Tail exhaust pipe airtightness testing device

Abstract

The utility model discloses an air tightness testing device for a tail exhaust pipe. The air tightness testing device comprises a supporting plate, a pressing mechanism, an air inlet pipe, a water storage tank, a lifting mechanism, a controller and an operation panel. Wherein the supporting plate is used for fixing a tail exhaust pipe; the pressing mechanism is arranged on the supporting plate, and the pressing mechanism is used for sealing and pressing the tail exhaust pipe, so that a sealed space is formed in the tail exhaust pipe; one end of the air inlet pipe is communicated with the sealed space, and the other end is connected with a compressed air source. Clear water is stored in the water storage tank; the lifting mechanism is fixedly connected with the supporting plate and can drive the tail exhaust pipe on the supporting plate to be completely immersed in clear water. The controller is electrically connected with the pressing mechanism and the lifting mechanism at the same time. And the operation panel is electrically connected with the controller. According to the utility model, the operation panel can be used to control the movement of the pressing mechanism through one key, the sealing of the exhaust pipe is realized, the operation is simple, convenient and fast, and the test efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of air tightness detection, especially relates to a tail exhaust pipe air tightness testing device. BACKGROUND

[0002] The tail exhaust pipe of a fuel cell system relates to mixed exhaust emission, in order to combine the gas discharged from different positions, and avoid the disturbance between the discharged exhaust, different specifications of branch pipes are usually combined on a main pipe to form different pipes. The branch pipe and the main pipe are usually connected together through welding, which requires higher quality of the welding seam, and the sealing property needs to be ensured under the condition of ensuring the structural strength.

[0003] The existing sealing test method of the tail exhaust pipe is that the soft pipe connected with the compressed air source is connected with each interface of the main pipe and the branch pipe through the use of the throat clamp, and then the compressed air is introduced into the soft pipe to carry out the air tightness test. However, the soft pipe needs to be assembled manually every time a new tail exhaust pipe to be tested is detected, the operation is relatively cumbersome, and the overall test efficiency is low. Moreover, the assembly state of the throat clamp and the soft pipe is unstable, and after being used for many times, the sealing effect of the soft pipe at the joint is not good, which leads to false judgment during the sealing test, and the test result is inaccurate. UTILITY MODEL CONTENTS

[0004] In view of the defects of the prior art, the utility model provides a tail exhaust pipe air tightness testing device. The device is simple to operate and has high test efficiency.

[0005] The utility model realizes the following technical scheme:

[0006] A tail exhaust pipe air tightness testing device comprises:

[0007] A support plate is used for fixing the tail exhaust pipe.

[0008] A pressing mechanism is arranged on the support plate, and the pressing mechanism is used for sealing and pressing the tail exhaust pipe to form a sealed space inside the tail exhaust pipe.

[0009] An air inlet pipe is in communication with the sealed space at one end and is connected with a compressed air source at the other end.

[0010] A water storage tank stores clean water.

[0011] A lifting mechanism is fixedly connected with the support plate and can drive the tail exhaust pipe on the support plate to be completely immersed in the clean water.

[0012] A controller is electrically connected with the pressing mechanism and the lifting mechanism.

[0013] An operation panel is electrically connected with the controller.

[0014] Further, the pressing mechanism comprises a first sealing and pressing assembly for sealing the main pipe of the tail pipe, and the first sealing assembly comprises a sealing cover and at least one second cylinder for driving the sealing cover to seal the main pipe.

[0015] Further, the at least one second cylinder comprises a pair of second cylinders symmetrically arranged on both sides of the sealing cover.

[0016] Further, a second ring groove is formed in the bottom of the sealing cover, and a second sealing member is accommodated in the second ring groove, and the opening edge of the main pipe abuts against the second sealing member.

[0017] Further, a through hole is formed in the end face of the sealing cover, and the through hole is in communication with the air inlet pipe at one end and in communication with the sealing space at the other end.

[0018] Further, the pressing mechanism further comprises a second sealing and pressing assembly for sealing the branch pipe of the tail pipe, and the second sealing and pressing assembly comprises a third cylinder and a side plug, the third cylinder is used for driving the side plug to seal the branch pipe, and a third sealing member is arranged between the side plug and the opening edge of the branch pipe.

[0019] Further, the tail pipe comprises a flange, and the flange is fixedly supported on the support plate, and a first sealing member is arranged between the support plate and the lower surface of the flange.

