Marine diesel engine cylinder cover flexibility automatic water tightness inspection equipment

Abstract

The invention discloses a marine diesel engine cylinder cover flexibility automatic water tightness inspection device, which determines the boundary dimension of a marine cylinder cover and a sealing hole required for sealing a cylinder cover unit, selects a corresponding sealing bottom plate and a corresponding top plate to be consistent with the cylinder cover to be sealed, lifts the cylinder cover to a position right above the sealing bottom plate and slowly places the cylinder cover downwards on the sealing bottom plate. The connecting rod turnover device drives the sealing top plate to turn over to the position over the cylinder cover, the sealing top plate conducts error compensation through the position compensation device, the air cylinder pressing device presses the current position of the sealing top plate, and the jacking device synchronously drives the cylinder cover to slowly ascend to make contact with the sealing top plate to conduct a water tightness test. The connecting rod overturning device is overturned to the initial position, the cylinder cover unit is hoisted again, and the jacking device drives the sealing low plate to return to the initial mounting position; according to the invention, the water tightness test of marine diesel engine cylinder covers of various models can be satisfied, and the automation degree and the assembly efficiency of the assembly process are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to a flexible automatic water tightness inspection equipment and operation method, in particular to a flexible automatic water tightness inspection equipment and operation method for marine diesel engine cylinder unit, and belongs to the technical field of assembly. BACKGROUND

[0002] The cylinder unit is one of the important parts of the marine diesel engine, and its sealing performance is an important indicator of the cylinder cover. Since the cylinder cover needs to withstand a large combustion pressure during operation, the temperature distribution is uneven, and the structure of the cylinder cover is relatively complex, therefore the material and structural size of the cylinder cover should ensure sufficient sealing performance. At present, the sealing of the marine diesel engine cylinder unit mainly relies on manual operation. Due to the complex internal structure and surface shape, large weight and large volume, the labor intensity of the operator is large, and such high-intensity work not only has safety problems, but also greatly reduces the sealing efficiency and accuracy.

[0003] The Chinese invention patent with application number 202211456100 discloses a cylinder cover water tightness test tool device, which adopts a sealing device designed on the air inlet support bottom plate to seal the corresponding sealing hole of the cylinder cover. The air tightness is inspected by putting it into hot water, and the sealing performance is judged by observing whether there are bubbles in the water. However, this sealing performance test needs to be sealed manually, and can only be tested for specific cylinder covers, which cannot meet the needs of different series of cylinder unit.

[0004] The Chinese invention patent with application number 202110591883 discloses a cylinder cover air tightness detection device, which adopts a cylinder to press the cylinder cover, and the sealing mechanism is one-to-one corresponding and sealing with the sealing hole on the cylinder cover. The inflation mechanism injects gas into the cylinder cover to perform cylinder cover sealing inspection. However, this device only realizes the sealing inspection of the cylinder, but still needs to rely on manual operation, which cannot meet the needs of different series of cylinder unit. SUMMARY

[0005] The present application provides a flexible automatic water tightness inspection equipment for marine diesel engine cylinder, which overcomes the shortcomings of traditional sealing inspection equipment for marine diesel engine cylinder unit, and adopts a connecting rod overturning device, an overturning sealing clamp, a positioning device, a jacking device and a sealing device, greatly improving the automation degree of the water sealing inspection process and reducing the labor intensity of the operator.

[0006] In order to achieve the above purpose, the present application adopts the following technical scheme:

[0007] The flexible automatic water tightness inspection equipment for marine diesel engine cylinder cover of the present application comprises:

[0008] A water tightness workbench is placed on the ground to support the entire tooling, and the diesel engine cylinder cover is installed therein.

[0009] The flip seal clamp is located at the side of the water-tight workbench and is used for positioning between the double-layer diesel engine cylinder head;

[0010] The sealing top plate is located at the top of the water-tight workbench and is used for positioning on the top surface of the diesel engine cylinder head and sealing the holes;

[0011] The connecting rod flip device is located at the side of the water-tight workbench and is used for driving the sealing top plate to flip, so as to open and close the top of the water-tight workbench;

[0012] The cylinder head tray is located at the inner bottom of the water-tight workbench and is used for positioning on the bottom surface of the diesel engine cylinder head and sealing the holes;

[0013] The jacking device is located at the lower part of the cylinder head tray and drives the cylinder head tray to rise, so as to position the diesel engine cylinder head together with the sealing top plate, realize clamping of the diesel engine cylinder head and sealing of the holes;

[0014] The telescopic sealing side plate is located at the side of the water-tight workbench and is used for sealing the holes on the side surface of the diesel engine cylinder head.

[0015] As a further preferred solution, the flip seal clamp comprises a first connecting rod, a first telescopic cylinder, a support base, a second connecting rod, a sealing clamp, a first sealing gasket and a guide column;

[0016] The support base is fixed to the outside of the side of the water-tight workbench, and the first telescopic cylinder is fixed to the upper part, and the piston rod thereof moves horizontally; the second connecting rod is in a "L" structure, and the bending structure thereof is a hinge point and is hinged to the support base; the second connecting rod is connected to the first telescopic cylinder through the first connecting rod, one end of the first connecting rod is hinged to one end of the second connecting rod, the other end of the first connecting rod is hinged to the piston rod of the first telescopic cylinder, and the other end of the second connecting rod is fixedly connected to the sealing clamp; the inner ring of the sealing clamp is provided with the first sealing gasket, the first sealing gasket is embedded in the cylinder head sealing groove corresponding to the two diesel engine cylinder heads, and two guide columns are further arranged on the sealing clamp and are used for being inserted into the cylinder head positioning holes of the diesel engine cylinder head.

[0017] As a further preferred solution, the sealing top plate comprises a top plate body, and a cylinder head upper telescopic guide column, a through hole, a cylinder head upper sealing telescopic plug, and a connecting rod overturning sealing device arranged on the top plate body; the cylinder head upper telescopic guide column corresponds to a cylinder head positioning hole on the top of the cylinder head of the diesel engine; the through hole is for the guide rod on the top of the cylinder head of the diesel engine to pass through, so as to avoid interference; the cylinder head upper sealing telescopic plug is used to block the cylinder head sealing hole on the top surface of the cylinder head of the diesel engine; the connecting rod overturning sealing device is used to block the sealing hole on the side of the cylinder head of the diesel engine, and the connecting rod overturning sealing device comprises a support device, a second telescopic cylinder, a third connecting rod, a fourth connecting rod, and a sealing plug; the support device is located on the top plate body, the second telescopic cylinder is installed on the support device, and the piston rod of the second telescopic cylinder moves horizontally; the third connecting rod is in a "L" structure, one end of the third connecting rod is hinged to the piston rod, the other end of the third connecting rod is hinged to the support device, the fourth connecting rod is fixedly connected to the end of the third connecting rod hinged to the support device, overturning is realized, and the sealing plug is located at the end of the fourth connecting rod to block the cylinder head sealing hole on the side of the cylinder head of the diesel engine.

