Dual-station air tightness testing device for automobile exhaust duct connecting pipe

Abstract

The present invention belongs to the field of bellows detection technology, and in particular, is a double-station air tightness detection device for automobile exhaust duct connecting pipes. The following scheme is proposed, including a workbench, a first conveyor arranged on one side of the workbench, a sensor arranged on one side of the first conveyor, a second conveyor arranged below the workbench, and a horizontal moving mechanism, a clamping mechanism, an adjusting mechanism, a detection mechanism, and a feeding mechanism arranged on the workbench. The present invention sets a horizontal moving mechanism and a clamping mechanism, and the first motor drives the first screw to rotate, so that the connecting block drives the group of clamping mechanisms to be transported to the top of the connecting pipe, starts the two-way cylinder to expand the distance between the two groups of clamping claws, starts the one-way cylinder to move toward the bellows, and after the clamping claws reach both sides of the bellows, drives the two-way cylinder to contract to clamp the connecting pipe through the two groups of clamping claws. The horizontal mechanism can drive the two groups of clamping mechanisms to clamp the connecting pipe, and the connecting pipe is placed in the corresponding position, and the processing is fully automated.

Description

Technical field:

[0001] The invention relates to the technical field of bellows detection, and in particular to a double-station air tightness detection device for a connecting pipe of an automobile exhaust duct. Background technology:

[0002] With the development of economy, people's living standards have gradually improved, and cars have become a common means of transportation in daily life. Among them, the demand for the production of auto parts has become more and more, and the manufacturers are also constantly developing.

[0003] The automobile exhaust duct connecting pipe is also a part of automobile accessories. After its processing is completed, it is usually necessary to perform an air tightness test for normal use. However, the existing automobile exhaust duct connecting pipe air tightness detection device is usually semi-automatic or manual, which takes a long time and has low efficiency, affecting the progress of post-processing detection. Summary of the invention:

[0004] The purpose of the present invention is to provide a double-station air tightness detection device for automobile exhaust duct connecting pipes in view of the defects of the prior art, so as to solve the problems of long detection time, low efficiency and influence on the detection progress after processing.

[0005] A double-station air tightness detection device for a connecting pipe of an automobile exhaust duct comprises a workbench, a first conveyor arranged on one side of the workbench, a sensor arranged on one side of the first conveyor, a second conveyor arranged below the workbench, and a horizontal moving mechanism, a clamping mechanism, an adjusting mechanism, a detecting mechanism and a feeding mechanism arranged on the workbench, wherein the horizontal moving mechanism is composed of two groups, both of which are installed on two groups of brackets vertically arranged on the workbench, and the horizontal moving mechanism comprises a first motor, a first lead screw, a sliding rod and a connecting block, wherein the first motor is installed on one side of one group of the brackets, the first lead screw is rotatably installed between the two groups of the brackets, and one end of the first lead screw is fixedly connected to the output end of the first motor, the sliding rod is fixedly installed between the two groups of the brackets and is located above the first lead screw, the connecting block is installed on the sliding rod and the first lead screw, the connecting block slides on the sliding rod, the connecting block is rotatably connected to the first lead screw, and driving the first motor through the first lead screw can drive the connecting block to move laterally along the sliding rod;

[0006] The clamping mechanism is installed on the horizontal moving mechanism, and includes a one-way cylinder, a two-way cylinder and a clamping claw. The one-way cylinder is installed at the bottom of the connecting block, and the two-way cylinder is installed at the output end of the one-way cylinder. The clamping claw is two sets symmetrically installed at the two output ends of the two-way cylinder.

[0007] The adjusting mechanism is installed on the workbench and includes a sliding plate, a slide rail, a second motor, a second lead screw and a fixed table. The two groups of slide rails are fixedly installed on the workbench. The sliding plate slides on the slide rail. The fixed table is fixedly installed on the workbench. The second motor is installed on the fixed table and is rotationally connected to the sliding plate through the second lead screw. Driving the second motor can drive the sliding plate to slide along the slide rail through the second lead screw;

[0008] There are two groups of the detection mechanisms, which are installed on the sliding plate and the fixed table respectively in a pairwise opposite manner, and include a positioning cylinder, a positioning disk, an air inlet and an air outlet. The positioning disk is fixedly installed on the positioning cylinder. The air inlet is installed at the upper end of the positioning disk. The air outlet is opened in the middle of the opposite surfaces of the two groups of positioning disks and is communicated with the air inlet.

