CN214793652U

CN214793652U - Air tightness detection device for cylinder cover

Info

Publication number: CN214793652U
Application number: CN202121181738.4U
Authority: CN
Inventors: 杨少鹏
Original assignee: Jiangxi Xindehe Auto Parts Co ltd
Current assignee: Jiangxi Xindehe Auto Parts Co ltd
Priority date: 2021-05-28
Filing date: 2021-05-28
Publication date: 2021-11-19
Anticipated expiration: 2031-05-28

Abstract

The utility model discloses a cylinder head gas tightness detection device, include: a frame; the detection table is arranged on the frame and used for placing the cylinder cover to be detected; the pressing mechanism is arranged on the frame and can contact the cylinder cover and fix the cylinder cover on the detection table; the detection mechanism is arranged on the frame and comprises a sealing mechanism and an inflation mechanism, the sealing mechanism corresponds to the position of a passage opening of an air passage and/or an oil passage and/or a water passage on the cylinder cover, the sealing mechanism can move relative to the detection platform and can be close to the cylinder cover and close the passage opening, the inflation mechanism is arranged on the sealing mechanism, and the inflation mechanism is communicated with the passage opening and can inflate gas into the passage opening; and a detection box which is arranged on the frame, is provided with liquid, and can move relative to the detection platform to enable the cylinder cover to enter the detection box. The beneficial effects of the utility model are that the gas tightness homoenergetic to the inside water course of cylinder head, air flue and oil duct detects, and detection efficiency is high, and it is convenient, simple to detect.

Description

Air tightness detection device for cylinder cover

Technical Field

The utility model relates to a leakproofness check out test set, concretely relates to cylinder head gas tightness detection device.

Background

The engine cylinder cover, the cylinder sleeve and the piston jointly form a combustion chamber of the diesel engine, and the cylinder cover is one of parts of the diesel engine which bear high-temperature and high-pressure working conditions. The cylinder cover is cast by cast iron or aluminum alloy, is a mounting base of the valve mechanism and is also a sealing cover of the cylinder, and the engine cylinder cover is the most complex part of all parts of the diesel engine and bears the greatest mechanical load and thermal load. The pretightening force of the bolts borne by the top surface of the cylinder cover is far greater than the combustion pressure, and the bottom surface of the cylinder cover bears the pressure and the heat load of high-pressure gas generated by fuel combustion. When the diesel engine works, the mechanical stress and the thermal stress born by the cylinder cover are very complicated. The inner cavity of the cylinder cover is provided with an air inlet channel, an exhaust channel, an air inlet valve, an exhaust valve, a fuel injector and the like. The cylinder head bottom plate, the intake and exhaust valve, the exhaust passage, the oil injector and the like are in direct contact with high-temperature gas generated by combustion of fuel in the combustion chamber, and bear and transfer part of heat of the high-temperature gas; in addition, mechanical and thermal stresses make the head plate susceptible to fatigue deformation. The cylinder cover is provided with a cooling water cavity, heated parts are cooled by cooling water, the heat load of the parts is improved, and the reliable use of the parts is ensured. The poor assembling state between the oil sprayer sleeve and the cylinder cover can cause cooling water to permeate or directly leak to a combustion chamber. If the amount of cooling water penetrating into the combustion chamber is small, the cooling water can be combusted together with fuel, so that scale deposits appear on the wall surface of the combustion chamber, and heat transfer of heated parts is directly influenced, so that the heated parts are overheated and damaged; if the leakage is severe, the cooling water entering the combustion chamber may even cause a water hammer failure in the diesel engine and be severely damaged. The poor sealing of the sand removal process (hole plug) of the cylinder cover causes the leakage of cooling water, so that the water consumption is increased, and the serious result of the leakage of the cooling water affects the completion of the operation of the locomotive.

Therefore, in the manufacturing process of the cylinder cover of the automobile, the detection of the air tightness plays an important role in the running safety of the whole automobile, and in view of the above, no matter whether the cylinder cover is a new cylinder cover or a repaired cylinder cover, an air tightness test must be carried out to confirm that the assembling state of the water cavity wall, the air inlet valve seat, the air outlet valve seat, the oil injector sleeve and the cylinder cover and the sealing state of the process plug are good, so that the cylinder cover is ensured to be in a good running state in a repair period.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to solve one of the technical problem that exists among the prior art at least, provide a cylinder head gas tightness detection device.