[0018] As a further preferred solution, the bottom of the top plate body of the sealing top plate is detachably provided with an upper sealing sleeve, the upper sealing sleeve is in a cover structure with an open lower part, an electromagnetic chuck is arranged on the top plate body, a connector corresponding to the electromagnetic chuck is arranged on the upper sealing sleeve to realize quick positioning and connection, the edge of the cover structure is a second sealing gasket, and the second sealing gasket is embedded in the corresponding cylinder head sealing groove on the top of the cylinder head of the diesel engine.

[0019] As a further preferred solution, a telescopic sealing side plate is arranged on each side of the water-tight workbench, and is used for sealing the side sealing holes of the double-layer cylinder head of the diesel engine; the telescopic sealing side plate comprises a support plate fixed on the water-tight workbench, and a third telescopic cylinder on the support plate; the piston rod of the third telescopic cylinder moves horizontally, the end of the piston rod is a moving plate, the moving plate is provided with a sealing block and a first sealing pin; the sealing block is used for synchronous sealing of the side sealing holes of the double-layer cylinder head of the diesel engine, and the first sealing pin is used for synchronous positioning of the pin holes on the side of the double-layer cylinder head of the diesel engine.

[0020] As a further preferred scheme, a connecting rod overturning device is arranged on each side of the water-tight workbench, and the connecting rod overturning device comprises a fourth telescopic cylinder, a limiting column, a connecting rod positioning column, a fifth connecting rod, a sliding block, a sixth connecting rod and a connecting rod support frame; the fifth connecting rod is rotationally connected to the side of the water-tight workbench through the connecting rod positioning column, the fourth telescopic cylinder is rotationally connected to the side of the water-tight workbench, the piston rod of the fourth telescopic cylinder is rotationally connected to the lower end of the fifth connecting rod, a horizontal rod is further arranged at the bottom of the water-tight workbench, the lower end of the sixth connecting rod is sleeved on the horizontal rod for rotation, the upper end is connected to the connecting rod support frame, the sealing top plate is located on the connecting rod support frame, the sixth connecting rod is provided with the sliding block moving along the sixth connecting rod, and the upper end of the fifth connecting rod is rotationally connected to the sliding block; the limiting column is further arranged on the side of the water-tight workbench to avoid excessive pushing of the lower part of the fifth connecting rod by the fourth telescopic cylinder.

[0021] A position compensation device is arranged between the sealing top plate and the connecting rod support frame for fine adjustment of the position of the sealing top plate in the plane direction.

[0022] As a further preferred scheme, the jacking device comprises a jacking cylinder, the upper part of the jacking cylinder is a support connecting plate, the jacking cylinder drives the support connecting plate to rise and fall through the piston rod, a guide shaft is further arranged between the bottom of the support connecting plate and the bottom of the water-tight workbench, a positioning pin is arranged on the upper surface of the support connecting plate for installation with the cylinder cover tray;

[0023] A recess is formed on the cylinder cover tray for installing the water injection pipe, the bottom of the cylinder cover tray is positioned by the positioning pin, a cylinder cover sealing bottom plate is installed on the cylinder cover tray, and the cylinder cover tray is provided with a cylinder cover tray guide column which is in butt joint with the cylinder cover sealing bottom plate.

[0024] As a further preferred scheme, the upper surface of the cylinder cover sealing bottom plate is provided with a cylinder cover lower part sealing telescopic plug, a cylinder cover lower part telescopic guide column and a valve guide sleeve through hole;

[0025] The cylinder cover lower part telescopic guide column corresponds to a cylinder cover positioning hole at the bottom of the diesel engine cylinder cover;

[0026] The valve guide sleeve through hole corresponds to a valve guide sleeve at the bottom of the diesel engine cylinder cover;

[0027] The cylinder cover lower part sealing telescopic plug is used for plugging a cylinder cover sealing hole at the bottom of the diesel engine cylinder cover;

[0028] A cylinder cover water injection pipe opening is further arranged on the cylinder cover sealing bottom plate and corresponds to the water injection pipe, and the cylinder cover water injection pipe opening is connected with a sealing hole of the diesel engine cylinder cover.

[0029] As a further preferred scheme, the upper surface of the cylinder cover sealing bottom plate is provided with a lower sealing sleeve, the lower sealing sleeve is a cover structure with an upper opening, the cylindrical base at the lower part of the cylinder cover is installed in the lower sealing sleeve, the lower sealing sleeve is provided with a water injection port, the cylinder cover sealing bottom plate is further provided with a guide column corresponding to the cylinder cover positioning hole at the bottom of the cylinder cover, the edge of the cover structure is a sealing gasket, and the sealing gasket is used to be embedded in the corresponding cylinder cover sealing groove at the bottom of the diesel engine cylinder.

[0030] As a further preferred scheme, the water-tight workbench is further provided with a pressing device, and the pressing device is used to press down the sealing top plate to ensure the stability thereof.

[0031] Compared with the prior art, the marine diesel engine cylinder flexible automatic water-tightness inspection equipment has the following beneficial effects:

[0032] 1. The marine diesel engine cylinder flexible automatic water-tightness inspection equipment rationally divides different stations, and a sealing bottom plate is designed, so that the sealing bottom plate can adapt to the sealing of the bottom surfaces of various cylinder covers through different positions and sizes of sealing expansion pins on the sealing bottom plate.

[0033] 2. The sealing top plate is matched with the connecting rod turnover device, error compensation is performed on the positioning device on the sealing top plate through the compensation mechanism, and the sealing property of the cylinder cover is improved.

[0034] 3. The sealing top plate is provided with a plurality of through holes, when the top surface of the cylinder cover is closely combined with the sealing top plate, valve guide sleeves, guide rods and other parts can be extended out of the through holes, and the top surfaces of various cylinder covers can be sealed.

[0035] 4. When the sealing hole of the cylinder cover is on the lower end cylindrical surface, the sealing hole is sealed by the lower end surface of the cylinder cover through the special sealing bottom plate, and manual plugging is replaced, so that the labor intensity of workers is reduced.

[0036] 5. The jacking, sealing and positioning of the marine diesel engine cylinder unit are separated from traditional manual operation, manual intervention is reduced during assembly, the labor intensity is reduced, the automation degree is greatly improved, and the assembly precision is improved.