[0009] The blanking mechanism is installed at one side end of the second conveyor and extends above the workbench, and includes a blanking cylinder, a support frame, an auxiliary rod, a receiving platform and a guiding plate. The support frame is installed at one side end of the second conveyor. The blanking cylinder passes through the support frame through a piston rod, and its top end is fixedly connected to the receiving platform. The two groups of auxiliary rods are symmetrically fixedly installed at the bottom of the receiving platform relative to the piston rod of the blanking cylinder, and their bottom ends penetrate and slide on the support frame. A guiding plate is installed on the upper end surface of the support frame and is located directly below the receiving platform;

[0010] The sensor is fixedly installed on one side of the first conveyor through a baffle.

[0011] By adopting the above technical solution, the connecting pipe transported from the first conveyor can be detected by the sensor.

[0012] The bracket is arranged in a "冂"-shaped structure, and one of the brackets is arranged above the first conveyor.

[0013] By adopting the above technical solution, the clamping mechanism can operate normally above the connecting pipe and perform clamping.

[0014] The upper end surface of the sliding plate and the upper end surface of the fixed table are on the same horizontal plane.

[0015] By adopting the above technical solution, the detection mechanisms arranged in a pairwise opposite manner can be on the same horizontal plane.

[0016] The vertical cross-section of the connecting block is arranged in an L-shaped structure, and the protruding sides of the bottom ends of the two groups of connecting blocks are arranged oppositely.

[0017] By adopting the above technical solution, the vertical central axes of the two groups of clamping mechanisms can be on the same vertical cross-section.

[0018] A material discharge trough is provided on the workbench at one side of the material discharge mechanism, and a collecting box with a diameter larger than that of the material discharge trough is provided below the material discharge trough.

[0019] By adopting the above technical solution, the connecting pipe with poor air tightness can be placed in the collection box.

[0020] The upper end of the material receiving platform is provided with four groups of material receiving claws evenly spaced apart, and the receiving plates are provided in four groups. The four groups of material receiving claws and the four groups of brackets are staggeredly distributed, so that the material receiving platform can move to the intervals between the receiving plates when moving downward.

[0021] By adopting the above technical solution, the material receiving platform can be lowered normally, and the connecting pipe can be guided to the second conveyor through the guide plate.

[0022] The receiving plate is an acute-angle triangular plate, one side of which extends above the conveyor belt of the second conveyor.

[0023] By adopting the above technical solution, when the material receiving platform descends, the connecting pipe can be guided to the second conveyor through the guide plate.

[0024] The vertical center axes of the two groups of clamping mechanisms are on the same vertical section.

[0025] By adopting the above technical solution, the two groups of clamping mechanisms can clamp the connecting pipe at the same position.

[0026] The beneficial effects of the double-station air tightness detection device for automobile exhaust duct connecting pipe of the present invention are:

[0027] 1. By setting a horizontal moving mechanism and a clamping mechanism, start a set of horizontal moving mechanisms corresponding to the clamping mechanism, drive the first lead screw to rotate through the first motor, and then drive the connecting block to slide along the slide bar, so that the connecting block drives the clamping mechanism to be transported to the top of the connecting pipe. At this time, start the two-way cylinder to expand the distance between the two sets of clamping claws, and start the one-way cylinder to move toward the corrugated pipe. After the clamping claws reach both sides of the corrugated pipe, the two-way cylinder is driven to contract again to clamp the connecting pipe through the two sets of clamping claws. The horizontal mechanism can drive the two sets of clamping mechanisms to clamp the connecting pipe and place the connecting pipe at the corresponding position, which is fully automated.

