An engine block testing device

Abstract

This application relates to an engine cylinder block testing device, belonging to the field of cylinder block testing equipment. The device includes a rod, an air supply device, and a testing disc disposed at the end of the rod. A flexible element is sleeved around the periphery of the testing disc; the outer wall of the flexible element fits against the inner wall of the cylinder block. Multiple testing channels are evenly distributed around the periphery of the testing disc; the testing channels penetrate the flexible element; the air supply device is connected to the multiple testing channels; the air supply device is used to supply air pressure into the multiple testing channels; a movable plug is disposed within each testing channel; the movable plug is used to separate the testing channel from an indicator tube; an indicator tube is disposed on the testing disc; the indicator tube contains testing fluid; the indicator tube is connected to the testing channel; and an image sensor is disposed on the rod. This application has the technical effects of simplifying testing operations and protecting the cylinder block.

Description

Technical Field

[0001] This application relates to the technical field of cylinder block testing equipment, and in particular to an engine cylinder block testing equipment. Background Technology

[0002] The roundness accuracy and sealing performance of the piston cylinder wall are core indicators for ensuring reliable engine operation. Deviations in accuracy or defects in sealing can directly lead to pressure loss within the cylinder, abnormal piston movement, and consequently, reduced engine power output and fuel efficiency, shortening the overall engine lifespan. Existing testing methods, such as cylinder gauge measurements, are prone to damaging the precision inner wall of the cylinder block and have low testing efficiency, making them unsuitable for large-scale production. Furthermore, manual observation of test data is susceptible to subjective errors, affecting the accuracy of the test results.

[0003] Patent (202211480140.4) discloses a cylinder bore inspection device for engine block castings, including a worktable with a lifting plate above it. Multiple inspection mechanisms are equidistantly arranged on the lifting plate. Each inspection mechanism includes a circular sealing plate with a sleeve centrally located and rotatably connected to it. A probe rod slides through the sleeve and is circumferentially stopped with the sleeve. A collection head is mounted on the bottom circumferential surface of the probe rod, with its collection direction aligned with the radial direction of the probe rod. A connecting frame is fixed to the sleeve, and a lamp holder is mounted on the connecting frame. A lamp head is mounted on the lamp holder, which has a linear travel corresponding to the radial direction of the probe rod. The lamp head is tilted outwards, and its illumination area corresponds to the collection area of ​​the collection head. This patent transforms cylinder bore surface problems into singular shadow features through illumination, enabling the detection of cylinder block cracks. However, this patent has high requirements for the working environment, preventing the intrusion of dust, moisture, and other impurities, and also requires a high degree of brightness in the working scene, which can easily lead to inspection errors.

[0004] Regarding the aforementioned technologies, the inventors believe that they suffer from drawbacks such as low detection efficiency and the tendency to scratch the inner wall of the cylinder during detection. Summary of the Invention

[0005] To address the aforementioned technical problems, this application provides an engine cylinder block testing device.

[0006] This application provides an engine cylinder block testing device, which adopts the following technical solution:

[0007] An engine cylinder block testing device includes a rod, an air supply device, and a testing disc disposed at the end of the rod. A flexible element is sleeved around the periphery of the testing disc; the outer wall of the flexible element is fitted against the inner wall of the cylinder block. Multiple testing channels are evenly distributed around the periphery of the testing disc; the testing channels penetrate the flexible element. The air supply device communicates with the multiple testing channels and is used to supply air pressure into the multiple testing channels. A movable plug is disposed within each testing channel; the movable plug has an elastic degree of freedom to slide along the length of the testing channel; the movable plug is used to separate the testing channel from an indicator tube. An indicator tube is disposed on the testing disc; the indicator tube contains a testing liquid; the indicator tube communicates with the testing channel. An image sensor is disposed on the rod; the image sensor is used to identify the liquid level in the multiple indicator tubes.