[0020] Further, the upper surface of the support plate is upwardly protruded to form a positioning pin, and a positioning hole is formed in the flange, and the positioning pin is matched with the positioning hole.

[0021] Further, a transparent observation window is formed in the side wall of the water storage tank.

[0022] Further, the lifting mechanism is installed in the inside of the water storage tank.

[0023] Compared with the prior art, the utility model has the advantages that:

[0024] 1. The tail pipe is sealed by the pressing mechanism, and the movement of the pressing mechanism is controlled by the operation panel, so that the operation is simple, convenient and fast, and the test efficiency is improved.

[0025] 2. The tail pipe is immersed in clean water for testing by using the first cylinder, and the observation window is formed in the water storage tank, so that when the tail pipe leaks, water bubbles are generated, and the test result is clear and easy to find the leakage point.

[0026] 3. The sealing cover and the side plug are driven by the second cylinder and the third cylinder respectively to complete the pressing sealing of the opening edge of the main pipe and the opening edge of the branch pipe of the tail pipe, so that the sealing assembly is more stable, and the measurement result is more accurate. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 It is the assembly view of the tail pipe airtight test device of the utility model one embodiment;

[0028] Figure 2 It is the explosion view of the compression mechanism;

[0029] Figure 3 It is the front view of the tail pipe airtight test device of the utility model one embodiment;

[0030] Figure 4 It is Figure 3 Sectional view along A-A;

[0031] Figure 5 It is Figure 4 Enlarged view of C;

[0032] Figure 6 It is Figure 3 Enlarged view of B;

[0033] Figure 7 It is another assembly view of the tail pipe airtight test device of the utility model one embodiment.

[0034] Label explanation: 11, water storage tank; 12, observation window; 13, moving wheel; 14, drain valve; 15, support plate; 151, positioning pin; 16, air inlet pipe; 17, air inlet branch pipe; 18, first sealing element; 2, lifting mechanism; 211, first fixed seat; 212, first air cylinder; 213, first piston rod; 3, compression mechanism; 31, first sealing compression assembly; 311, second fixed seat; 312, second air cylinder; 313, sealing cover; 314, second piston rod; 315, connecting plate; 316, boss; 317, limiting hole; 318, first fixed column; 319, through hole; 320, second ring groove; 321, second sealing element; 33, second sealing compression assembly; 331, third fixed seat; 332, third air cylinder; 333, side plug; 334, third sealing element; 41, operation panel; 43, electromagnetic valve group; 44, joint; 45, air source processor; 46, display screen; 47, adjusting knob; 48, first button; 49, second button; 50, third button; 6, tail pipe; 61, flange; 62, main pipe; 63, branch pipe; 64, weld; 65, first ring groove; 66, positioning hole; 67, sealing space. DETAILED DESCRIPTION

[0035] The utility model discloses further non-restrictive detailed description of technical scheme with preferred embodiment and its drawings. In the description of the utility model, it is understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" are based on the orientation or positional relationship shown in the drawings. In addition, the terms "first", "second" are only for the purpose of description, and can not be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined as "first", "second" can be explicitly or implicitly included at least one feature. In the description of the utility model, the meaning of "multiple" is at least two, for example two, three, etc., unless otherwise specifically limited. The examples described below by referring to the drawings are exemplary, and are intended to explain the utility model, and can not be understood as limiting the utility model.

[0036] As Figure 1 The tail exhaust pipe airtight test device of an embodiment of the utility model, wherein, tail exhaust pipe 6 includes flange 61, main body pipe 62 and branch pipe 63. Branch pipe 63 is fixedly connected with main body pipe 62 by welding, and main body pipe 62 is fixedly connected with flange by welding, and weld 64 is formed at the welding place. The airtight test device is used to carry out sealing test to tail exhaust pipe 6 and weld 64 on tail exhaust pipe 6. And, the airtight test device includes support plate 15, pressing mechanism 3, air inlet pipe 16, water storage tank 11, lifting mechanism 2, controller (not shown in the figure) and operation panel 41. Wherein, support plate 15 is used to fixedly support tail exhaust pipe 6;Pressing mechanism 3 is arranged on support plate 15, and pressing mechanism 3 is used to seal and press tail exhaust pipe 6, so that the sealed space 67 is formed inside tail exhaust pipe 6;Air inlet pipe 16 one end is communicated with sealed space 67, the other end is connected with compressed air source, and clean water is stored in water storage tank 11;Lifting mechanism 2 is fixedly connected with support plate 15, and can drive tail exhaust pipe 6 on support plate 15 to be completely immersed in clean water. Controller 42 is electrically connected with pressing mechanism 3 and lifting mechanism 2 simultaneously, and operation panel 41 is electrically connected with controller, and is used to send control instruction to controller. By setting pressing mechanism 2 to seal tail exhaust pipe 6, and using operation panel 41 to control the movement of pressing mechanism 2, manual sealing assembly is not needed, and the operation is simple, convenient and fast, and the test efficiency is improved.

