CN114033910B - Anti-disassembly type joint and assembling method and application method thereof - Google Patents
Anti-disassembly type joint and assembling method and application method thereof Download PDFInfo
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- CN114033910B CN114033910B CN202111380808.3A CN202111380808A CN114033910B CN 114033910 B CN114033910 B CN 114033910B CN 202111380808 A CN202111380808 A CN 202111380808A CN 114033910 B CN114033910 B CN 114033910B
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- ring
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- locking ring
- type interface
- joint
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L37/00—Couplings of the quick-acting type
- F16L37/08—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members
- F16L37/084—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members combined with automatic locking
- F16L37/0844—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members combined with automatic locking by means of a ring pivoting so as to lie against the tube
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L13/00—Non-disconnectable pipe joints, e.g. soldered, adhesive, or caulked joints
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Quick-Acting Or Multi-Walled Pipe Joints (AREA)
Abstract
The invention provides an anti-disassembly joint and an assembly method and an application method thereof, the anti-disassembly joint comprises a shell, one end of the shell is a cover cylinder type interface, the other end of the shell is a tube core type interface, a clamping ring, an inner locking ring and an outer locking ring are sequentially sleeved on the cover cylinder type interface from the inner periphery to the outer periphery, the clamping ring is provided with a plurality of clamping jaws, windows are correspondingly formed in the ring wall of the inner locking ring, the clamping ring and the inner locking ring are sleeved and embedded to enable the clamping jaws to be located in the windows in a one-to-one correspondence mode, a plurality of clamping blocks are uniformly and convexly arranged on the outer wall of the inner locking ring, a plurality of clamping holes are correspondingly formed in the peripheral wall of the outer locking ring, the outer locking ring is sleeved and embedded in the clamping holes in the outer periphery of the inner locking ring in a one-to-one correspondence mode, an annular table is convexly arranged on the outer periphery of the cover cylinder type interface, a plurality of assembling blocks are convexly arranged on the annular table in an upward protruding mode, and one end of the outer locking ring is in an annular array and abutted to the cover cylinder type interface, so that the assembling blocks are correspondingly embedded in the assembling grooves to form interference fit.
Description
Technical Field
The invention belongs to the technical field of machinery, and relates to a joint component, in particular to an anti-disassembly joint, and an assembling method and an application method thereof.
Background
Most of the conventional connectors are detachable, for example, the connector is surrounded by a ring of snap ring, which has elasticity and has an annular gap with the connector. The oval snap ring can be pinched into a perfect circle snap ring by only pinching the upper and lower gear structures of the snap ring by hand, so that the left-right distance can be widened, the counter-hand pipe fittings can be released, and the joint can be taken down.
The joint of detachable construction can carry out repetitious reuse, and at many times dismouting in-process, the snap ring is out of shape easily, and the joint dynamics that inevitably makes the joint reduces to there is the danger that the pipe fitting loosens easily in the use. In addition, current detachable joint leads to the joint fastness that itself has poor because of the setting of disconnect structure, under unexpected circumstances, meets the powerful effect and still has the risk of joint and pipe fitting separation.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provides an anti-disassembly type joint which is locked internally and externally to form an unremovable structure so as to prevent repeated use, and an assembling method and an application method thereof.
The purpose of the invention can be realized by the following technical scheme: an anti-dismantling joint comprises a shell, wherein one end of the shell is a cover cylinder type interface, the other end of the shell is a tube core type interface, a clamping ring, an inner locking ring and an outer locking ring are sequentially sleeved on the cover cylinder type interface from the inner periphery to the outer periphery, the clamping ring is provided with a plurality of clamping jaws, a window is correspondingly formed in the wall of the inner locking ring, the clamping ring and the inner locking ring are sleeved and embedded to enable the clamping jaws to be located in the windows in a one-to-one correspondence mode, a plurality of clamping blocks are uniformly and convexly arranged on the outer wall of the inner locking ring, a plurality of clamping holes are correspondingly formed in the wall of the outer locking ring, the outer locking ring is sleeved on the outer periphery of the inner locking ring to enable the clamping blocks to be embedded into the clamping holes in a one-to-one correspondence mode, the outer wall of the clamping ring abuts against the inner peripheral wall of the outer locking ring, an annular table is convexly arranged on the outer periphery of the cover cylinder type interface, a plurality of assembling blocks are convexly arranged on the annular table, a plurality of assembling grooves in an annular array, and the assembling grooves are sleeved and the outer locking ring is larger than the clearance of the clamping rings, and the assembling grooves are formed in an interference fit mode.