[0037] 6. During the water-tightness test of the cylinder cover, manual sealing of the sealing hole is not required, a mechanical automatic sealing mode is adopted, manual labor intensity is reduced, test data is displayed in real time on the operation screen, and manual checking is facilitated. BRIEF DESCRIPTION OF DRAWINGS

[0038] Figure 1 is an enlarged structural schematic view of the cylinder cover A1;

[0039] Figure 2 is a top view of Figure 1 ;

[0040] Figure 3 is an enlarged structural schematic view of the cylinder cover A2;

[0041] Figure 4 is a structural enlarged schematic view of the cylinder head A3;

[0042] Figure 5 is a structural enlarged schematic view of the cylinder head A4;

[0043] Figure 6 is a structural enlarged schematic view of the flexible automatic water-tightness inspection structure of the marine diesel engine cylinder head of the present application;

[0044] Figure 7 is a structural enlarged schematic view of the cross-section; Figure 6

[0045] Figure 8 is a structural enlarged schematic view of the cross-section; Figure 7

[0046] Figure 9 is a structural enlarged schematic view of the working state of the flip seal clamp sealing the double-layer A2 cylinder head;

[0047] Figure 10 is a structural enlarged schematic view of the cross-section; Figure 7

[0048] Figure 11 is a structural enlarged schematic view of the cross-section; Figure 10

[0049] Figure 12 is a structural enlarged schematic view of the working state of the seal top plate sealing the A2 cylinder head;

[0050] Figure 13 is a structural enlarged schematic view of the cross-section; Figure 10

[0051] Figure 14 is a structural enlarged schematic view of the working state of the seal top plate sealing the A3 cylinder head;

[0052] Figure 15 is a structural enlarged schematic view of the cross-section; Figure 7

[0053] Figure 16 is a structural enlarged schematic view of the cross-section; Figure 7

[0054] Figure 17 is a structural enlarged schematic view of the cross-section; Figure 7

[0055] Figure 18 is a structural enlarged schematic view of the cross-section; Figure 7

[0056] Figure 19 ​​​​​​​​​is Figure 7 Sealing bottom plate structure of A1 cylinder head

[0057] Figure 20 is Figure 17 Sealing telescopic pin preliminary structure of A1 cylinder head

[0058] Figure 21 is Figure 17 Sealing telescopic pin working structure of A1 cylinder head

[0059] Figure 22 is Sealing bottom plate structure of A3 cylinder head

[0060] Figure 23 is Sealing bottom plate structure of A4 cylinder head

[0061] Figure 24 is Sealing top plate sealing A1 cylinder head overhead structure enlarged schematic view

[0062] Figure 25 is Sealing top plate sealing A3 cylinder head overhead structure enlarged schematic view

[0063] Figure 26 is Sealing top plate sealing A4 cylinder head overhead structure enlarged schematic view

[0064] Figure 27 is A1 cylinder head to be subjected to water tightness test working state enlarged schematic view

[0065] Figure 28 is A2 cylinder head to be subjected to water tightness test working state enlarged schematic view

[0066] Figure 29 is A3 cylinder head to be subjected to water tightness test working state enlarged schematic view

[0067] Figure 30 is A4 cylinder head to be subjected to water tightness test working state enlarged schematic view

[0068] A1-1. A1 cylinder head sealing hole one; A1-2. A1 cylinder head guide rod; A1-3. A1 cylinder head valve guide sleeve; A1-4. A1 cylinder head positioning hole; A1-5. A1 cylinder head sealing hole two

[0069] A2-1. A2 cylinder head sealing hole one; A2-2. A2 cylinder head positioning hole; A2-3. A2 cylinder head valve guide sleeve; A2-4. A2 cylinder head sealing hole two; A2-5. Cylinder head sealing groove

[0070] A3-1. A3 cylinder head sealing hole one; A3-2. A3 cylinder head valve guide sleeve; A3-3. A3 cylinder head guide rod; A3-4. A3 cylinder head sealing hole two; A3-5. A3 cylinder head positioning hole;

[0071] A4-1. A4 cylinder head sealing hole one; A4-2. A4 cylinder head guide rod; A4-3. A4 cylinder head valve guide sleeve; A4-4. A4 cylinder head sealing hole two; A4-5. A4 cylinder head positioning hole;

[0072] 1. Water-tight workbench; 2. Pressing device; 3. Position compensation device; 4. Flip sealing clamp; 5. Sealing top plate; 6. Control screen; 7. Telescopic sealing side plate; 8. Connecting rod flip device; 9. Jacking device; 10. Cylinder head tray; 11. A1, A2 cylinder head sealing bottom plate; 12. A3 cylinder head sealing bottom plate; 13. A4 cylinder head sealing bottom plate; 4-1. First connecting rod; 4-2. First telescopic cylinder; 4-3. Support base; 4-4. Second connecting rod; 4-5. Sealing clamp; 4-6. First sealing washer; 4-7. A2 guide column;

[0073] 5-1. A1, A3 cylinder head upper telescopic guide column; 5-2. No. 1 through hole; 5-3. No. 2 through hole; 5-4. Electromagnetic chuck; 5-5. A4 cylinder head upper telescopic guide column; 5-6. A3 cylinder head upper telescopic guide column; 5-7. A4 cylinder head upper sealing telescopic plug; 5-8. Connecting rod flip sealing device; 5-9. No. 3 through hole; 5-10. Second sealing washer; 5-11. A2 upper sealing sleeve; 5-12. Connector; 5-13. A1 cylinder head upper sealing telescopic plug 5-8-1. Support device; 5-8-2. Second telescopic cylinder; 5-8-3. Third connecting rod; 5-8-4. Fourth connecting rod; 5-8-5. Sealing plug;

[0074] 7-1. Third telescopic cylinder; 7-2. Support plate; 7-3. Sealing block; 7-4. First sealing pin

[0075] 8-1. Fourth telescopic cylinder; 8-2. Limiting column; 8-3. Connecting rod positioning column; 8-4. Fifth connecting rod; 8-5. Slide block; 8-6. Sixth connecting rod; 8-7. Connecting rod support frame

[0076] 9-1. Positioning pin; 9-2. Jacking cylinder; 9-3. Guide shaft; 9-4. Support connecting plate 10-1. Cylinder head tray guide column; 10-2. Water injection pipe; 10-2-1. A2 cylinder head water injection pipe opening; 10-2-2; A1 cylinder head water injection pipe opening 11-1. A2 cylinder head lower sealing telescopic plug; 11-2. A2 valve guide sleeve through hole; 11-3. A1 cylinder head lower telescopic guide column; 11-4. A2 cylinder head lower telescopic guide column; 11-5. A1 cylinder head lower sealing telescopic plug; 11-6. Cylinder head sealing bottom plate positioning hole;

[0077] 11-3-1. Sealing pin; 11-3-2. Spring; 11-3-3. Fixed seat

[0078] 12-1. A3 lower sealing sleeve; 12-2. Third sealing washer; 12-3. A3 guide column; 12-4. A3 water injection opening; 12-5. A3 cylinder head sealing bottom plate positioning hole;

[0079] 13-1. A4 guide column; 13-2. A4 lower sealing sleeve; 13-3. Fourth sealing washer; 13-4. A4 water injection opening; 13-5. A4 cylinder head sealing bottom plate positioning hole; DETAILED DESCRIPTION

[0080] The technical solutions in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all.