[0028] 2. By setting up a material unloading mechanism, after the inspection is completed, another set of horizontal moving mechanisms can be driven to drive another set of clamping mechanisms to clamp the connecting pipe. When the air tightness of the connecting pipe is good, the clamping mechanism can be driven by the horizontal moving mechanism to be transported to the material receiving platform, and the connecting pipe can be placed on the material receiving platform. Then the material unloading cylinder is driven to contract, and the material receiving platform is driven downward by its piston rod. Because the material receiving platform and the receiving plate are staggered, when the material receiving platform descends to the receiving plate, the connecting pipe will be lifted by the receiving plate and rolled along the slope of the receiving plate to the second conveyor, and then transported to the next procedure for storage by the second conveyor, which is convenient for subsequent processing of the inspected connecting pipe.

[0029] 3. By setting up an adjustment mechanism, since the lengths of the connecting pipes may vary, if the connecting pipe is shorter and the extension length of the positioning cylinder is limited, the second motor can be driven to drive the second lead screw to rotate, thereby causing the slide plate to approach the fixed platform along the slide rail, thereby shortening the distance between the two relatively arranged detection mechanisms, so that the positioning cylinder can push the positioning plate to clamp and seal the two ends of the connecting pipe. Description of the drawings:

[0030] Figure 1 This is a schematic diagram of the overall structure of the double-station air tightness detection device for the automobile exhaust duct connecting pipe proposed by the present invention;

[0031] Figure 2 This is a first-view diagram of the double-station air tightness detection device for the automobile exhaust duct connecting pipe proposed by the present invention;

[0032] Figure 3 This is a second viewing angle diagram of the double-station air tightness detection device for the automobile exhaust duct connecting pipe proposed by the present invention;

[0033] Figure 4 A third viewing angle diagram of the double-station air tightness detection device for the automobile exhaust duct connecting pipe proposed by the present invention;

[0034] Figure 5 The present invention provides a diagram of the feeding mechanism of the double-station air tightness detection device for the automobile exhaust duct connecting pipe.

[0035] In the figure: 1. workbench; 2. first conveyor; 3. baffle; 4. sensor; 5. bracket; 6. horizontal moving mechanism; 601. first motor; 602. first lead screw; 603. slide rod; 604. connecting block; 7. clamping mechanism; 701. one-way cylinder; 702. two-way cylinder; 703. clamping claw; 8. adjusting mechanism; 801. slide plate; 802. slide rail; 803. second motor; 804. second lead screw; 805. fixed table; 9. detection mechanism; 901. positioning cylinder; 902. positioning plate; 903. air inlet; 904. air outlet; 10. unloading mechanism; 1001. unloading cylinder; 1002. support frame; 1003. auxiliary rod; 1004. receiving platform; 1005. receiving plate; 11. second conveyor; 12. unloading trough; 13. collecting box. Specific implementation method:

[0036] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0037] Reference Figure 1-5 A double-station air tightness detection device for a connecting pipe of an automobile exhaust duct comprises a workbench 1, a first conveyor 2 arranged at one side of the workbench 1, a sensor 4 arranged at one side of the first conveyor 2, a second conveyor 11 arranged below the workbench 1, and a horizontal moving mechanism 6, a clamping mechanism 7, an adjusting mechanism 8, a detecting mechanism 9 and a feeding mechanism 10 arranged on the workbench 1. The horizontal moving mechanism 6 is composed of two groups, both of which are installed on two groups of brackets 5 vertically arranged on the workbench 1. The horizontal moving mechanism 6 comprises a first motor 601, a first lead screw 602, a sliding rod 603 and a connecting block. 604, the first motor 601 is installed on one side of one group of brackets 5, the first lead screw 602 is rotatably installed between the two groups of brackets 5, and one end of the first motor 601 is fixedly connected to the output end, the slide bar 603 is fixedly installed between the two groups of brackets 5 and located above the first lead screw 602, the connecting block 604 is installed on the slide bar 603 and the first lead screw 602, the connecting block 604 slides on the slide bar 603, and the connecting block 604 is rotatably connected with the first lead screw 602, and the first motor 601 is driven through the first lead screw 602 to drive the connecting block 604 to move laterally along the slide bar 603;

[0038] The clamping mechanism 7 is installed on the horizontal moving mechanism 6, and includes a one-way cylinder 701, a two-way cylinder 702 and a clamping claw 703. The one-way cylinder 701 is installed at the bottom of the connecting block 604, the two-way cylinder 702 is installed at the output end of the one-way cylinder 701, and the clamping claw 703 is symmetrically installed at the two output ends of the two-way cylinder 702 in two groups.