[0037] As Figure 1 And Figure 4The material of the water storage tank 11 is preferably aluminum alloy or stainless steel, which is used for storing clean water. A movable wheel 13 is installed at the bottom of the water storage tank 11 to facilitate the movement of the air tightness testing device. An observation window 12 is formed on the front side wall of the water storage tank 11, and a transparent acrylic plate is installed to facilitate observation of the inside of the water storage tank 11. A drain valve 14 is installed at the bottom of the rear side of the water storage tank 11 to facilitate the discharge of clean water in the water storage tank 11.

[0038] Further, the lifting mechanism 2 is installed inside the water storage tank 11. Specifically, the lifting mechanism 2 includes a first fixed seat 211 and a first cylinder 212. The first fixed seat 211 is fixedly connected to the inner surface of the water storage tank 11 by screws (not shown in the figure). The first cylinder 212 is installed on the first fixed seat 211, and the first piston rod 213 of the first cylinder 212 is fixedly connected to the support plate 15 by screws.

[0039] As shown in Figure 2 , the flange 61 of the tail exhaust pipe 6 is fixedly supported on the support plate 15. The flange 61 is provided with a positioning hole 66, and the upper surface of the support plate 15 is protruded upward to form a positioning pin 151, which cooperates with the positioning hole 66 to position the tail exhaust pipe 6, facilitating subsequent sealing and compression. Further, the upper surface of the support plate 15 and the lower surface of the flange 61 are provided with a first sealing element 18. The lower surface of the flange 61 is provided with a first ring groove 65, and the first sealing element 18 is accommodated in the first ring groove 65. The first sealing element 18 realizes the sealing between the bottom of the tail exhaust pipe 6 and the support plate 15, further ensuring the stability of the sealing assembly.

[0040] As shown in Figures 2 to 6 , the compression mechanism 3 includes a first sealing and compression assembly 31 and a second sealing and compression assembly 33. The first sealing and compression assembly 31 is used to seal the main pipe 62, and the second sealing and compression assembly 33 is used to seal the branch pipe 63.

[0041] Further referring to 2 and Figure 5 , the first sealing and compression assembly 31 includes a sealing cover 313 and at least one second cylinder 312, which is used to drive the sealing cover 313 to seal the main pipe 62. The at least one second cylinder 312 includes a pair of second cylinders 312, which are symmetrically arranged on both sides of the sealing cover 313.

[0042] Specifically, the first sealing and pressing assembly 31 further comprises a pair of second fixing seats 311. The second fixing seats 311 are fixedly connected with the support plate 15 by screws, and the second cylinders 312 are installed on the second fixing seats 311. The lower end of the sealing cover 313 is provided with a second annular groove 320, and the second sealing element 321 is accommodated in the second annular groove 320. The opening edge of the main pipe 62 abuts against the second sealing element 321. The upper end of the second fixing seat 311 is provided with a first fixing column 318, and the two ends of the sealing cover 311 outwardly protrude to form bosses 316. The bosses 316 are provided with limiting holes 317, and the limiting holes 317 are slidably sleeved on the first fixing column 318. The second piston rod 314 of the second cylinder 312 is fixedly connected with a connecting plate 315 by screws, and is used to press down the sealing cover 313. When the tail exhaust pipe 6 is sealingly and tightly pressed in place, the lower surface of the boss 316 abuts against the upper surface of the second fixing seat 311, and the upper surface of the boss 316 abuts against the lower surface of the connecting plate 315.

[0043] More specifically, the end face of the sealing cover 313 is provided with a through hole 319. One end of the through hole 319 communicates with the air inlet pipe 16, and the other end communicates with the sealing space 67 formed by the tail exhaust pipe 6. This facilitates the compressed air to enter the sealing space 67 from the air inlet pipe 16, and forms a unique air inlet path, thereby ensuring the stability of the air pressure.

