CN216791133U - Inspection tool for starting valve hole of cylinder cover of marine diesel engine - Google Patents
Inspection tool for starting valve hole of cylinder cover of marine diesel engine Download PDFInfo
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- CN216791133U CN216791133U CN202122951440.3U CN202122951440U CN216791133U CN 216791133 U CN216791133 U CN 216791133U CN 202122951440 U CN202122951440 U CN 202122951440U CN 216791133 U CN216791133 U CN 216791133U
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- starting valve
- valve hole
- hole
- guide rod
- flange
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Abstract
A test tool for a starting valve hole of a marine diesel engine cylinder cover is arranged in the starting valve hole and comprises a guide rod, a flange, a stud and a nut; the guide rod is inserted into the starting valve hole, the bottom of the guide rod is provided with a positioning cylindrical surface and a detection surface, the positioning cylindrical surface is matched with the small hole of the starting valve hole, the detection surface is attached to the sealing surface of the starting valve hole, and the periphery of the middle part of the guide rod is a circular guide surface which is matched with the large hole of the starting valve hole; the flange is connected to the top of the guide rod, and the stud penetrates through connecting holes on two sides of the flange and is screwed into a screw hole in the cylinder cover; the nut is screwed at the upper end of the stud and presses the guide rod into the starting valve hole through the flange; the detection surface is coated with blue oil and is tightly attached to the sealing surface, so that the flatness of the sealing surface and the mounting hole position of the starting valve hole are detected. The utility model can conveniently detect the sealing surface and the mounting hole position of the starting valve hole, timely find the defect of the processing quality of the starting valve hole, and achieve the effects of avoiding unnecessary repair, improving the working efficiency, reducing the process cost and shortening the production period.
Description
Technical Field
The utility model relates to process equipment for manufacturing a marine diesel engine, in particular to an inspection tool for a starting valve hole of a cylinder cover of the marine diesel engine, and belongs to the technical field of mechanical manufacturing.
Background
Referring to fig. 1, a starting valve hole of a cylinder cover is a key part of a diesel engine for a dual-fuel ship, and the starting valve hole is arranged on the cylinder cover, and both sides of the starting valve hole are provided with screw holes 1 for mounting the starting valve; the starting valve hole is a step hole and is formed by connecting a large hole 3 at the upper part with a small hole 4 at the lower part, the joint of the large hole 3 and the small hole 4 is a sealing surface 2 which is vertical to the large hole 3 and the small hole 4, an air inlet hole is arranged at the inner side of the starting valve and is communicated with the starting valve, and the outer side of the starting valve is communicated with a combustion chamber of a cylinder cover. The sealing surface 2 serves to separate clean air in the starting valve hole from high-temperature and high-pressure gas in the combustion chamber, so that the requirements on the quality, the precision, the performance and the like of the starting valve hole are high.
At present, no effective inspection means exists for the sealing surface in actual production, once air leakage occurs in an assembly pump pressure test, the possibility of air leakage of the sealing surface is generally considered, but the reason is difficult to confirm, and the reason is the processing quality of the sealing surface of the starting valve hole, the installation position size deviation of the starting valve hole or the improper installation of the starting valve, the reason is difficult to explain from the technical process, and direct evidence that the processing of the starting valve hole and the sealing surface thereof is qualified cannot be provided from the inspection aspect. Therefore, the cylinder cover is frequently and simply reworked by a machine tool again, so that the unreasonable condition that the qualified cylinder cover starting valve hole is sent to rework for many times is caused, the real source of quality problems is covered, the waste of very large rework workload is caused, and the production cycle of machining and manufacturing the cylinder cover is delayed.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defect that the prior art has no effective inspection means for the machining quality of the starting valve hole of the cylinder cover, and provides an inspection tool for the starting valve hole of the cylinder cover of a marine diesel engine.