The technical solution of the utility model is as follows:

a cylinder head airtightness detection apparatus includes:

a machine frame, a plurality of guide rails and a plurality of guide rails,

the detection table is arranged on the frame and used for placing a cylinder cover to be detected,

a hold-down mechanism disposed on the frame, the hold-down mechanism capable of contacting and securing a cylinder head to a test table,

the detection mechanism is arranged on the rack and comprises a sealing mechanism and an inflation mechanism, the sealing mechanism corresponds to the position of a passage opening of an air passage and/or an oil passage and/or a water passage on the cylinder cover, the sealing mechanism can move relative to the detection platform and can be close to the cylinder cover and close the passage opening, the inflation mechanism is arranged on the sealing mechanism, the inflation mechanism is communicated with the passage opening and can inflate gas into the passage opening,

and the detection box is arranged on the frame, liquid is arranged in the detection box, and the detection box can move relative to the detection table to enable the cylinder cover to enter the detection box.

The utility model discloses a concrete implementation mode, sealing mechanism includes drive arrangement and the sealed piece of being connected with drive arrangement, sealed piece with the position of passway is corresponding, and sealed piece can be close to the cylinder head and seal in the relative test platform removal under drive arrangement's drive the passway.

The utility model discloses a concrete implementation mode, it includes intake pipe and inflation inlet to aerify the mechanism, the inflation inlet set up on sealed piece and with the passway intercommunication, intake pipe one end is connected with gas compression equipment, the other end with the inflation inlet intercommunication and can to the passway is inflated.

The utility model discloses a concrete implementation mode, detection mechanism is including being used for detecting first detection mechanism, second detection mechanism and the third detection mechanism of air flue, oil duct and the water course leakproofness on the cylinder cap respectively, first detection mechanism sets up in the top of examining the test table, second detection mechanism sets up in the both sides of examining the test table, third detection mechanism sets up at the back tip of examining the test table, first detection mechanism, second detection mechanism and third detection mechanism all include sealing mechanism and aerify the mechanism.

The utility model discloses a concrete implementation mode, first detection mechanism include first drive arrangement and the movable plate of being connected with first drive arrangement, be provided with first sealed piece on the movable plate, first sealed piece is located the top of cylinder head and corresponds with the position of the passway at cylinder head top, the movable plate moves and is close to the cylinder head to the relative detection platform under the drive of first drive arrangement, the passway at cylinder head top can be sealed to first sealed piece under the drive of movable plate; the first detection mechanism further comprises a first air inlet pipe and a first air inflation inlet, the first air inflation inlet is formed in the first sealing block and is communicated with the channel opening in the top of the cylinder cover, one end of the first air inlet pipe is connected with the gas compression device, and the other end of the first air inlet pipe is communicated with the first air inflation inlet and can be used for filling gas into the channel opening in the top of the cylinder cover.

The second detection mechanism comprises a second driving device and a second sealing block connected with the second driving device, the second sealing block is positioned at two sides of the cylinder cover and corresponds to the position of the passage opening at the side end of the cylinder cover, and the second sealing block can be driven by the first driving device to move relative to the detection platform to be close to the cylinder cover and can seal the passage opening at the side end of the cylinder cover; the second detection mechanism further comprises a second air inlet pipe and a second inflation inlet, the second inflation inlet is formed in the second sealing block and is communicated with the channel opening at the side end of the cylinder cover, one end of the second air inlet pipe is connected with the air compression device, and the other end of the second air inlet pipe is communicated with the second inflation inlet and can be used for inflating air into the channel opening at the side end of the cylinder cover.

The third sealing block is positioned at the rear end part of the cylinder cover and corresponds to the position of the passage opening at the rear end part of the cylinder cover, and the third sealing block can be driven by the first driving device to move relative to the detection platform to be close to the cylinder cover and can seal the passage opening at the rear end part of the cylinder cover; the third detection mechanism further comprises a third air inlet pipe and a third inflation inlet, the third inflation inlet is formed in the third sealing block and communicated with the channel opening in the rear end portion of the cylinder cover, one end of the third air inlet pipe is connected with the gas compression device, and the other end of the third air inlet pipe is communicated with the third inflation inlet so that gas can be filled into the channel opening in the rear end portion of the cylinder cover.

