Large ring forging inner wall flaw detection device and method

Abstract

The present invention discloses a device and method for detecting the inner wall of a large ring forging, and belongs to the technical field of metal flaw detection. The device and method for detecting the inner wall of a large ring forging include a bracket and an ultrasonic detector, and also include: a driving mechanism for driving the bracket to move along the circumferential direction of the ring forging on the side wall of the ring forging; a piston cylinder, the inner cavity of the cylinder body is connected to a coupling agent supply device, and the piston of the piston cylinder is connected to the probe of the ultrasonic detector; a contact block, which is provided with an arc-shaped convex surface, the arc-shaped convex surface on the contact block is in contact with the inner wall of the ring forging, the contact block is used to transmit ultrasonic waves, and a liquid spray port is provided on the arc-shaped convex surface; a stop valve, when the arc-shaped convex surface on the contact block abuts against the inner wall of the ring forging, the stop valve opens. The device and method for detecting the inner wall of a large ring forging of the present invention can reduce the distance that ultrasonic waves are transmitted in the air, thereby reducing the attenuation of ultrasonic signals, improving the detection accuracy of the probe, and thus improving the accuracy of flaw detection on the inner wall of the ring forging.

Description

Technical Field

[0001] The invention relates to the technical field of metal flaw detection, and in particular to a device and method for detecting the inner wall of a large ring forging. Background Art

[0002] Ultrasonic flaw detection is a method of inspecting part defects by utilizing the characteristic that ultrasound can penetrate deep into metal materials and reflect at the edge of the interface when entering from one section to another. The ultrasonic beam is transmitted from the surface of the part by the probe to the inside of the part. When the ultrasonic wave encounters the defect and the bottom of the part, reflected waves are generated respectively, forming pulse waveforms on the fluorescent screen. The defect location and size are judged based on these pulse waveforms.

[0003] The core components of the existing ring forging inner wall flaw detection device include a driving mechanism and an ultrasonic detector. The probe of the ultrasonic detector is attached to the inner wall of the ring forging, and the driving mechanism drives the probe of the ultrasonic detector to move along the inner wall of the ring forging, thereby using the ultrasonic detector to perform ultrasonic flaw detection on the inner wall of the ring forging.

[0004] When the flaw detection device is used to detect the inner wall of a large ring forging, the surface of the inner wall of the large ring forging after forging is not smooth because the forging process is rough processing, and the inner wall of the ring forging is a curved structure, which makes it difficult for the probe of the ultrasonic detector to fully fit with the inner wall of the ring forging at all times when it moves along the inner wall of the ring forging. This causes the ultrasonic probe to transmit ultrasonic waves or receive echoes. The ultrasonic signal will be transmitted in the gap between the probe and the inner wall of the ring forging, and the ultrasonic signal will be greatly attenuated when transmitted through the air in the gap. At this time, if the intensity of the transmitted ultrasonic signal and the recovered ultrasonic signal is increased by simply increasing the transmitting power of the ultrasonic probe, the clutter signal will increase, resulting in an increase in the signal-to-noise ratio, which will interfere with the accurate judgment of defects and further have an adverse effect on the flaw detection accuracy of the ultrasonic detector. Summary of the invention

[0005] The purpose of the present invention is to overcome the problems in the prior art and provide a large ring forging inner wall flaw detection device and method, which can reduce the attenuation of ultrasonic signals when flaw detection is performed on the inner wall of a large ring forging, thereby improving the accuracy of flaw detection on the inner wall of a large ring forging.

[0006] The present invention provides a large ring forging inner wall flaw detection device, comprising a bracket and an ultrasonic detector, wherein the probe of the ultrasonic detector is arranged on the bracket, and the ultrasonic detector is used to detect cracks and pores on the side wall of the ring forging, and further comprising:

[0007] A driving mechanism connected to the bracket, the driving mechanism is used to drive the bracket to move along the circumference of the ring forging on the side wall of the ring forging;

[0008] A piston cylinder, the cylinder body is connected to the bracket, the inner cavity of the cylinder body is connected to a coupling agent supply device, the piston of the piston cylinder is connected to the probe of the ultrasonic detector, and the piston is used to drive the probe to move along the radial direction of the ring forging;

[0009] A contact block is arranged on the probe, the contact block is provided with an arc-shaped convex surface, the arc-shaped convex surface on the contact block is in contact with the inner wall of the ring forging, the contact block is used to transmit ultrasonic waves, and a liquid spraying port is arranged on the arc-shaped convex surface;

[0010] One end of the stop valve is communicated with the liquid spraying port, and the other end of the stop valve is communicated with the inner cavity of the cylinder body. When the arc convex surface on the contact block abuts against the inner wall of the ring forging, the stop valve opens.

