Exhaust pipe testing fixture

Abstract

The utility model provides an exhaust pipe testing fixture, which comprises a bottom plate, two port detection devices arranged on the bottom plate and used for detecting ports of pipe fittings, a plurality of detection bases arranged between the port detection devices, detection grooves arranged on the detection bases, upper ends of the detection grooves being open, and upper ends of the detection grooves being provided with correlation type sensors. The detection automation degree is high, and the detection efficiency is greatly improved; and the length, the port roundness and the three-dimensional bending form of the pipe fitting can be detected at the same time through one-time detection operation, and the detection integrity is high.

Description

Technical Field

[0001] The utility model relates to the technical field of inspection tools, in particular to an exhaust pipe inspection tool. Background Art

[0002] When exhaust pipes are produced, a straight pipe blank is bent multiple times by a pipe bender to achieve the required three-dimensional bending shape. When existing exhaust pipes are inspected for quality, it is usually necessary to inspect the overall length of the exhaust pipe, the roundness of the port, and the bending shape of the exhaust pipe to see if they are qualified. Traditional inspection methods are cumbersome to operate and have low inspection efficiency. Summary of the invention

[0003] The utility model aims to solve the deficiencies in the prior art and provide an exhaust pipe inspection tool.

[0004] The purpose of the utility model is achieved through the following technical solutions: an exhaust pipe inspection fixture, including a bottom plate, two port detection devices for detecting pipe ports are arranged on the bottom plate, a plurality of detection bases are arranged between the port detection devices, and a detection groove is arranged on the detection base, the upper end of the detection groove is open, and a through-beam sensor is arranged on the upper end of the detection groove.

[0005] Preferably, a bottom positioning block is provided at the bottom of the detection slot, and side positioning blocks are provided on both sides of the detection slot.

[0006] Preferably, the through-beam sensor is a laser through-beam sensor or an infrared through-beam sensor.

[0007] Preferably, photoelectric switches are provided on the detection bases at both ends.

[0008] Preferably, the port detection device comprises a bracket fixedly mounted on a base plate, a telescopic drive member is provided on the bracket, a go / no-go gauge for detecting the roundness of the pipe port is connected to the telescopic drive member, and three sets of micro switches are provided between the go / no-go gauge and the telescopic drive member.

[0009] Preferably, the telescopic driving member is a cylinder.

[0010] Preferably, the base plate is mounted on a fixed platform, and a detachable mounting mechanism is provided between the base plate and the fixed platform.

[0011] Preferably, the detachable mounting mechanism includes a first positioning pin hole arranged on the base plate, a second positioning pin hole arranged on the fixed platform and corresponding to the first positioning pin hole, a positioning pin, and a locking screw. The positioning pin is inserted into the first positioning pin hole and the second positioning pin hole, and the base plate is fastened to the fixed platform by the locking screw.

[0012] Preferably, a hanging ring is provided on the bottom plate.

[0013] The beneficial effects of the utility model are:

[0014] 1. The detection is highly automated, and the detection efficiency is greatly improved;

[0015] 2. One inspection operation can simultaneously inspect the length, port roundness and three-dimensional bending shape of the pipe fittings, with high inspection integrity. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the utility model.

[0017] Figure 2 for Figure 1 Enlarged view of part A in the middle.

[0018] Figure 3 It is a top view of the utility model.

[0019] Figure 4 for Figure 3 Enlarged view of part B in the middle.

[0020] In the figure: 1. fixed platform, 2. bottom plate, 3. bracket, 4. telescopic drive part, 5. go / no-go gauge, 6. detection base, 7. pipe fitting, 8. lifting ring, 9. first positioning pin hole, 10. bottom positioning block, 11. side positioning block, 12. through-beam sensor, 13. locking screw, 15. photoelectric switch, 16. micro switch. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the utility model.

[0022] like Figures 1 to 4 As shown, an exhaust pipe inspection fixture includes a base plate 2 and a control device. The base plate 2 is provided with two port inspection devices for inspecting the ports of the pipe 7. A plurality of inspection bases 6 are provided between the port inspection devices. The inspection base 6 is provided with an inspection groove. The upper end of the inspection groove is open. The upper end of the inspection groove is provided with a through-beam sensor 12.