[0081] Referring to Figures 1-5 , it is the structure diagram of four different series of marine diesel engine cylinder heads A1, A2, A3 and A4, which are left-right symmetrical structures and are the main assembly objects of the present application, wherein, Figures 1-2 The marine diesel engine cylinder head A1 shown in the figure, the bottom is four A1 cylinder head sealing holes two A1-5 which need to be sealed for water tightness test of the cylinder head, the four sealing holes are evenly distributed on the bottom surface of the cylinder head, an A1 cylinder head sealing hole one A1-1 needs to be sealed above the A1 cylinder head, two A1 cylinder head guide rods A1-2 and four A1 cylinder head valve guides A1-3 are assembled on the cylinder head, and four A1 cylinder head positioning holes A1-4 are evenly distributed around the cylinder head. Figure 3 The marine diesel engine cylinder head A2 shown in the figure, the four A2 cylinder head sealing holes two A2-4 needed to be sealed for water tightness test are distributed on the top surface of the cylinder head A2, the side A2 cylinder head sealing hole one is A2-1, two A2 cylinder head valve guides A2-3 are assembled on the top surface of the cylinder head, and eight A2 cylinder head positioning holes A2-2 are evenly distributed around the cylinder head. Figure 4The shown marine diesel engine cylinder head A3, appearance and A1 cylinder head similar, the top of the cylinder head is equipped with two A3 cylinder head guide rods A3-3 and four A3 cylinder head valve guide sleeves A3-2 which are symmetrical on the left and right, the water-tight holes which need to be sealed are A3 cylinder head sealing hole one A3-1 and A3 cylinder head sealing hole two A3-4, A3 cylinder head sealing hole one A3-1 is distributed on the inclined side surface of the cylinder head, A3 cylinder head sealing hole two A3-4 is evenly distributed on the cylindrical side surface below the cylinder head, and four A3 cylinder head positioning holes A3-5 are evenly distributed around the cylinder head. Figure 5 The shown marine diesel engine cylinder head A4, the sealing holes which need to be sealed for water-tightness test are A4 cylinder head sealing hole one A4-1 and A4 cylinder head sealing hole two A4-4, A4 cylinder head sealing hole one A4-1 is distributed on the top surface of the cylinder head, A4 cylinder head sealing hole two A4-4 is evenly distributed on the cylindrical side surface below the cylinder head, the cylinder head is equipped with two A4 cylinder head guide rods A4-2 and four A4 cylinder head valve guide sleeves A4-3 which are symmetrically distributed on the left and right, and four A4 cylinder head positioning holes A4-5 are evenly distributed around the cylinder head.

[0082] During assembly, the cylinder head unit needs to be hoisted onto the water-tightness test workbench for water-tightness test. Since the present application can meet the above water-tightness test of various marine diesel engine cylinder heads, the assembly content and test method are the same, therefore, the specific working mode of the present application is described as follows. Figure 1 The shown marine diesel engine cylinder head A1 is taken as an example, and other cylinder heads will be supplemented if there is a separate sealing test device.

[0083] Referring to Figures 6-7As shown, the marine diesel engine cylinder head flexible automatic water tightness test tool includes a water tightness workbench 1, a pressing device 2, a position compensation device 3, a turnover sealing clamp 4, a sealing top plate 5, a control screen 6, a telescopic sealing side plate 7, a connecting rod turnover device 8, a jacking device 9, a cylinder head tray 10, A1, A2 cylinder head sealing bottom plate 11, the water tightness workbench 1 is horizontally placed on the ground, supporting the whole tool, which is symmetrically arranged along the center point left and right, front and back. Two clamping devices 2 are symmetrically distributed above and left and right of the water tightness workbench 1, the control screen 6 is distributed on the right side of the water tightness workbench 1, the turnover sealing clamp 4 is placed between the two cylinder heads A2 connection, ensuring the sealing of the cylinder head connection, and the telescopic sealing side plates 7 symmetrically distributed on the left and right sides simultaneously seal the sealing holes A2-1 on the side of the cylinder head A2. The connecting rod turnover device 8 is symmetrically distributed inside the water tightness workbench 1, the turnover sealing clamp 4 is placed on the back side of the sealing bottom plate 11, the clamp is circular, the circular guide column is symmetrically distributed on the left and right sides of the clamp, the sealing top plate 5 is assembled on the connecting rod turnover device 8 through the position compensation device 3, and the connecting rod turnover device 8 can drive the sealing top plate 5 to rotate around the center axis in the front-back direction in the vertical plane, the connecting rod turnover device drives the sealing top plate to seal the sealing hole above the cylinder head, the jacking device 9 is located at the center position inside the water tightness workbench 1, the cylinder head tray 10 is placed above the jacking device 9, and the assembly is completed by cooperating with the positioning pin on the top of the jacking device 9. The jacking device drives the sealing bottom plate to make the cylinder head slowly rise and closely contact with the sealing top plate, four through holes are opened on the sealing bottom plate 11 and correspond to the guide columns on the cylinder head tray 10, and the sealing bottom plate 11 is placed above the cylinder head tray 10, the assembly of the sealing bottom plate 11 is completed, the sealing process is more coherent by replacing the sealing bottom plate, the efficiency is improved, the sealing bottom plate can be replaced according to different series of marine diesel engine cylinder units, and the flexibility is improved.

[0084] See Figures 8-9As shown, the flip seal clamp 4 includes a first connecting rod 4-1, a first telescopic cylinder 4-2, a support chassis 4-3, a second connecting rod 4-4, a sealing clamp 4-5, a first sealing washer 4-6, and an A2 guide column 4-7. The power source of the flip seal clamp 4 comes from the first telescopic cylinder 4-2 fixedly connected above the support chassis 4-3. The first telescopic cylinder 4-2 reciprocating motion drives the mutual movement between the first connecting rod 4-1 and the second connecting rod 4-4, thereby driving the sealing clamp 4-5 to rotate 90 degrees in a cycle. The first sealing washer 4-6 is embedded in the groove inside the sealing clamp 4-5. The A2 guide column 4-7 is symmetrically distributed on both sides around the center line of the sealing clamp 4-5. When the first telescopic cylinder 4-2 works, it drives the sealing clamp 4-5 and the A2 guide column 4-7 on the clamp to rotate 90 degrees from the vertical state to the horizontal state. The assembly of the flip seal clamp 4 is completed by the cooperation of the A2 guide column 4-7 with the through hole on the cylinder cover, realizing the end face positioning between the two cylinder covers.

[0085] Referring to Figure 10 As shown, the sealing top plate 5 is in the form of a square. The top plate is provided with a plurality of different size and position telescopic guide columns on the upper part of the cylinder cover, which are A1, A3 telescopic guide columns 5-1 on the upper part of the cylinder cover, A4 telescopic guide columns 5-5 on the upper part of the cylinder cover, and A2 telescopic guide columns 5-6 on the upper part of the cylinder cover, which are symmetrically distributed around the center line of the sealing top plate 5. A plurality of different size, position, and shape through holes are also provided on the sealing top plate 5, which are a first through hole 5-2, a second through hole 5-3, and a third through hole 5-9, which are symmetrically distributed around the center line of the sealing top plate 5. Four electromagnetic suction cups 5-4 are uniformly distributed around the center line of the sealing top plate 5. When the top surface of the cylinder cover is in close contact with the sealing bottom plate 5, the valve guide sleeve and guide rod on the cylinder cover extend out of the through holes at different positions. The different position telescopic guide columns on the upper part of the cylinder cover cooperate with the through holes on the corresponding cylinder cover to complete the positioning of the sealing top plate 5. The A4 telescopic guide column 5-7 on the upper part of the cylinder cover seals the sealing top plate 5. When other cylinder covers are sealed, the A4 telescopic guide column 5-7 on the upper part of the cylinder cover is retracted to be flush with the end face of the sealing top plate 5, ensuring the sealing of other cylinder covers. When the A4 cylinder cover is sealed, the A4 telescopic guide column 5-7 on the upper part of the cylinder cover is inserted into the sealing hole A4-1 on the A4 cylinder cover to complete the sealing of the end face of the cylinder cover. The connecting rod flip seal device 5-8 is on the right side of the sealing top plate 5. The sealing pin is driven by the connecting rod to seal the sealing hole on the A3 cylinder cover. The positioning pin, through hole, and sealing pin on the sealing top plate 5 can satisfy the sealing of cylinder covers of various models.

