CN112377291A - Water-cooling exhaust pipe with built-in fixing bolt and mounting method thereof - Google Patents
Water-cooling exhaust pipe with built-in fixing bolt and mounting method thereof Download PDFInfo
- Publication number
- CN112377291A CN112377291A CN202011382385.4A CN202011382385A CN112377291A CN 112377291 A CN112377291 A CN 112377291A CN 202011382385 A CN202011382385 A CN 202011382385A CN 112377291 A CN112377291 A CN 112377291A
- Authority
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- China
- Prior art keywords
- exhaust pipe
- water
- pipe body
- fixing bolt
- built
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000001816 cooling Methods 0.000 title claims abstract description 34
- 238000000034 method Methods 0.000 title claims abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 31
- 238000007789 sealing Methods 0.000 claims description 30
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 238000009434 installation Methods 0.000 abstract description 9
- 239000000110 cooling liquid Substances 0.000 abstract description 4
- 239000002826 coolant Substances 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 238000009835 boiling Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/08—Other arrangements or adaptations of exhaust conduits
- F01N13/10—Other arrangements or adaptations of exhaust conduits of exhaust manifolds
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/18—Construction facilitating manufacture, assembly, or disassembly
- F01N13/1805—Fixing exhaust manifolds, exhaust pipes or pipe sections to each other, to engine or to vehicle body
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P3/00—Liquid cooling
- F01P3/12—Arrangements for cooling other engine or machine parts
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust Silencers (AREA)
Abstract
The invention discloses a water-cooling exhaust pipe with a built-in fixing bolt, relates to the technical field of exhaust pipes, and solves the technical problem that the flow of water flow is not smooth due to small flow area and more protrusions of the water flow in the conventional water-cooling exhaust pipe. It includes the blast pipe body, install a plurality of in the blast pipe body by interior toward the fixing bolt who runs through the blast pipe body outward, the side window has been seted up on the blast pipe body of fixing bolt top, install detachable apron on the side window. The invention also discloses an installation method of the water-cooling exhaust pipe with the built-in fixing bolt. The invention can effectively increase the overflowing area of the water cavity in the water-cooled exhaust pipe, reduce the blockage of the water flow by the bulge in the water cavity in the water-cooled exhaust pipe, and smoothly carry the heat of the heat exchange entering the cooling liquid away from the surface area of the exhaust pipe, thereby improving the reliability of the whole exhaust system.
Description
Technical Field
The invention relates to an exhaust pipe, in particular to a water-cooling exhaust pipe with a built-in fixing bolt and an installation method thereof.
Background
Most of the conventional engine exhaust systems belong to dry systems, but the exhaust pipe heat shield (heat insulation sleeve) of the dry system has high surface temperature, so that the proximity of parts is poor, and accidents such as personnel scalding are easily caused. Water-cooled exhaust pipes have been developed to address the problems of dry exhaust systems. The exhaust flow direction and the cooling liquid flow direction of the existing water-cooling exhaust pipe flow in parallel or in opposite directions, namely a longitudinal flow structure, the heat dissipation performance of the existing water-cooling exhaust pipe is better than that of a dry system, and therefore the existing water-cooling exhaust pipe is widely applied.
Fig. 1 shows a typical structure of a cross section of a current water-cooled exhaust pipe. It can be seen that the two side walls of the exhaust pipe body 1 are reserved with enough thickness to process the through holes 2 of the mounting bolts, so that the flow area of the water cavity 3 is small. In addition, the influence of the connecting structure between the exhaust inner pipe 4 and the wall of the water-cooling exhaust pipe causes that the shape inside the water-cooling exhaust pipe is irregular, and the number of local or large-area protruded parts is large, so that more dead zones are formed, the mobility is poor, bubbles are easily generated, and the heat radiation performance of the water-cooling exhaust pipe is seriously influenced.
Disclosure of Invention
The invention aims to solve the technical problem of the prior art, and aims to provide a water-cooling exhaust pipe with a built-in fixing bolt, which solves the problem that the water flow is not smooth due to small flow area and more protrusions of the water flow in the existing water-cooling exhaust pipe.
The second purpose is to provide an installation method of the water-cooling exhaust pipe with the built-in fixing bolt, and the problem that the water flow is not smooth due to small flowing area and more protrusions of the water flow in the existing water-cooling exhaust pipe is solved.