[0039] The adjusting mechanism 8 is installed on the workbench 1 and includes a sliding plate 801, a sliding rail 802, a second motor 803, a second lead screw 804 and a fixed platform 805. There are two groups of sliding rails 802 fixedly installed on the workbench 1. The sliding plate 801 slides on the sliding rails 802. The fixed platform 805 is fixedly installed on the workbench 1. The second motor 803 is installed on the fixed platform 805 and is rotationally connected to the sliding plate 801 through the second lead screw 804. Driving the second motor 803 can drive the sliding plate 801 to slide along the sliding rails 802 through the second lead screw 804;

[0040] There are two groups of detection mechanisms 9, which are installed on the sliding plate 801 and the fixed platform 805 respectively in pairs and opposite to each other. They include a positioning cylinder 901, a positioning disk 902, an air inlet 903, and an air outlet 904. The positioning disk 902 is fixedly installed on the positioning cylinder 901. The air inlet 903 is installed at the upper end of the positioning disk 902. The air outlet 904 is opened in the middle of the opposite surfaces of the two groups of positioning disks 902 and is connected to the air inlet 903;

[0041] The blanking mechanism 10 is installed at one side end of the second conveyor 11 and extends above the workbench 1. It includes a blanking cylinder 1001, a support frame 1002, an auxiliary rod 1003, a receiving platform 1004 and a guiding plate 1005. The support frame 1002 is installed at one side end of the second conveyor 11. The blanking cylinder 1001 passes through the support frame 1002 through the piston rod, and its top end is fixedly connected to the receiving platform 1004. There are two groups of auxiliary rods 1003 symmetrically fixed to the bottom of the receiving platform 1004 relative to the piston rod of the blanking cylinder 1001, and their bottom ends penetrate and slide on the support frame 1002. A guiding plate 1005 is installed on the upper end surface of the support frame 1002 directly below the receiving platform 1004;

[0042] The sensor 4 is fixedly installed on one side of the first conveyor 2 through the baffle 3.

[0043] Using this device, it can effectively achieve full-automatic airtightness detection for the connecting pipes, and the double stations can speed up the detection of the connecting pipes. For the connecting pipes after the detection, according to their detection results, the connecting pipes with good airtightness and those with poor airtightness can be placed separately, greatly improving the detection efficiency of the connecting pipes.

[0044] Refer to Figure 1-3 , in this embodiment, the bracket 5 is arranged in a "冂"-shaped structure. One group of brackets 5 is arranged above the first conveyor 2, which can enable the clamping mechanism 7 to operate normally above the connecting pipe and perform clamping.

[0045] Support plates extending from the workbench 1 are fixed on both sides of the first conveyor 2, and the bracket 5 is vertically fixed on the support plate. The length of the support plate is greater than the maximum distance that the two clamping jaws 703 in the same clamping mechanism 7 are extended and expanded by the bidirectional cylinder 702, which can effectively avoid the insufficient distance of the bracket 5, which affects the normal operation of the clamping mechanism 7 and the clamping of the connecting pipe.

[0046] Reference Figure 1-4 In this embodiment, the upper end surface of the slide plate 801 and the upper end surface of the fixing platform 805 are on the same horizontal plane.

[0047] The skateboard 801 and the fixed platform 805 are both rectangular plates, and the skateboard 801 and the fixed platform 805 are both horizontally arranged. The second motor 803 is fixed at the central axis of the fixed platform 805. The second lead screw 804 is perpendicular to the skateboard 801 and the fixed platform 805. The skateboard 801 and the fixed platform 805 are both provided with protrusions so that the second lead screw 804 can rotate in the protrusions. The second lead screw 804 is fixed to the output end of the second motor 803, which can smoothly drive the second lead screw 804 to rotate on the protrusion. When the second lead screw 804 rotates, it can drive the skateboard 801 to slide along the slide rail 802, thereby adjusting the distance between the skateboard 801 and the fixed platform 805.