[0086] Referring to Figures 11-12As shown, the A2 cylinder head is assembled with the A2 cylinder head valve guide sleeve valve guide sleeve A2-3, and the top surface has a cylinder head sealing groove A2-5. When the A2 cylinder head top surface is sealed, the A2 sealing sleeve 5-11 is quickly connected with the electromagnetic chuck 5-4 on the sealing top plate 5 through the connector 5-12. After the connection is completed, the A2 cylinder head is positioned by the A2 cylinder head upper telescopic guide column 5-6 on the sealing top plate 5. The sealing sleeve 5-11 is inserted into the cylinder head sealing groove A2-5. The bottom end of the sealing sleeve 5-11 is equipped with a second sealing washer 5-10. The four A2 cylinder head sealing holes A2-4 on the A2 cylinder head top surface are converted into end surface sealing of the sealing sleeve 5-11. The internal height of the sealing sleeve 5-11 is slightly higher than the height of the A2 cylinder head valve guide sleeve A2-3 left outside the cylinder head plus the groove height of the cylinder head sealing groove A2-5, to prevent interference between the A2 cylinder head valve guide sleeve A2-3 and the internal end surface of the upper sealing sleeve 5-11 during the water tightness test of the cylinder head.

[0087] Referring to Figures 13-14 As shown, the sealing bottom plate 5 has a connecting rod flip sealing device 5-8 for sealing the A3 cylinder head side surface A3 cylinder head sealing hole one A3-1. The connecting rod flip sealing device 5-8 includes a support device 5-8-1, a second telescopic cylinder 5-8-2, a third connecting rod 5-8-3, a fourth connecting rod 5-8-4 and a sealing plug 5-8-5. The connecting rod flip sealing device 5-8 is placed on the upper side of the sealing top plate 5. The second telescopic cylinder 5-8-2 is placed on the lower side of the support device 5-8-1. The third connecting rod 5-8-3 and the fourth connecting rod 5-8-4 are driven to reciprocally flip by the reciprocating telescopic movement of the second telescopic cylinder 5-8-2. The sealing plug 5-8-5 is assembled on the four connecting rods 5-8-3. When the second telescopic cylinder 5-8-2 works, the working state of the connecting rod flip sealing device 5-8 is as shown in Figure 13 As shown, when the second telescopic cylinder 5-8-2 is in the initial state, the working state of the connecting rod flip sealing device 5-8 is as shown in Figure 14 As shown, the sealing plug 5-8-5 is tightly attached to the A3 cylinder head side sealing hole A3-1, and the sealing of the A3 cylinder head sealing hole one A3-1 is completed. When the A3 cylinder head top surface is tightly attached to the sealing top plate 5, the A3 cylinder head guide rod A3-3 on the A3 cylinder head extends through the No. 1 through hole 5-2 on the sealing top plate 5, and the sealing of the A3 cylinder head top surface is completed.

[0088] Referring to Figure 15As shown, the telescopic sealing side plate 7 is symmetrically distributed on both sides of the watertight workbench 1, connected and assembled on the watertight workbench 1 through the support plate 7-2, and the third telescopic cylinder 7-1 is placed on the support plate 7-2. When the third telescopic cylinder 7-1 works, it drives the sealing block 7-3 and the first sealing pin 7-4 to seal the A2 cylinder cover sealing hole one A2-1 on the A2 cylinder cover, and completes the sealing of the A2 cylinder cover sealing hole one A2-1 on the A2 cylinder cover.

[0089] Referring to Figure 16 As shown, the connecting rod turnover device 8 is assembled on the watertight workbench 1, and the turnover of the sealing top plate 5 is driven by the symmetrically distributed left and right sides at the same time. The connecting rod turnover device 8 includes a fourth telescopic cylinder 8-1, a limiting column 8-2, a connecting rod positioning column 8-3, a fifth connecting rod 8-4, a sliding block 8-5, a sixth connecting rod 8-6 and a connecting rod support frame 8-7. The fifth connecting rod 8-4 is rotatably connected to the watertight workbench 1 through the connecting rod positioning column 8-3, and is driven by the fourth telescopic cylinder 8-1 to rotate around the connecting rod positioning column 8-3. When the fifth connecting rod 8-4 rotates, it drives the sliding block 8-5 to move up and down on the sixth connecting rod 8-6, thereby driving the sixth connecting rod 8-6 to rotate. The connecting rod support frame 8-7 is assembled on the sixth connecting rod 8-6, and the position compensation device 3 is assembled on the connecting rod support frame 8-7. The sealing top plate 5 is connected to the position compensation device 3, and the position compensation device 3 compensates for the error of the sealing top plate 5. The sealing top plate is automatically adjusted by the compensation device, so that the sealing pin and the telescopic positioning guide column correspond to the holes on the cylinder cover one by one, the automatic positioning and sealing of the cylinder cover are completed, and the sealing property of the cylinder cover sealing hole meets the watertightness test.

[0090] Referring to Figure 17 As shown, the jacking device 9 drives the support connecting plate 9-4 to move up and down through the jacking cylinder 9-2, and the guide shaft 9-3 is assembled on the support connecting plate 9-4 to ensure the stability during upward and downward movement without deviation. The support connecting plate 9-4 is provided with a positioning pin 9-1, and the positioning and assembly of the cylinder cover tray 10 are completed.

[0091] Referring to Figure 18 As shown, the cylinder cover tray 10 is provided with a recess for installing a water injection pipe 10-2, and four cylinder cover tray guide columns 10-1 of the same size are distributed around the cylinder cover tray 10. The cylinder cover tray 10 cooperates with the cylinder cover sealing bottom plate positioning hole 11-6 on the sealing bottom plate 11. The cylinder cover sealing bottom plate 11 is placed on the cylinder cover tray 10, and the sealing of the cylinder cover sealing hole of various models can be met by replacing the cylinder cover sealing bottom plate 11.