[0008] By adopting the above technical solution, air pressure is supplied to the detection channel through the air supply device. The movable plug can slide along the detection channel according to the air pressure change, thereby causing a change in the liquid level of the detection liquid in the indicator tube. The image sensor can accurately identify the liquid level in the indicator tube, thus accurately judging the condition of the inner wall of the cylinder based on the liquid level change. Only the detection disc at the end of the rod needs to be inserted into the cylinder, and the detection can be completed quickly through the air supply device and image sensor. Compared with traditional detection methods, the detection time is greatly shortened and the detection efficiency is improved, which can meet the detection needs of mass production. By setting up a flexible part and cooperating with the air pressure to contact the inner wall of the cylinder, the detection disc is prevented from scratching the inner wall of the cylinder, thus improving the safety of the detection.

[0009] Preferably, the flexible component is a flexible rubber ring; an annular cavity communicating with the detection channel is formed inside the flexible component; a one-way valve is provided at the connection between the annular cavity and the detection channel; the air supply device is connected to the annular cavity; the air supply device is used to introduce air pressure into the annular cavity.

[0010] By adopting the above technical solution, the flexible rubber ring itself has good elasticity. Combined with the annular cavity inflation design, it can expand adaptively through air pressure, closely fit the inner wall of the cylinder, and has an automatic positioning effect. By setting a one-way valve, air pressure can only be introduced into the detection channel through the one-way valve after the air pressure inside the flexible part is sufficient, ensuring that the flexible part completely seals the detection channel when the cylinder is being tested.

[0011] Preferably, the top wall of the flexible component is provided with an annular baffle; the annular baffle, the top wall of the flexible component, and the inner wall of the cylinder form an annular detection water tank; the annular detection water tank is used to store water.

[0012] By adopting the above technical solution, an annular baffle is set up, which together with the top wall of the flexible component and the inner wall of the cylinder form an annular detection water tank. When the flexible component is not tightly attached to the inner wall of the cylinder, air bubbles will be generated in the water of the annular detection water tank, which makes it easy for personnel to judge the sealing performance of the flexible component in real time.

[0013] Preferably, the gas supply device includes a gas supply source and a gas supply pipe; the two ends of the gas supply pipe are respectively connected to the gas supply source and the annular cavity.

[0014] Preferably, the flexible component is provided with a marking box; the marking box contains a fluorescent agent; multiple marking seats are provided on the outer wall of the flexible component; the multiple marking seats are evenly distributed on the outer periphery of multiple detection channels; the marking seats are provided with marking holes communicating with the marking box; a switching unit is provided in the marking holes; the switching unit is used to close or open the marking holes.

[0015] By adopting the above technical solution, when the detection channel identifies cracks or other defects on the inner wall of the cylinder through changes in air pressure, the corresponding marking hole can be opened through the on / off unit, allowing the fluorescent agent in the marking box to accurately adhere to the defect location through the marking hole. After the detection is completed, the operator can quickly locate the defect location through fluorescent detection without having to re-check the detection data, which greatly shortens the connection time from detection to repair. It is especially suitable for targeted repair procedures after batch detection.

[0016] Preferably, the marking hole has an open / closed section and a liquid outlet section; the two ends of the liquid outlet section are respectively connected to the marking box and the outside; the open / closed section is connected to the liquid outlet section; the open / closed unit is located within the open / closed section; the open / closed unit has an elastic degree of freedom to slide along the length direction of the open / closed section; after sliding, the open / closed unit is used to open or close the liquid outlet section.

[0017] By adopting the above technical solution, the marking hole is divided into an on / off section and a liquid outlet section. The on / off unit only needs to slide radially along the on / off section to control the opening and closing of the liquid inlet. The structure is simple and the response is fast. The on / off unit will only slide open the liquid inlet when a defect is detected at the corresponding position, so as to avoid leakage of fluorescent agent due to failure or accidental triggering of the on / off unit and reduce contamination of the defect-free cylinder. The liquid inlet is located on the side wall of the on / off section. Under normal conditions, the on / off unit can tightly seal the liquid inlet. With the elastic degree of freedom of the on / off unit, it can maintain a stable seal in a defect-free state, further reducing the risk of mismarking.

