thus realizing the release action. By setting the operating lever to extend the power arm, the second clamping member 204 can be easily pushed by lever action.

[0031] Furthermore, in this embodiment, the end of the abutment rod 206 that abuts against the second clamping member 204 is provided with a roller 207. By setting the roller 207, the contact between the end of the abutment rod 206 and the second clamping member 204 changes from sliding friction to rolling friction, thereby improving the smoothness of pushing and moving the second clamping member 204.

[0032] Please see Figure 1 and Figure 5 In one embodiment of the present invention, the carbon deposit monitoring device further includes an adaptive component 5 for keeping the pressure control cylinder 3 vertical. The adaptive component 5 includes a frame 501 (fixed on the side wall of the cabin), a first frame 502 disposed on the frame 501, a second frame 503 rotatably disposed on the first frame 502, and a support member 504 rotatably disposed on the second frame 503. The pressure control cylinder 3 is disposed on the support member 504, and the rotation plane of the second frame 503 is perpendicular to the rotation plane of the support member 504.

[0033] In this embodiment, since swaying is inevitable during ship navigation, in order to avoid large fluctuations in the downward pressure of the counterweight 6 on the first piston seal 7 caused by the swaying of the pressure control cylinder 3, this embodiment is proposed to address this issue. Specifically, when the ship sways (methanol dual-fuel engines are typically used in larger ships, which usually adopt a lower GM value (Metacentric Height) design, the swaying characteristics are: slow speed, long period, and potentially large amplitude but relatively gentle), the second frame 503 and the bearing 504 adaptively deflect under the overall gravity of the pressure control cylinder 3, so that the pressure control cylinder 3 is always in a vertical state, thereby ensuring that the counterweight 6 maintains a relatively stable downward pressure on the first piston seal 7.

[0034] Furthermore, in this embodiment, a rotation damper 505 is provided at the rotatable connection between the second frame 503 and the first frame 502, and at the rotatable connection between the support member 504 and the second frame 503. By setting the rotation damper 505, the deflection rate of the second frame 503 and the support member 504 is controlled, so as to achieve smooth deflection movement and effectively suppress the reciprocating swaying of the pressure control cylinder 3.

[0035] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A methanol injector carbon deposit monitoring device based on acoustic wave detection, comprising a plurality of acoustic wave probes arranged outside the engine cylinder via a mounting assembly (2), characterized in that... : The fixed assembly (2) includes a first clamping member (201) and a pneumatic cylinder (202) disposed on the engine block. The carbon deposit monitoring device also includes a vertically arranged pressure control cylinder (3). The pressure control cylinder (3) is provided with a first piston seal (7) and a counterweight (6) on the first piston seal (7). The pneumatic cylinder (202) is provided with a second piston seal (203) and a second clamping member (204) directly opposite to the first clamping member (201) is provided on the second piston seal (203). A common pressure pipe (4) is provided between the pressure control cylinder (3) and the pneumatic cylinder (202). The mounting assembly (2) also includes a pushing component for moving the second clamp (204) away from the first clamp (201) to release the acoustic probe.

2. The methanol injector carbon deposit monitoring device based on acoustic wave detection according to claim 1, characterized in that, The pushing component includes an abutment rod (206) hinged to the first clamping member (201), one end of which is used to abut against the second clamping member (204). The carbon deposit monitoring device also includes an operating rod connected to the abutment rod (206) to use leverage to drive the abutment rod (206) to deflect and push the second clamping member (204) to move away from the first clamping member (201).

3. The methanol injector carbon deposit monitoring device based on acoustic wave detection according to claim 2, characterized in that, The operating lever includes a lever body (9) and a plug-in portion (10) located at one end of the lever body (9). The abutment lever (206) is provided with a slot (8) for the plug-in portion (10) to be inserted.

4. The methanol injector carbon deposit monitoring device based on acoustic wave detection according to claim 2, characterized in that, The abutment rod (206) has a roller (207) at one end that abuts against the second clamping member (204).

5. The methanol injector carbon deposit monitoring device based on acoustic wave detection according to claim 1, characterized in that, The pneumatic cylinder (202) is provided with several limiting bosses (205) for preventing the second piston seal (203) from slipping.

6. The methanol injector carbon deposit monitoring device based on acoustic wave detection according to claim 1, characterized in that, The first clamping member (201) and the second clamping member (204) are provided with limiting grooves (208) that are adapted to the contour of the acoustic probe on opposite sides, and protective pads (209) are provided on the groove wall of the limiting groove (208).

7. The methanol injector carbon deposit monitoring device based on acoustic wave detection according to claim 1, characterized in that, The carbon deposit monitoring device also includes an adaptive component (5) for keeping the pressure control cylinder (3) vertical. The adaptive component (5) includes a frame (501), a first frame (502) disposed on the frame (501), a second frame (503) rotatably disposed on the first frame (502), and a support member (504) rotatably disposed on the second frame (503). The pressure control cylinder (3) is disposed on the support member (504), and the rotation plane of the second frame (503) is perpendicular to the rotation plane of the support member (504).

8. The methanol injector carbon deposit monitoring device based on acoustic detection according to claim 7, characterized in that, Rotation dampers (505) are provided at the rotatable connection between the second frame (503) and the first frame (502) and at the rotatable connection between the bearing member (504) and the second frame (503).

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