Laser welding detection device for liquid level switch of diesel engine

Abstract

A laser welding detection device for a liquid level switch of a diesel engine comprises a tool body, a tool guiding fastener, a tool test sealing end cover, a gas circuit conversion chuck, a tool test bottom sealing plug and an end cover rubber sealing ring, the tool testing sealing end cover is connected with an upper welding pipe of a liquid level switch shell to be detected, the gas circuit conversion chuck is connected with an external gas circuit connecting pipe and is combined with an upper external thread of the tool testing sealing end cover, and the tool testing bottom sealing plug is arranged at a lower port of a fork connecting pipe of the liquid level switch shell to be detected. The bottom is sealed in the detection process. According to the utility model, by introducing a process detection mechanism and optimizing a welding quality test process, unqualified products can be quickly identified and rejected in an early stage, and the unqualified products are effectively prevented from entering a subsequent production process, so that the production efficiency and the product quality stability are remarkably improved, and the risk of occurrence of quality problems is greatly reduced.

Description

Technical Field

[0001] The utility model relates to the field of testing the tuning fork liquid level switch of medium and high speed marine diesel engines; in particular to a laser welding detection device for the liquid level switch of a diesel engine. Background Art

[0002] With the development of the shipbuilding industry, as the core component of the ship power system, the operation stability and reliability of medium and high speed marine diesel engines have been increasingly emphasized. Medium and high speed diesel engines usually include multiple key systems, such as lubricating oil system, fuel system, cooling water system, compressed air system and intake and exhaust system, and these systems jointly maintain the efficient and safe operation of the engine. Among them, the fuel system is responsible for supplying the necessary fuel to the engine, while the cooling water system effectively maintains the temperature of components such as cylinder liners and cylinder heads within a reasonable range through circulating cooling water to prevent overheating damage.

[0003] In these systems, the accurate monitoring of the liquid level is crucial. As a non-contact liquid level detection device, the tuning fork liquid level switch is widely used in the fuel system and cooling water system due to its high precision, high stability and good environmental adaptability, for real-time monitoring of the liquid level and detection of potential leakage situations.

[0004] However, there are certain limitations in the existing production and detection processes of tuning fork liquid level switches. The traditional method is usually to conduct unified welding quality detection after the overall welding of the test pieces is completed. Although this method can ensure the final quality of the products to a certain extent, it is difficult to immediately discover and solve problems during the welding process, resulting in unqualified products possibly flowing into subsequent processes, increasing production costs and time costs. Summary of the Utility Model

[0005] In order to overcome the above deficiencies of the existing technology, the utility model proposes a laser welding detection device for the liquid level switch of a diesel engine. On the basis of ensuring that the overall quality testing function after traditional welding is not affected, process welding quality detection is introduced, that is, after each welding process is completed, the welding quality is immediately tested to achieve the immediate discovery and correction of welding defects, comprehensively improving the monitoring ability of the welding quality of products. It not only greatly improves production efficiency, but also reduces production costs by reducing the subsequent processing flow of unqualified products. At the same time, the accumulated process data also provides valuable reference for the continuous optimization of the welding process, promoting the overall improvement of product quality.

[0006] The technical solution of the utility model is as follows:

[0007] A laser welding detection device for a diesel engine liquid level switch, characterized in that it includes a tooling body (5), a tooling guiding fastener (6), a tooling test sealing end cover (3), a gas path conversion chuck (2), a tooling test bottom sealing plug (7) and an end cover rubber sealing ring (4), wherein,

[0008] The tooling body (5) is used to support and position the liquid level switch housing to be detected;

[0009] The tooling guiding fastener (6) is arranged on the tooling body (5) and is used to guide and fix the liquid level switch housing to be detected;

[0010] The tooling test sealing end cover (3) is connected to the upper welding pipe (A) of the liquid level switch housing to be detected, and an end cover rubber sealing ring (4) is arranged inside to achieve sealing;

[0011] The gas path conversion chuck (2) is connected to an external gas path connecting pipe (1) and is combined with the upper external thread of the tooling test sealing end cover (3) through an internal thread to introduce gas into the liquid level switch housing to be detected for welding quality detection;

[0012] The tooling test bottom sealing plug (7) is arranged at the lower port of the fork-shaped connecting pipe (C) of the liquid level switch housing to be detected and is used to seal the bottom during the detection process.

[0013] The tooling body (5) and the tooling guiding fastener (6) are designed to adapt to liquid level switch housings of different sizes, so as to expand the use range of the tooling.