[0044] Further referring to Figure 2 and Figure 6 , the second sealing and pressing assembly 33 comprises a third fixing seat 331, a third cylinder 332 and a side plug 333. The third fixing seat 331 is fixedly connected with the support plate 15 by screws, and the third cylinder 332 is installed on the third fixing seat 331. The third cylinder 332 is used to drive the side plug 333 to seal the branch pipe 63, and a third sealing element 334 is arranged between the side plug 333 and the opening edge of the branch pipe 63.

[0045] Further referring to Figure 7 , the air source processor 45 is further arranged between the air inlet pipe 16 and the compressed air source, and is fixedly connected with the outer side wall of the water storage tank 11 by screws. One end of the air source processor 45 is connected with the compressed air source, and the other end is connected with the air inlet pipe 16. The air source processor 45 is used to filter the moisture in the compressed air and adjust the air pressure of the compressed air entering the air inlet pipe 16 within a certain range. The air inlet branch pipe 17 is connected with the air inlet pipe 16 near the air source processor 45 by the joint 44 to supply air to the cylinder. The electromagnetic valve group 43 is installed on the air inlet branch pipe 17. The electromagnetic valve group 43 is electrically connected with the first cylinder 212, the second cylinder 312 and the third cylinder 332, and the controller is electrically connected with the electromagnetic valve group 43 to control the on-off of the electromagnetic valve group 43, so as to control the operation of the first cylinder 212, the second cylinder 312 and the third cylinder 332.

[0046] The air-tight testing device further comprises a timer (not shown in the figure). The timer is electrically connected with the controller, and is used to set the time of the inflation stage, the pressure maintaining stage and the testing stage in the testing process.

[0047] Referring again to Figure 3 , the operation panel 41 is fixedly connected with the other outer side wall of the water storage tank 11 by means of screws. The operation panel 41 is provided with an adjusting knob 47, by operating which the gas pressure required in the testing, the time required in each stage in the testing process, and the leakage amount and other parameters can be set. The operation panel 41 is further provided with a first button 48, a second button 49 and a third button 50. The first button 48 is used to control the operation of the second cylinder 312 and the third cylinder 332; the second button 49 is used to control the operation of the first cylinder 212; and the third button 50 is used to start the testing, and to introduce the compressed air according to the set parameters. The operation panel 41 is further provided with a display screen 46, which is used to display the measurement state and record the measurement results.

[0048] In use, an appropriate amount of clean water is added into the water storage tank 11, and the gas source processor 45 is connected with the compressed air. The first piston rod 213 of the first cylinder 212 is in the extended state, so that the bottom surface of the support plate 15 is above the water surface. The first sealing member 18 is installed into the first annular groove 65 at the bottom of the tail pipe 6, and then the tail pipe 6 is installed on the support plate 15. Then the second sealing member 321 is installed into the second annular groove 320 of the sealing cover 313, and then the sealing cover 313 is placed on the upper end surface of the tail pipe 6.

[0049] The first button 48 is started, and the second cylinder 312 and the third cylinder 332 start to operate. The second cylinder 312 drives the connecting plate 315 to press down the sealing cover 313, so that the second sealing member 321 is tightly sealed with the pipe opening of the main pipe 62 of the tail pipe 6, and the first sealing member 18 is tightly sealed with the upper surface of the support plate 15; the third cylinder 332 drives the side plug 333 to move, and the third sealing member 334 is tightly sealed with the pipe opening of the branch pipe 63 of the tail pipe 6.

[0050] The second button 49 is started, and the first cylinder 212 starts to operate. The first piston rod 313 starts to contract, and drives the support plate 15 to move downward, so that the tail pipe 6 is completely immersed in the water.

[0051] When the third button 50 is started, compressed gas enters the sealed space 67 according to the set air pressure, and inflation, pressure maintaining and testing are performed according to the set time. During the testing, whether bubbles are generated in the water storage tank 11 is observed through the observation window 12. When no bubbles are generated, it is indicated that the sealing is good and there is no air leakage point; when bubbles are generated, it is indicated that there is an air leakage point in the weld. At the same time, the display screen 46 is observed, and if the leakage amount or pressure drop exceeds the set value, the system automatically alarms. After the testing is completed, the control system automatically saves the testing results and generates a testing report for archiving.