In order to achieve the purpose, the invention provides a water-cooling exhaust pipe with built-in fixing bolts, which comprises an exhaust pipe body, wherein a plurality of fixing bolts penetrating through the exhaust pipe body from inside to outside are installed in the exhaust pipe body, a side window is arranged on the exhaust pipe body above the fixing bolts, and a detachable cover plate is installed on the side window.
The exhaust pipe comprises an exhaust pipe body, a plurality of mounting holes communicated with a water cavity inside the exhaust pipe body are formed in one side of the exhaust pipe body, fixing bolts are mounted in the mounting holes in a one-to-one correspondence mode, bolt heads of the fixing bolts are located inside the exhaust pipe body, and thread sections of the fixing bolts penetrate through the exhaust pipe body and extend to the outer side of the exhaust pipe body.
Furthermore, the inner side of the exhaust pipe body is provided with a sealing platform surrounding the mounting hole, an expansion section is arranged between the bolt head of the fixing bolt and the thread section of the fixing bolt, and the lower end face of the expansion section is in contact connection with the sealing platform.
Furthermore, an installation ring groove is arranged below the expansion section and located on the outer side of the thread section, and a sealing ring is installed in the installation ring groove.
Furthermore, the sealing ring is a copper O-shaped sealing ring or a high-temperature-resistant rubber sealing ring.
Furthermore, at least one fixing bolt is arranged on two sides of each air inlet interface of the exhaust pipe body.
Furthermore, one side of the exhaust pipe body, which is far away from the air inlet interface, is provided with a mounting protrusion, the side window is arranged in the mounting protrusion, and the side window is communicated with the internal water cavity of the exhaust pipe body.
Furthermore, the cover plate is installed on the installation bulge through a locking bolt, and an O-shaped sealing ring is arranged between the cover plate and the installation bulge.
In order to achieve the second purpose, the invention provides a method for installing a water-cooling exhaust pipe with built-in fixing bolts, which comprises the steps of firstly inserting a plurality of fixing bolts into a water cavity in the exhaust pipe body through a side window of the exhaust pipe body, and enabling thread sections of the fixing bolts to penetrate through and extend to the outer side of the exhaust pipe body; then, the fixing bolt is screwed through the side window by using a tool, and the fixing bolt is screwed to the engine so that the exhaust pipe body is fixed to the engine.
Advantageous effects
The invention has the advantages that: mode through built-in fixing bolt is fixed the water-cooling blast pipe, the area of overflowing that can the inside water cavity of effectual increase water-cooling blast pipe, protruding thing is to the blocking of rivers in the inside water cavity of water-cooling blast pipe has been reduced, thereby it is more smooth and easy to make the flow of coolant liquid in the water cavity, flow resistance is littleer, be favorable to the heat exchange of exhaust inner tube and coolant liquid, also can be smooth take away from exhaust inner tube surface area smoothly with the heat that the heat exchange entered into the coolant liquid, thereby the production of the boiling of the inside water cavity of effectual reduction water-cooling blast pipe, promote whole exhaust system's reliability.
Drawings
FIG. 1 is a schematic cross-sectional view of a conventional water-cooled exhaust pipe;
FIG. 2 is a schematic diagram of the front side structure of the water-cooled exhaust pipe according to the present invention;
FIG. 3 is a schematic view of the inside structure of a water-cooled exhaust pipe according to the present invention;
FIG. 4 is a schematic cross-sectional view of the water-cooled exhaust pipe according to the present invention;
fig. 5 is an enlarged schematic view of a portion a in fig. 4.
Wherein: 1-an exhaust pipe body, 2-a through hole, 3-a water cavity, 4-an exhaust inner pipe, 5-a fixing bolt, 6-a side window, 7-a cover plate, 8-a sealing platform, 9-a sealing ring, 10-an air inlet interface, 11-an installation bulge, 51-a bolt head, 52-a thread section and 53-an expansion section.
Detailed Description
The invention is further described below with reference to examples, but not to be construed as being limited thereto, and any number of modifications which can be made by anyone within the scope of the claims are also within the scope of the claims.
