Diesel engine exhaust gas recirculation exhaust pipe position and aperture detection device and method

Abstract

The present invention relates to a diesel engine exhaust gas circulation exhaust pipe position and aperture detection device, comprising a base and a reference base located on the base, the left and right sides of the reference base are symmetrically provided with probes of an electric measuring instrument, the probes are driven by an electric mechanism to perform forward, backward, left, right, up and down movement adjustment, and the upper surface of the reference base is provided with at least two positioning pins for inserting into two reference holes on the bottom flange of the exhaust pipe. The diesel engine exhaust gas circulation exhaust pipe position and aperture detection device has a simple structure, can detect the position and aperture of the diesel engine exhaust gas circulation exhaust pipe, has high detection efficiency, and is convenient and fast.

Description

Technical Field

[0001] The invention relates to a device and a method for detecting the position and aperture of an exhaust gas circulation exhaust pipe of a diesel engine. Background Art

[0002] The exhaust gas recirculation pipe of a diesel engine has a complex shape, with many holes and inspection surfaces, and traditional manual inspection is inefficient. Summary of the invention

[0003] In view of the deficiencies in the prior art, the technical problem to be solved by the present invention is to provide a diesel engine exhaust gas recirculation exhaust pipe position and aperture detection device and method.

[0004] In order to solve the above technical problems, the technical solution of the present invention is: a diesel engine exhaust gas circulation exhaust pipe position and aperture detection equipment, including a base and a reference seat located on the base, the left and right sides of the reference seat are symmetrically provided with probes of an electric measuring instrument, the probes are driven by an electric mechanism to perform forward, backward, left, right, up and down movement adjustment, and the upper surface of the reference seat is provided with at least two locating pins for inserting into the two reference holes on the bottom end flange of the exhaust pipe.

[0005] Preferably, the electric mechanisms include a lifting plate, a left and right moving plate is provided above the lifting plate, a front and rear moving plate is provided above the left and right moving plates, the left and right moving plates are connected to the lifting plate via a slider and left and right extended slide rails, the front and rear moving plates are connected to the left and right moving plates via a slider and front and rear extended slide rails, the lifting plates are driven to rise and fall by the first ball screw pair, the left and right moving plates are driven to move left and right by the second ball screw pair, the front and rear moving plates are driven to move front and back by the third ball screw pair, and the probes are installed on the end sides of the front and rear moving plates close to the reference seats.

[0006] Preferably, a sensor for detecting the flatness of the bottom surface of the flange at the bottom end of the exhaust pipe is provided on the upper surface of the reference seat.

[0007] Preferably, the number of sensors is five, and the upper surface of the reference seat is provided with mounting holes for the sensors.

[0008] Preferably, the upper surface of the reference seat is provided with a detection hole corresponding to the vertical air hole on the bottom end flange of the exhaust pipe, and a fixed detection head and a movable detection head are provided inside the detection hole. The fixed detection head is aligned upward with the bottom surface of the step ring inside the detection hole, and the movable detection head is aligned downward with the top surface of the step ring inside the detection hole.

[0009] Preferably, the movable detection head is installed on a "J"-shaped pendulum rod, the hook end of the pendulum rod faces upward and is connected to the movable detection head, the middle part of the pendulum rod is hinged on the detection through hole, the bottom end of the pendulum rod is hinged to the piston rod of the cylinder, and the end of the cylinder body of the cylinder is hinged on the detection through hole to control the swing of the pendulum rod along its central hinge point.

[0010] A detection method for a position and aperture detection device of an exhaust gas circulation exhaust pipe of a diesel engine is carried out according to the following steps: the bottom end flange of the exhaust pipe workpiece is placed into a reference seat with the flange facing downward, and a positioning pin is inserted into a reference hole for positioning; a sensor on the upper surface of the reference seat detects the flatness of the bottom surface of the flange; the electric measuring instrument probes on the left and right sides of the reference seat are respectively adjusted to move forward, backward, left, right, up and down, respectively measure and calculate the inner diameter of the through hole at four quadrant points inside the through holes on the left and right sides of the exhaust pipe, and since the through holes on the left and right sides of the exhaust pipe are interconnected, the probes are respectively moved to the middle of the hole position after the aperture detection is completed, so as to detect the coaxiality of the through holes on the left and right sides; the fixed detection head is directed upward to the bottom surface of the step ring inside the detection through hole to measure its height, and the movable detection head is directed downward to the top surface of the step ring inside the detection through hole to measure its height, which can be used to calculate whether the distance between the bottom surface and the top surface of the step ring meets the tolerance requirements.

