CN214471556U - Engine cylinder block gas tightness detects screw - Google Patents
Engine cylinder block gas tightness detects screw Download PDFInfo
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- CN214471556U CN214471556U CN202120863675.4U CN202120863675U CN214471556U CN 214471556 U CN214471556 U CN 214471556U CN 202120863675 U CN202120863675 U CN 202120863675U CN 214471556 U CN214471556 U CN 214471556U
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- cylinder body
- engine block
- airtightness detection
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Abstract
The utility model provides an engine cylinder body airtightness detection screw, which comprises a screw joint part and a front end part which are coaxially connected, wherein the screw joint part comprises a screw cap, a clearance part and a screw thread part, the clearance part is of a cylindrical structure, the screw thread part is provided with a screw thread connected with a cylinder body threaded hole, the front end part is of a cylindrical structure, the screw joint part is provided with a first through hole, the front end part is provided with a second through hole, through designing a hollow detection screw structure, whether a detection medium in a cylinder body water cavity flows out of the cylinder body threaded hole is judged through a detector, so as to judge whether the cylinder body threaded hole has a casting defect, the problem that the traditional engine cylinder body detection device cannot detect the defect of the cylinder body threaded hole is solved, and further, the corrosion of the cylinder body threaded hole and a connecting bolt caused by liquid leakage of the cylinder body water cavity when an engine works is avoided, the problem of the loose of cylinder head bolt is solved, the engine is protected.
Description
Technical Field
The utility model relates to a detection device field specifically is an engine cylinder body gas tightness detects screw.
Background
The engine needs to carry out air tightness detection on a cylinder body water cavity in the manufacturing process, and is used for detecting whether casting defects such as sand holes, shrinkage holes and cracks exist in the cylinder body water cavity and the assembly sealing performance of the cylinder body water cavity after the cylinder body water cavity is assembled with a cylinder sleeve.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem, the utility model provides an engine cylinder body gas tightness detects screw for detect the casting defect of cylinder body screw hole, guarantee the gas tightness of cylinder body screw hole.
The utility model discloses a following technical scheme realizes:
the utility model comprises a screw connection part and a front end part which are coaxially connected,
the screw joint part comprises a nut, a clearance part and a screw thread part,
the space avoiding part is of a cylindrical structure, the thread part is provided with threads connected with the threaded hole of the cylinder body,
the front end part is of a cylindrical structure,
the screwed part is provided with a first through hole, and the front end part is provided with a second through hole.
Furthermore, the diameter of the clearance part is equal to the major diameter of the threads of the thread part, the diameter of the front end part is smaller than the minor diameter of the threads of the thread part, and the detection screw fills the space in the threaded hole of the cylinder body during operation, so that a small amount of detection medium can be detected, and the detection effect is enhanced.
Furthermore, the first through hole is a vertical hole, the upper part of the second through hole is a vertical hole, and the lower part of the second through hole is a side hole.
Further, the diameter of the first through hole is larger than that of the second through hole.
Further, the nut with keep away the vacancy portion with screw thread portion three integrated into one piece, the upper end of front end portion is fixed with the cylinder joint, the cylinder joint inserts in the first through-hole of spiro union portion, and the length of front end portion matches according to the degree of depth of cylinder block screw hole during the operation, and the cylinder block screw hole to the different degree of depth only need change the front end portion that detects the screw like this can, saved the cost greatly.
Furthermore, the nut, the air avoiding part and the thread part are made of steel materials, the front end part is integrally formed by plastic, the front end part of the detection screw is tightly and firmly connected with the screwing part through elastic deformation of the plastic, and the detection screw is convenient to disassemble.
Furthermore, the threads of the thread part are mutually occluded with the four-buckle threads when being fastened with the threaded hole of the cylinder block, so that the contact number of thread teeth is reduced while the firm threaded connection is ensured, the casting defects are prevented from being blocked by the detection screws, and the casting defects of the threaded hole of the cylinder block are detected to the maximum extent.
Furthermore, a detector is arranged at the top of the first through hole of the screwing part and used for detecting a detection medium leaked due to casting defects of the threaded hole of the cylinder body.
Further, the detector is an air bag connected with the first through hole in an air-tight mode, and when the detection solution medium is gas, the air tightness of the threaded hole of the cylinder body is effectively detected.
Further, the detector is a transparent pipe fitting connected with the first through hole in an airtight mode, and the airtightness of the threaded hole of the cylinder body is effectively detected when the detection solution medium is liquid.