[0018] Preferably, the on / off unit includes a detection rod and a first elastic element; the detection rod is slidably disposed within the on / off section; a limit block is provided on the detection rod; the first elastic element is sleeved on the detection rod; one end of the first elastic element is connected to the limit block, and the other end is connected to the marker seat; the first elastic element is used to push the detection rod away from the marker box; after the detection rod slides, it is used to open or close the liquid outlet section.

[0019] Preferably, the flexible component has multiple air storage chambers on its outer wall; each of the multiple air storage chambers is connected to a corresponding open / closed section; an air inlet channel is provided on the side wall of each air storage chamber; a one-way valve assembly is provided at the air inlet channel; the one-way valve assembly is used to open or close the air inlet channel; a connecting pipe is provided inside the air storage chamber; one end of the connecting pipe is connected to the liquid outlet section; the other end of the connecting pipe passes through the air storage chamber and is connected to the outside; the open / closed section is connected to the marking base; the marking box has an opening; a flexible plate is provided at the opening; the flexible plate is located inside the annular cavity.

[0020] By adopting the above technical solution, when a crack appears on the cylinder, the gas in the detection channel enters the gas storage chamber through the crack; the one-way valve assembly only allows gas to enter the gas storage chamber, while the gas in the gas storage chamber cannot leak outward, thus storing gas pressure in the storage box; since the flexible plate is located in the annular cavity, the gas pressure generated when the annular cavity is filled with gas will squeeze the flexible plate, causing the internal space of the marking box to shrink and the pressure to increase; this, in turn, cooperates with the first elastic element to squeeze the detection rod and seal the liquid outlet section; when the annular cavity is depressurized, the flexible plate returns to its original shape, and the pressure in the marking box decreases accordingly; the gas pressure stored in the gas storage chamber will overcome the elastic force of the first elastic element and squeeze the detection rod to move, connecting the liquid outlet section with the marking box, allowing the fluorescent agent to enter the crack from the liquid outlet section, thus achieving the automatic marking effect of the crack.

[0021] Preferably, the detection rod has a through hole; after the detection rod slides, the through hole is connected to or misaligned with the liquid outlet section; the detection rod also has an exhaust channel for connecting the through hole and the gas storage chamber.

[0022] Preferably, the one-way air intake valve assembly includes a flexible sealing ring and a blocking plate disposed within the air intake channel; the flexible sealing ring is located inside the blocking plate; the blocking plate is provided with multiple air inlets; the multiple air inlets are evenly distributed circumferentially along the air intake channel.

[0023] By adopting the above technical solution, the gas at the crack can enter the gas storage chamber through the air inlet. When the gas flows, it can blow the flexible sealing ring into the gas storage chamber. When the flexible component leaks, the gas in the gas storage chamber will press the flexible sealing ring against the sealing plate and close the air inlet, thus achieving a one-way flow effect of the air inlet channel.

[0024] In summary, this application includes at least one of the following beneficial technical effects:

[0025] 1. Air pressure is supplied to the detection channel through an air supply device. The movable plug slides along the detection channel according to the air pressure changes, thereby causing a change in the liquid level in the indicator tube. The image sensor can accurately identify the liquid level in the indicator tube, thus accurately judging the condition of the inner wall of the cylinder based on the changes in the liquid level. Only the detection disc at the end of the rod needs to be inserted into the cylinder. The detection can be completed quickly through the air supply device and image sensor. Compared with traditional detection methods, the detection time is greatly shortened and the detection efficiency is improved, which can meet the detection needs of mass production. By setting up a flexible part and cooperating with the air pressure to contact the inner wall of the cylinder, the detection disc is prevented from scratching the inner wall of the cylinder, thus improving the safety of the detection.

