Welding airtightness detection device for commercial vehicle tail gas after-treatment product

Abstract

The utility model discloses a commercial vehicle tail gas after-treatment product welding air tightness detection device which comprises a lower bottom plate, supporting blocks are fixed on the periphery of the top of the lower bottom plate, an upper top plate is fixed on the tops of the supporting blocks, a water storage tank is fixed on the top surface of the lower bottom plate, and a test water tank is fixed on the top surface of the upper top plate. Right-angle frames are fixed to the two ends of the testing water tank, the testing water tank communicates with the water storage tank through a water pipe, a pressing structure is arranged in the testing water tank on the left side and comprises an upper support plate, a pressing air cylinder is fixed to the top of the upper support plate, and a pressing upper plate is fixed to the bottom of the upper support plate; a lower support plate is fixed to the bottom side of the testing water tank on the left side, a pressing lower plate corresponding to the pressing upper plate is fixed to the top of the lower support plate, a treated product is placed on the top of the pressing lower plate, and by arranging a pressing structure, the effect of stably pressing the treated product on the top of the pressing lower plate can be achieved.

Description

Technical Field

[0001] This utility model relates to the field of airtightness testing technology, specifically to a welding airtightness testing device for commercial vehicle exhaust aftertreatment products. Background Technology

[0002] Products requiring aftertreatment of vehicle exhaust mainly include catalysts, purifiers (including SCR and DPF), and mufflers, which must meet the requirements of China VI emission standards. Commercial vehicle exhaust aftertreatment products are large in size, with wide and long welds, requiring larger testing equipment and more rational structural design.

[0003] In existing technologies, after commercial vehicles emit exhaust gases, internal weld airtightness testing is required on the processed products. Currently, airtightness testing mostly employs dry testing and hydrostatic testing. However, hydrostatic testing is labor-intensive and the clamping of the processed products is not sufficiently secure, leading to inaccurate airtightness testing and reduced work efficiency. CN201510567113.4 relates to a weld airtightness testing machine, including a worktable, a liquid container disposed under the worktable, and a workpiece placement fixture. It further includes: a vertical motion device connected to the workpiece placement fixture, driving the workpiece placement fixture to move vertically and causing the workpiece placement fixture and the workpiece to rise and fall together to enter or leave the container; a sealing and positioning device disposed on the upper part of the workpiece placement fixture; a workpiece rotation device; a pressurizing mechanism disposed at the workpiece placement fixture; and a control device communicatively connected to the vertical motion device, the sealing and positioning device, and the pressurizing mechanism. This invention also discloses a method for testing weld airtightness using this testing machine. This welding airtightness testing machine, through its first and second cylinders, realizes the entire process of workpiece clamping, positioning, and airtightness testing. The entire device has a simple structure, reliable operation, and a concise process flow. It is particularly suitable for airtightness testing of cylinders, hydraulic cylinders, welded pipes, etc.

[0004] CN 201520790058.0 discloses a welding airtightness testing device, including a workbench with an inclined plate and a sealing frame mounted on it. The inclined plate is connected to the sealing frame, and a support column supports the inclined plate on the workbench. Guide rails are installed on both sides of the inclined plate, and a sliding plate that moves within the guide rails via a cylinder is installed in the middle. This device can perform airtightness testing on small-sized welding sealing boxes with good testing results. However, it does not address issues related to product stability, accuracy of airtightness testing, or work efficiency. Utility Model Content

[0005] The purpose of this utility model is to provide a welding airtightness testing device for commercial vehicle exhaust aftertreatment products, in order to solve the problems that the water pressure testing method is labor-intensive and the clamping of the treated products is not stable enough, resulting in inaccurate airtightness testing and reduced work efficiency.

[0006] To achieve the above objectives, a welding airtightness testing device for commercial vehicle exhaust aftertreatment products is provided, comprising a lower base plate, with support blocks fixed around the top of the lower base plate, an upper top plate fixed to the top of the support blocks, a water tank fixed to the top surface of the lower base plate, the overall height of the water tank being smaller than the height of the upper top plate, a test water tank fixed to the top surface of the upper top plate, right-angle brackets fixed to both ends of the test water tank, the test water tank and the water tank being connected by a water pipe, the interior of the test water tank being divided by a partition, a pressing structure being provided inside the left side of the test water tank, the pressing structure including an upper support plate, a pressing cylinder fixed to the top of the upper support plate, a pressing upper plate fixed to the bottom of the upper support plate, a lower support plate fixed to the bottom side of the left side of the test water tank, a pressing lower plate corresponding to the pressing upper plate fixed to the top of the lower support plate, and a treatment product placed on the top of the pressing lower plate.