The utility model discloses a concrete implementation mode, hold-down mechanism is including compressing tightly actuating mechanism, pressure strip and compressing tightly the post, the pressure strip sets up the top at the cylinder head, compress tightly the top that the post setting just is located the cylinder head on the pressure strip, the pressure strip is connected with compressing tightly actuating mechanism and can move towards the cylinder head under compressing tightly actuating mechanism's drive, compress tightly the post and can contact and compress tightly the cylinder head under the drive of pressure strip.

The utility model discloses a concrete embodiment, the detection case below is provided with fourth drive arrangement, fourth drive arrangement is connected with the detection case and can drive the detection case and remove and make in can the cylinder head get into the detection case towards detecting the platform.

The utility model discloses a concrete implementation mode, it still is provided with the locating plate to examine test table, the cylinder head is placed on the locating plate.

The utility model discloses one of following beneficial effect has at least:

the air tightness detection device of the cylinder cover can detect the air tightness of the water channel, the air channel and the oil duct inside the cylinder cover, and after the water channel is detected, when the water channel is switched to the air channel and the oil duct, detection equipment does not need to be replaced or the position of the cylinder cover does not need to be moved, so that the detection time can be saved; the utility model discloses can also detect the gas tightness of the inside water course of cylinder head, air flue and oil duct simultaneously, detection efficiency is high. And simultaneously, the utility model discloses a detection rate of accuracy is high, detects convenience, simple.

Drawings

FIG. 1 is a schematic structural view of the cylinder head gas tightness detecting device of the present invention;

FIG. 2 is a schematic structural view of the cylinder head airtightness detection apparatus of the present invention, including a cylinder head;

FIG. 3 is a schematic view of a part of the structure of the cylinder head gas tightness detecting device of the present invention;

fig. 4 is a schematic view of a part of the compressing device of the present invention;

FIG. 5 is a schematic view of a part of the structure of the detecting device of the present invention;

FIG. 6 is a schematic view of a part of the structure of the detecting device of the present invention;

fig. 7 is a schematic view of a part of the structure of the detecting device in the present invention;

fig. 8 is a schematic structural diagram of a first sealing block in the present invention;

FIG. 9 is a schematic view of the internal structure of FIG. 8;

reference numerals: 1. a frame; 2. a detection table; 21. positioning a plate; 3. a hold-down mechanism; 31. a pressing drive mechanism; 32. a compression plate; 33. a compression post; 411. a first driving device; 412. moving the plate; 413. a first seal block; 414. a first intake pipe; 415. a first inflation port; 416. an air intake passage; 421. a second driving device; 422. a second seal block; 423. a second intake pipe; 424. a second inflation port; 431. a third driving device; 432. a third seal block; 433. a third intake pipe; 434. a third inflation port; 5. a detection box; 51. a fourth drive device; 6. a cylinder head; 60. a passage port.

Detailed Description

The present invention will be described in further detail with reference to the following specific examples, but the present invention is not limited to the following specific examples.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

The present embodiment provides a cylinder head sealability detection apparatus by which the airtightness of the cylinder head 6 is detected by the apparatus 10. In which the cylinder head 6 is manufactured.

The specific structure of the cylinder head 6 is as follows, the cylinder head 6 has a water passage inside and passage ports 60 provided at both ends of the water passage; also has an air passage and passage ports 60 provided at both ends of the air passage; and an oil passage and passage openings 60 provided at both ends of the oil passage, so that the cylinder head 6 has a plurality of passage openings 60, and the passage openings 60 are distributed at the top, the side ends, and both end surfaces of the cylinder head 6. The structure of the cylinder head 6 is well known to those skilled in the art and will not be described in detail in this embodiment.

Therefore, the cylinder head sealability detection apparatus in the present embodiment is used to detect the airtightness of the water passages, air passages, and oil passages inside the cylinder head 6.