In the anti-disassembly type joint, an annular groove is concavely arranged on the outer wall of the cover cylinder type interface, a sealing ring is embedded in the annular groove, and the sealing ring is specifically an O-shaped sealing ring.
In the anti-disassembly type joint, a plurality of rings of barbs are annularly arranged on the outer peripheral wall of the tube core type interface, the outer side surfaces of the barbs are guide ring surfaces, and the guide ring surfaces are provided with guide slope surfaces; the barb medial surface is the joint anchor ring, the joint anchor ring is the annular perpendicular.
In the anti-disassembly type joint, the outer edge of the port of the outer lock ring is symmetrically and concavely provided with the edge cutting grooves.
In foretell type of preventing tearing open connects, the joint ring includes the tourus, set firmly four on the tourus the jack catch, the jack catch has the claw hook towards the centre of a circle, four the claw hook forms joint claw mouth.
In the anti-disassembly type joint, one end of the inner locking ring is provided with a necking opening, and the annular body of the clamping ring is sleeved on the periphery of the necking opening.
In the above-mentioned detachment-preventing type joint, the housing is a quarter turn pipe body.
The assembly method of the disassembly-proof joint comprises the following steps:
1) Firstly, sleeving a sealing ring in an annular groove on the outer wall of the cover cylinder type interface;
2) Then the clamping ring is fixedly embedded with the inner locking ring, so that the clamping jaws of the clamping ring correspondingly extend into the window of the inner locking ring one by one;
3) Then, the outer locking ring is sleeved on the peripheries of the clamping ring and the inner locking ring, so that the clamping blocks of the inner locking ring are correspondingly clamped into the clamping holes of the outer locking ring one by one, and the clamping jaws of the clamping ring are limited to expand outwards by the outer locking ring;
4) And finally, the integral clamping ring, the inner lock ring and the outer lock ring are sleeved on the cover cylinder type interface of the shell, and are clamped with the assembling groove through the assembling block to form interference fit to realize integral fixed connection assembly.
The application method of the anti-disassembly type joint comprises the following steps:
1) Inserting the inserting pipe into an annular gap between the cover cylinder type interface and the outer locking ring, and hooking the clamping hook of the inserting pipe with the clamping jaw of the clamping ring, wherein the clamping jaw cannot expand outwards to release the clamping hook due to the fact that the periphery of the clamping jaw is limited and tightened by the outer locking ring, and therefore the inserting pipe and the inserting pipe form non-detachable assembly;
2) The sleeve pipe is sleeved on the periphery of the tube core type interface, the sleeve pipe is favorably sleeved smoothly through the leading-in slope face of the barb, and the annular vertical face of the barb and the inner wall of the sleeve pipe form friction clamping connection to avoid the sleeve pipe from loosening.
In the application method of the anti-disassembly type joint, in the step 1), a straight screwdriver is inserted into the disassembly gap of the clamping hole of the outer locking ring, and the outer wall of the outer locking ring is broken by prying forcibly, so that the circumferential limiting constraint of the outer locking ring on the clamping jaw is damaged, the clamping jaw is expanded outwards and further loosened from the clamping hook of the insertion pipe, and the joint is removed by unlocking and installation.