The utility model discloses the beneficial effect who produces:
the utility model provides an engine cylinder body gas tightness detects screw, through designing a hollow detection screw structure, judge through the detector whether the detection medium in the cylinder body water cavity flows from the cylinder body screw hole, judge the problem whether there is casting defect in the cylinder body screw hole with this, the difficult problem that traditional engine cylinder body detection device can't detect cylinder body screw hole defect has been solved, and then avoided the engine to leak liquid to cylinder body screw hole and cylinder head connecting bolt's corruption at during operation cylinder water cavity, the not hard up problem of cylinder head bolt has been solved, the engine has been protected.
Drawings
The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings:
FIG. 1 is a view of a detection screw structure;
FIG. 2 is a fragmentary view of the assembly of the test screw during use;
in the figure:
2. a pressure plate is arranged on the upper surface of the frame,
3. a threaded hole of the cylinder body is provided,
4. the water cavity of the cylinder body is provided with a water cavity,
51. an upper sealing gasket is arranged on the upper side of the sealing ring,
52. a lower sealing gasket is arranged on the upper side of the lower sealing gasket,
6. a water outlet of the water cavity is provided,
7. a cylinder sleeve is arranged on the cylinder body,
8. a cylinder block, a cylinder head and a cylinder head,
9. a detector is arranged on the base,
14. the front end part of the front end part,
141. a cylindrical joint is arranged at the upper end of the cylinder,
15. the screw thread part is arranged on the screw rod,
16. a first through-hole is formed in the first substrate,
17. a second through-hole is formed in the first through-hole,
18. an air-escape part is arranged at the air-escape part,
19. the screw cap is provided with a screw cap,
20. a screw connection part.
Detailed Description
Fig. 1 shows the structure diagram of the screw for detecting the air tightness of the engine cylinder, fig. 2 shows the assembly relationship diagram of the detecting screw and the threaded hole 3 of the cylinder during the actual operation, and the following description is made in detail with reference to fig. 1 and fig. 2.
The utility model comprises a screw connection part 20 and a front end part 14 which are coaxially connected,
the screw-coupling portion 20 includes a nut 19, a space-saving portion 18, a screw portion 15,
the space avoiding part 18 is a cylindrical structure, the thread part 15 is provided with threads connected with the threaded hole 3 of the cylinder body,
the front end portion 14 is of a cylindrical configuration,
the screw portion 20 is provided with a first through hole 16, and the front end portion 14 is provided with a second through hole 17.
In the present embodiment, the diameter of the clearance portion 18 is equal to the major diameter of the thread portion 15, and the diameter of the distal end portion 14 is smaller than the minor diameter of the thread portion 15, so that the space in the cylinder block threaded hole 3 is filled by the detection screw during operation, and a small amount of detection medium can be detected, thereby enhancing the detection effect.
In this embodiment, the first through hole 16 is a vertical hole, the upper portion of the second through hole 17 is a vertical hole, and the lower portion of the second through hole 17 is a lateral hole, so that a small amount of liquid detection medium can be stored in the second through hole 17, and the detection effect can be achieved when the leakage amount of the liquid detection medium is small.
In the present embodiment, the diameter of the first through hole 16 is larger than the diameter of the second through hole 17.
In this embodiment, the nut 19, the clearance portion 18 and the threaded portion 15 are integrally formed, the cylindrical joint 141 is fixed to the upper end of the front end portion 14, the cylindrical joint 141 is inserted into the first through hole 16 of the threaded portion 20, and the length of the front end portion 14 is matched according to the depth of the cylinder block threaded hole 3 during operation, so that only the front end portion 14 of the detection screw needs to be replaced for the cylinder block threaded holes 3 with different depths, and the cost is greatly saved.
In this embodiment, the nut 19, the evacuation portion 18 and the threaded portion 15 are made of steel, the front end portion 14 is integrally formed by plastic, the front end portion 14 and the threaded portion 20 of the detection screw are tightly and firmly connected through elastic deformation of the plastic, and the detection screw is convenient to detach.
In the present embodiment, the thread of the thread portion 15 and the cylinder block threaded hole 3 are engaged with each other when fastened, so that the number of contact threads is reduced while securing the screw connection, and the casting defect is prevented from being blocked by the inspection screw, thereby maximally inspecting the casting defect of the cylinder block threaded hole 3.
In the present embodiment, the top of the first through hole 16 of the threaded portion 20 is provided with a detector 9 for detecting a detection medium leaking due to casting defects of the cylinder block threaded hole 3.
In the present embodiment, the detecting instrument 9 is an air bag hermetically connected to the first through hole 16, and is effective to detect the airtightness of the threaded hole 3 of the cylinder block when the detecting medium is gas.