The technical scheme for solving the technical problems is as follows:
a test tool for a starting valve hole of a cylinder cover of a marine diesel engine is arranged in the starting valve hole, the starting valve hole is formed by connecting a large hole and a small hole which are coaxial, screw holes are formed in the cylinder covers on two sides, and the joint of the large hole and the small hole is a sealing surface; the guide rod is a plunger rod piece and is inserted into the starting valve hole, the circumference of the bottom of the guide rod is provided with a positioning cylindrical surface and a detection surface which is vertical to the positioning cylindrical surface, the positioning cylindrical surface is matched with the small hole of the starting valve hole, the detection surface is attached to the sealing surface of the starting valve hole, the middle part of the guide rod is provided with a guide cylinder, the periphery of the guide cylinder is a circular guide surface, and the circular guide surface is matched with the large hole of the starting valve hole; the flange is connected to the top of the guide rod, and connecting holes are formed in two side parts of the flange; the two studs respectively penetrate through the connecting holes on the two sides of the flange, and the lower ends of the two studs are screwed into the screw holes in the cylinder cover; the nut is screwed on the upper end of the stud, and the guide rod is pressed into the starting valve hole through the flange;
and the detection surface of the guide rod is coated with blue oil and is tightly attached to the sealing surface of the starting valve hole, so that the flatness of the sealing surface and the mounting hole position of the starting valve hole are detected.
Furthermore, the positioning cylindrical surface and the circular guide surface are coaxial.
Furthermore, the matching precision of the positioning cylindrical surface and the small hole of the starting valve hole and the matching precision of the circular guide surface and the large hole of the starting valve hole are both H8.
Furthermore, the top end of the guide rod is provided with a shoulder, the center of the flange is provided with a mounting hole, the mounting hole is sleeved on the guide rod, and the lower plane of the flange is pressed on the shoulder.
The utility model can accurately detect the sealing surface and the mounting hole position of the starting valve hole, and achieves the following beneficial effects:
1) the defect of the processing quality of the starting valve hole can be found in time, and the effects of avoiding unnecessary repair workload, reducing the process cost and shortening the production period are achieved.
2) The inspection tool is simple to install, convenient to operate, capable of being used repeatedly and high in universality.
3) The operation efficiency is high, can detect sealed face quality and installation hole site fast, directly perceived.
Drawings
Fig. 1 is a schematic view of the construction of the starting valve bore.
Fig. 2 is a schematic structural diagram of the present invention.
Fig. 3 is an enlarged view of a portion a of fig. 2.
Fig. 4 is a state diagram of the use of the present invention.
In the figure, the position of the upper end of the main shaft,
the detection device comprises a screw hole 1, a sealing surface 2, a large hole 3, a small hole 4, a guide rod 5, a flange 6, a stud 7, a nut 8, a detection surface 9, a positioning cylindrical surface 10 and a circular guide surface 11.
Detailed Description
The present invention will be described in further detail with reference to the following drawings and specific examples, but the following examples are not intended to limit the scope of the present invention.
The utility model is used for the inspection of the sealing surface and the mounting hole site of the starting valve hole of the cylinder cover of the marine diesel engine, please refer to fig. 1, the starting valve hole is a step hole and is formed by connecting a large hole 3 and a small hole 4 which are coaxial, the joint of the large hole 3 and the small hole 4 is a sealing surface 2, the sealing surface 2 is vertical to the axes of the large hole 3 and the small hole 4, and the cylinder covers at the two sides of the starting valve hole are provided with screw holes 1 for mounting the starting valve.
Referring to fig. 2, an inspection tool for a cylinder head starting valve hole of a marine diesel engine is shown installed in the starting valve hole, and includes a guide rod 5, a flange 6, a stud 7, and a nut 8.
The guide rod 5 is a plunger type rod member inserted into the starting valve hole. A positioning cylindrical surface 10 and a detection surface 9 are arranged on the circumference of the bottom of the guide rod 5, and referring to fig. 3, the detection surface 9 is perpendicular to the positioning cylindrical surface 10; the positioning cylindrical surface 10 is matched with the small hole 4 of the starting valve hole, and the detection surface 9 is tightly attached to the sealing surface 2 of the starting valve hole. The middle part of the guide rod 5 is provided with a guide cylinder, the periphery of the guide cylinder is a round guide surface 11, and the round guide surface 11 is matched with the large hole 3 of the starting valve hole. The positioning cylindrical surface 10 and the circular guide surface 11 are coaxial; the matching precision of the positioning cylindrical surface 10 and the small hole 4 of the starting valve hole and the matching precision of the circular guide surface 11 and the large hole 3 of the starting valve hole are both H8.
Referring to fig. 2, the flange 6 is connected to the top of the guide rod 5, and connection holes are formed at both sides of the flange. The top end of the guide rod 5 is provided with a shoulder, the center of the flange 6 is provided with a mounting hole, the mounting hole is sleeved on the guide rod 5, and the lower plane of the flange 6 is pressed on the shoulder.
The two studs 7 respectively penetrate through the connecting holes on the two sides of the flange 6, and the lower ends of the studs are screwed into the screw holes 1 in the cylinder cover.