[0048] The vertical section of the connecting block 604 is an L-shaped structure, and the two groups of connecting blocks 604 are arranged opposite to each other at the protruding sides of the bottom ends. The upper end of the longer end of the connecting block 604 is slidingly connected to the slide rod 603, and the lower end is rotationally connected to the first screw 602.

[0049] Reference Figure 1-4 In the present embodiment, a material discharge trough 12 is provided on one side of the material discharge mechanism 10 on the workbench 1 , and a collecting box 13 having a larger diameter than the material discharge trough 12 is provided below the material discharge trough 12 .

[0050] When there is a problem with the air tightness of the connecting pipe, the group of clamping mechanisms 7 are driven by the group of horizontal moving mechanisms 6 to move to the top of the feeding chute 12, and the connecting pipe is placed in the collection box 13 below the feeding chute 12 for collection, and the detection of the connecting pipe is fully automated.

[0051] Reference Figure 2 and Figure 5 In this embodiment, the upper end of the material receiving platform 1004 is provided with four groups of material receiving claws evenly spaced apart, and the receiving plates 1005 are provided in four groups. The four groups of material receiving claws and the four groups of brackets 5 are staggeredly distributed, so that the material receiving platform 1004 can move to the interval between the receiving plates 1005 when moving downward.

[0052] After the measurement is completed, another set of horizontal moving mechanisms 6 can be driven to drive another set of clamping mechanisms 7 to clamp the connecting pipe. When the air tightness of the connecting pipe is good, the set of clamping mechanisms 7 can be driven by the set of horizontal moving mechanisms 6 to transport it to the material receiving platform 1004, and the connecting pipe can be placed on the material receiving platform 1004, and then the unloading cylinder 1001 can be driven to contract, and the material receiving platform 1004 can be driven downward by its piston rod, and the connecting pipe can be guided to the second conveyor 11 through the guide plate 1005.

[0053] Reference Figure 2 and Figure 5 In this embodiment, the receiving plate 1005 is an acute-angled triangular plate, one side of which extends above the conveyor belt of the second conveyor 11.

[0054] When the receiving platform 1004 descends to the receiving plate 1005 , the connecting pipe will be lifted by the receiving plate 1005 and rolled along the slope of the receiving plate 1005 to the second conveyor 11 , and then transported by the second conveyor 11 to the next process for storage.

[0055] Reference Figure 1-4 In this embodiment, the vertical center axes of the two sets of clamping mechanisms 7 are on the same vertical section.

[0056] The two sets of clamping mechanisms are allowed to clamp the connecting pipes at the same position to avoid clamping dislocation when the 7 pairs of connecting pipes are clamped after the adjusting mechanism 8 is adjusted.

[0057] Working principle: the device is connected to the previous process through the first conveyor 2, so that the connecting pipe can fall into the device for processing. When using the device, the external power supply is turned on. When the connecting pipe is placed in the first conveyor 2, it will be transported to the position of the baffle 3 through the first conveyor 2. The sensor 4 on the baffle 3 will sense the connecting pipe. At this time, a group of clamping mechanisms 7 close to the first conveyor 2 can be driven to clamp the connecting pipe on the first conveyor 2. During the clamping operation, a group of horizontal moving mechanisms 6 corresponding to the group of clamping mechanisms 7 are started first, and the first lead screw 602 is driven to rotate by the first motor 601, thereby driving the connecting block 604 to slide along the slide rod 603, so that the connecting block 604 drives the group of clamping mechanisms 7 to be transported to the top of the connecting pipe. At this time, the two-way cylinder 702 is started to expand the distance between the two groups of clamps 703, and the single The cylinder 701 moves toward the bellows. After the clamping jaws 703 reach both sides of the bellows, the bidirectional cylinder 702 is driven to contract again to clamp the connecting pipe through the two groups of clamping jaws 703. The first motor 601 of this group is operated in reverse to make the first lead screw 602 rotate in reverse, thereby driving the clamping mechanism 7 to move directly above the two groups of detection mechanisms 9 that are relatively arranged through the connecting block 604. After moving to the appropriate position, the clamping mechanism 7 can be operated again according to the steps of the above-mentioned operation of the clamping mechanism 7. The connecting pipe is placed between the two groups of detection mechanisms 9 through the clamping mechanism 7, and the positioning cylinder 901 is started to push the positioning plate 902 to buckle the two ends of the connecting pipe, so that the two ends of the connecting pipe are sealed, and the gas transmitted by the external air pump is connected to the connecting pipe through the air inlet 903 and delivered to the connecting pipe through the air outlet 904, and the air tightness of the connecting pipe is tested.