As shown in fig. 1 to 9, the cylinder head tightness detection device in the present embodiment includes a frame 1, a detection table 2, a pressing mechanism 3, a detection mechanism, and a detection box 5.

The detection table 2 is arranged on the frame 1, in the embodiment, the detection table 2 is horizontally arranged, when detecting, the detection table 2 is used for placing the cylinder cover 6 to be detected, it can be understood that the detection table 2 is used for placing the cylinder cover 6, the detection table 2 is adapted to the bottom surface of the cylinder cover 6, so that the cylinder cover 6 is placed on the detection table 2 and can be fixed, and after the detection of the cylinder cover 6 on the detection table 2 is completed, the detection table can be manually replaced by an operator.

In the embodiment, the detection table 2 is further provided with a positioning plate 21, the cylinder cover 6 is placed on the positioning plate 21, and the cylinder cover 6 can be placed at a proper detection position through the positioning action of the positioning plate 21; and the position of the positioning plate 21 can be adjusted, specifically, the positioning plate 21 is mounted on the inspection table 2 by bolts.

The pressing mechanism 3 is arranged on the frame 1, and the pressing mechanism 3 can contact the cylinder cover 6 and fix the cylinder cover 6 on the detection table 2 so as to prevent the position of the cylinder cover 6 from moving during detection.

As shown in fig. 4, in the present embodiment, the pressing mechanism 3 includes a pressing driving mechanism 31, a pressing plate 32, and a pressing column 33, the pressing plate 32 is disposed above the cylinder head 6, the pressing column 33 is disposed on the pressing plate 32 and above the cylinder head 6, the pressing plate 32 is connected to the pressing driving mechanism 31 and can move toward the cylinder head 6 under the driving of the pressing driving mechanism 31, the pressing column 33 can contact and press the cylinder head 6 under the driving of the pressing plate 32, specifically, the number of the pressing columns 33 is an even number, and the pressing columns are symmetrically disposed around the pressing plate 32, so that the periphery of the cylinder head 6 can be fixed. It is worth mentioning that the position of the compression column 33 does not correspond to the position of the passage opening 60 of the water supply passage, the air passage and the oil passage of the cylinder head 6.

A detection tank 5 is provided on the housing 1, and a liquid, specifically, water, is disposed in the detection tank 5. In this embodiment, the detection box 5 is located below the detection table 2, and in other embodiments, the detection box 5 may also be located on two sides or front and rear ends of the detection table 2. A fourth driving device 51 in the vertical direction is arranged below the detection box 5, and the fourth driving device 51 is connected with the detection box 5 and can drive the detection box 5 to move up and down, so that the detection box 5 can move towards the detection table 2, and the cylinder cover 6 can enter the detection box 5 and be completely immersed in the liquid in the detection box 5.

The detection mechanism is arranged on the frame 1 and comprises a sealing mechanism and an inflation mechanism, the sealing mechanism corresponds to the positions of the passage openings 60 of the air passage, the oil passage and the water passage on the cylinder cover 6, the sealing mechanism can move relative to the detection table 2 and can be close to the cylinder cover 6 and close the passage openings 60, the inflation mechanism is arranged on the sealing mechanism, and the inflation mechanism is communicated with the passage openings 60 and can inflate gas into the passage openings 60.

Specifically, the sealing mechanism includes a driving device and a sealing block connected to the driving device, the sealing block corresponds to the position of the passage opening 60, and the sealing block can move relative to the detection table 2 under the driving of the driving device to approach the cylinder head 6 and close the passage opening 60. The inflation mechanism comprises an air inlet pipe and an inflation inlet, the inflation inlet is arranged on the sealing block and communicated with the channel port 60, one end of the air inlet pipe is connected with the gas compression equipment, and the other end of the air inlet pipe is communicated with the inflation inlet so as to be capable of inflating gas into the channel port 60.