[0011] Preferably, the stop valve includes a valve core and a first spring, a sliding cavity is provided in the contact block, one end of the sliding cavity is communicated with the liquid spray port, and the other end of the sliding cavity is communicated with the inner cavity of the cylinder body, one end of the valve core is slidably connected to the sliding cavity, and the valve core is used to cut off the communication between the liquid spray port and the inner cavity of the cylinder body, the first spring is provided in the sliding cavity, the first spring abuts against the valve core, and under the action of the elastic force of the first spring, the other end of the valve core passes through the liquid spray port and protrudes from the arc-shaped convex surface, and a material passing hole is provided on the valve core, and the protruding end of the valve core can be pressed into the liquid spray port by the inner wall of the ring forging, so that the liquid spray port is communicated with the inner cavity of the cylinder body through the material passing hole.

[0012] Preferably, a connecting plate is provided between the piston and the probe, the connecting plate is provided with a sliding hole along the radial direction of the ring forging, the sliding hole is slidably connected with a sliding rod, the sliding rod is provided with a baffle, the baffle is arranged on one side of the contact block, the sliding rod is provided with a second spring, the second spring abuts against the baffle, under the action of the elastic force of the second spring, the baffle abuts against the inner wall of the ring forging, and the baffle is used to enclose the coupling agent sprayed out of the spray port.

[0013] Preferably, the driving mechanism includes a driving wheel and a clamping mechanism, the driving wheel is pivotally connected to the bracket, the driving wheel abuts against the inner wall of the ring forging, the driving wheel is connected to a power device, and the clamping mechanism is arranged on the bracket, the clamping mechanism abuts against the outer wall of the ring forging, and the clamping mechanism is used to clamp the side wall of the ring forging between the driving wheel and the clamping mechanism.

[0014] Preferably, the clamping mechanism includes a slider, a connecting shaft, a screw and a clamping wheel, the bracket is provided with a sliding groove along the radial direction of the ring forging, the slider is slidably connected in the sliding groove, the connecting shaft is connected to the slider, the clamping wheel is pivotally connected to the connecting shaft, the bracket is provided with a threaded hole, the screw is threadedly connected in the threaded hole, one end of the screw is pivotally connected to the slider, and rotating the screw can drive the slider to slide in the sliding groove, so as to drive the clamping wheel to press on the outer wall of the ring forging.

[0015] Preferably, a first connecting rod and a second connecting rod are provided between the connecting shaft and the pressure wheel, the first connecting rod and the second connecting rod are both pivotally connected to the connecting shaft, pressure wheels are provided on the first connecting rod and the second connecting rod, and coil springs are provided at the connection between the first connecting rod and the connecting shaft and at the connection between the second connecting rod and the connecting shaft, and the coil springs are used to apply an elastic force to the first connecting rod and the second connecting rod to move them closer to each other, so as to apply a pressure force to the outer wall of the ring forging through the pressure wheel on the first connecting rod and the pressure wheel on the second connecting rod.

[0016] Preferably, the bracket is connected to an axial electric slide rail, the length direction of the axial electric slide rail is parallel to the axial direction of the ring forging, and the axial electric slide rail is used to drive the cylinder body of the piston cylinder to move along the axial direction of the ring forging.

[0017] Preferably, a horizontal slide rail is provided on one side of the bracket, a horizontal slider is slidably connected in the horizontal slide rail, the bracket is fixedly connected to the horizontal slider, a vertical slide rail is provided on one side of the horizontal slide rail, a bottom plate is connected to the bottom end of the vertical slide rail, a ring forging is clamped on the bottom plate, a vertical slider is slidably connected in the vertical slide rail, and the vertical slider is connected to the horizontal slide rail.

[0018] Preferably, a positioning block is provided on the bottom plate, and the positioning block is used to position the ring forging on the bottom plate to ensure the position of the ring forging relative to the bracket.

[0019] The present invention also discloses a method for flaw detection using a large ring forging inner wall flaw detection device, comprising the following steps:

[0020] The ring forging is placed at a predetermined position, and then the controller driving mechanism drives the bracket to move along the axial direction of the ring forging on the side wall of the ring forging, and controls the action of the coupling agent supply device;

[0021] The coupling agent supply device supplies coupling agent into the inner cavity of the cylinder body. After the coupling agent enters the inner cavity of the cylinder body, the piston is driven to move out of the cylinder body, thereby driving the probe to move outward until the arc-shaped convex surface on the contact block fits with the inner wall of the ring forging;

[0022] Open the stop valve, and the coupling agent in the inner cavity of the cylinder body is sprayed out from the spray port on the arc-shaped convex surface through the stop valve, thereby wrapping the arc-shaped convex surface of the contact block and reducing the gap between the contact block and the inner wall of the ring forging;

[0023] The action of the ultrasonic detector is controlled, and the probe of the ultrasonic detector is used to generate ultrasonic waves. The ultrasonic waves are transmitted to the inner wall of the ring forging through the contact block. The ultrasonic waves reflected by the ring forging are transmitted back to the contact block and received by the probe. The echo is analyzed by the ultrasonic detector to complete the flaw detection of the inner wall of the ring forging.