[0011] Preferably, when the exhaust pipe workpiece is taken or placed, the top end of the swing rod is driven by the cylinder to swing toward the axis side away from the step ring to avoid interference.

[0012] Compared with the prior art, the present invention has the following beneficial effects: the diesel engine exhaust gas circulation exhaust pipe position and aperture detection equipment has a simple structure, can quickly detect the diesel engine exhaust gas circulation exhaust pipe position and aperture, has high detection efficiency, and is convenient and fast.

[0013] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 FIG. 4 is a top view of an embodiment of the present invention.

[0015] Figure 2 This is a side view of the probe electric mechanism on one side of the reference base.

[0016] Figure 3 Schematic diagram of a fixed detection head and a movable detection head.

[0017] Figure 4 Schematic diagram of the workpiece structure. DETAILED DESCRIPTION

[0018] In order to make the above features and advantages of the present invention more clearly understood, embodiments are given below with reference to the accompanying drawings for detailed description.

[0019] like Figures 1 to 4As shown, a diesel engine exhaust gas recirculation exhaust pipe position and aperture detection equipment includes a base 1 and a reference base 2 located on the base, and the left and right sides of the reference base are symmetrically provided with probes 3 of an electric measuring instrument, and the probes are driven by an electric mechanism to adjust forward, backward, left, right, up and down movements, and at least two positioning pins 4 are provided on the upper surface of the reference base for inserting into two reference holes 6 on the bottom flange of the exhaust pipe 5. The probe of the electric measuring instrument and the detection principle belong to the prior art.

[0020] In the embodiment of the present invention, the electric mechanism includes a lifting plate 7, a left and right moving plate 8 is provided above the lifting plate, a front and rear moving plate 9 is provided above the left and right moving plates, the left and right moving plates are connected to the lifting plate via a slider 10 and a left and right extending slide rail 11, the front and rear moving plates are connected to the left and right moving plates via a slider and a front and rear extending slide rail, the lifting plates are driven to lift and lower by a first ball screw pair, the left and right moving plates are driven to move left and right by a second ball screw pair, the front and rear moving plates are driven to move forward and backward by a third ball screw pair, and the probes are installed on the end sides of the front and rear moving plates close to the reference seat; the ball screw pair belongs to the prior art and is not shown in the figure.

[0021] In the embodiment of the present invention, a sensor 12 for detecting the flatness of the bottom surface of the flange at the bottom end of the exhaust pipe is disposed on the upper surface of the reference seat.

[0022] In the embodiment of the present invention, the number of sensors is five, and the upper surface of the reference seat is provided with installation holes for the sensors.

[0023] In the embodiment of the present invention, the upper surface of the reference seat is provided with a detection hole 14 corresponding to the vertical air hole 13 on the bottom end flange of the exhaust pipe, and a fixed detection head 15 and a movable detection head 16 are provided inside the detection hole. The fixed detection head is upwardly aligned with the bottom surface 17 of the step ring inside the detection hole, and the movable detection head is downwardly aligned with the top surface 18 of the step ring inside the detection hole. The fixed detection head and the movable detection head can use distance sensors.

[0024] In the embodiment of the present invention, the movable detection head is installed on a "J"-shaped pendulum rod 19, the hook end of the pendulum rod faces upward and is connected to the movable detection head, the middle part of the pendulum rod is hinged on the detection through hole, the bottom end of the pendulum rod is hinged to the piston rod of the cylinder 20, and the cylinder body end of the cylinder is hinged on the detection through hole to control the swing of the pendulum rod along its central hinge point.

[0025] A detection method for position and aperture detection equipment of exhaust gas circulation exhaust pipe of diesel engine is carried out according to the following steps: the bottom end flange of exhaust pipe workpiece is placed into reference seat with flange facing downward, and the positioning pin is inserted into the reference hole for positioning; the sensor on the upper surface of the reference seat detects the flatness of the bottom surface of the flange; the electric measuring instrument probes on the left and right sides of the reference seat are respectively adjusted to move forward, backward, left, right, up and down, respectively measure and calculate the inner diameters D1 and D2 of the through holes at four quadrant points inside the through holes on the left and right sides of the exhaust pipe, and since the through holes on the left and right sides of the exhaust pipe are interconnected, the probes are respectively moved to the middle of the hole position after the aperture detection, so as to detect the coaxiality of the through holes on the left and right sides; the fixed detection head is upwardly aligned with the bottom surface of the step ring inside the detection through hole to measure its height, and the movable detection head is downwardly aligned with the top surface of the step ring inside the detection through hole to measure its height, which can be used to calculate whether the distance H between the bottom surface and the top surface of the step ring meets the tolerance requirements.