[0023] The control device adopts a PLC programmable controller. The detection groove is a U-shaped groove. A bottom positioning block 10 is provided at the bottom of the detection groove, and side positioning blocks 11 are provided on both sides of the detection groove. When the pipe fitting 7 is tested, it will be put into each detection groove at the same time, and the pipe fitting 7 will be positioned by the bottom positioning block 10 and the side positioning block 11.

[0024] The through-beam sensor 12 includes a transmitting module and a receiving module, and the transmitting module and the receiving module are respectively arranged on both sides of the upper end of the detection slot. In this embodiment, the through-beam sensor 12 is a laser through-beam sensor 12 or an infrared through-beam sensor 12. Photoelectric switches 15 are arranged on the detection bases 6 at both ends. The through-beam sensor 12 is electrically connected to the control device.

[0025] The port detection device includes a bracket 3 fixedly arranged on the bottom plate, a telescopic driving member 4 is arranged on the bracket 3, a go / no-go gauge 5 for detecting the roundness of the port of the pipe 7 is connected to the telescopic driving member 4, and three groups of micro switches 16 are arranged between the go / no-go gauge 5 and the telescopic driving member 4. The three groups of micro switches 16 are arranged in a circular array between the go / no-go gauge 5 and the telescopic driving member 4. The micro switches 16 are electrically connected to the control device.

[0026] When the pipe fitting 7 is placed in place on the exhaust pipe inspection fixture, the port of the pipe fitting 7 faces the go / no-go gauge 5, and the go / no-go gauge 5 is driven to extend by the telescopic driving member 4, and the go / no-go gauge 5 is used to detect whether the roundness of the port of the pipe fitting 7 is qualified. If the go / no-go gauge 5 can be inserted into the port of the pipe fitting 7, the roundness of the port of the surface pipe fitting 7 is qualified. If it cannot be inserted into the port, the port of the surface pipe fitting 7 is unqualified. When performing port detection, the extended length of the go / no-go gauge 5 is fixed. If the length between the two ends of the pipe fitting 7 is qualified, the three groups of micro switches 16 can be triggered after the go / no-go gauge 5 is inserted into the port of the pipe fitting 7; if the length of the pipe fitting is short, at least one of the three groups of micro switches 16 cannot be triggered, and the product is judged to be unqualified.

[0027] In this embodiment, the telescopic driving member 4 is a cylinder, the cylinder body of which is fixed on the bracket 3, and the go / no-go gauge 5 is installed on the piston rod of the cylinder.

[0028] The base plate is installed on the fixed platform 1, and a detachable mounting mechanism is provided between the base plate and the fixed platform 1. Specifically, the detachable mounting mechanism includes a first positioning pin hole 9 provided on the base plate, a second positioning pin hole provided on the fixed platform 1 and corresponding to the first positioning pin hole 9, a positioning pin, and a locking screw 13. The positioning pin is inserted into the first positioning pin hole 9 and the second positioning pin hole, and the base plate 2 is fastened to the fixed platform 1 by the locking screw 13. A lifting ring 8 is provided on the base plate. The base plate is connected to the fixed platform 1 through the detachable mounting mechanism, which facilitates the installation and disassembly of the inspection fixture.

[0029] When the utility model detects the pipe fitting 7, the specific method is as follows:

[0030] Step 1: Put the pipe 7 to be tested on the exhaust pipe inspection fixture manually or mechanically, and put the pipe 7 into each inspection slot at the same time. The photoelectric switches 15 at both ends are used for detection. If the pipe 7 is not detected, it means that the pipe 7 cannot be placed in the exhaust pipe inspection fixture intact, and the pipe 7 is directly judged to be unqualified; if the existence of the pipe 7 is detected, the pipe 7 is judged to be qualified.