[0024] Compared with the prior art, the beneficial effects of the present invention are as follows: a large ring forging inner wall flaw detection device of the present invention drives the bracket to move circumferentially on the side wall of the ring forging through a driving mechanism, and a coupling agent supplying device supplies coupling agent into the inner cavity of the cylinder body. After the coupling agent enters the inner cavity of the cylinder body, the piston is driven to move out of the cylinder body, thereby driving the probe to move outward until the arc-shaped convex surface on the contact block fits with the inner wall of the ring forging, and the driving mechanism drives the probe to detect different parts of the inner wall of the ring forging through the bracket. The coupling agent supplied by the coupling agent supplying device can not only drive the contact block on the probe to always fit with the inner wall of the ring forging, but also the coupling agent can be continuously sprayed out from the liquid spraying port on the contact block, thereby always reducing the air in the gap between the contact block and the inner wall of the ring forging, thereby reducing the distance that the ultrasonic wave is transmitted in the air, thereby reducing the attenuation of the ultrasonic wave signal, thereby improving the accuracy of flaw detection on the inner wall of the large ring forging.

[0025] The stop valve of the device can block the release of the coupling agent before the contact block contacts the ring forging, and release the coupling agent in time when the contact block contacts the ring forging, thereby avoiding the waste of coupling agent and ensuring the accuracy of the timing of coupling agent release, thereby ensuring the detection effect of the entire device. By setting a baffle, the coupling agent sprayed from the spray port is enclosed to prevent the coupling agent from leaking from one side of the contact block when the contact block slides relative to the inner wall of the ring forging, thereby ensuring the coupling agent wrapping the contact block, further reducing the gap between the contact block and the inner wall of the ring forging, and improving the detection accuracy of the probe. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the internal structure of the present invention;

[0027] Figure 2 It is a structural schematic diagram of the AA surface of the present invention;

[0028] Figure 3 It is a structural schematic diagram of the BB surface of the present invention;

[0029] Figure 4 It is a structural schematic diagram of the probe of the present invention;

[0030] Figure 5 It is a structural schematic diagram of the CC surface of the present invention;

[0031] Figure 6 It is a structural schematic diagram of the stop valve of the present invention.

[0032] Description of reference numerals:

[0033] 1. Ring forging, 101. Bracket, 102. Probe, 103. Driving mechanism, 104. Cylinder, 105. Piston, 106. Contact block, 107. Liquid spray port, 108. Stop valve, 201. Valve core, 202. First spring, 203. Sliding cavity, 204. Material hole, 301. Connecting plate, 302. Sliding rod, 303. Baffle, 304. Second spring, 401. Driving wheel, 4 02. Clamping mechanism, 403. Power device, 501. Slider, 502. Connecting shaft, 503. Screw, 504. Clamping wheel, 505. Slide groove, 601. First connecting rod, 602. Second connecting rod, 603. Coil spring, 7. Axial electric slide rail, 801. Horizontal slide rail, 802. Horizontal slide rail, 803. Vertical slide rail, 804. Bottom plate, 805. Vertical slide rail, 9. Positioning block. DETAILED DESCRIPTION

[0034] The following is combined with Figure 1-Figure 6 , the specific implementation of the present invention is described in detail, but it should be understood that the protection scope of the present invention is not limited by the specific implementation. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0035] like Figure 1-Figure 6 As shown, the large ring forging inner wall flaw detection device and method provided by the present invention include a bracket 101 and an ultrasonic detector, the probe 102 of the ultrasonic detector is arranged on the bracket 101, and the ultrasonic detector is used to detect cracks and pores on the side wall of the ring forging 1. It also includes: a driving mechanism 103, a piston cylinder, a contact block 106 and a stop valve 108, the driving mechanism 103 is connected to the bracket 101, and the driving mechanism 103 is used to drive the bracket 101 to move along the circumferential direction of the ring forging 1 on the side wall of the ring forging 1; the piston cylinder body 104 is connected to the bracket 101, and the inner cavity of the cylinder body 104 is connected to a coupling agent supply device The piston 105 of the piston cylinder is connected to the probe 102 of the ultrasonic detector, and the piston 105 is used to drive the probe 102 to move radially along the ring forging 1; the contact block 106 is arranged on the probe 102, and the contact block 106 is provided with an arc-shaped convex surface, and the arc-shaped convex surface on the contact block 106 is in contact with the inner wall of the ring forging 1. The contact block 106 is used to transmit ultrasonic waves, and a liquid injection port 107 is provided on the arc-shaped convex surface; one end of the stop valve 108 is connected to the liquid injection port 107, and the other end of the stop valve 108 is connected to the inner cavity of the cylinder body 104. When the arc-shaped convex surface on the contact block 106 abuts against the inner wall of the ring forging 1, the stop valve 108 opens.