Therefore, the water channel, the air channel and the oil channel in the cylinder head 6 can be filled with gas under certain pressure through the inflation mechanism and kept for a period of time, and the channel opening 60 of the water channel, the air channel and the oil channel is sealed through the sealing block on the sealing mechanism, so that the gas filled in the water channel, the air channel and the oil channel cannot flow out of the channel opening 60. Since the cylinder head 6 is completely immersed in the liquid in the detection box 5, if there is a leakage portion on the surface of the cylinder head 6, the gas inside the cylinder head 6 overflows from the leakage portion, and the operator can visually observe the generation of the bubble, and detect the airtightness of the cylinder head 6 based on the position and size of the bubble. At this time, the detection of the airtightness of the cylinder head 6 can be completed by visual observation.

In this embodiment, detection mechanism includes first detection mechanism, second detection mechanism and third detection mechanism, is used for detecting air flue, oil duct and the water course leakproofness on the cylinder cap 6 respectively, first detection mechanism sets up in the top of examining test table 2, second detection mechanism sets up in the both sides of examining test table 2, third detection mechanism sets up in the rear end portion of examining test table, first detection mechanism, second detection mechanism and third detection mechanism all include sealing mechanism and aerify the mechanism.

As shown in fig. 5, the first detection mechanism includes a first driving device 411 and a moving plate 412 connected to the first driving device 411, the moving plate 412 is provided with a first sealing block 413, the first sealing block 413 is located above the cylinder head 6 and corresponds to the position of the passage opening 60 at the top of the cylinder head 6, and the number of the first sealing blocks 413 is the same as the number of the passage openings 60 at the top of the cylinder head 6. The moving plate 412 can move up and down relative to the detection table 2 under the driving of the first driving device 411, so that the moving plate 412 can be close to the cylinder head 6, and the first sealing block 413 can contact the cylinder head 6 under the driving of the moving plate 412 and close the passage opening 60 at the top of the cylinder head 6.

The first detection mechanism further includes a first air inlet pipe 414 and a first air charging port 415, the first air charging port 415 is disposed on the first sealing block 413 and is communicated with the channel port 60 at the top of the cylinder head 6, specifically, the first air charging port 415 is disposed in the middle of the end portion of the first sealing block 413, an air inlet channel 416 is disposed inside the first sealing block 413, and the air inlet channel 416 is communicated with the first air charging port 415. One end of the first air inlet pipe 414 is connected to the gas compression device, and the other end of the first air inlet pipe 414 is communicated with the air inlet passage 416 inside the first sealing block 413, as shown in fig. 9, so that air can be introduced into the air inlet passage 416 inside the first sealing block 413 through the first air inlet pipe 414, and then the air enters the cylinder head 6 through the first air charging port 415 and the passage port 60 at the top of the cylinder head 6, and is kept for a certain time. If there is a leakage portion on the surface of the cylinder head 6, the gas inside the cylinder head 6 may overflow from the leakage portion, and the operator may detect the airtightness of the passage by visually observing the generation of bubbles.

As shown in fig. 6 to 7, the second detection mechanism includes a second driving device 421 and a second sealing block 422 connected to the second driving device 421, the second sealing block 422 is located on both sides of the cylinder head 6 and corresponds to the position of the passage opening 60 at the side end of the cylinder head 6, the second sealing block 422 can move left and right relative to the detection table 2 under the driving of the first driving device 421, and thus the second sealing block 422 can approach the cylinder head 6 and can close the passage opening 60 at the side end of the cylinder head 6.

The second detection mechanism further comprises a second air inlet pipe 423 and a second air charging port 424, the second air charging port 424 is arranged on the second sealing block 422 and is communicated with the channel port 60 at the side end of the cylinder head 6, one end of the second air inlet pipe 423 is connected with a gas compression device, and the other end of the second air inlet pipe 423 is communicated with the second air charging port 424 to be capable of charging gas into the channel port 60 at the side end of the cylinder head 6. It is worth mentioning that, the inside gas passage who is provided with second inflation inlet 424 intercommunication of second sealed piece 422, second intake pipe 423 one end is connected with gas compression equipment, the other end and the inside gas passage intercommunication of second sealed piece 422, thereby the gas in the second intake pipe 423 can pass through the inside gas passage of second sealed piece 422, second inflation inlet 424 gets into in the cylinder head 6, if there is the position of revealing on the cylinder head 6 surface, the inside gas of cylinder head 6 can be followed the part of revealing and spilled over, the operator can observe the production of bubble through naked eyes, can detect the gas tightness of this passageway.