Compared with the prior art, the anti-disassembly type joint and the assembling method and the application method thereof have the following advantages:
the jack catch through interior catch pair joint ring forms interior circumference location, forms the periphery location through the jack catch of outer catch pair joint ring to realize the restraint structure of inside and outside both sides, in case the plug connector insert with the claw mouth of jack catch form the joint after, the jack catch can't expand the displacement outward, just make the joint can not loosen and take off, can realize the separation until destroying the catch, lead to the function inefficacy from this, effectively avoid stopping used repeatedly, ensure the reliability that connects and link firmly, promote factor of safety.
Drawings
Fig. 1 is an overall assembly structure view of the present invention.
Fig. 2 is a plan view of the housing of the present invention.
FIG. 3 is a view showing an assembled structure of the snap ring and the inner lock ring in the present invention.
FIG. 4 is an assembled view of the snap ring of the present invention.
Fig. 5 is an assembled construction view of the inner lock ring in the present invention.
Fig. 6 is an assembly structural view of the outer lock ring in the present invention.
In the figure, 1, a cover cylinder type interface; 1a, an annular table; 1b, assembling blocks; 2. a die-type interface; 2a, a barb; 3. a seal ring; 4. a snap ring; 4a, a torus; 4b, a claw; 5. an inner locking ring; 5a, necking down; 5b, a clamping block; 5c, a window; 6. an outer locking ring; 6a, clamping holes; 6b, assembling grooves; 6c, trimming the edge groove.
Detailed Description
The following are specific embodiments of the present invention and are further described with reference to the accompanying drawings, but the present invention is not limited to these embodiments.
As shown in fig. 1 to 6, the tamper-proof connector comprises a housing, one end of the housing is a cover cylinder type interface 1, the other end of the housing is a tube core type interface 2, a clamping ring 4, an inner locking ring 5 and an outer locking ring 6 are sequentially sleeved on the cover cylinder type interface 1 from the inner periphery to the outer periphery, the clamping ring 4 is provided with a plurality of clamping jaws 4b, windows 5c are correspondingly arranged on the ring wall of the inner locking ring 5, the clamping ring 4 and the inner locking ring 5 are sleeved and embedded to enable the clamping jaws 4b to be located in the windows 5c one by one, a plurality of clamping blocks 5b are uniformly and convexly arranged on the outer wall of the inner locking ring 5, a plurality of clamping holes 6a are correspondingly arranged on the peripheral wall of the outer locking ring 6, the outer locking ring 6 is sleeved on the outer periphery of the inner locking ring 5 to enable the clamping blocks 5b to be embedded into the clamping holes 6a one by one, the outer wall of the clamping jaws 4b of the clamping ring 4 abuts against the inner peripheral wall of the outer locking ring 6, an annular table 1a is convexly arranged on the outer periphery of the cover cylinder type interface 1, a plurality of the annular table 1a is convexly arranged on the clamping ring 1b, and the clamping ring 6b, and the clamping ring 1a is abutted against the interference fit with the clamping ring 5, and the clamping ring 6b, and the clamping ring 5, and the interference fit of the clamping ring 1b is formed in the interference fit with the interference fit of the outer locking ring 5.
In the anti-disassembly type joint, the clamping blocks 5b on the outer wall of the inner locking ring 5 are triangular bulges, and the two clamping blocks 5b are arranged in a vertically symmetrical mode. The clamping holes 6a on the peripheral wall of the outer locking ring 6 are rectangular through holes, and the number of the clamping holes 6a is two and is arranged up and down symmetrically. The clamping ring 4 is provided with four clamping jaws 4b which are circumferentially and uniformly arranged, four windows 5c which are circumferentially and uniformly arranged are correspondingly arranged on the ring wall of the inner locking ring 5, and the areas of the windows 5c are matched with the specifications of the clamping jaws 4 b. The number of the assembly blocks 1b is four, and the number of the assembly grooves 6b of the outer lock ring 6 is 24.