[0092] Referring to Figure 19As shown, the A1 and A2 cylinder head sealing bottom plate 11 is provided with a plurality of A1 cylinder head lower sealing telescopic plugs 11-5 of different sizes and positions, A2 cylinder head lower sealing telescopic plugs 11-1 and A1 cylinder head lower telescopic guide columns 11-3 and A2 cylinder head lower telescopic guide columns 11-4, when different cylinder heads are placed above, the A2 cylinder head lower telescopic guide column 11-4 extends into the through hole of the cylinder head to complete the positioning of the cylinder head, and the corresponding cylinder head lower sealing telescopic plug extends into the sealing hole of the cylinder head to complete the sealing of the sealing hole of the cylinder head, and the other cylinder head lower sealing telescopic plugs are compressed into the sealing bottom plate due to the self-gravity of the cylinder head to prevent interference with the cylinder head, the sealing bottom plate 11 is provided with A2 valve guide sleeve through holes 11-2, when the A2 cylinder head is subjected to water tightness test, the A2-3 valve guide sleeve on the cylinder head extends into the through hole, and the two A1 cylinder head water injection pipe openings 10-2-2 and the A2 cylinder head water injection pipe opening 10-2-1 on the water injection pipe 10-2 extend into the corresponding cylinder head sealing hole for water injection test for water tightness, and the closure and opening of the different cylinder head water injection pipe openings can be completed by controlling the switch pipe, and the sealing bottom plate 11 is provided with four cylinder head sealing bottom plate positioning holes 11-6 corresponding to the cylinder head tray guide columns 10-1 on the cylinder head tray 10 to complete the quick replacement of the cylinder head sealing bottom plate.

[0093] Referring to Figures 20-21 As shown, the A1 cylinder head lower telescopic guide column 11-3 includes a second sealing pin 11-3-1, a spring 11-3-2 and a fixed seat 11-3-3, Figure 20 The second sealing pin 11-3-1 is in an initial non-working state, and the spring 11-3-2 is in a telescopic state, Figure 21 The second sealing pin 11-3-1 is in a working state, and when other types of cylinder heads are placed on the sealing bottom plate 10, the second sealing pin 11-3-1 is pressed by the bottom surface of the cylinder head to be lowered to be flat with the cylinder head bottom plate 10, so as to prevent interference, and the different positions of the cylinder head lower telescopic guide column can meet the sealing of the sealing holes of a plurality of types of cylinder heads.

[0094] It should be noted that the various guide columns and plugs on the upper part or lower part of the cylinder head involved in the present application are all in the structure as Figures 20-21 shown above, only the position, size and telescopic height are slightly different.

[0095] Referring to Figures 22-23As shown, the structure of the A3 cylinder head sealing bottom plate 12 and the A4 cylinder head sealing bottom plate 13 is similar, both including an A3 lower sealing sleeve 12-1 and an A4 lower sealing sleeve 13-2, the diameter of the sealing sleeve is consistent with the diameter of the lower cylinder of the corresponding cylinder head, and the sleeve height is consistent with the height of the lower cylinder of the cylinder head, the sealing sleeve is provided with an A3 water inlet 12-4 and an A4 water inlet 13-4, the A3 cylinder head sealing bottom plate 12 and the A4 cylinder head sealing bottom plate 13 are provided with an A3 guide column 12-3 and an A4 guide column 13-1 corresponding to the cylinder head to complete the positioning of the cylinder head, when the cylinder head of the corresponding model is assembled on the sealing sleeve, the third sealing washer 12-2 and the fourth sealing washer 13-3 are assembled on the sealing sleeve, the cylinder head cylinder end surface is tightly attached to the third sealing washer 12-2 and the fourth sealing washer 13-3, so that the sealing hole on the lower cylindrical surface of the A3 cylinder head and the A4 cylinder head is converted into the sealing of the upper end surface of the cylinder head cylinder, and the water tightness test of the cylinder head is completed by injecting water through the A3 water inlet 12-4 and the A4 water inlet 13-4 on the sealing sleeve, and the replacement of the sealing bottom plate of the cylinder head of different models is completed by corresponding the A3 cylinder head sealing bottom plate positioning hole 12-5 on the A3 cylinder head sealing bottom plate 12 with the cylinder head tray guide column 10-1 on the cylinder head tray 10, and the A4 cylinder head sealing bottom plate positioning hole 13-5 on the A4 cylinder head sealing bottom plate 13 also corresponds to the replacement of the sealing bottom plate of the cylinder head tray 10.

[0096] Referring to Figures 24-26 As shown, the sealing working state of the three kinds of marine diesel engine cylinder head sealing top plate 5 is shown, the marine diesel engine A1, A3, A4 three cylinder heads are provided with an A1 cylinder head valve guide sleeve A1-3, an A3 cylinder head valve guide sleeve A3-2, an A4 cylinder head valve guide sleeve A4-3 and an A1 cylinder head guide rod A1-2, an A3 cylinder head guide rod A3-3, an A4 cylinder head guide rod A4-2, the guide rods and valve guide sleeves on the cylinder heads of different models extend through the through holes on the sealing top plate 5, the A1 cylinder head valve guide sleeve A1-3 and the A1 cylinder head guide rod A1-2 on the A1 cylinder head extend through the three number through hole 5-9 and the one number through hole 5-2 on the sealing top plate 5 respectively, the A3 cylinder head valve guide sleeve A3-2 and the guide rod A3-3 on the A3 cylinder head extend through the three number through hole 5-9 and the one number through hole 5-2 on the sealing top plate 5 respectively, the A4 cylinder head valve guide sleeve A4-3 and the guide rod A4-2 on the A4 cylinder head extend through the three number through hole 5-9 and the two number through hole 5-3 on the sealing top plate 5 respectively, through the through holes at multiple positions on the sealing top plate 5, the water tightness test of various types of cylinder heads is satisfied.

[0097] Referring to Figures 27-30As shown, the marine diesel engine cylinder head A1, A2, A3, A4 is respectively in the water-tightness inspection position state of assembly. Taking the water-tightness inspection of the marine diesel engine cylinder head A1 as an example, the A1 cylinder head is placed on the sealing bottom plate 11 through the hoisting device, the sealing bottom plate 11 is assembled on the cylinder head tray 10, the cylinder head tray 10, the sealing bottom plate 11 and the A1 cylinder head are slowly moved upward through the jacking device 9, the sealing top plate 5 is turned clockwise by ninety degrees to the upper side of the A1 cylinder head through the connecting rod turnover device 8, the position of the sealing top plate 5 is compensated through the position compensation device 3, the cylinder head upper telescopic guide column 5-1 and the sealing pin on the sealing top plate 5 are corresponded to the A1 cylinder head positioning hole A1-4 and the sealing hole on the A1 cylinder head, the sealing of the top surface of the A1 cylinder head is completed, the sealing top plate 5 is pressed to prevent movement through the pressing device 2, after the water-tightness inspection is completed, the pressing device 2 returns to the initial position, the sealing top plate is counterclockwise turned by ninety degrees to the initial position through the connecting rod turnover device 8, the hoisting device is lifted away from the A1 cylinder head, and the jacking device 9 returns to the initial position, and the next cylinder head is subjected to the water-tightness inspection.