[0036] The working principle of the above embodiment is briefly described:

[0037] When the device is used, the ring forging 1 is placed at a predetermined position, and then the driving mechanism 103 is controlled to drive the bracket 101 to move along the circumferential direction of the ring forging 1 on the side wall of the ring forging 1, and then the coupling agent supply device is controlled to operate, and the coupling agent supply device supplies coupling agent into the inner cavity of the cylinder 104. After the coupling agent enters the inner cavity of the cylinder 104, the piston 105 is driven to move outward from the cylinder 104, thereby driving the probe 102 to move outward until the arc-shaped convex surface on the contact block 106 is in contact with the inner wall of the ring forging 1. At this time, the stop valve 108 is opened, and the cylinder 1 The coupling agent in the inner cavity of 04 is sprayed out from the liquid spray port 107 on the arc convex surface through the stop valve 108, thereby wrapping the arc convex surface of the contact block 106, reducing the air in the gap between the contact block 106 and the inner wall of the ring forging 1, controlling the action of the ultrasonic detector, and using the ultrasonic detector to generate ultrasonic waves. The ultrasonic waves are transmitted to the inner wall of the ring forging 1 through the contact block 106, and the ultrasonic waves reflected by the ring forging 1 are transmitted back to the contact block 106 and received by the probe 102. The ultrasonic echo is analyzed by the ultrasonic detector, so that the inner wall of the ring forging 1 can be inspected. In this process, as the driving mechanism 103 drives the probe 102 to detect different parts of the inner wall of the ring forging 1 through the bracket 101, the coupling agent supplied by the coupling agent supply device can not only drive the contact block 106 on the probe 102 to always fit the inner wall of the ring forging 1, but the coupling agent can also continue to spray out from the liquid injection port 107 on the arc-shaped convex surface of the contact block 106, thereby always reducing the air in the gap between the contact block 106 and the inner wall of the ring forging 1, thereby reducing the distance that the ultrasonic wave is transmitted in the air, thereby reducing the attenuation of the ultrasonic signal and improving the detection accuracy of the probe 102.

[0038] The large ring forging inner wall flaw detection device of the present invention can reduce the distance that ultrasonic waves are transmitted in the air, thereby reducing the attenuation of ultrasonic signals, improving the detection accuracy of the probe 102, and thus improving the accuracy of flaw detection on the inner wall of the ring forging 1.

[0039] On the basis of the above embodiments, in order to avoid the waste of coupling agent, the accuracy of the timing of releasing the coupling agent is ensured, thereby ensuring the detection effect of the entire device.

[0040] like Figure 1 and Figure 4-Figure 6As shown, the stop valve 108 includes a valve core 201 and a first spring 202, a sliding cavity 203 is provided in the contact block 106, one end of the sliding cavity 203 is communicated with the liquid injection port 107, and the other end of the sliding cavity 203 is communicated with the inner cavity of the cylinder body 104, one end of the valve core 201 is slidably connected in the sliding cavity 203, and the valve core 201 is used to cut off the communication between the liquid injection port 107 and the inner cavity of the cylinder body 104, the first spring 202 is provided in the sliding cavity 203, and the first spring 202 abuts against the valve core 201. Under the action of the elastic force of the first spring 202, the other end of the valve core 201 passes through the liquid injection port 107 and protrudes from the arc convex surface, and a material passing hole 204 is provided on the valve core 201. The protruding end of the valve core 201 can be pressed into the liquid injection port 107 by the inner wall of the ring forging 1, so that the liquid injection port 107 is communicated with the inner cavity of the cylinder body 104 through the material passing hole 204.

[0041] When the inner cavity of the cylinder 104 is filled with coupling agent, the coupling agent drives the piston 105 to move out of the cylinder 104, thereby driving the probe 102 and the contact block 106 to move toward the inner wall side of the ring forging 1, until the arc convex surface on the contact block 106 fits the inner wall of the ring forging 1. At this time, under the pressure of the inner wall of the ring forging 1, the valve core 201 can be driven to move into the sliding cavity 203, and the first spring 202 is compressed by the valve core 201. At this time, the coupling agent in the inner cavity of the cylinder 104 passes through the sliding cavity 203 and the material hole 204 and then sprays out from the liquid spray port 107, thereby wrapping the arc convex surface of the contact block 106. The stop valve 108 of the device can block the release of the coupling agent before the contact block 106 contacts the ring forging 1, and release the coupling agent in time when the contact block 106 contacts the ring forging 1, thereby avoiding the waste of the coupling agent and ensuring the accuracy of the timing of the coupling agent release, thereby ensuring the detection effect of the entire device.