As shown in fig. 6 to 7, the third detection mechanism includes a third driving device 431 and a third sealing block 432 connected to the third driving device 431, the third sealing block 432 is located at the rear end portion of the cylinder head 6 and corresponds to the position of the passage opening 60 at the rear end portion of the cylinder head 6, and the third sealing block 432 is movable relative to the detection table 2 to be close to the cylinder head 6 by the driving of the first driving device 431 and can close the passage opening 60 at the rear end portion of the cylinder head 6; the third detection mechanism further includes a third air inlet pipe 433 and a third air charging port 434, the third air charging port 434 is disposed on the third sealing block 432 and is communicated with the channel port 60 at the rear end of the cylinder head 6, one end of the third air inlet pipe 433 is connected with the gas compression device, and the other end of the third air inlet pipe 433 is communicated with the third air charging port 434 so as to be capable of charging gas into the channel port 60 at the rear end of the cylinder head 6. It is worth mentioning that a gas channel communicated with the third inflation port 434 is arranged inside the third sealing block 432, one end of the third gas inlet pipe 433 is connected with the gas compression device, the other end of the third gas inlet pipe is communicated with the gas channel inside the third sealing block 432, so that gas in the third gas inlet pipe 433 can enter the cylinder cover 6 through the gas channel inside the third sealing block 432 and the third inflation port 434, if the surface of the cylinder cover 6 has a leakage part, the gas inside the cylinder cover 6 can overflow from the leakage part, and an operator can detect the generation of bubbles through naked eyes, i.e. the gas tightness of the channel can be detected.

Therefore, the cylinder head airtightness detection device in the embodiment can detect the airtightness of the water channel, the air channel and the oil channel inside the cylinder head, and compared with the detection device in the prior art, only one channel can be detected, and the position of the cylinder head needs to be changed or moved when the other channel is detected.

The embodiment also provides a method for detecting the airtightness of the cylinder cover by the device, which comprises the following steps:

placing the cylinder head 6 to be detected on the detection table 2, specifically, on the positioning plate 21;

starting the pressing mechanism 3, and moving the pressing mechanism 3 relative to the cylinder cover 6 to fix the cylinder cover 6 on the detection table 2; specifically, the pressing plate 32 is driven by the pressing driving mechanism 31 to move towards the cylinder head 6, and the pressing column 33 is driven by the pressing plate 32 to contact and press the cylinder head 6 so as to fix the cylinder head 6 on the detection table 2;

starting the gas compression equipment, checking the exhaust conditions of the gas inlet pipe and the gas charging port, and if the exhaust is normal and not blocked, respectively starting the first detection mechanism, the second detection mechanism and the third detection mechanism to respectively detect the gas passage, the oil passage and the water passage in the cylinder cover 6; the method specifically comprises the following steps: starting the first driving device 411, driving the moving plate 412 to move relative to the cylinder head 6 by the first driving device 411, moving the first sealing block 413 along with the moving plate 412 to contact the top of the cylinder head 6 and close the passage port 60 at the top of the cylinder head 6, and filling gas into the passage port 60 at the top of the cylinder head 6 through the first gas inlet pipe 414 and the first gas filling port 415 and keeping for a period of time;

filling liquid into the detection box 5, moving the detection box 5 relative to the detection table 2 to enable the cylinder cover 6 to enter the detection box 5 and sink into the liquid in the detection box 5, specifically, opening the fourth driving device 51, and driving the detection box 5 to move towards the detection table 2 by the fourth driving device 51 to enable the cylinder cover 6 to sink into the liquid in the detection box 5;

if there is a leakage portion on the surface of the cylinder head 6, the gas inside the cylinder head 6 overflows from the leakage portion, bubbles are generated in the liquid in the detection box 5, and the operator can detect the airtightness of the passage by visually observing the generation of the bubbles.