[0026] 2. When a crack appears on the cylinder body, the gas in the detection channel enters the gas storage chamber through the crack. The one-way valve assembly only allows gas to enter the gas storage chamber, while the gas in the gas storage chamber cannot leak outward, thus storing gas pressure in the storage box. Since the flexible plate is located in the annular cavity, the gas pressure generated when the annular cavity is filled with gas will squeeze the flexible plate, causing the internal space of the marking box to shrink and the pressure to increase. This, in turn, cooperates with the first elastic element to squeeze the detection rod and seal the liquid outlet section. When the annular cavity is depressurized, the flexible plate returns to its original shape, and the pressure in the marking box decreases accordingly. The gas pressure stored in the gas storage chamber will overcome the elastic force of the first elastic element and squeeze the detection rod to move, connecting the liquid outlet section with the marking box, allowing the fluorescent agent to enter the crack from the liquid outlet section, thus achieving the automatic marking effect of the crack. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of an engine block testing device.

[0028] Figure 2 This is a schematic diagram of the internal structure of the detection disk in the embodiment.

[0029] Figure 3 This is a schematic diagram of the internal structure of the flexible component in the embodiment.

[0030] Figure 4 yes Figure 3 A magnified view of part A in the image.

[0031] Figure 5 yes Figure 3 A magnified view of part B in the image.

[0032] Explanation of reference numerals in the attached figures:

[0033] 1. Rod body;

[0034] 2. Gas supply device; 21. Gas supply source; 22. Gas supply pipe;

[0035] 3. Detection disc; 31. Detection channel; 311. Movable plug; 312. Second elastic element; 32. One-way valve;

[0036] 4. Flexible component; 41. Annular cavity; 42. Annular baffle; 43. Air storage cavity; 44. Air inlet channel; 45. Connecting pipe;

[0037] 5. Indicator tube;

[0038] 6. Marking box; 61. Flexible board;

[0039] 7. Marker seat; 71. On / off section; 711. Liquid inlet; 72. Liquid outlet section; 73. Marker hole;

[0040] 8. On / off unit; 81. Detection rod; 811. Through hole; 812. Exhaust channel; 82. First elastic element;

[0041] 9. One-way valve assembly; 91. Flexible sealing ring; 92. Sealing plate; 921. Air inlet. Detailed Implementation

[0042] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0043] This application discloses an engine cylinder block testing device. (Refer to...) Figure 1-3 The device includes a rod body 1, an air supply device 2, and a detection disc 3 disposed at the end of the rod body 1. A flexible element 4 is sleeved around the periphery of the detection disc 3. The outer wall of the flexible element 4 is fitted with the inner wall of the cylinder body. Multiple detection channels 31 are evenly distributed around the periphery of the detection disc 3. The detection channels 31 pass through the flexible element 4. The air supply device 2 is connected to the multiple detection channels 31. The air supply device 2 is used to supply air pressure into the multiple detection channels 31. An indicator tube 5 is disposed on the detection disc 3. The indicator tube 5 contains a detection liquid. The indicator tube 5 is connected to the detection channel 31. A movable plug 311 is disposed in the detection channel 31. The movable plug 311 has an elastic degree of freedom to slide along the length direction of the detection channel 31. The movable plug 311 is used to separate the detection channel 31 and the indicator tube 5. A second elastic element 312 is connected between the movable plug 311 and the inner wall of the detection channel 31; the second elastic element 312 is a spring; the second elastic element 312 can push the movable plug 311 to move outward of the detection disk 3; an image sensor is provided on the rod 1; the image sensor is used to identify the liquid level in multiple indicator tubes 5; a central control module is provided in the image sensor; the data input terminal of the central control module is connected to the data output terminal of the image sensor; the image sensor can transmit the captured data to the central control module; the central control module is connected to a display screen; specifically, the data output terminal of the central control module is connected to the data input terminal of the display screen; the central control module can transmit the image data transmitted by the image sensor to the display screen.