[0042] As a preferred solution, Figure 1 and Figure 4-Figure 6As shown, a connecting plate 301 is provided between the piston 105 and the probe 102, and a sliding hole is provided on the connecting plate 301 along the radial direction of the ring forging 1, and a sliding rod 302 is slidably connected to the sliding hole, and a baffle 303 is provided on the sliding rod 302, and the baffle 303 is arranged on one side of the contact block 106, and a second spring 304 is provided on the sliding rod 302, and the second spring 304 abuts against the baffle 303. Under the action of the elastic force of the second spring 304, the baffle 303 abuts against the inner wall of the ring forging 1, and the baffle 303 is used to enclose the coupling agent sprayed out of the liquid spray port 107. By setting the baffle 303, the piston 105 drives the probe 102 and the contact block 106 to move toward the inner wall of the ring forging 1 through the connecting plate 301 until the arc-shaped convex surface on the contact block 106 fits with the inner wall of the ring forging 1. The baffle 303 abuts against the inner wall of the ring forging 1 on one side of the contact block 106, thereby enclosing the coupling agent sprayed from the liquid injection port 107, thereby preventing the coupling agent from leaking from one side of the contact block 106 when the contact block 106 slides relative to the inner wall of the ring forging 1, thereby ensuring the coupling agent's wrapping of the contact block 106, further reducing the gap between the contact block 106 and the inner wall of the ring forging 1, and improving the detection accuracy of the probe 102.

[0043] As a preferred solution, Figure 1-Figure 3 As shown, the driving mechanism 103 includes a driving wheel 401 and a clamping mechanism 402, the driving wheel 401 is pivotally connected to the bracket 101, the driving wheel 401 abuts against the inner wall of the ring forging 1, the driving wheel 401 is connected to a power device 403, the clamping mechanism 402 is arranged on the bracket 101, the clamping mechanism 402 abuts against the outer wall of the ring forging 1, and the clamping mechanism 402 is used to clamp the side wall of the ring forging 1 between the driving wheel 401 and the clamping mechanism 402. When the driving mechanism 103 drives the bracket 101 to move on the side wall of the ring forging 1, the driving wheel 401 is driven to rotate through the power device 403. Since the driving wheel 401 abuts against the inner wall of the ring forging 1, the driving wheel 401 can drive the bracket 101 to move along the side wall of the ring forging 1. At the same time, under the action of the clamping mechanism 402, the side wall of the ring forging 1 is pressed between the driving wheel 401 and the clamping mechanism 402, thereby ensuring that the driving wheel 401 can be pressed against the inner wall of the ring forging 1, thereby ensuring the stability of the movement of the bracket 101, thereby preventing the gap between the arc-shaped convex surface of the contact block 106 and the inner wall of the ring forging 1 from increasing, thereby further ensuring the detection accuracy of the probe 102.

[0044] As a preferred solution, Figure 1-Figure 3As shown, the clamping mechanism 402 includes a slider 501, a connecting shaft 502, a screw rod 503 and a clamping wheel 504. The bracket 101 is provided with a slide groove 505 along the radial direction of the ring forging 1. The slider 501 is slidably connected in the slide groove 505. The connecting shaft 502 is connected to the slider 501. The clamping wheel 504 is pivotally connected to the connecting shaft 502. A threaded hole is provided on the bracket 101. The screw rod 503 is threadedly connected in the threaded hole. One end of the screw rod 503 is pivotally connected to the slider 501. Rotating the screw rod 503 can drive the slider 501 to slide in the slide groove 505, so as to drive the clamping wheel 504 to press on the outer wall of the ring forging 1. When the clamping mechanism 402 presses the driving wheel 401 against the inner wall of the ring forging 1, the screw rod 503 is rotated so that the screw rod 503 rotates relative to the threaded hole and the slider 501. Under the action of the threaded hole, the slider 501 can be driven to move in the slide groove 505. Since the slide groove 505 moves along the radial direction of the ring forging 1, the connecting shaft 502 and the clamping wheel 504 can be driven to move along the radial direction of the ring forging 1, thereby adjusting the distance between the clamping wheel 504 and the driving wheel 401, so that the driving wheel 401 can be pressed against the inner wall of the ring forging 1 with different wall thicknesses, thereby improving the applicability of the entire device.