[0098] The marine diesel engine cylinder head flexible automatic water-tightness inspection method provided by the application takes the water-tightness inspection of the marine diesel engine cylinder head A1 as an example, and the main process is as follows:

[0099] S1, determine the type of the marine diesel engine cylinder head A1 to be assembled: record the length, width, height and other external dimensions of the marine diesel engine cylinder head A1 and the sealing bottom plate 11 required by the cylinder;

[0100] S2, when the device starts to operate, the sealed cylinder unit to be inspected is lifted to the cylinder head tray 10 on the jacking device 9 through the hoist, the sealing bottom plate 11 corresponding to the cylinder head is placed on the cylinder head tray 10, the jacking device 9 slowly rises, the A1 cylinder head positioning hole A1-4 on the A1 cylinder head is inserted into the A1 cylinder head lower telescopic guide column 11-3 on the sealing bottom plate 11 to complete the positioning of the A1 cylinder head, at the same time, the A1 cylinder head sealing hole two A1-5 on the A1 cylinder head is corresponded to the A1 cylinder head lower sealing telescopic plug 11-5 on the sealing bottom plate 11 to complete the sealing of the bottom surface sealing hole of the A1 cylinder head, one of the sealing holes A1-4 on the A1 cylinder head is corresponded to the A1 cylinder head water injection pipe port 10-2-2 on the water injection pipe 10-2, and the water-tightness inspection of the cylinder head is completed by injecting water from the water injection pipe 10-2.

[0101] S3, the fourth telescopic cylinder 8-1 on the linkage turnover device 8 works to drive the fifth linkage 8-4 to rotate around the linkage positioning column 8-3, the slider 8-5 and the sixth linkage 8-6 rotate with the fifth linkage 8-4, the linkage support frame 8-7 on the sixth linkage 8-6 synchronously drives the sealing top plate 5 to rotate clockwise by 90 degrees to the upper side of the A1 cylinder cover, the position coordinates of the sealing top plate 5 are compensated by the position compensation device 3 to make the sealing top plate 5 reach the upper side of the A1 cylinder cover, and the pressing device 2 starts to work to press the sealing top plate 5 to ensure the stability thereof.

[0102] S4, the jacking device 5 slowly rises to drive the A1 cylinder cover, so that the top surface of the A1 cylinder cover slowly contacts the sealing top plate 5, the A1 cylinder cover upper telescopic guide column 5-1 on the sealing top plate 5 extends into the A1 cylinder cover positioning hole A1-4 on the A1 cylinder cover, the positioning of the sealing top plate 5 is completed, the A1 cylinder cover valve guide sleeve A1-3 and the guide rod A1-2 on the A1 cylinder cover respectively extend out of the No. 3 through hole 5-9 and the No. 1 through hole 5-2 on the sealing top plate 5, and the A1 cylinder cover upper sealing telescopic plug 5-13 on the sealing top plate 5 extends into the A1 cylinder cover sealing hole one A1-1 on the top surface of the A1 cylinder cover, so that the A1 cylinder cover sealing hole one A1-1 on the top surface of the A1 cylinder cover is sealed.

[0103] S5, when the cylinder cover lower sealing telescopic plug 11-5, 5-13 on the sealing bottom plate 11 and the sealing top plate 5 respectively extends into the A1 cylinder cover sealing hole A1-5, A1-1, and then the water injection port 10-2 on the sealing bottom plate 11 starts to inject water to perform the water tightness test of the A1 cylinder cover, the next operation is waited.

[0104] S6, when the water tightness test of the A1 cylinder cover is completed, the linkage turnover device 8 drives the sealing top plate 5 to rotate clockwise by 90 degrees to return to the initial position, the marine diesel engine cylinder cover A1 which has completed the water tightness test is hoisted away, and the jacking device 9 drives the cylinder cover tray 10 and the sealing bottom plate 11 to slowly descend to the initial position to wait for the water tightness test of the next marine diesel engine cylinder cover.

[0105] The above is only the preferred specific embodiment of the present application, but the protection scope of the present application is not limited to this, any person skilled in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A flexible automatic watertightness inspection device for a marine diesel engine cylinder head, characterized in that: include: A watertight workbench (1) is placed on the ground to support the entire tooling, and the diesel engine cylinder head is installed therein; A flip sealing clamp (4) is located on the side of the watertight workbench (1) and is used for positioning between the double-layer diesel engine cylinder heads; A sealing top plate (5) is located on the top of the watertight workbench (1) and is used for positioning on the top surface of the diesel engine cylinder head and sealing the sealing hole; A connecting rod turning device (8) is located on the side of the watertight workbench (1) and is used to drive the sealing top plate (5) to turn over, thereby realizing the opening and closing of the top of the watertight workbench (1); A cylinder head tray (10) is located at the bottom of the watertight workbench (1) and is used for positioning the bottom surface of the diesel engine cylinder head and sealing the sealing hole; The lifting device (9) is located at the lower part of the cylinder head tray (10), drives the cylinder head tray (10) to rise, and jointly positions the diesel engine cylinder head with the sealing top plate (5), thereby achieving the clamping of the diesel engine cylinder head and the sealing of the sealing hole; The telescopic sealing side plate (7) is located on the side of the watertight workbench (1) and is used for sealing the sealing hole on the side of the diesel engine cylinder cover.

2. The flexible automatic watertightness inspection equipment for a marine diesel engine cylinder head according to claim 1 is characterized in that: The flip sealing clamp (4) comprises a first connecting rod (4-1), a first telescopic cylinder (4-2), a supporting base (4-3), a second connecting rod (4-4), a sealing clamp (4-5), a first sealing gasket (4-6) and an A2 guide column (4-7); The supporting frame (4-3) is fixed to the outside of the side of the watertight workbench (1), and the first telescopic cylinder (4-2) is fixed to the upper part, and its piston rod moves horizontally; the second connecting rod (4-4) is an "L"-like structure, and its structural bending point is a hinge point, which is hinged to the supporting frame (4-3); the second connecting rod (4-4) is connected to the first telescopic cylinder (4-2) through the first connecting rod (4-1), and one end of the first connecting rod (4-1) is hinged to one end of the second connecting rod (4-4). The other end of the rod (4-1) is hinged to the piston rod of the first telescopic cylinder (4-2), and the other end of the second connecting rod (4-4) is fixedly connected to the sealing clamp (4-5). The inner ring of the sealing clamp (4-5) has a first sealing gasket (4-6). The first sealing gasket (4-6) is embedded in the cylinder head sealing grooves corresponding to the upper and lower diesel engine cylinder heads. The sealing clamp (4-5) is also provided with two A2 guide columns (4-7) for being inserted into the cylinder head positioning holes of the diesel engine cylinder head.