An annular groove is concavely arranged on the outer wall of the cover cylinder type interface 1, a sealing ring 3 is embedded in the annular groove, and the sealing ring 3 is specifically an O-shaped sealing ring. The annular groove is provided on the outside of the annular table 1a, whereby leakage of liquid from the fitting gap at the annular table 1a is avoided by the seal ring 3.
A plurality of rings of barbs 2a are annularly arranged on the outer peripheral wall of the tube core type interface 2, the outer side surfaces of the barbs 2a are guide ring surfaces, and the guide ring surfaces are provided with guide slope surfaces; the inner side surface of the barb 2a is a clamping ring 4 surface, and the clamping ring 4 surface is a ring-shaped vertical surface.
The outer edge of the port of the outer lock ring 6 is symmetrically and concavely provided with edge cutting grooves 6c. The number of the edging grooves 6c is two, and the edging grooves are arranged in a left-right symmetrical manner, so that the problem of wrong assembly of the rotation angle can be prevented through edging treatment.
The clamping ring 4 comprises a circular ring body 4a, four clamping jaws 4b are fixedly arranged on the circular ring body 4a, each clamping jaw 4b is provided with a claw hook facing the circle center, and the four claw hooks form a clamping claw opening.
One end of the inner locking ring 5 is provided with a neck reducing opening 5a, and the ring body 4a of the clamping ring 4 is sleeved on the periphery of the neck reducing opening 5 a. The ring body 4a of the clamping ring 4 and the necking opening 5a of the inner locking ring 5 form interference fit, so that the fixed connection effect of tight fit of the inner diameter and the outer diameter is achieved.
The shell is a right-angle turning pipe body.
The assembly method of the disassembly-proof joint comprises the following steps:
1) Firstly, sleeving a sealing ring 3 in an annular groove on the outer wall of the cover cylinder type interface 1;
2) Then, the clamping ring 4 and the inner lock ring 5 are fixedly embedded, so that the clamping claws 4b of the clamping ring 4 correspondingly extend into the windows 5c of the inner lock ring 5 one by one;
3) Then, the outer locking ring 6 is sleeved on the peripheries of the clamping ring 4 and the inner locking ring 5, so that the clamping blocks 5b of the inner locking ring 5 are correspondingly clamped and embedded into the clamping holes 6a of the outer locking ring 6 one by one, and the clamping jaws 4b of the clamping ring 4 are limited to expand outwards by the outer locking ring 6;
4) And finally, the integral clamping ring 4, the inner locking ring 5 and the outer locking ring 6 are sleeved on the cover cylinder type interface 1 of the shell, and interference fit is formed after the assembling block 1b and the assembling groove 6b are clamped to realize integral fixed connection assembly.
The application method of the anti-disassembly type joint comprises the following steps:
1) Inserting the inserting pipe into an annular gap between the cover cylinder type interface 1 and the outer locking ring 6, and hooking the clamping hook of the inserting pipe with the clamping jaw 4b of the clamping ring 4, wherein the clamping jaw 4b cannot expand outwards to release the clamping hook due to the fact that the periphery of the clamping jaw 4b is limited and tightened by the outer locking ring 6, and therefore the inserting pipe and the inserting pipe form non-detachable assembly;
2) The sleeve joint pipe is sleeved on the periphery of the pipe core type interface 2, the smooth sleeve joint of the sleeve joint pipe is favorably sleeved through the leading-in slope face of the barb 2a, and the annular vertical face of the barb 2a and the inner wall of the sleeve joint pipe form friction clamping to avoid the loosening of the sleeve joint pipe.
In the application method of the anti-disassembly type joint, in the step 1), a straight screwdriver is inserted into the disassembly gap of the clamping hole 6a of the outer locking ring 6, and the outer wall of the outer locking ring 6 is broken by prying with force, so that the circumferential limiting constraint of the outer locking ring 6 on the clamping jaw 4b is damaged, the clamping jaw 4b is expanded outwards, and further the clamping hook of the inserting pipe is loosened, and the locking, the installation and the disassembly of the joint are released.