[0044] Furthermore, referring to Figure 2 and Figure 3 The flexible component 4 is a flexible rubber ring; an annular cavity 41 communicating with the detection channel 31 is provided inside the flexible component 4; a one-way valve 32 is provided at the connection between the annular cavity 41 and the detection channel 31; the air supply device 2 can be connected to the annular cavity 41; the air supply device 2 is used to introduce air pressure into the annular cavity 41; the air supply device 2 includes an air supply source 21 and an air supply pipe 22; the two ends of the air supply pipe 22 are respectively connected to the air supply source 21 and the annular cavity 41; before operation, the flexible component 4 is in a depressurized state, and when the detection plate 3 is placed in the cylinder, the flexible component 4 does not contact the side wall of the cylinder; during operation, the air supply source 21 Air is supplied to the annular cavity 41 through the air supply pipe 22, causing the flexible component 4 to expand and its outer wall to abut against the inner wall of the cylinder, thereby sealing the detection channel 31. When the air pressure in the annular cavity 41 is sufficient, the gas in the annular cavity 41 will enter the detection channel 31 through the one-way valve 32, causing the air pressure in the detection channel 31 to gradually increase and push the movable plug 311 to move, thereby causing the liquid level in the indicator tube 5 to move. When the roundness of the cylinder is standard, the liquid level in multiple indicator tubes 5 is the same. When the roundness of the cylinder is not standard, the liquid level in multiple indicator tubes 5 is not the same.

[0045] An annular baffle 42 is provided on the top wall of the flexible component 4; the annular baffle 42, the top wall of the flexible component 4 and the inner wall of the cylinder form an annular detection water tank; water is stored in the annular detection water tank; when the flexible component 4 is not tightly attached to the inner wall of the cylinder, air bubbles will be generated in the water of the annular detection water tank, which makes it easy for personnel to judge the sealing performance of the flexible component 4 in real time.

[0046] Reference Figure 2 , Figure 3 and Figure 5 A marking box 6 is provided on the flexible component 4; the marking box 6 contains a fluorescent agent; the marking box 6 has an opening; a flexible plate 61 is provided at the opening; the flexible plate 61 is made of rubber; the flexible plate 61 is located in the annular cavity 41; multiple marking seats 7 are provided on the outer wall of the flexible component 4; the multiple marking seats 7 are evenly distributed on the outer periphery of multiple detection channels 31; the marking seat 7 has a marking hole 73 communicating with the marking box 6; the marking hole 73 has a through section 71 and a liquid outlet section 72; the two ends of the liquid outlet section 72 are respectively connected to the marking box 6 and the outside; the through section 71 is connected to the liquid outlet section 72; the through section 71 is provided with a through unit 8; the through unit 8 has an elastic degree of freedom to slide along the length direction of the through section 71; after sliding, the through unit 8 is used to open or close the liquid outlet section 72.

[0047] Specifically, refer to Figure 4The on / off unit 8 includes a detection rod 81 and a first elastic element 82. The detection rod 81 is slidably disposed within the on / off section 71. A limit block is provided on the detection rod 81. The first elastic element 82 is a spring. The first elastic element 82 is sleeved on the detection rod 81. One end of the first elastic element 82 is connected to the limit block, and the other end is connected to the marker seat 7. The first elastic element 82 is used to push the detection rod 81 away from the marker box 6. After the detection rod 81 slides, it is used to open or close the liquid outlet section 72. Under normal circumstances, the first elastic element 82 can move the detection rod 81 away from the marker box 6 and disconnect the liquid outlet section 72. The first elastic element 82 provides the thrust of the detection rod 81 to achieve the effect of closing the liquid outlet section 72 under normal circumstances. The air pressure provided in the crack can overcome the elastic force of the first elastic element 82. Multiple air storage chambers 43 are opened on the outer wall of the flexible element 4. The multiple air storage chambers 43 are respectively connected to the multiple on / off sections 71 one by one. An air inlet channel 44 is opened on the side wall of the air storage chamber 43. A one-way valve assembly 9 is provided at 44 locations; the one-way valve assembly 9 is used to open or close the air intake channel 44; the one-way air intake valve assembly includes a flexible sealing ring 91 and a blocking plate 92 disposed within the air intake channel 44; the flexible sealing ring 91 is located inside the blocking plate 92; the blocking plate 92 is provided with multiple air inlets 921; the multiple air inlets 921 are evenly distributed along the circumference of the air intake channel 44; a connecting pipe 45 is provided within the air storage chamber 43; the liquid outlet section 72 has two parts; the detection rod 81 will... Two liquid outlet sections 72 are separated; one liquid outlet section 72 is connected to the marking box 6; the other liquid outlet section 72 is connected to one end of the connecting pipe 45; the other end of the connecting pipe 45 passes through the gas storage chamber 43 and is connected to the outside; the on / off section 71 is connected to the marking seat 7; a through hole 811 is provided in the detection rod 81; after the detection rod 81 slides, the through hole 811 is connected to or misaligned with the two liquid outlet sections 72; an exhaust channel 812 is also provided on the detection rod 81 to connect the through hole 811 and the gas storage chamber 43.