Similarly, the above process is repeated, the second driving device 421 is opened, the second driving device 421 drives the second sealing block 422 to move relative to the cylinder head 6, the second sealing block 422 contacts two sides of the cylinder head 6 and closes the passage openings 60 on two sides of the cylinder head 6, and gas is filled into the passage openings 60 on two sides of the cylinder head 6 through the second air inlet pipe 423 and the second air filling port 424 and is kept for a period of time; the detection box 5 moves relative to the detection table 2, so that the cylinder cover 6 enters the detection box 5 and is immersed in the liquid in the detection box 5; if there is a leakage portion on the surface of the cylinder head 6, the gas inside the cylinder head 6 overflows from the leakage portion, bubbles are generated in the liquid in the detection box 5, and the operator can detect the airtightness of the passage by visually observing the generation of the bubbles.

Similarly, the above process is repeated, the third driving device 431 is opened, the third driving device 431 drives the third sealing block 432 to move relative to the cylinder head 6, the third sealing block 432 contacts two sides of the cylinder head 6 and seals the passage ports 60 on two sides of the cylinder head 6, and gas is filled into the passage ports 60 on the rear end surface of the cylinder head 6 through the third air inlet pipe 433 and the third air filling port 434 and is kept for a period of time; the detection box 5 moves relative to the detection table 2, so that the cylinder cover 6 enters the detection box 5 and is immersed in the liquid in the detection box 5; if there is a leakage portion on the surface of the cylinder head 6, the gas inside the cylinder head 6 overflows from the leakage portion, bubbles are generated in the liquid in the detection box 5, and the operator can detect the airtightness of the passage by visually observing the generation of the bubbles.

Therefore, the cylinder cover air tightness detection device in the embodiment can detect the air tightness of the water channel, the air channel and the oil channel inside the cylinder cover 6 respectively, and can also detect the air tightness of the water channel, the air channel and the oil channel inside the cylinder cover 6 simultaneously, the detection is convenient and simple, when one channel is detected, the position of the cylinder cover 6 does not need to be moved again when another channel is detected, so that the detection time can be saved, and the detection efficiency is high.

The above are merely examples of the features of the present invention, and do not limit the scope of the present invention. All technical solutions formed by adopting equivalent exchanges or equivalent replacements fall within the protection scope of the present invention.

Claims

1. A cylinder head airtightness detection apparatus is characterized by comprising:

a machine frame (1),

a detection table (2) arranged on the frame (1), the detection table (2) is used for placing a cylinder cover (6) to be detected,

a pressing mechanism (3) arranged on the frame (1), wherein the pressing mechanism (3) can contact the cylinder cover (6) and fix the cylinder cover (6) on the detection table (2),

the detection mechanism is arranged on the frame (1), the detection mechanism comprises a sealing mechanism and an inflation mechanism, the sealing mechanism corresponds to the position of a passage opening (60) of an upper air passage and/or an oil passage and/or a water passage of the cylinder cover (6), the sealing mechanism can move relative to the detection platform (2) and can be close to the cylinder cover (6) and close the passage opening (60), the inflation mechanism is arranged on the sealing mechanism, the inflation mechanism is communicated with the passage opening (60) and can inflate gas into the passage opening (60),

and the detection box (5) is arranged on the frame (1), liquid is arranged in the detection box (5), and the detection box (5) can move relative to the detection table (2) to enable the cylinder cover (6) to enter the detection box (5).

2. A cylinder head tightness detection device according to claim 1, characterized in that said sealing mechanism comprises a driving device and a sealing block connected to the driving device, said sealing block corresponding to the position of said passage opening (60) and being movable with respect to the detection table (2) under the driving of the driving device to approach the cylinder head (6) and close said passage opening (60).

3. The cylinder head airtightness detection apparatus according to claim 2, wherein the inflation mechanism includes an intake pipe and an inflation port, the inflation port is provided on the seal block and communicates with the passage port (60), one end of the intake pipe is connected to a gas compression device, and the other end communicates with the inflation port so as to be able to inflate the passage port (60) with gas.

4. The cylinder head airtightness detection apparatus according to claim 1, wherein the detection mechanism includes a first detection mechanism, a second detection mechanism and a third detection mechanism for detecting airtightness of an air passage, an oil passage and a water passage on the cylinder head (6), respectively, the first detection mechanism is disposed above the detection table (2), the second detection mechanism is disposed on both sides of the detection table (2), the third detection mechanism is disposed at a rear end portion of the detection table, and each of the first detection mechanism, the second detection mechanism and the third detection mechanism includes a sealing mechanism and an inflation mechanism.