[0058] Since there are two groups of detection mechanisms 9 arranged relatively to each other, the above steps can be repeated. After the sensor 4 detects the connection tube conveyed by the first conveyor 2, the connection tube on the first conveyor 2 is clamped by a group of clamping mechanisms 7 close to the first conveyor 2, and is placed between another group of detection mechanisms 9 arranged relatively to each other. The connection tube is clamped by the detection mechanisms 9 to seal the two ends of the connection tube, and the gas transmitted by the external air pump is conveyed to the connection tube through the air inlet 903 and the air outlet 904, and the air tightness of the connection tube is detected.

[0059] After the inspection is completed, another set of horizontal moving mechanisms 6 can be driven to drive another set of clamping mechanisms 7 to clamp the connecting pipe. If the air tightness of the connecting pipe is good, the horizontal moving mechanism 6 can drive the clamping mechanism 7 to be transported to the material receiving platform 1004, and the connecting pipe can be placed on the material receiving platform 1004. Then, the unloading cylinder 1001 is driven to contract, and the material receiving platform 1004 is driven to move downward through its piston rod. Because the material receiving platform 1004 and the receiving plate 1005 are staggered, when the material receiving platform 1004 descends to the receiving plate 1005, the connecting pipe will be lifted by the receiving plate 1005, and rolled along the slope of the receiving plate 1005 to the second conveyor 11, and then transported by the second conveyor 11 to the next procedure for storage;

[0060] If there is a problem with the air tightness of the connecting pipe, the group of clamping mechanisms 7 are driven by the group of horizontal moving mechanisms 6 to move to the top of the feeding trough 12, and the connecting pipe is placed in the collection box 13 below the feeding trough 12 for collection;

[0061] Because the lengths of the connecting pipes may vary, if the connecting pipe is shorter and the extension length of the positioning cylinder 901 is limited, the second motor 803 may be driven to drive the second lead screw 804 to rotate, thereby causing the slide plate 801 to approach the fixed platform 805 along the slide rail 802, thereby shortening the distance between the two relatively arranged sets of detection mechanisms 9, so that the positioning cylinder 901 can push the positioning plate 902 to clamp and seal the two ends of the connecting pipe.