[0048] When there is a crack on the side wall of the cylinder, the gas in the detection channel 31 will enter the crack. The gas at the crack can enter the gas storage chamber 43 through the air inlet 921. At this time, the gas flow can blow the flexible sealing ring 91 into the gas storage chamber 43. When the flexible component 4 deflates, the gas in the gas storage chamber 43 will press the flexible sealing ring 91 against the sealing plate 92 and close the multiple air inlets 921, so that the gas storage chamber 43 stores air pressure. Since the flexible plate 61 is located in the annular cavity 41, the air pressure generated when the annular cavity 41 is filled with air will squeeze the flexible plate 61, causing the internal space of the marking box 6 to shrink and the pressure to increase. In turn, it will cooperate with the first elastic component 82 to squeeze the detection rod 81. The liquid outlet section 72 is then sealed. At this time, the gas pressure stored in the gas storage chamber 43 cannot simultaneously overcome the pressure in the first elastic element 82 and the marking box 6. When the annular cavity 41 releases gas, the flexible plate 61 returns to its original state, and the pressure in the marking box 6 decreases accordingly. The gas pressure stored in the gas storage chamber 43 will overcome the elastic force of the first elastic element 82 and squeeze the detection rod 81 to move. The liquid outlet section 72 is connected to the through hole 811 of the detection rod 81, thereby connecting the liquid outlet section 72 to the marking box 6, allowing the fluorescent agent to enter the crack from the liquid outlet section 72, achieving the automatic marking effect of the crack and sealing the air inlet 921. The gas in the gas storage chamber 43 enters the liquid outlet section 72 and follows the fluorescent agent into the crack.

[0049] As the gas from the crack enters the gas storage chamber 43, some of the gas enters the liquid outlet section 72. When the annular cavity 41 releases gas, the gas in the crack flows back into the detection channel 31, and the gas in the liquid outlet section 72 moves into the crack. At this time, the liquid outlet section 72 is connected. The gas flowing outward from the liquid outlet section 72 carries the fluorescent agent into the crack, so that the fluorescent agent fully covers the crack.

[0050] The working principle of the engine block testing device in this application is as follows:

[0051] Before operation, the flexible component 4 is in a depressurized state, with no air pressure in the annular cavity 41, and the flexible component 4 remains contracted. During testing, the test disc 3 is placed into the engine cylinder to be tested. At this time, the contracted flexible component 4 does not contact the inner wall of the cylinder, ensuring that the test disc 3 is placed smoothly without scratching the cylinder wall. Then, the air supply device 2 is started, and the air supply source 21 inflates the annular cavity 41 of the flexible component 4 through the air supply pipe 22. The flexible component 4 expands outward under the air pressure until the outer wall tightly abuts the inner wall of the cylinder. This can isolate the multiple test channels 31 around the test disc 3 from the inner cavity of the cylinder, forming an independent air pressure test space. At the same time, after the air pressure in the annular cavity 41 reaches the threshold, the gas will enter each test channel 31 through the one-way valve 32, causing the air pressure in the test channel 31 to gradually increase.