[0045] As a preferred solution, Figure 1 and Figure 2As shown, a first connecting rod 601 and a second connecting rod 602 are provided between the connecting shaft 502 and the pressure wheel 504, the first connecting rod 601 and the second connecting rod 602 are both pivotally connected to the connecting shaft 502, and pressure wheels 504 are provided on the first connecting rod 601 and the second connecting rod 602. A coil spring 603 is provided at the connection between the first connecting rod 601 and the connecting shaft 502 and at the connection between the second connecting rod 602 and the connecting shaft 502, and the coil spring 603 is used to apply an elastic force to the first connecting rod 601 and the second connecting rod 602 to move them closer to each other, so as to apply a pressure force to the outer wall of the ring forging 1 through the pressure wheel 504 on the first connecting rod 601 and the pressure wheel 504 on the second connecting rod 602. When the clamping mechanism 402 clamps the side wall of the ring forging 1, the slider 501 slides in the slide groove 505 under the drive of the screw rod 503, thereby driving the connecting shaft 502 to move in the direction close to the driving wheel 401. Under the support force applied by the outer wall of the ring forging 1 to the clamping wheel 504 on the first connecting rod 601 and the clamping wheel 504 on the second connecting rod 602, the first connecting rod 601 and the second connecting rod 602 diverge from each other, the angle between the first connecting rod 601 and the second connecting rod 602 increases, and the elastic force applied by the coil spring 603 to the first connecting rod 601 and the second connecting rod 602 increases. The pressure applied by the clamping wheel 504 on the first connecting rod 601 to the outer wall of the ring forging 1 and the pressure applied by the clamping wheel 504 on the second connecting rod 602 to the outer wall of the ring forging 1 increase, thereby pressing the side wall of the ring forging 1. Combined with the extrusion force applied by the driving wheel 401 to the inner wall of the ring forging 1, under the action of the clamping wheels 504 on the first connecting rod 601 and the second connecting rod 602 and the driving wheel 401, the stability of the movement of the bracket 101 can be further guaranteed, and the gap between the arc-shaped convex surface of the contact block 106 and the inner wall of the ring forging 1 can be prevented from increasing, thereby further ensuring the detection accuracy of the probe 102.

[0046] As a preferred solution, Figure 1 and Figure 5 As shown, the bracket 101 is connected with an axial electric slide rail 7, the length direction of the axial electric slide rail 7 is parallel to the axial direction of the ring forging 1, and the axial electric slide rail 7 is used to drive the cylinder body 104 of the piston cylinder to move axially along the ring forging 1. By providing the axial electric slide rail 7, the cylinder body 104 of the piston cylinder is driven by the axial electric slide rail 7 to move axially along the ring forging 1, thereby driving the probe 102 to move axially along the ring forging 1, so as to perform flaw detection on the entire ring forging 1, and because the length direction of the axial electric slide rail 7 is parallel to the axial direction of the ring forging 1, it can be ensured that when the probe 102 moves axially along the ring forging 1, the arc convex surface of the contact block 106 fits with the inner wall of the ring forging 1.

[0047] As a preferred solution, Figure 1 and Figure 2As shown, a horizontal slide rail 801 is provided on one side of the bracket 101, and a horizontal slider 802 is slidably connected inside the horizontal slide rail 801. The bracket 101 is fixedly connected to the horizontal slider 802. A vertical slide rail 803 is provided on one side of the horizontal slide rail 801. The bottom end of the vertical slide rail 803 is connected to a bottom plate 804. The ring forging 1 is clamped on the bottom plate 804. A vertical slider 805 is slidably connected inside the vertical slide rail 803, and the vertical slider 805 is connected to the horizontal slide rail 801. By setting the horizontal slide rail 801 and the vertical slide rail 803, when the driving mechanism 103 drives the bracket 101 to move along the circumference of the ring forging 1 on the side wall of the ring forging 1, the horizontal slider 802 connected to the bracket 101 slides in the horizontal slide rail 801, and the vertical slider 805 connected to the horizontal slide rail 801 slides in the vertical slide rail 803. Under the guidance of the horizontal slide rail 801 and the vertical slide rail 803, the stability of the movement of the bracket 101 can be ensured, thereby further ensuring that the arc-shaped convex surface on the contact block 106 is in contact with the inner wall of the ring forging 1, thereby reducing the attenuation of ultrasonic waves during transmission.

[0048] As a preferred solution, Figure 1 and Figure 2 As shown, a positioning block 9 is provided on the bottom plate 804, and the positioning block 9 is used to position the ring forging 1 on the bottom plate 804 to ensure the relative position of the ring forging 1 to the bracket 101. By providing the positioning block 9, the ring forging 1 is positioned by using the positioning block 9, thereby ensuring the relative position of the ring forging 1 and the bracket 101 is accurate, thereby further ensuring that the arc convex surface of the contact block 106 indirectly connected to the bracket 101 fits with the inner wall of the ring forging 1, reducing the attenuation of ultrasonic wave transmission.

[0049] The present invention also discloses a method for flaw detection using a large ring forging inner wall flaw detection device, comprising the following steps:

[0050] The ring forging 1 is placed at a predetermined position, and then the controller driving mechanism 103 drives the bracket 101 to move along the axial direction of the ring forging 1 on the side wall of the ring forging 1, and controls the action of the coupling agent supply device;

[0051] The coupling agent supplying device supplies coupling agent into the inner cavity of the cylinder 104. After the coupling agent enters the inner cavity of the cylinder 104, the piston 105 is driven to move outward of the cylinder 104, thereby driving the probe 102 to move outward until the arc-shaped convex surface on the contact block 106 is in contact with the inner wall of the ring forging 1.