[0031] Step 2. After the photoelectric switch 15 detects that the pipe 7 is in place, the control device controls the telescopic drive member 4 to drive the go / no-go gauge 5 to extend, and determines whether the go / no-go gauge 5 can be normally inserted into the port of the pipe 7. If it cannot be normally inserted into the port of the pipe 7, it is determined that the roundness of the port of the pipe 7 is unqualified; and when performing port detection, if all three groups of micro switches 16 can be triggered, it indicates that the length of the pipe 7 is qualified; otherwise, it is determined that the length of the pipe 7 is unqualified.

[0032] In addition, by setting up three groups of micro switches, it is also possible to detect whether the end face of the pipe fitting is perpendicular to the central axis of the pipe fitting. If the verticality of the end face of the pipe fitting is qualified, all three groups of micro switches will be triggered; if the verticality of the end face of the pipe fitting is unqualified, at least one group of micro switches will not be triggered.

[0033] After step three and step two are tested, the pipe 7 is tested by the through-beam sensor 12 installed on the test base 6. If all the through-beam sensors 12 do not detect the existence of the pipe 7, it means that all parts of the pipe 7 can be placed in the test groove intact, and the three-dimensional bending shape of the pipe 7 is qualified; otherwise, the three-dimensional bending shape of the pipe 7 is judged to be unqualified.

[0034] Only when all the tests in step 1 to step 3 are qualified, the pipe fitting 7 is finally judged to be qualified; if any one of them is unqualified, the pipe fitting 7 is finally judged to be unqualified.

[0035] The utility model has the following advantages:

[0036] 1. The detection is highly automated, and the detection efficiency is greatly improved;

[0037] 2. In one inspection operation, the length, port roundness and three-dimensional bending shape of the pipe fitting 7 can be inspected simultaneously, and the inspection integrity is high.

[0038] 3. The bottom plate is connected to the fixed platform 1 through a detachable mounting mechanism, which facilitates the installation and replacement of the inspection fixture.

[0039] The present utility model is not limited to the above-mentioned optimal implementation mode. Anyone can derive other various forms of products under the inspiration of the present utility model. However, no matter what changes are made in the shape or structure, all those having the same or similar technical solutions as the present application fall within the protection scope of the present utility model.

Claims

1. An exhaust pipe inspection fixture, characterized in that: It comprises a bottom plate, on which are arranged two port detection devices for detecting the ports of pipe fittings, between which are arranged several detection bases, on which are arranged detection grooves, the upper ends of which are open, and on which are arranged corresponding radiation sensors.

2. An exhaust pipe inspection fixture according to claim 1, characterized in that: A bottom positioning block is provided at the bottom of the detection slot, and side positioning blocks are respectively provided on both sides of the detection slot.

3. The exhaust pipe inspection fixture according to claim 1, characterized in that: The through-beam sensor is a laser through-beam sensor or an infrared through-beam sensor.

4. The exhaust pipe inspection fixture according to claim 1, characterized in that: Photoelectric switches are provided on the detection bases at both ends.

5. The exhaust pipe inspection fixture according to claim 1, characterized in that: The port detection device includes a bracket fixedly arranged on a bottom plate, a telescopic driving member is arranged on the bracket, a go / no-go gauge for detecting the roundness of the pipe port is connected to the telescopic driving member, and three groups of micro switches are arranged between the go / no-go gauge and the telescopic driving member.

6. An exhaust pipe inspection fixture according to claim 5, characterized in that: The telescopic driving member is a cylinder.

7. An exhaust pipe inspection fixture according to any one of claims 1 to 6, characterized in that: The bottom plate is installed on the fixed platform, and a detachable installation mechanism is provided between the bottom plate and the fixed platform.

8. An exhaust pipe inspection fixture according to claim 7, characterized in that: The detachable mounting mechanism includes a first positioning pin hole arranged on the base plate, a second positioning pin hole arranged on the fixed platform and corresponding to the first positioning pin hole, a positioning pin, and a locking screw. The positioning pin is inserted into the first positioning pin hole and the second positioning pin hole, and the base plate is fastened to the fixed platform by the locking screw.

9. The exhaust pipe inspection fixture according to claim 7, characterized in that: A hanging ring is arranged on the bottom plate.

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