[0052] When the air pressure in the detection channel 31 increases, it pushes the movable plug 311 in the channel to slide, thereby squeezing the detection liquid in the indicator tube 5 and causing the liquid level to change. Since the detection channels 31 are evenly distributed along the periphery of the detection disk 3: if the cylinder roundness is standard, the reaction force of the cylinder wall on each detection channel 31 is consistent, the air pressure is the same, and the liquid level in all indicator tubes 5 is the same. If the cylinder roundness is not standard, such as local bulges or depressions: the air pressure in the detection channels 31 at the corresponding positions will be different, with higher air pressure at the bulges and lower air pressure at the depressions, and the liquid level in the indicator tubes 5 will be different accordingly. The image sensor can automatically identify the difference in liquid level and determine whether the roundness is qualified.

[0053] The annular baffle 42 on the top wall of the flexible component 4, together with the top wall of the flexible component 4 and the inner wall of the cylinder, forms an annular detection water tank, which is pre-filled with water. If the flexible component 4 does not fit tightly with the inner wall of the cylinder, the gas in the detection channel 31 will leak from the gap into the annular detection water tank, causing bubbles to be generated in the water. The staff can observe the bubbles in real time and judge that the seal has failed, and the detection plate 3 needs to be readjusted.

[0054] If cracks exist on the inner wall of the cylinder, the equipment will automatically mark the cracks. The specific working process is as follows:

[0055] Step 1: The gas in the crack enters the gas storage chamber 43 through the air inlet channel 44. At this time, the gas will blow the flexible sealing ring 91 in the air inlet channel 44, opening the air inlet 921 and allowing the gas to enter the gas storage chamber 43 smoothly. When the annular cavity 41 releases gas later, the flexible sealing ring 91 will be pressed against the sealing plate 92 by the gas pressure in the gas storage chamber 43, sealing the air inlet 921 and storing the gas in the gas storage chamber 43.

[0056] Step 2: After the annular cavity 41 is vented, its internal air pressure decreases: the flexible plate 61, which was originally squeezed by the air pressure of the annular cavity 41, returns to its original shape, the internal space of the marking box 6 expands and the pressure decreases; the air pressure stored in the gas storage cavity 43 can now overcome the elastic force of the first elastic element 82, pushing the detection rod 81 to slide, so that the through hole 811 in the detection rod 81 is aligned with the liquid outlet section 72 of the marking seat 7, so that the fluorescent agent in the marking box 6 enters the crack through the liquid outlet section 72.

[0057] Step 3: Fluorescent agent in the crack marking box 6 is injected into the crack through the liquid outlet section 72 under its own pressure and the gas in the gas storage chamber 43; at the same time, the gas in the gas storage chamber 43 follows the fluorescent agent into the crack, causing the fluorescent agent to fully cover the inside of the crack, so as to achieve accurate marking of the crack; the crack location can then be quickly found by illuminating it with a fluorescent lamp.