[0014] Preferably, the connection between the tooling test sealing end cover (3) and the upper welding pipe (A) of the liquid level switch housing to be detected adopts a threaded connection, and sealing is achieved through the end cover rubber sealing ring (4) to ensure airtightness during the detection process.

[0015] On the other hand, the present invention also provides a detection method using the above-mentioned laser welding detection device for a diesel engine liquid level switch, characterized in that it includes the steps:

[0016] Insert the test piece into the tooling body (5) from the top, and after positioning by the guiding fastener (6), place the tooling test bottom sealing plug (7) at the lower port of the fork-shaped connecting pipe to ensure the sealing during the test process;

[0017] Screw the guiding fastener (6) into the lower thread of the middle connecting body (B) of the test piece to complete the overall stable installation;

[0018] Place the end cover rubber sealing ring (4) inside the tooling test sealing end cover (3) and connect it to the upper welding pipe (A) of the test piece through a threaded connection, and the entire test device is ready for a comprehensive welding quality detection.

[0019] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0020] 1) Enhance the welding quality control of the tuning fork level switch throughout the entire production cycle. By introducing a process detection mechanism, optimize the welding quality testing process. This device not only provides an efficient process welding quality detection scheme but also can quickly identify and eliminate unqualified products at an early stage, effectively preventing them from entering the subsequent production process, thereby significantly improving production efficiency and product quality stability and greatly reducing the risk of quality problems.

[0021] 2) Adopt an integrated test design, which can cover the comprehensive detection of multiple welding parts and is applicable to the welding quality detection requirements of multiple products in the same series. It not only reduces the number of devices required on the production line, lowers costs, but also greatly broadens the application scope of the device, improves the use efficiency and flexibility of the device, and provides strong technical support for the lean production and quality control of enterprises.

[0022] 3) Simplify the operation method, improve work efficiency, reduce the probability of quality problems, and are applicable to the welding quality detection of products in the same series. Description of the Drawings

[0023] Figure 1 General assembly drawing of the laser welding detection device for the diesel engine level switch;

[0024] Figure 2 Test piece and weld bead structure diagram

[0025] Figure 3 General assembly drawing of the test piece test tooling (test process 1)

[0026] Figure 4 General assembly drawing of the test piece test tooling (test process 2)

[0027] In the figure: 1. Air pipe connection 2. Air path conversion chuck 3. Tooling test sealing end cover 4. End cover rubber sealing ring 5. Tooling body 6. Tooling guiding fastener 7. Tooling test bottom sealing plug 8. Third weld bead of the test piece 9. Second weld bead of the test piece 10. First weld bead of the test piece A. Upper welding pipe of the test piece B. Middle connection body of the test piece C. Fork body connection pipe of the test piece D. Fork body of the test piece Detailed Implementation Modes

[0028] The technical solutions of the present utility model will be further described below in conjunction with the drawings and embodiments, but the protection scope of the present utility model should not be limited thereby.

[0029] Please refer to Figure 1 , Figure 1This is the general assembly drawing of the laser welding detection device for the diesel engine liquid level switch of the utility model. As shown in the figure, a laser welding detection device for a diesel engine liquid level switch includes a tooling body (5), a tooling guiding fastener (6), a tooling test sealing end cover (3), a gas path conversion chuck (2), a tooling test bottom sealing plug (7), and an end cover rubber sealing ring (4).

[0030] The tooling body (5) serves as the core support structure, compatible with and stably supporting liquid level switch housings of various sizes, enhancing the versatility and flexibility of the device. The tooling guiding fastener (6) is installed on the tooling body (5), and through the guiding and fastening mechanism, it realizes the firm fixation of different specifications of housings, ensuring the correct progress of the detection process. The tooling test sealing end cover (3) is threadedly connected to the upper welding pipe (A) of the liquid level switch housing, and a high-quality end cover rubber sealing ring (4) is embedded inside, constructing a sealing barrier, effectively preventing gas leakage during the detection process and ensuring the accuracy of the detection results. The gas path conversion chuck (2), as the hub of the gas channel, seamlessly docks with the external gas path connecting pipe (1), and through the internal thread, it tightly fits with the external thread on the upper part of the tooling test sealing end cover (3), ensuring that gas flows smoothly and stably into the liquid level switch housing to be detected, providing a reliable guarantee for the comprehensive detection of welding quality.

[0031] In addition, the tooling test bottom sealing plug (7) is placed at the lower port of the fork body connecting pipe (C), effectively sealing potential air leakage points during the detection process and further enhancing the overall sealing performance of the detection system.