Referring to fig. 2 to 5, the water-cooled exhaust pipe with a built-in fixing bolt of the present invention includes an exhaust pipe body 1. A plurality of fixing bolts 5 penetrating through the exhaust pipe body 1 from inside to outside are installed in the exhaust pipe body 1. Specifically, a plurality of mounting holes communicated with the water cavity 3 inside the exhaust pipe body 1 are formed in one side of the exhaust pipe body 1, the fixing bolts 5 are mounted in the mounting holes in a one-to-one correspondence mode, the bolt heads 51 of the fixing bolts 5 are located inside the exhaust pipe body 1, the thread sections 52 of the fixing bolts 5 penetrate through the exhaust pipe body 1 and extend to the outer side of the exhaust pipe body 1, and therefore the fixing bolts 5 are arranged in the exhaust pipe body 1. Can fix the water-cooling blast pipe on the engine through this fixing bolt 5, need not like the position that current water-cooling blast pipe reserved the through-hole, great improvement the flow area of water cavity 3.
Wherein, the both sides of every interface 10 that admits air of blast pipe body 1 all are equipped with at least one fixing bolt 5. The fixing bolts 5 are arranged on two sides of the air inlet interface 10, so that the condition that the connection between the air inlet interface 10 and the air outlet interface of the engine is loosened can be effectively prevented, the risk of air leakage at the joint of the air inlet interface is reduced, and the connection reliability is improved.
Preferably, the inner side of the exhaust pipe body 1 is provided with a sealing platform 8 surrounding the mounting hole, an expansion section 53 is arranged between the bolt head 51 of the fixing bolt 5 and the threaded section 52 thereof, and the lower end surface of the expansion section 53 is in contact connection with the sealing platform 8. Because the mounting hole makes the direct external world of water cavity 3 in the blast pipe body 1 be linked together, consequently, establish sealing platform 8 on the side of mounting hole, through the inseparable laminating realization of expansion section 53 and sealing platform 8 to the mounting hole, reduce the risk that the mounting hole department appears leaking.
Preferably, a mounting ring groove is arranged below the expanding section 53, the mounting ring groove is positioned on the outer side of the threaded section 52, and a sealing ring 9 is mounted in the mounting ring groove. When the fixing bolt 5 is screwed on the engine, the expansion section 53 and the sealing platform 8 are contacted and attached with each other, so that a first sealing strip is formed at the joint of the fixing bolt 5 and the exhaust pipe body 1. And then the expansion section 53 and the sealing platform 8 extrude the sealing ring 9 mutually, so that the sealing ring 9 is tightly pressed between the expansion section 53 and the sealing platform 8, a second sealing strip is formed, the joint of the fixing bolt 5 and the exhaust pipe body 1 is effectively sealed, and the sealing reliability is greatly improved.
Preferably, the seal ring 9 is a copper O-ring or a high-temperature-resistant rubber seal ring.
A side window 6 is arranged on the exhaust pipe body 1 above the fixing bolt 5, and a detachable cover plate 7 is arranged on the side window 6. The fixing bolt 5 in the exhaust pipe body 1 can be operated through the side window 6 so that the fixing bolt 5 is screwed on the engine, thereby completing the fixing of the water-cooled exhaust pipe. Specifically, one side of the exhaust pipe body 1, which is far away from the air inlet interface 10, is provided with a mounting protrusion 11, the side window 6 is arranged in the mounting protrusion 11 and communicated with the internal water cavity 3 of the exhaust pipe body 1, and the fixing bolt 5 is located below the side window 6. Wherein, apron 7 passes through the locking bolt to be installed on installation arch 11, has realized the removable connection of apron 7. An O-shaped sealing ring is arranged between the cover plate 7 and the mounting protrusion 11, so that the cover plate 7 seals the side window 6.
The working principle of the invention is as follows: when the water-cooling exhaust pipe is installed, the water-cooling exhaust pipe is firstly placed at a corresponding position on an engine, then the fixing bolts 5 are inserted into the mounting holes in a one-to-one correspondence mode, then the screwing tool stretches into the exhaust pipe body 1 through the side window 6 and is in butt joint with the fixing bolts 5, and the fixing bolts 5 are screwed on the engine.