Compared with the prior art, the disassembly-preventing type joint and the assembling method and the application method thereof have the following advantages:
form interior circumference location through 5 pairs of jack catchs 4b of joint ring 4 of interior catch, form the periphery location through 6 pairs of jack catchs 4b of joint ring 4 of outer catch, thereby realize the restraint structure of inside and outside both sides, in case the plug connector inserts and forms the joint with jack catch 4 b's claw mouth, jack catch 4b can't expand the displacement outward, just make the joint can not loosen and take off, can realize the separation until destroying the catch, lead to the functional failure from this, effectively avoid stopping used repeatedly, ensure the reliability that the joint links firmly, and the safety factor is promoted.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.
Although the can-style interface 1 is used more herein; an annular table 1a; an assembly block 1b; a die type interface 2; a barb 2a; a seal ring 3; a snap ring 4; a torus 4a; a claw 4b; an inner locking ring 5; a neck-reducing opening 5a; a fixture block 5b; a window 5c; an outer locking ring 6; a chucking hole 6a; the fitting groove 6b; the term edging groove 6c, etc., but does not exclude the possibility of using other terms. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed as being without limitation to any additional limitations that may be imposed by the spirit of the present invention.
Claims (7)
1. An anti-disassembly type joint comprises a shell, wherein one end of the shell is a cover cylinder type interface, the other end of the shell is a tube core type interface, and the anti-disassembly type joint is characterized in that a clamping ring, an inner locking ring and an outer locking ring are sequentially sleeved on the cover cylinder type interface from the inner periphery to the outer periphery, the clamping ring is provided with a plurality of clamping jaws, windows are correspondingly formed in the wall of the inner locking ring, the clamping ring and the inner locking ring are sleeved and embedded to enable the clamping jaws to be located in the windows in a one-to-one correspondence mode, a plurality of clamping blocks are uniformly and convexly arranged on the outer wall of the inner locking ring, a plurality of clamping holes are correspondingly formed in the peripheral wall of the outer locking ring, the outer locking ring is sleeved on the outer periphery of the inner locking ring to enable the clamping blocks to be embedded into the clamping holes in a one-to-one correspondence mode, the outer wall of the clamping ring abuts against the inner peripheral wall of the outer locking ring, an annular table is convexly arranged on the outer periphery of the cover cylinder type interface, a plurality of assembling blocks are convexly arranged in an annular array assembling grooves, and a plurality of annular array assembling grooves are formed in an interference fit mode that the clamping ring is formed in the clamping gaps of the outer locking ring; the clamping ring comprises a ring body, four clamping jaws are fixedly arranged on the ring body, each clamping jaw is provided with a claw hook facing to the circle center, and the four claw hooks form a clamping claw opening;
the assembly method of the anti-disassembly type joint comprises the following steps:
1) Firstly, sleeving a sealing ring in an annular groove on the outer wall of the cover cylinder type interface;
2) Then the clamping ring is fixedly embedded with the inner locking ring, so that the clamping jaws of the clamping ring correspondingly extend into the window of the inner locking ring one by one;
3) Then, the outer locking ring is sleeved on the peripheries of the clamping ring and the inner locking ring, so that the clamping blocks of the inner locking ring are correspondingly clamped into the clamping holes of the outer locking ring one by one, and the clamping jaws of the clamping ring are limited from expanding outwards by the outer locking ring;
4) And finally, the integral clamping ring, the inner lock ring and the outer lock ring are sleeved on the cover cylinder type interface of the shell, and are clamped with the assembling groove through the assembling block to form interference fit to realize integral fixed connection assembly.
2. The tamper-evident coupling as claimed in claim 1, wherein an annular groove is concavely formed in an outer wall of the boot-cylinder interface, and a sealing ring, in particular an O-ring, is embedded in the annular groove.