[0052] The stop valve 108 is opened, and the coupling agent in the inner cavity of the cylinder body 104 is sprayed out from the spray port 107 on the arc-shaped convex surface through the stop valve 108, thereby wrapping the arc-shaped convex surface of the contact block 106 and reducing the gap between the contact block 106 and the inner wall of the ring forging 1;

[0053] The action of the ultrasonic detector is controlled, and the probe 102 of the ultrasonic detector is used to generate ultrasonic waves. The ultrasonic waves are transmitted to the inner wall of the ring forging 1 through the contact block 106. The ultrasonic waves reflected by the ring forging 1 are transmitted back to the contact block 106 and received by the probe 102. The echo is analyzed by the ultrasonic detector to complete the flaw detection of the inner wall of the ring forging 1.

[0054] While the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that many changes, modifications, substitutions and variations can be made to the embodiments without departing from the principles and spirit of the invention.

Claims

1. A large ring forging inner wall flaw detection device, comprising a bracket (101) and an ultrasonic detector, wherein a probe (102) of the ultrasonic detector is arranged on the bracket (101), and the ultrasonic detector is used to detect cracks and pores on the side wall of the ring forging (1), characterized in that: Also includes: A driving mechanism (103) connected to the support (101), the driving mechanism (103) being used to drive the support (101) to move on the side wall of the ring forging (1) along the circumferential direction of the ring forging (1); A piston cylinder, a cylinder body (104) connected to the bracket (101), an inner cavity of the cylinder body (104) being connected to a coupling agent supply device, a piston (105) of the piston cylinder being connected to a probe (102) of the ultrasonic detector, and the piston (105) being used to drive the probe (102) to move radially along the ring forging (1); A contact block (106) is arranged on the probe (102), the contact block (106) is provided with an arc-shaped convex surface, the arc-shaped convex surface on the contact block (106) is in contact with the inner wall of the ring forging (1), the contact block (106) is used to transmit ultrasonic waves, and a liquid spraying port (107) is provided on the arc-shaped convex surface; A stop valve (108), one end of which is in communication with the liquid spray port (107), and the other end of which is in communication with the inner cavity of the cylinder body (104); when the arc-shaped convex surface on the contact block (106) abuts against the inner wall of the ring forging (1), the stop valve (108) opens; The stop valve (108) comprises a valve core (201) and a first spring (202). A sliding cavity (203) is provided in the contact block (106). One end of the sliding cavity (203) is connected to the liquid spraying port (107), and the other end of the sliding cavity (203) is connected to the inner cavity of the cylinder body (104). One end of the valve core (201) is slidably connected to the sliding cavity (203). The valve core (201) is used to cut off the connection between the liquid spraying port (107) and the inner cavity of the cylinder body (104). The first spring (202) is provided in the contact block (106). 02) is arranged in the sliding cavity (203), the first spring (202) is in contact with the valve core (201), under the action of the elastic force of the first spring (202), the other end of the valve core (201) passes through the liquid injection port (107) and protrudes from the arc-shaped convex surface, and a material passage hole (204) is provided on the valve core (201), and the protruding end of the valve core (201) can be pressed into the liquid injection port (107) by the inner wall of the ring forging (1), so that the liquid injection port (107) is connected with the inner cavity of the cylinder body (104) through the material passage hole (204); A connecting plate (301) is provided between the piston (105) and the probe (102), the connecting plate (301) is provided with a sliding hole along the radial direction of the ring forging (1), the sliding hole is slidably connected to a sliding rod (302), a baffle (303) is provided on the sliding rod (302), the baffle (303) is arranged on one side of the contact block (106), a second spring (304) is provided on the sliding rod (302), the second spring (304) is in contact with the baffle (303), under the action of the elastic force of the second spring (304), the baffle (303) is in contact with the inner wall of the ring forging (1), and the baffle (303) is used to enclose the coupling agent sprayed out of the liquid spraying port (107); When the inner cavity of the cylinder (104) is filled with coupling agent, the coupling agent drives the piston (105) to move out of the cylinder (104), thereby driving the probe (102) and the contact block (106) to move toward the inner wall of the ring forging (1) until the arc-shaped convex surface on the contact block (106) fits the inner wall of the ring forging (1). Under the pressure of the inner wall of the ring forging (1), the valve core (201) moves into the sliding cavity (203), the first spring (202) is compressed by the valve core (201), and the coupling agent in the inner cavity of the cylinder (104) passes through the sliding cavity (203) and the material hole (204) and is then sprayed out from the liquid spray port (107) to wrap the arc-shaped convex surface of the contact block (106).