[0062] The above-mentioned embodiments only express several implementation methods of the present invention, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the invention patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A double-station air tightness detection device for a connecting pipe of an automobile exhaust duct, comprising a workbench (1), a first conveyor (2) arranged on one side of the workbench (1), a sensor (4) arranged on one side of the first conveyor (2), a second conveyor (11) arranged below the workbench (1), and a horizontal moving mechanism (6), a clamping mechanism (7), an adjusting mechanism (8), a detecting mechanism (9) and a feeding mechanism (10) arranged on the workbench (1), characterized in that: The horizontal moving mechanism (6) is composed of two groups, each of which is installed on two groups of brackets (5) vertically arranged on the workbench (1). The horizontal moving mechanism (6) comprises a first motor (601), a first lead screw (602), a slide bar (603) and a connecting block (604). The first motor (601) is installed on one side of one group of the brackets (5). The first lead screw (602) is rotatably installed between the two groups of the brackets (5). One end of the first lead screw (602) is fixedly connected to the output end of the first motor (601). The sliding rod (603) is fixedly installed between the two groups of the brackets (5) and is located above the first lead screw (602). The connecting block (604) is installed on the sliding rod (603) and the first lead screw (602). The connecting block (604) slides on the sliding rod (603). The connecting block (604) is rotatably connected to the first lead screw (602). The first motor (601) is driven through the first lead screw (602) to drive the connecting block (604) to move laterally along the sliding rod (603). The clamping mechanism (7) is installed on the horizontal moving mechanism (6), and comprises a one-way cylinder (701), a two-way cylinder (702) and a clamping claw (703); the one-way cylinder (701) is installed at the bottom of the connecting block (604); the two-way cylinder (702) is installed at the output end of the one-way cylinder (701); and the clamping claw (703) is symmetrically installed in two groups at the two output ends of the two-way cylinder (702); The adjusting mechanism (8) is installed on the workbench (1), and comprises a slide plate (801), a slide rail (802), a second motor (803), a second lead screw (804) and a fixed platform (805); the slide rail (802) is fixedly installed on the workbench (1) in two groups; the slide plate (801) slides on the slide rail (802); the fixed platform (805) is fixedly installed on the workbench (1); the second motor (803) is installed on the fixed platform (805) and is rotationally connected to the slide plate (801) through the second lead screw (804); driving the second motor (803) can drive the slide plate (801) to slide along the slide rail (802) through the second lead screw (804); The detection mechanism (9) is composed of two groups, which are respectively installed on the slide plate (801) and the fixed platform (805) in pairs, and include a positioning cylinder (901), a positioning plate (902), an air inlet (903), and an air outlet (904). The positioning plate (902) is fixedly installed on the positioning cylinder (901), the air inlet (903) is installed at the upper end of the positioning plate (902), and the air outlet (904) is opened in the middle of the opposite surfaces of the two groups of positioning plates (902) and is connected to the air inlet (903); The blanking mechanism (10) is installed on one side end of the second conveyor (11) and extends above the workbench (1), and includes a blanking cylinder (1001), a support frame (1002), an auxiliary rod (1003), a receiving platform (1004) and a guiding plate (1005). The support frame (1002) is installed on one side end of the second conveyor (11). The blanking cylinder (1001) passes through the support frame (1002) through a piston rod, and its top end is fixedly connected to the receiving platform (1004). The auxiliary rod (1003) is symmetrically installed at the bottom of the receiving platform (1004) in two groups relative to the piston rod of the blanking cylinder (1001), and its bottom end passes through and slides on the support frame (1002). A guiding plate (1005) located directly below the receiving platform (1004) is installed on the upper end surface of the support frame (1002); The sensor (4) is fixedly installed on one side of the first conveyor (2) through a baffle (3).

2. The double-station air tightness detection device for automobile exhaust duct connecting pipe according to claim 1 is characterized in that: The bracket (5) is arranged in a "冂" - shaped structure. One group of the brackets (5) is arranged above the first conveyor (2), enabling the clamping mechanism (7) to normally move above the connecting pipe and perform clamping.

3. The double-station air tightness detection device for automobile exhaust duct connecting pipe according to claim 2 is characterized in that: The upper end surface of the sliding plate (801) is on the same horizontal plane as the upper end surface of the fixed table (805).

4. The double-station air tightness detection device for automobile exhaust duct connecting pipe according to claim 3 is characterized in that: The vertical cross - section of the connecting block (604) is arranged in an L - shaped structure, and the protruding sides of the two groups of connecting blocks (604) are arranged oppositely at the bottom.

5. The double-station air tightness detection device for automobile exhaust duct connecting pipe according to claim 2 is characterized in that: A blanking groove (12) is opened on the workbench (1) on one side of the blanking mechanism (10), and a collection box (13) with a diameter larger than that of the blanking groove (12) is arranged below the blanking groove (12).

6. The double-station air tightness detection device for automobile exhaust duct connecting pipe according to claim 4 is characterized in that: The upper end of the receiving platform (1004) is provided with four receiving claws arranged at equal intervals. The guiding plates (1005) are provided in four groups. The four receiving claws and the four brackets (5) are交错分布 (staggered), enabling the receiving platform (1004) to move to the interval of the guiding plates (1005) when moving downward.

7. The double-station air tightness detection device for automobile exhaust duct connecting pipe according to claim 6 is characterized in that: The guiding plate (1005) is an acute - angled triangular plate, and one of its sides extends above the conveyor belt of the second conveyor (11).

8. The double-station air tightness detection device for automobile exhaust duct connecting pipe according to claim 4 is characterized in that: The vertical central axes of the two groups of clamping mechanisms (7) are in the same vertical cross - section.

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