[0026] In the embodiment of the present invention, when the exhaust pipe workpiece is taken or placed, the top end of the swing rod is driven by the cylinder to swing toward the axis side away from the step ring to avoid interference.

[0027] The present invention is not limited to the above-mentioned best embodiment. Anyone can derive other forms of diesel engine exhaust gas recirculation exhaust pipe position and aperture detection equipment and methods under the enlightenment of the present invention. All equivalent changes and modifications made according to the scope of the patent application of the present invention shall fall within the scope of the present invention.

Claims

1. A diesel engine exhaust gas recirculation exhaust pipe position and aperture detection device, characterized in that: It includes a base and a reference base located on the base, and the left and right sides of the reference base are symmetrically provided with probes of an electric measuring instrument, and the probes are driven by an electric mechanism to move forward, backward, left, right, up and down for adjustment, and at least two positioning pins are provided on the upper surface of the reference base for inserting into two reference holes on the flange at the bottom end of the exhaust pipe; the electric mechanisms include a lifting plate, and a left and right movable plate is provided above the lifting plate, and a front and rear movable plate is provided above the left and right movable plates, and the left and right movable plates are connected to the lifting plate through a slider and a left and right extended slide rail, and the front and rear movable plates are connected to the left and right movable plates through a slider and a front and rear extended slide rail, and the lifting plate is driven to rise and fall by a first ball screw pair, and the left and right movable plates are driven to move left and right by a second ball screw pair, The front and rear moving plates are driven to move forward and backward by the third ball screw pair, and the probes are installed on the end sides of the front and rear moving plates close to the reference seat; the upper surface of the reference seat is provided with a detection through hole corresponding to the vertical air hole on the flange at the bottom end of the exhaust pipe, and a fixed detection head and a movable detection head are provided inside the detection through hole, the fixed detection head is upwardly aligned with the bottom surface of the step ring inside the detection through hole, and the movable detection head is downwardly aligned with the top surface of the step ring inside the detection through hole; the movable detection head is installed on a "J"-shaped swing rod, the hook end of the swing rod is upward and connected to the movable detection head, the middle part of the swing rod is hinged on the detection through hole, the bottom end of the swing rod is hinged to the piston rod of the cylinder, and the end of the cylinder body of the cylinder is hinged to the detection through hole, so as to control the swing of the swing rod along its central hinge point.

2. The diesel engine exhaust gas recirculation exhaust pipe position and aperture detection device according to claim 1, characterized in that: The upper surface of the reference seat is provided with a sensor for detecting the flatness of the bottom surface of the flange at the bottom end of the exhaust pipe.

3. The diesel engine exhaust gas recirculation exhaust pipe position and aperture detection device according to claim 2, characterized in that: The number of sensors is five, and the upper surface of the reference seat is provided with installation holes for the sensors.

4. A method for detecting the position and aperture detection device of the exhaust gas recirculation pipe of a diesel engine as claimed in any one of claims 1 to 3, characterized in that: Proceed in the following steps: put the bottom end flange of the exhaust pipe workpiece into the reference seat with the flange facing downward, and insert the positioning pin into the reference hole for positioning; the sensor on the upper surface of the reference seat detects the flatness of the bottom surface of the flange; the electric measuring instrument probes on the left and right sides of the reference seat are adjusted to move forward, backward, left, right, up and down respectively, and measure and calculate the inner diameter of the through holes at four quadrant points inside the through holes on the left and right sides of the exhaust pipe respectively. Since the through holes on the left and right sides of the exhaust pipe are interconnected, the probes are moved to the middle of the hole position after the hole diameter is detected, so as to detect the coaxiality of the through holes on the left and right sides; the fixed detection head is aimed upward at the bottom surface of the step ring inside the detection through hole to measure its height, and the movable detection head is aimed downward at the top surface of the step ring inside the detection through hole to measure its height, which can be used to calculate whether the distance between the bottom surface and the top surface of the step ring meets the tolerance requirements.

5. The detection method of the diesel engine exhaust gas recirculation exhaust pipe position and aperture detection device according to claim 4, characterized in that: When the exhaust pipe workpiece is taken or placed, the top end of the swing rod is driven by the cylinder to swing toward the axis side away from the step ring to avoid interference.

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