3. The flexible automatic watertightness inspection equipment for a marine diesel engine cylinder head according to claim 1 is characterized in that: The sealing top plate (5) comprises a top plate body, and a cylinder head upper telescopic guide column, a through hole, a cylinder head upper sealing telescopic plug, and a connecting rod flip sealing device (5-8) arranged on the top plate body; The telescopic guide column on the upper part of the cylinder head corresponds to the cylinder head positioning hole on the top of the diesel engine cylinder head; The through hole is for the guide rod on the top of the corresponding diesel engine cylinder head to pass through to avoid interference; The cylinder head upper sealing telescopic plug is used to seal the cylinder head sealing hole on the top surface of the diesel engine cylinder head; The connecting rod flip sealing device (5-8) is used for sealing the sealing hole on the side of the diesel engine cylinder head. The connecting rod flip sealing device (5-8) includes a supporting device (5-8-1), a second telescopic cylinder (5-8-2), a third connecting rod (5-8-3), a fourth connecting rod (5-8-4) and a sealing plug (5-8-5). The supporting device (5-8-1) is located on the top plate body, the second telescopic cylinder (5-8-2) is installed on the supporting device (5-8-1), and the second telescopic cylinder (5-8-2) is movable. The plug rod moves horizontally; the third connecting rod (5-8-3) is an "L"-like structure, one end of the third connecting rod (5-8-3) is hinged to the piston rod, and the other end of the third connecting rod (5-8-3) is hinged to the supporting device (5-8-1); the fourth connecting rod (5-8-4) is fixedly connected to the end of the third connecting rod (5-8-3) hinged on the supporting device (5-8-1) to achieve flipping; the sealing plug (5-8-5) is located at the end of the fourth connecting rod (5-8-4) to seal the cylinder head sealing hole on the side of the diesel engine cylinder head.

4. The flexible automatic watertightness inspection equipment for a marine diesel engine cylinder head according to claim 3 is characterized by: The sealing top plate (5) has a top plate body with an upper sealing sleeve detachably provided at the bottom thereof. The upper sealing sleeve is a cover structure with an opening at the bottom. An electromagnetic suction cup (5-4) is provided on the top plate body. A connector (5-12) corresponding to the electromagnetic suction cup (5-4) is provided on the upper sealing sleeve for rapid positioning and connection. The edge of the cover structure is a second sealing gasket (5-10) for being embedded in a cylinder head sealing groove corresponding to the top of the diesel engine cylinder head.

5. The flexible automatic watertightness inspection equipment for a marine diesel engine cylinder head according to claim 1 is characterized in that: A telescopic sealing side plate (7) is arranged on both sides of the watertight workbench (1) for sealing the sealing holes on the side of the double-layer diesel engine cylinder head. The telescopic sealing side plate (7) comprises a support plate (7-2) fixed on the watertight workbench (1) and a third telescopic cylinder (7-1) on the support plate (7-2). The piston rod of the third telescopic cylinder (7-1) moves horizontally, and the end of the piston rod is a movable plate. The movable plate has a sealing block (7-3) and a first sealing pin (7-4). The sealing block (7-3) synchronously seals the sealing holes on the side of the double-layer diesel engine cylinder head. The first sealing pin (7-4) is used for synchronous positioning of the pin holes on the side of the double-layer diesel engine cylinder head.

6. The flexible automatic watertightness testing equipment for a marine diesel engine cylinder head according to claim 1, characterized in that: A connecting rod turning device (8) is arranged on both sides of the watertight workbench (1), and the connecting rod turning device (8) comprises a fourth telescopic cylinder (8-1), a limit column (8-2), a connecting rod positioning column (8-3), a fifth connecting rod (8-4), a slider (8-5), a sixth connecting rod (8-6) and a connecting rod support frame (8-7); the fifth connecting rod (8-4) is rotatably connected to the side of the watertight workbench (1) through the connecting rod positioning column (8-3), the fourth telescopic cylinder (8-1) is rotatably connected to the side of the watertight workbench (1), and the piston rod of the fourth telescopic cylinder (8-1) is rotatably connected to the side of the watertight workbench (1). A cross bar is provided at the bottom of the watertight workbench (1) at the lower end of the fifth connecting rod (8-4); the lower end of the sixth connecting rod (8-6) is sleeved on the cross bar for rotation; the upper end is connected to the connecting rod support frame (8-7); the sealing top plate (5) is located on the connecting rod support frame (8-7); the sixth connecting rod (8-6) is provided with a slider (8-5) movable along the sixth connecting rod (8-6); the upper end of the fifth connecting rod (8-4) is rotatably connected to the slider (8-5); a limiting column (8-2) is also provided on the side of the watertight workbench (1) to prevent the fourth telescopic cylinder (8-1) from excessively pushing the lower part of the fifth connecting rod (8-4); A position compensation device (3) is provided between the sealing top plate (5) and the connecting rod support frame (8-7) for fine-tuning the position of the sealing top plate (5) in the plane direction.

7. The flexible automatic watertightness testing equipment for a marine diesel engine cylinder head according to claim 1, characterized in that: The lifting device (9) includes a lifting cylinder (9-2), the upper portion of which is a supporting connecting plate (9-4), the lifting cylinder (9-2) drives the supporting connecting plate (9-4) to rise and fall via a piston rod, a guide shaft (9-3) is further provided between the bottom of the supporting connecting plate (9-4) and the bottom of the watertight workbench (1), and a positioning pin (9-1) is provided on the upper surface of the supporting connecting plate (9-4) for mounting with the cylinder head tray (10); The cylinder head tray (10) is provided with a groove for installing a water injection pipe (10-2), the bottom of the cylinder head tray (10) is docked with a positioning pin (9-1) for positioning, a cylinder head sealing bottom plate is installed on the cylinder head tray (10), and the cylinder head tray (10) has a cylinder head tray guide column (10-1) docked with the cylinder head sealing bottom plate.

8. The flexible automatic watertightness testing equipment for a marine diesel engine cylinder head according to claim 7, characterized in that: The upper surface of the cylinder head sealing bottom plate is provided with a cylinder head lower sealing telescopic plug, a cylinder head lower telescopic guide column, and a valve guide sleeve through hole; The telescopic guide column at the bottom of the cylinder head corresponds to the cylinder head positioning hole at the bottom of the diesel engine cylinder head; The valve guide sleeve through hole corresponds to the valve guide sleeve at the bottom of the diesel engine cylinder head; The cylinder head lower sealing telescopic plug is used to seal the cylinder head sealing hole at the bottom of the diesel engine cylinder head; The cylinder head sealing bottom plate is also provided with a cylinder head water injection pipe port corresponding to the water injection pipe (10-2), and the cylinder head water injection pipe port is connected to a sealing hole of the corresponding diesel engine cylinder head.

9. The flexible automatic watertightness testing equipment for a marine diesel engine cylinder head according to claim 7, characterized in that: A lower sealing sleeve is provided on the upper surface of the cylinder head sealing base plate. The lower sealing sleeve is a cover structure with an upper opening. The cylindrical base at the lower part of the cylinder head is installed in the lower sealing sleeve. The lower sealing sleeve has a water injection port. A guide column corresponding to the cylinder head positioning hole at the bottom of the cylinder head is also provided on the cylinder head sealing base plate. The edge of the cover structure is a sealing gasket, which is used to be embedded in the cylinder head sealing groove corresponding to the bottom of the diesel engine cylinder.

10. The flexible automatic watertightness inspection equipment for a marine diesel engine cylinder head according to claim 7, characterized in that: The watertight workbench (1) is also provided with a pressing device (2), which is used to press down the sealing top plate (5) to ensure its stability.

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