In this embodiment, the detecting instrument 9 is a transparent pipe member hermetically connected to the first through hole 16, and is capable of effectively detecting the airtightness of the cylinder threaded hole 3 when the detecting solution medium is liquid, and also effectively collecting a leaked liquid detecting medium.
The specific operation process is described below by referring to the attached drawings of the specification:
the cylinder sleeve 7 and a sealing ring installed on the cylinder sleeve 7 are pressed into the cylinder body 8 to form a cylinder body water cavity 4, the cylinder sleeve 7 and the cylinder body threaded hole 3 are compressed by the pressing plate 2, an upper sealing gasket 51 is installed on the top surface of the pressing plate 2, a lower sealing gasket 52 is installed on the bottom surface of the pressing plate 2, the inlet of the cylinder body water cavity 4 is sealed by other pressing plates and sealing gaskets, an inlet is reserved and connected with a pressure test pump, a water outlet 6 of the cylinder body water cavity is sealed by a plug and the sealing gaskets, and the air tightness of the whole device during operation is guaranteed.
Inject the detection medium into cylinder body water cavity 4, quiet a period of time of waiting, if there is the sand hole in cylinder body threaded connection hole 3 department, the shrinkage cavity, casting defects such as crackle, then detect the medium and get into cylinder body screw hole 3 through casting defect, whether there is the detection medium to flow out in detecting first through-hole 16 through detector 9, just can detect cylinder body screw hole 3's gas tightness, and then prevented that engine cylinder body screw hole 3 and cylinder head connecting bolt from being corroded's phenomenon from taking place in the actual work, the fastness that cylinder body and cylinder head are connected has been guaranteed, finally, the effect of protecting the engine is played.
The present invention is not limited to the above specific embodiments, and based on the embodiments of the present invention, all other embodiments obtained by the person skilled in the art without creative work all belong to the protection scope of the present invention.
Claims (10)
1. The utility model provides an engine cylinder block gas tightness detects screw which characterized in that:
comprises a screw connection part (20) and a front end part (14) which are coaxially connected,
the screw joint part (20) comprises a screw cap (19), a clearance part (18) and a screw thread part (15),
the space avoiding part (18) is of a cylindrical structure, the thread part (15) is provided with threads connected with a threaded hole of the cylinder body,
the front end portion (14) is of a cylindrical structure,
the screw joint part (20) is provided with a first through hole (16), and the front end part (14) is provided with a second through hole (17).
2. The engine block airtightness detection screw according to claim 1, wherein: the diameter of the clearance portion (18) is equal to the major diameter of the thread portion (15), and the diameter of the front end portion (14) is smaller than the minor diameter of the thread portion (15).
3. The engine block airtightness detection screw according to claim 1, wherein: the first through hole (16) is a vertical hole, the upper part of the second through hole (17) is a vertical hole, and the lower part of the second through hole is a side hole.
4. The engine block airtightness detection screw according to claim 1, wherein: the diameter of the first through hole (16) is larger than the diameter of the second through hole (17).
5. The engine block airtightness detection screw according to claim 1, wherein: the nut (19), the clearance portion (18) and the threaded portion (15) are integrally formed, a cylindrical joint (141) is fixed to the upper end of the front end portion (14), and the cylindrical joint (141) is inserted into a first through hole (16) of the threaded portion (20).
6. The engine block airtightness detection screw according to claim 1, wherein: the nut (19), the clearance portion (18) and the threaded portion (15) are made of steel materials, and the front end portion (14) is integrally formed by plastic.
7. The engine block airtightness detection screw according to claim 1, wherein: the threads of the thread part (15) are mutually meshed with the four-thread screw when being fastened with the threaded hole of the cylinder body.
8. The engine block airtightness detection screw according to claim 1, wherein: and a detector (9) is arranged at the top of the first through hole (16) of the screw joint part (20).
9. The engine block airtightness detection screw according to claim 8, wherein: the detector (9) is an air bag connected with the first through hole (16) in an airtight mode.
10. The engine block airtightness detection screw according to claim 8, wherein: the detector (9) is a transparent pipe connected with the first through hole (16) in an airtight mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120863675.4U CN214471556U (en) | 2021-04-25 | 2021-04-25 | Engine cylinder block gas tightness detects screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120863675.4U CN214471556U (en) | 2021-04-25 | 2021-04-25 | Engine cylinder block gas tightness detects screw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214471556U true CN214471556U (en) | 2021-10-22 |
Family
ID=78180350
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120863675.4U Active CN214471556U (en) | 2021-04-25 | 2021-04-25 | Engine cylinder block gas tightness detects screw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214471556U (en) |
-
2021
- 2021-04-25 CN CN202120863675.4U patent/CN214471556U/en active Active
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