2. The large ring forging inner wall flaw detection device according to claim 1, characterized in that: The driving mechanism (103) comprises a driving wheel (401) and a pressing mechanism (402); the driving wheel (401) is pivotally connected to the bracket (101); the driving wheel (401) abuts against the inner wall of the ring forging (1); the driving wheel (401) is connected to a power device (403); the pressing mechanism (402) is arranged on the bracket (101); the pressing mechanism (402) abuts against the outer wall of the ring forging (1); the pressing mechanism (402) is used to press the side wall of the ring forging (1) between the driving wheel (401) and the pressing mechanism (402).

3. The large ring forging inner wall flaw detection device according to claim 2, characterized in that: The clamping mechanism (402) comprises a slider (501), a connecting shaft (502), a screw rod (503) and a clamping wheel (504); the bracket (101) is provided with a slide groove (505) along the radial direction of the ring forging (1); the slider (501) is slidably connected in the slide groove (505); the connecting shaft (502) is connected to the slider (501); the clamping wheel (504) is pivotally connected to the connecting shaft (502); a threaded hole is provided on the bracket (101); the screw rod (503) is threadedly connected in the threaded hole; one end of the screw rod (503) is pivotally connected to the slider (501); rotating the screw rod (503) can drive the slider (501) to slide in the slide groove (505) to drive the clamping wheel (504) to be pressed against the outer wall of the ring forging (1).

4. The large ring forging inner wall flaw detection device as claimed in claim 3, characterized in that: A first connecting rod (601) and a second connecting rod (602) are provided between the connecting shaft (502) and the pressure wheel (504); the first connecting rod (601) and the second connecting rod (602) are both pivotally connected to the connecting shaft (502); a pressure wheel (504) is provided on the first connecting rod (601) and the second connecting rod (602); a coil spring (603) is provided at the connection between the first connecting rod (601) and the connecting shaft (502) and at the connection between the second connecting rod (602) and the connecting shaft (502); the coil spring (603) is used to apply an elastic force to the first connecting rod (601) and the second connecting rod (602) to move them closer to each other, so as to apply a pressure force to the outer wall of the ring forging (1) through the pressure wheel (504) on the first connecting rod (601) and the pressure wheel (504) on the second connecting rod (602).

5. The large ring forging inner wall flaw detection device according to claim 1, characterized in that: The bracket (101) is connected to an axial electric slide rail (7), the length direction of the axial electric slide rail (7) is parallel to the axial direction of the ring forging (1), and the axial electric slide rail (7) is used to drive the cylinder body (104) of the piston cylinder to move along the axial direction of the ring forging (1).

6. The large ring forging inner wall flaw detection device according to claim 1, characterized in that: A horizontal slide rail (801) is provided on one side of the bracket (101), a horizontal slider (802) is slidably connected inside the horizontal slide rail (801), the bracket (101) is fixedly connected to the horizontal slider (802), a vertical slide rail (803) is provided on one side of the horizontal slide rail (801), a bottom plate (804) is connected to the bottom end of the vertical slide rail (803), the ring forging (1) is clamped on the bottom plate (804), a vertical slider (805) is slidably connected inside the vertical slide rail (803), and the vertical slider (805) is connected to the horizontal slide rail (801).

7. The large ring forging inner wall flaw detection device according to claim 6, characterized in that: A positioning block (9) is provided on the bottom plate (804), and the positioning block (9) is used to position the ring forging (1) on the bottom plate (804) to ensure the position of the ring forging (1) relative to the bracket (101).

8. A method for flaw detection using the large ring forging inner wall flaw detection device as claimed in claim 1, characterized in that: The following steps are involved: The ring forging (1) is placed at a predetermined position, and then the controller driving mechanism (103) drives the bracket (101) to move along the axial direction of the ring forging (1) on the side wall of the ring forging (1), and controls the action of the coupling agent supply device; The coupling agent supply device supplies coupling agent into the inner cavity of the cylinder (104). After the coupling agent enters the inner cavity of the cylinder (104), the piston (105) is driven to move outward from the cylinder (104), thereby driving the probe (102) to move outward until the arc-shaped convex surface on the contact block (106) is in contact with the inner wall of the ring forging (1); The stop valve (108) is opened, and the coupling agent in the inner cavity of the cylinder body (104) is sprayed out from the spray port (107) on the arc-shaped convex surface through the stop valve (108), thereby wrapping the arc-shaped convex surface of the contact block (106) and reducing the gap between the contact block (106) and the inner wall of the ring forging (1); The ultrasonic detector is controlled to operate, and the probe (102) of the ultrasonic detector is used to generate ultrasonic waves, which are transmitted to the inner wall of the ring forging (1) through the contact block (106). The ultrasonic waves reflected by the ring forging (1) are transmitted back to the contact block (106) and received by the probe (102). The ultrasonic detector analyzes the echo, thereby completing the flaw detection of the inner wall of the ring forging (1).

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