[0032] The designs of the tooling body (5) and the tooling guiding fastener (6) are adapted to liquid level switch housings of different sizes to expand the usage range of the tooling. The connection between the tooling test sealing end cover (3) and the upper welding pipe (A) of the liquid level switch housing to be detected is a threaded connection, and sealing is achieved through the end cover rubber sealing ring (4) to ensure airtightness during the detection process.

[0033] The external gas path connecting pipe (1) realizes a convenient and firm connection with the help of the gas path conversion chuck (2). This chuck tightly fits with the external thread on the upper part of the tooling test sealing end cover (3) through its internal precise thread, ensuring the tightness of the gas path connection and the high efficiency of operation.

[0034] In the precise production process of a tuning fork level switch, high-precision welding needs to be carried out successively between the upper welding pipe (A), the middle connecting body (B), the fork body connecting pipe (C) and the fork body (D). After welding is completed, place the end cover rubber seal ring (4) inside the tooling test sealing end cover (3); connect the tooling test sealing end cover (3) to the upper welding pipe (A) of the test piece through thread connection; the rubber seal ring has a good sealing effect. This connection can be used for the welding quality inspection of the first weld bead, the second weld bead, and the third weld bead after the overall welding of the tuning fork level switch; at the same time, it can also be applied to the welding quality inspection of products in the same series; greatly increasing the usage frequency of the detection device.

[0035] During the production process of the tuning fork level switch, especially the welding quality of the third weld bead (8) and the second weld bead (9) directly affects the quality of the product; because this part needs to be immersed in the solution for a long time after being installed at the designated station; after each welding process, the welding quality needs to be detected.

[0036] Insert the test piece from the upper port of the tooling body (5) from the lower end and pass through the guiding fastener (6) in sequence, place the bottom sealing plug (7) at the lower port of the fork body connecting pipe, and finally screw the guiding fastener (6) into the lower thread of the middle connecting body (B) of the test piece.

[0037] Then place the end cover rubber seal ring (4) inside the tooling test sealing end cover (3); connect the tooling test sealing end cover (3) to the upper welding pipe (A) of the test piece through thread connection; then the test can be realized.

[0038] In the special inspection of the laser welding and sealing quality of the tuning fork level alarm switch housing in the fuel supply system, cooling system, etc. of marine medium and high-speed diesel engines, the present utility model adopts a test device to simultaneously detect the welding quality of multiple welding parts; and it can be applied to the detection work of the welding quality of products in the same series; making the device reduce the number of sets of equipment, increase the scope of use of the equipment, improve the utilization rate of the equipment during the specific production and use process, ensuring the welding quality when the tuning fork level alarm switch is laser welded; providing guarantee for the subsequent quality of the product; and at the same time, it can also meet the sealing test after welding of products of different sizes in the same series; expanding the scope of application of the equipment. Through the matching combination of the special inspection device mechanism, it can be applied to the sealing inspection work after welding of the tuning fork level switch at different production stages; effectively avoiding unqualified products from flowing into the next production process, effectively improving production efficiency, shortening the production cycle, and saving production costs.

Claims

1. A laser welding detection device for a diesel engine liquid level switch, characterized in that, It includes a tooling body (5), a tooling guiding fastener (6), a tooling test sealing end cover (3), a gas path conversion chuck (2), a tooling test bottom sealing plug (7), and an end cover rubber sealing ring (4). Among them, the tooling body (5) is used to support and position the liquid level switch housing to be detected; the tooling guiding fastener (6) is arranged on the tooling body (5) and is used to guide and fix the liquid level switch housing to be detected; the tooling test sealing end cover (3) is connected to the upper welding pipe (A) of the liquid level switch housing to be detected, and an end cover rubber sealing ring (4) is arranged inside it to achieve sealing; the gas path conversion chuck (2) is connected to an external gas path connecting pipe (1) and is combined with the upper external thread of the tooling test sealing end cover (3) through an internal thread to introduce gas into the liquid level switch housing to be detected for welding quality detection; the tooling test bottom sealing plug (7) is arranged at the lower port of the fork connection pipe (C) of the liquid level switch housing to be detected and is used to seal the bottom during the detection process.

2. The diesel engine liquid level switch laser welding detection device according to claim 1, wherein, The designs of the tooling body (5) and the tooling guiding fastener (6) are adapted to liquid level switch housings of different sizes to expand the application range of the tooling.

3. The diesel engine liquid level switch laser welding detection device according to claim 1, characterized in that, The connection between the tooling test sealing end cover (3) and the upper welding pipe (A) of the liquid level switch housing to be detected adopts a threaded connection, and sealing is achieved through the end cover rubber sealing ring (4) to ensure airtightness during the detection process.

Images