3. The tamper-resistant fitting according to claim 1, wherein a plurality of rings of barbs are annularly arranged on the outer peripheral wall of the die interface, the outer side surfaces of the barbs are guide ring surfaces, and the guide ring surfaces are provided with guide slope surfaces; the barb medial surface is the joint anchor ring, the joint anchor ring is the annular perpendicular.
4. The tamper-resistant fitting according to claim 1, wherein the outer edge of the port of the outer locking ring is symmetrically recessed with chamfered grooves.
5. The tamper-evident coupling as claimed in claim 1, wherein the inner locking ring has a neck portion at one end thereof, and the annular body of the snap ring is fitted around the outer periphery of the neck portion.
6. The tamper-evident fitting in accordance with claim 1 wherein the housing is a quarter turn tube.
7. The method of applying a tamper-evident joint as claimed in claim 1, comprising the steps of:
1) Inserting the inserting pipe into an annular gap between the cover cylinder type interface and the outer locking ring, and hooking the clamping hook of the inserting pipe with the clamping jaw of the clamping ring, wherein the clamping jaw cannot expand outwards to release the clamping hook due to the fact that the periphery of the clamping jaw is limited and tightened by the outer locking ring, and therefore the inserting pipe and the inserting pipe form non-detachable assembly;
a straight screwdriver is inserted into the breaking and dismantling gap of the clamping hole of the outer locking ring, and the outer wall of the outer locking ring is broken by prying with force, so that the circumferential limiting constraint of the outer locking ring on the clamping jaw is broken, the clamping jaw is expanded outwards, and further the clamping jaw is loosened with the clamping hook of the insertion pipe, and the locking, the installation and the removal of the joint are released;
2) The sleeve joint pipe is sleeved on the periphery of the pipe core type interface, the smooth sleeving of the sleeve joint pipe is facilitated through the leading-in slope face of the barb, and the annular vertical face of the barb and the inner wall of the sleeve joint pipe form friction clamping to avoid the sleeve joint pipe from loosening.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111380808.3A CN114033910B (en) | 2021-11-08 | 2021-11-08 | Anti-disassembly type joint and assembling method and application method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111380808.3A CN114033910B (en) | 2021-11-08 | 2021-11-08 | Anti-disassembly type joint and assembling method and application method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114033910A CN114033910A (en) | 2022-02-11 |
| CN114033910B true CN114033910B (en) | 2023-03-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111380808.3A Active CN114033910B (en) | 2021-11-08 | 2021-11-08 | Anti-disassembly type joint and assembling method and application method thereof |
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| CN (1) | CN114033910B (en) |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3372886B2 (en) * | 1999-02-18 | 2003-02-04 | エスエムシー株式会社 | Pipe fittings |
| CN201599518U (en) * | 2009-11-11 | 2010-10-06 | 丁扬兴业股份有限公司 | Pipe fitting connector |
| CN107314181A (en) * | 2017-07-19 | 2017-11-03 | 浙江工业大学 | Quick joint of pipeline |
| CN207094002U (en) * | 2017-08-17 | 2018-03-13 | A.雷蒙德公司 | Dismountable Quick Connect Kit |
| CN207349665U (en) * | 2017-09-26 | 2018-05-11 | 上海日成电子有限公司 | Push-in plastic flexible pipe connector |
| CN209671840U (en) * | 2019-02-26 | 2019-11-22 | 李学谦 | Waterway connector |
| CN210800360U (en) * | 2019-11-08 | 2020-06-19 | 江苏亨昇精密机械科技有限公司 | Quick coupling |
| CN214037287U (en) * | 2020-12-30 | 2021-08-24 | 重庆金康赛力斯新能源汽车设计院有限公司 | A liquid-cooled power battery cooling pipeline quick-change joint, cooling pipeline and vehicle |
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2021
- 2021-11-08 CN CN202111380808.3A patent/CN114033910B/en active Active
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| CN114033910A (en) | 2022-02-11 |
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