[0052] The tail pipe airtight testing device of the embodiment of the utility model, through setting up the pressing mechanism 3 to seal the tail pipe 6, and using the operation panel 41 one button control the movement of the pressing mechanism 3, do not need manual sealing assembly, operation is simple, convenient and fast, improve testing efficiency. The second cylinder 312 and the third cylinder 332 drive the sealing cover 313 and the side plug 333 respectively to complete the pressing sealing of the open edge of the main pipe 62 and the branch pipe 63 of the tail pipe 6, so that the sealing assembly is more stable, and the measurement result is more accurate. The first cylinder 212 is used to drive the tail pipe 6 to be immersed in clean water for testing, and the observation window 12 is arranged on the water storage tank 11, so that the test result is clear and accurate, and when the tail pipe 6 leaks, the air leakage point can be found. The through hole 319 is arranged on the sealing cover 313 to communicate the air inlet pipe 16 and the sealed space 67, and only one air inlet path is formed, so that the air inlet pressure is more stable.

[0053] The above-mentioned embodiments only express several implementation manners of the utility model, and the description is more specific and detailed, but it cannot be understood as the limitation of the patent scope of the utility model. It should be pointed out that for ordinary skilled persons in the art, without departing from the concept of the utility model, several modifications and improvements can be made, which belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent should be subject to the appended claims.

Claims

1. A tailpipe gas tightness testing device, characterized in that, The utility model relates to a tail pipe sealing device, including: Supporting plate (15) for fixing the tail pipe (6); Compression mechanism (3), the compression mechanism (3) is arranged on the supporting plate (15), and the compression mechanism (3) is used to seal the tail pipe (6) tightly, so that the tail pipe (6) forms sealed space (67) inside; Air inlet pipe (16), one end of the air inlet pipe (16) is communicated with the sealed space (67), and the other end is connected with compressed air source; Water storage tank (11), the water storage tank (11) stores clean water; Lifting mechanism (2), the lifting mechanism (2) is fixedly connected with the supporting plate (15), and the tail pipe (6) on the supporting plate (15) can be driven to be completely immersed in clean water; Controller, the controller is electrically connected with the compression mechanism (3) and lifting mechanism (2) simultaneously; Operation panel (41), the operation panel (41) is electrically connected with the controller.

2. The tailpipe airtightness testing apparatus of claim 1, wherein, The compression mechanism (3) includes first sealing and pressing assembly (31), and the first sealing and pressing assembly (31) is used for sealing the main pipe (62) of the tail pipe (6), and the first sealing and pressing assembly (31) includes sealing cover (313) and at least one second air cylinder (312), and the second air cylinder (312) is used to drive the sealing cover (313) to seal the main pipe (62).

3. The tailpipe airtightness testing apparatus of claim 2, wherein, The at least one second air cylinder (312) includes a pair of second air cylinders (312), which are symmetrically arranged on both sides of the sealing cover (313).

4. The tailpipe airtightness testing apparatus of claim 2, wherein, The bottom of the sealing cover (313) is provided with a second ring groove (320), and a second sealing element (321) is accommodated in the second ring groove (320), and the opening edge of the main pipe (62) is in abutment with the second sealing element (321).

5. The tailpipe airtightness testing apparatus of claim 2, wherein, A through hole (319) is formed in the end face of the sealing cover (313), and one end of the through hole (319) is communicated with the air inlet pipe (16), and the other end is communicated with the sealed space (67).

6. The tailpipe airtightness test device of claim 1, wherein, The compression mechanism (3) further includes second sealing and pressing assembly (33), and the second sealing and pressing assembly (33) is used for sealing the branch pipe (63) of the tail pipe (6), and the second sealing and pressing assembly (33) includes third air cylinder (332) and side plug (333), the third air cylinder (332) is used to drive the side plug (333) to seal the branch pipe (63), and the side plug (333) and the opening edge of the branch pipe (63) are provided with third sealing element (334).

7. The tailpipe airtightness test device of claim 1, wherein The tail pipe (6) includes flange (61), the flange (61) is fixedly supported on the supporting plate (15), and the first sealing element (18) is arranged between the supporting plate (15) and the flange (61).

8. The tailpipe airtightness testing apparatus of claim 7, wherein, The upper surface of the supporting plate (15) is upwardly protruded to form a positioning pin (151), and the flange (61) is provided with a positioning hole (66), and the positioning pin (151) is matched with the positioning hole (66).

9. The tailpipe airtightness testing apparatus of claim 1, wherein, A transparent observation window (12) is formed in the sidewall of the water storage tank (11).

10. The tailpipe airtightness test device of claim 1, wherein, The lifting mechanism (2) is installed inside the water storage tank (11).

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