[0058] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An engine block inspection apparatus characterized by comprising: The utility model provides a kind of gas pressure detection device, including rod body (1), gas supply device (2) and the detection disc (3) being arranged in the end of the rod body (1);The periphery of the detection disc (3) is sleeved with flexible member (4);The outer wall of the flexible member (4) is attached with the inner wall of cylinder;Multiple detection channels (31) are evenly provided in the periphery of the detection disc (3);The detection channel (31) penetrates the flexible member (4);The gas supply device (2) is communicated with multiple detection channels (31);The gas supply device (2) is used to pass into air pressure in multiple detection channels (31);Detection channel (31) is provided with movable plug (311);The movable plug (311) has the elastic freedom of sliding along the length direction of the detection channel (31);Detection disc (3) is provided with indicating tube (5);The indicating tube (5) has detection liquid;The indicating tube (5) is communicated with the detection channel (31);Movable plug (311) is used to separate the detection channel (31) and the indicating tube (5);Rod body (1) is provided with image sensor;The image sensor is used to identify the liquid level in multiple indicating tubes (5); Flexible member (4) is provided with marking box (6);The marking box (6) has fluorescent agent;The outer wall of the flexible member (4) is provided with multiple marking seats (7);Multiple marking seats (7) are evenly distributed in the outer periphery of multiple detection channels (31);Marking hole (73) is opened in the marking seat (7) and is communicated with the marking box (6);On-off unit (8) is arranged in the marking hole (73);The on-off unit (8) is used to close or open the marking hole (73); The marking hole (73) has on-off section (71) and liquid outlet section (72);The two ends of the liquid outlet section (72) are communicated with the marking box (6) and the outside respectively;The on-off section (71) is communicated with the liquid outlet section (72);The on-off unit (8) is located in the on-off section (71);The on-off unit (8) has the elastic freedom of sliding along the length direction of the on-off section (71);The on-off unit (8) is used to open or close the liquid outlet section (72) after sliding; The on-off unit (8) includes detection rod (81) and first elastic member (82);The detection rod (81) is slidably arranged in the on-off section (71);Limiting block is arranged on the detection rod (81);The first elastic member (82) is sleeved on the detection rod (81);One end of the first elastic member (82) is connected with the limiting block, and the other end is connected with the marking seat (7);The first elastic member (82) is used to push the detection rod (81) away from the marking box (6);The detection rod (81) is used to open or close the liquid outlet section (72) after sliding; The outer wall of the flexible piece (4) is provided with a plurality of gas storage cavities (43); a plurality of the gas storage cavities (43) are in one-to-one correspondence with a plurality of the on-off sections (71) and are in communication; the gas storage cavities (43) are provided with a communication pipe (45); one end of the communication pipe (45) is in communication with the liquid outlet section (72); the other end of the communication pipe (45) penetrates through the gas storage cavity (43) and is in communication with the outside. The detection rod (81) is provided with a through hole (811); the through hole (811) is in communication or misaligned with the liquid outlet section (72) after the detection rod (81) slides; the detection rod (81) is further provided with an exhaust passage (812) for communicating the through hole (811) and the gas storage cavity (43).

2. An engine block inspection apparatus according to claim 1, characterized by: The flexible piece (4) is a flexible rubber ring; the flexible piece (4) is provided with an annular cavity (41) in communication with the detection channel (31); the annular cavity (41) is provided with a one-way valve (32) at the communication position with the detection channel (31); the gas supply device (2) is in communication with the annular cavity (41); the gas supply device (2) is used for supplying gas pressure into the annular cavity (41).

3. An engine block inspection apparatus according to claim 2, characterized by: The top wall of the flexible piece (4) is provided with an annular baffle (42); the annular baffle (42), the top wall of the flexible piece (4) and the inner wall of the cylinder body form an annular detection water tank; the annular detection water tank is used for storing water.

4. An engine block inspection apparatus according to claim 2, characterized by: The gas supply device (2) comprises a gas supply source (21) and a gas supply pipe (22); the two ends of the gas supply pipe (22) are respectively in communication with the gas supply source (21) and the annular cavity (41).

5. An engine block inspection apparatus according to claim 4, characterized by: The side wall of the gas storage cavity (43) is provided with an air inlet passage (44); the air inlet passage (44) is provided with a one-way valve assembly (9); the one-way valve assembly (9) is used for opening or closing the air inlet passage (44); the on-off section (71) is in communication with the mark seat (7); the mark box (6) is provided with an opening; the opening is provided with a flexible plate (61); the flexible plate (61) is located in the annular cavity (41).

6. An engine block inspection apparatus according to claim 5, characterized by: The one-way air inlet valve assembly comprises a flexible sealing ring (91) and a plugging plate (92) arranged in the air inlet passage (44); the flexible sealing ring (91) is located on the inner side of the plugging plate (92); the plugging plate (92) is provided with a plurality of air inlets (921); a plurality of the air inlets (921) are uniformly distributed along the circumference of the air inlet passage (44).

Images