[0007] According to the aforementioned commercial vehicle exhaust aftertreatment product welding airtightness testing device, an inflation structure is provided on the left side of the test water tank. The inflation structure includes an inflation pipe, one end of which leads to the interior of the pressing lower plate, and the other end of which passes through the top side of the right-angle frame. A control component is fixed on the outer surface of the inflation pipe, and an air compressor is fixed on the top of the control component.

[0008] According to the aforementioned welding airtightness testing device for commercial vehicle exhaust aftertreatment products, the partition plate has multiple flow holes penetrating its bottom side.

[0009] According to the aforementioned welding airtightness testing device for commercial vehicle exhaust aftertreatment products, a fixing column is fixed around the bottom of the lower base plate, and a fixing disc is fixed at the bottom of the fixing column.

[0010] According to the aforementioned welding airtightness testing device for commercial vehicle exhaust aftertreatment products, a control valve is fixed on the outer surface of the water pipe.

[0011] According to the aforementioned welding airtightness testing device for commercial vehicle exhaust aftertreatment products, baffles are fixed between both sides of the partition and the outer end face of the test water tank.

[0012] Compared with existing technologies, the advantages of this invention are as follows: To test the airtightness of the processed product, the clamping cylinder at the top of the upper support plate is activated, causing the clamping plate at the bottom of the upper support plate to move downwards. When the clamping plate contacts the processed product, since the upper and lower clamping plates are the same size, the processed product on top of the lower clamping plate can be firmly clamped. Then, through the control valve and flow orifice, water from the storage tank flows through the water pipe to a designated position inside the test tank. At this point, the control components are activated, causing the air compressor to work. The airflow from the air compressor is then transmitted to the processed product through the inflation pipe, thus maintaining air pressure inside the processed product. The airtightness of the processed product can then be observed by testing the changes in water flow inside the test tank. The clamping cylinder is convenient, reliable, and improves work efficiency.

[0013] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0015] Figure 1 This is an overall inner view of the welding airtightness testing device for commercial vehicle exhaust aftertreatment products according to this utility model;

[0016] Figure 2 This is a schematic diagram of the clamping structure at point A of the welding airtightness testing device for a commercial vehicle exhaust aftertreatment product according to this utility model.

[0017] Figure 3 This is a schematic diagram of the inner left side of a welding airtightness testing device for commercial vehicle exhaust aftertreatment products according to this utility model.

[0018] Figure 4 This is an overall schematic diagram of a welding airtightness testing device for commercial vehicle exhaust aftertreatment products according to this utility model.

[0019] In the diagram: 1. Lower base plate; 2. Support block; 3. Upper top plate; 4. Water tank; 5. Test water tank; 6. Right-angle bracket; 7. Water pipe; 8. Partition plate; 9. Upper support plate; 10. Pressing cylinder; 11. Pressing upper plate; 12. Lower support plate; 13. Pressing lower plate; 14. Inflation pipe; 15. Control component; 16. Air compressor; 17. Flow hole; 18. Fixed column; 19. Fixed disc; 20. Control valve; 21. Baffle. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figure 1-4 This utility model provides a technical solution: a welding airtightness testing device for commercial vehicle exhaust aftertreatment products, including a lower base plate 1, with support blocks 2 fixed around the top of the lower base plate 1, and an upper top plate 3 fixed to the top of the support blocks 2. A water tank 4 is fixed to the top surface of the lower base plate 1, and the overall height of the water tank 4 is smaller than the height of the upper top plate 3. A test water tank 5 is fixed to the top surface of the upper top plate 3, and right-angle brackets 6 are fixed to both ends of the test water tank 5. The test water tank 5 and the water tank 4 are connected by a water pipe 7. The interior of the test water tank 5 is divided by a partition 8. A pressing structure is provided inside the test water tank 5 on the left side. The pressing structure includes an upper support plate 9, a pressing cylinder 10 fixed to the top of the upper support plate 9, and a pressing upper plate 11 fixed to the bottom of the upper support plate 9. A lower support plate 12 is fixed to the bottom side of the test water tank 5 on the left side, and a pressing lower plate 13 corresponding to the pressing upper plate 11 is fixed to the top of the lower support plate 12. In existing technologies, after commercial vehicles emit exhaust gases, it is necessary to conduct internal welding airtightness tests on the processed products. Currently, airtightness tests are mostly conducted using dry testing and water pressure testing. However, the water pressure testing method is labor-intensive and the clamping of the processed products is not stable enough, resulting in inaccurate airtightness tests and reduced work efficiency. To address this issue, a water pressure test that presses the processed products can be used. The processed products are placed on top of the lower clamping plate 13. Then, by activating the clamping cylinder 10 at the top of the upper support plate 9, the upper clamping plate 11 at the bottom of the upper support plate 9 is moved downwards. When the upper clamping plate 11 comes into contact with the processed products, since the upper clamping plate 11 and the lower clamping plate 13 are of the same size, the processed products on top of the lower clamping plate 13 can be firmly pressed, thereby improving the efficiency of airtightness testing.