A method for installing a water-cooled exhaust pipe with built-in fixing bolts comprises the steps of firstly inserting a plurality of fixing bolts 5 into a water cavity 3 in the exhaust pipe body 1 through side windows 6 of the exhaust pipe body 1, and enabling thread sections 52 of the fixing bolts 5 to penetrate through and extend to the outer side of the exhaust pipe body 1; then, the fixing bolt 5 is screwed through the side window 6 with a tool, and the fixing bolt 5 is screwed to the engine, thereby fixing the exhaust pipe body 1 to the engine. The mode of fixing bolt 5 through built-in water-cooling blast pipe is fixed the water-cooling blast pipe promptly, the mode through running through whole water-cooling blast pipe through traditional relatively, the mounting method of this embodiment can the inside water cavity 3 of effectual increase water-cooling blast pipe the area of overflowing, the protruding thing has reduced in the inside water cavity 3 of water-cooling blast pipe and has blockked to rivers to make the flow of coolant liquid more smooth and easy in the water cavity 3, the flow resistance is littleer, and then has reduced the region in the inside rivers blind spot of rivers blast pipe. Smooth water flow in the water-cooled exhaust pipe is beneficial to heat exchange between the exhaust inner pipe 4 and the cooling liquid, so that the exhaust inner pipe 4 can be effectively cooled; and the reduction of the flowing dead zone can also smoothly carry the heat of the cooling liquid entering the heat exchange away from the surface area of the exhaust inner pipe 4, thereby effectively reducing the boiling of the water cavity 3 in the water-cooled exhaust pipe and improving the reliability of the whole exhaust system.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that those skilled in the art can make various changes and modifications without departing from the structure of the invention, which will not affect the effect of the invention and the practicability of the patent.
Claims (9)
1. The utility model provides a water-cooling blast pipe of built-in fixing bolt, includes blast pipe body (1), its characterized in that, install a plurality of in blast pipe body (1) by interior toward outer fixing bolt (5) that run through blast pipe body (1), side window (6) have been seted up on blast pipe body (1) of fixing bolt (5) top, install detachable apron (7) on side window (6).
2. The water-cooling exhaust pipe with the built-in fixing bolt according to claim 1, characterized in that a plurality of mounting holes communicated with the water cavity (3) inside the exhaust pipe body (1) are formed in one side of the exhaust pipe body (1), the fixing bolts (5) are correspondingly mounted in the mounting holes one by one, bolt heads (51) of the fixing bolts (5) are located inside the exhaust pipe body (1), and thread sections (52) of the fixing bolts (5) penetrate through the exhaust pipe body (1) and extend to the outer side of the exhaust pipe body (1).
3. The water-cooled exhaust pipe with the built-in fixing bolt is characterized in that the inner side of the exhaust pipe body (1) is provided with a sealing platform (8) surrounding the mounting hole, an expansion section (53) is arranged between the bolt head (51) of the fixing bolt (5) and the threaded section (52) of the fixing bolt, and the lower end surface of the expansion section (53) is in contact connection with the sealing platform (8).
4. The water-cooled exhaust pipe with the built-in fixing bolt as claimed in claim 3, characterized in that a mounting ring groove is arranged below the expansion section (53), the mounting ring groove is positioned outside the threaded section (52), and a sealing ring (9) is arranged in the mounting ring groove.
5. The water-cooled exhaust pipe with the built-in fixing bolt as recited in claim 4, characterized in that the sealing ring (9) is a copper O-shaped sealing ring or a high temperature resistant rubber sealing ring.
6. The water-cooled exhaust pipe with the built-in fixing bolt as recited in any one of claims 1 to 5, characterized in that at least one fixing bolt (5) is arranged on both sides of each air inlet interface (10) of the exhaust pipe body (1).
7. The water-cooled exhaust pipe with the built-in fixing bolt as recited in claim 6, characterized in that a mounting protrusion (11) is arranged on one side of the exhaust pipe body (1) far away from the air inlet interface (10), the side window (6) is arranged in the mounting protrusion (11), and the side window (6) is communicated with the internal water cavity (3) of the exhaust pipe body (1).
8. The water-cooled exhaust pipe with the built-in fixing bolt as claimed in claim 7, wherein the cover plate (7) is mounted on the mounting protrusion (11) through a locking bolt, and an O-shaped sealing ring is arranged between the cover plate (7) and the mounting protrusion (11).