The nut 8 is screwed on the upper end of the stud 7, and the guide rod 5 is pressed into the starting valve hole through the flange 6.
The detection surface 9 of the guide rod 5 is coated with blue oil and is closely attached to the sealing surface 2 of the starting valve hole, so that the flatness of the sealing surface 2 and the mounting hole position of the starting valve hole are detected.
The specific process of using the present invention is as follows, please refer to fig. 4:
coating blue oil on a detection surface 9 of a guide rod 5, then placing the guide rod 5 into a starting valve hole, matching a circular guide surface 11 of the guide rod 5 with a large hole 3 of the starting valve hole and guiding the guide rod 5 in, and entering and matching a positioning cylindrical surface 10 of the guide rod 5 with a small hole 4 of the starting valve hole; the flange 6 covers the top end of the guide rod 5, two studs 7 penetrate through connecting holes of the flange 6 and are connected with screw holes 1 on a cylinder cover, and if the studs 7 can be naturally connected without interference, the mounting holes of the starting valve hole are not deviated; then screwing the nut 8, and pre-tightening the nut 8 to lightly press the flange 6 against the guide rod 5 so that the detection surface 9 is tightly contacted with the sealing surface 2; then the guide rod 5 is taken out, and whether the blue oil on the sealing surface 2 is uniform and complete is checked visually, so that whether the planeness of the sealing surface 2 and the verticality of the large hole 3 and the small hole 4 are qualified is judged.
In conclusion, the utility model has convenient and quick installation and operation, can conveniently, simply and visually inspect the sealing surface and the installation hole site of the starting valve hole of the cylinder cover of the diesel engine, and can be used for quickly inspecting the processing quality of the starting valve hole after pre-assembly, final assembly and motor cars.
Claims (4)
1. A test tool for a starting valve hole of a cylinder cover of a marine diesel engine is arranged in the starting valve hole, the starting valve hole is formed by connecting a large hole and a small hole which are coaxial, screw holes are formed in the cylinder covers on two sides, and the joint of the large hole and the small hole is a sealing surface; the guide rod is a plunger type rod piece and is inserted into the starting valve hole, the circumference of the bottom of the guide rod is provided with a positioning cylindrical surface and a detection surface which is vertical to the positioning cylindrical surface, the positioning cylindrical surface is matched with the small hole of the starting valve hole, the detection surface is attached to the sealing surface of the starting valve hole, the middle part of the guide rod is provided with a guide cylinder, the periphery of the guide cylinder is a circular guide surface, and the circular guide surface is matched with the large hole of the starting valve hole; the flange is connected to the top of the guide rod, and connecting holes are formed in two side parts of the flange; the two studs respectively penetrate through the connecting holes on the two sides of the flange, and the lower ends of the two studs are screwed into the screw holes in the cylinder cover; the nut is screwed on the upper end of the stud, and the guide rod is pressed into the starting valve hole through the flange;
and the detection surface of the guide rod is coated with blue oil and is tightly attached to the sealing surface of the starting valve hole, so that the flatness of the sealing surface and the mounting hole position of the starting valve hole are detected.
2. The inspection tool for the cylinder head starting valve hole of the marine diesel engine according to claim 1, wherein the positioning cylindrical surface is coaxial with the circular guide surface.
3. The inspection tool for the marine diesel cylinder head starting valve hole according to claim 1, wherein the fitting accuracy of the positioning cylindrical surface and the small hole of the starting valve hole and the fitting accuracy of the circular guide surface and the large hole of the starting valve hole are both H8.
4. The inspection tool for the cylinder head starting valve hole of the marine diesel engine according to claim 1, wherein the top end of the guide rod is provided with a shoulder, the center of the flange is provided with a mounting hole which is sleeved on the guide rod, and the lower plane of the flange is pressed against the shoulder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122951440.3U CN216791133U (en) | 2021-11-29 | 2021-11-29 | Inspection tool for starting valve hole of cylinder cover of marine diesel engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122951440.3U CN216791133U (en) | 2021-11-29 | 2021-11-29 | Inspection tool for starting valve hole of cylinder cover of marine diesel engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216791133U true CN216791133U (en) | 2022-06-21 |
Family
ID=82004674
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122951440.3U Active CN216791133U (en) | 2021-11-29 | 2021-11-29 | Inspection tool for starting valve hole of cylinder cover of marine diesel engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216791133U (en) |
-
2021
- 2021-11-29 CN CN202122951440.3U patent/CN216791133U/en active Active
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