5. The cylinder head airtightness detection apparatus according to claim 4, wherein the first detection mechanism comprises a first driving device (411) and a moving plate (412) connected to the first driving device (411), a first sealing block (413) is disposed on the moving plate (412), the first sealing block (413) is located above the cylinder head (6) and corresponds to the position of the passage opening (60) at the top of the cylinder head (6), the moving plate (412) moves relative to the detection table (2) to be close to the cylinder head (6) under the driving of the first driving device (411), and the first sealing block (413) can close the passage opening (60) at the top of the cylinder head (6) under the driving of the moving plate (412); the first detection mechanism further comprises a first air inlet pipe (414) and a first air charging port (415), the first air charging port (415) is arranged on the first sealing block (413) and communicated with a channel port (60) in the top of the cylinder cover (6), one end of the first air inlet pipe (414) is connected with a gas compression device, and the other end of the first air inlet pipe is communicated with the first air charging port (415) so that gas can be charged into the channel port (60) in the top of the cylinder cover (6).

6. The cylinder head airtightness detection apparatus according to claim 4, wherein the second detection mechanism includes a second drive device (421) and a second seal block (422) connected to the second drive device (421), the second seal blocks (422) being located on both sides of the cylinder head (6) and corresponding to positions of the passage openings (60) at the side end of the cylinder head (6), the second seal blocks (422) being movable, driven by the first drive device (411), relative to the detection table (2) so as to be close to the cylinder head (6) and being capable of closing the passage openings (60) at the side end of the cylinder head (6); the second detection mechanism further comprises a second air inlet pipe (423) and a second air charging port (424), the second air charging port (424) is arranged on the second sealing block (422) and is communicated with a channel port (60) at the side end of the cylinder cover (6), one end of the second air inlet pipe (423) is connected with a gas compression device, and the other end of the second air inlet pipe is communicated with the second air charging port (424) to charge gas into the channel port (60) at the side end of the cylinder cover (6).

7. The cylinder head airtightness detection apparatus according to claim 4, wherein the third detection mechanism includes a third drive device (431) and a third seal block (432) connected to the third drive device (431), the third seal block (432) is located at the rear end portion of the cylinder head (6) and corresponds to the position of the passage opening (60) at the rear end portion of the cylinder head (6), and the third seal block (432) is movable relative to the detection table (2) to be close to the cylinder head (6) by the drive of the first drive device (411) and is capable of closing the passage opening (60) at the rear end portion of the cylinder head (6); the third detection mechanism further comprises a third air inlet pipe (433) and a third air charging port (434), the third air charging port (434) is arranged on the third sealing block (432) and is communicated with a channel port (60) at the rear end of the cylinder cover (6), one end of the third air inlet pipe (433) is connected with a gas compression device, and the other end of the third air inlet pipe is communicated with the third air charging port (434) so as to be capable of charging gas into the channel port (60) at the rear end of the cylinder cover (6).

8. The cylinder head airtightness detection apparatus according to claim 1, wherein the pressing mechanism (3) includes a pressing drive mechanism (31), a pressing plate (32), and a pressing column (33), the pressing plate (32) is disposed above the cylinder head (6), the pressing column (33) is disposed on the pressing plate (32) and above the cylinder head (6), the pressing plate (32) is connected to the pressing drive mechanism (31) and can be moved toward the cylinder head (6) by the driving of the pressing drive mechanism (31), and the pressing column (33) can contact and press the cylinder head (6) by the driving of the pressing plate (32).

9. The cylinder head airtightness detection apparatus according to claim 1, wherein a fourth drive device (51) is provided below the detection box (5), and the fourth drive device (51) is connected to the detection box (5) and can drive the detection box (5) to move toward the detection table (2) so that the cylinder head (6) can enter the detection box (5).

10. The cylinder head tightness detection device according to claim 1, wherein a positioning plate (21) is further disposed on the detection table (2), and the cylinder head (6) is placed on the positioning plate (21).