9. The mounting method of the water-cooling exhaust pipe with the built-in fixing bolts is characterized in that a plurality of fixing bolts (5) are inserted into a water cavity (3) in the exhaust pipe body (1) through side windows (6) of the exhaust pipe body (1), and thread sections (52) of the fixing bolts (5) penetrate through and extend to the outer side of the exhaust pipe body (1); then, the fixing bolt (5) is screwed through the side window (6) by using a tool, and the fixing bolt (5) is screwed to the engine, so that the exhaust pipe body (1) is fixed to the engine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011382385.4A CN112377291B (en) | 2020-12-01 | 2020-12-01 | Water-cooling exhaust pipe with built-in fixing bolt and installation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011382385.4A CN112377291B (en) | 2020-12-01 | 2020-12-01 | Water-cooling exhaust pipe with built-in fixing bolt and installation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112377291A true CN112377291A (en) | 2021-02-19 |
| CN112377291B CN112377291B (en) | 2023-11-10 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011382385.4A Active CN112377291B (en) | 2020-12-01 | 2020-12-01 | Water-cooling exhaust pipe with built-in fixing bolt and installation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112377291B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4021326C1 (en) * | 1990-07-04 | 1991-09-05 | Mtu Friedrichshafen Gmbh | |
| EP0469171A1 (en) * | 1990-08-02 | 1992-02-05 | Mtu Motoren- Und Turbinen-Union Friedrichshafen Gmbh | Exhaust conduit for supercharged multicylinder engines |
| DE102010048793B3 (en) * | 2010-10-20 | 2011-11-17 | Pierburg Gmbh | Exhaust gas routing device for an internal combustion engine |
| CN104895659A (en) * | 2015-06-30 | 2015-09-09 | 胡晓萍 | Water-cooled exhaust manifold of engine |
| CN204783221U (en) * | 2015-06-30 | 2015-11-18 | 胡晓萍 | Engine water -cooling exhaust manifold |
| CN210317442U (en) * | 2019-07-29 | 2020-04-14 | 山东能源重装集团泰装工程装备制造有限公司 | Exhaust cooling water jacket structure |
| CN111997727A (en) * | 2020-03-02 | 2020-11-27 | 广西玉柴机器股份有限公司 | Water-cooling exhaust pipe |
| CN213598055U (en) * | 2020-12-01 | 2021-07-02 | 广西玉柴机器股份有限公司 | Water-cooling exhaust pipe with built-in fixing bolt |
-
2020
- 2020-12-01 CN CN202011382385.4A patent/CN112377291B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4021326C1 (en) * | 1990-07-04 | 1991-09-05 | Mtu Friedrichshafen Gmbh | |
| EP0469171A1 (en) * | 1990-08-02 | 1992-02-05 | Mtu Motoren- Und Turbinen-Union Friedrichshafen Gmbh | Exhaust conduit for supercharged multicylinder engines |
| DE102010048793B3 (en) * | 2010-10-20 | 2011-11-17 | Pierburg Gmbh | Exhaust gas routing device for an internal combustion engine |
| CN104895659A (en) * | 2015-06-30 | 2015-09-09 | 胡晓萍 | Water-cooled exhaust manifold of engine |
| CN204783221U (en) * | 2015-06-30 | 2015-11-18 | 胡晓萍 | Engine water -cooling exhaust manifold |
| CN210317442U (en) * | 2019-07-29 | 2020-04-14 | 山东能源重装集团泰装工程装备制造有限公司 | Exhaust cooling water jacket structure |
| CN111997727A (en) * | 2020-03-02 | 2020-11-27 | 广西玉柴机器股份有限公司 | Water-cooling exhaust pipe |
| CN213598055U (en) * | 2020-12-01 | 2021-07-02 | 广西玉柴机器股份有限公司 | Water-cooling exhaust pipe with built-in fixing bolt |
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| Publication number | Publication date |
|---|---|
| CN112377291B (en) | 2023-11-10 |
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Effective date of registration: 20230109 Address after: No.88 Tianqiao West Road, Yulin City, Guangxi Zhuang Autonomous Region Applicant after: Guangxi Yuchai Ship Electric Power Co.,Ltd. Address before: No.88 Tianqiao West Road, Yulin City, Guangxi Zhuang Autonomous Region Applicant before: Guangxi Yuchai Machinery Co.,Ltd. |
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