[0022] An inflation structure is provided on the left side of the test water tank 5. The inflation structure includes an inflation pipe 14. One end of the inflation pipe 14 leads to the inside of the lower pressing plate 13, and the other end of the inflation pipe 14 passes through the top side of the right-angle frame 6. A control component 15 is fixed to the outer surface of the inflation pipe 14, and an air compressor 16 is fixed to the top of the control component 15. By setting up the inflation structure, the air compressor 16 can be started by activating the control component 15. Then, the airflow inside the air compressor 1 can be transmitted to the inside of the processed product through the inflation pipe 14, thereby maintaining the airflow pressure inside the processed product. The airtightness effect of the processed product can be observed by testing the water flow changes inside the water tank 5.

[0023] Multiple flow holes 17 are provided through the bottom side of the partition plate 8. After the water inside the water tank 4 flows into the right half of the test water tank 5 through the water pipe 7, the multiple flow holes 17 facilitate the flow of water into the left half of the test water tank 5. The bottom plate 1 is fixed with fixed columns 18 around its bottom, and fixed discs 19 are fixed at the bottom of the fixed columns 18. By setting the fixed columns 18 and fixed discs 19, the stability of the overall device is achieved. A control valve 20 is fixed on the outer surface of the water pipe 7 to control the water flow. Baffles 21 are fixed between the two sides of the partition plate 8 and the outer end face of the test water tank 5. By setting the baffles 21, the test water tank 5 is closed on both the front and rear sides.

[0024] Working principle: To test the airtightness of the processed product, the pressing cylinder 10 at the top of the upper support plate 9 is activated, which moves the pressing plate 11 at the bottom of the upper support plate 9 downward. When the pressing plate 11 moves to contact the processed product, since the pressing plate 11 and the pressing lower plate 13 are the same size, the processed product on top of the pressing lower plate 13 can be firmly pressed. Then, through the control valve 20 and the flow hole 17, the water inside the water tank 4 flows into the designated position inside the test water tank 5 through the water pipe 7. At this time, the control component 15 is activated to make the air compressor 16 work. Then, the airflow inside the air compressor 1 can be transmitted to the inside of the processed product through the air filling pipe 14, thereby maintaining the air pressure inside the processed product. The airtightness of the processed product can be observed by the change in the water flow inside the test water tank 5.

[0025] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A welding airtightness testing device for commercial vehicle exhaust aftertreatment products, comprising a lower base plate (1), characterized in that: The bottom plate (1) is fixed with support blocks (2) around its top. A top plate (3) is fixed to the top of each support block (2). A water tank (4) is fixed to the top surface of the bottom plate (1). The overall height of the water tank (4) is smaller than the height of the top plate (3). A test water tank (5) is fixed to the top surface of the top plate (3). Right-angle brackets (6) are fixed to both ends of the test water tank (5). The test water tank (5) and the water tank (4) are connected by a water pipe (7). The inside of the test water tank (5) is... The test water tank (5) on the left side is divided by a partition (8). The test water tank (5) on the left side is equipped with a pressing structure. The pressing structure includes an upper support plate (9). A pressing cylinder (10) is fixed on the top of the upper support plate (9). A pressing upper plate (11) is fixed on the bottom of the upper support plate (9). A lower support plate (12) is fixed on the bottom side of the test water tank (5) on the left side. A pressing lower plate (13) corresponding to the pressing upper plate (11) is fixed on the top of the lower support plate (12). The processing product is placed on the top of the pressing lower plate (13).

2. The welding airtightness testing device for commercial vehicle exhaust aftertreatment products as described in claim 1, characterized in that: The test water tank (5) is provided with an inflation structure on the left side. The inflation structure includes an inflation pipe (14). One end of the inflation pipe (14) leads to the interior of the pressing lower plate (13), and the other end of the inflation pipe (14) passes through the top side of the right angle frame (6). A control component (15) is fixed on the outer surface of the inflation pipe (14), and an air compressor (16) is fixed on the top of the control component (15).

3. The welding airtightness testing device for commercial vehicle exhaust aftertreatment products as described in claim 1, characterized in that: The partition (8) has multiple flow holes (17) penetrating its bottom side.

4. The welding airtightness testing device for commercial vehicle exhaust aftertreatment products as described in claim 1, characterized in that: The bottom plate (1) is fixed with fixing posts (18) around its bottom perimeter, and a fixing disc (19) is fixed to the bottom of the fixing posts (18).

5. The welding airtightness testing device for commercial vehicle exhaust aftertreatment products as described in claim 1, characterized in that: A control valve (20) is fixed on the outer surface of the water pipe (7).

6. The welding airtightness testing device for commercial vehicle exhaust aftertreatment products as described in claim 1, characterized in that: Baffles (21) are fixed between both sides of the partition (8) and the outer end face of the test water tank (5).

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