CN108856389B - Anti-friction equipment for bending pipe fitting - Google Patents
Anti-friction equipment for bending pipe fitting Download PDFInfo
- Publication number
- CN108856389B CN108856389B CN201810786314.7A CN201810786314A CN108856389B CN 108856389 B CN108856389 B CN 108856389B CN 201810786314 A CN201810786314 A CN 201810786314A CN 108856389 B CN108856389 B CN 108856389B
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- Prior art keywords
- pipe
- piston
- groove
- flow control
- barrel
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- 238000005452 bending Methods 0.000 title claims abstract description 30
- 238000005461 lubrication Methods 0.000 claims abstract description 31
- 230000000903 blocking effect Effects 0.000 claims abstract description 6
- 239000000314 lubricant Substances 0.000 claims description 32
- 238000000034 method Methods 0.000 claims description 13
- 238000007599 discharging Methods 0.000 claims description 5
- 230000001050 lubricating effect Effects 0.000 claims description 2
- 241001131688 Coracias garrulus Species 0.000 description 16
- 238000005457 optimization Methods 0.000 description 4
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D7/00—Bending rods, profiles, or tubes
- B21D7/02—Bending rods, profiles, or tubes over a stationary forming member; by use of a swinging forming member or abutment
- B21D7/024—Bending rods, profiles, or tubes over a stationary forming member; by use of a swinging forming member or abutment by a swinging forming member
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D7/00—Bending rods, profiles, or tubes
- B21D7/16—Auxiliary equipment, e.g. for heating or cooling of bends
- B21D7/167—Greasing
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
Abstract
The invention relates to the technical field of pipe fitting processing, in particular to pipe fitting bending anti-friction equipment, which comprises a base, a clamping die and a swivel base; a circle of grooves are formed in the side wall of the rotary seat; an ear plate is fixed on the clamping die, and the rotary seat is rotationally connected with the ear plate; the end part of the clamping die is provided with an arc-shaped groove section; a lubrication barrel, a feed pipe, a discharge pipe and a return pipe are arranged in the swivel mount; a piston is connected in the lubrication barrel in a sliding way, and a reset piece is fixed between the piston and the inner wall of the lubrication barrel; a blocking cover is arranged at the end part of the feeding pipe; an arc opening is arranged on the rotary seat, a sliding rod is connected in the arc opening in a sliding way, and the upper end of the sliding rod is fixed with one of the lug plates; the lower end of the sliding rod is rotationally connected with a roller; the upper surface of the piston is provided with a plurality of wedge blocks at intervals along the circumferential direction of the center of the piston, and the inclined surfaces of the wedge blocks face the roller; and the roller can contact with the inclined surface of the wedge block and push the piston to move downwards. The problem that in prior art, the pipe fitting inboard receives frictional force, causes bending accuracy insufficient easily has been solved to this scheme.
Description
Technical Field
The invention relates to the technical field of pipe fitting machining, in particular to pipe fitting bending anti-friction equipment.
Background
The bent pipe is an indispensable component in a pipe fitting system and has the characteristics of no dead angle and easy cleaning. The bending treatment of the steel pipe is finished by processing in a pipe bending machine, and the general pipe bending machine consists of a wheel die, a clamping die, a guide die, a core rod and other components; in the process of bending the pipe, the pipe can be formed by putting the core rod into the pipe to be bent, putting the pipe to be bent into the clamping die and then snapping the pipe.
The prior art has the following technical problems: the inner side of the pipe fitting is subjected to extrusion and friction force in the bending forming process, so that insufficient bending precision is easily caused.
Disclosure of Invention
The invention aims to provide pipe bending anti-friction equipment, which solves the problem that in the prior art, the inner side of a pipe is easily caused to have insufficient bending precision under the action of friction force.
In order to achieve the above purpose, the basic scheme of the invention is as follows:
The pipe bending anti-friction device comprises a base, a clamping die and a swivel base; the rotary seat is fixed on the base, and a circle of groove for placing the pipe fitting is arranged on the side wall of the rotary seat; two ear plates are fixed at one end of the clamping die, the rotary seat is positioned between the two ear plates, and the rotary seat is rotationally connected with the ear plates; the end part of the clamping die is provided with an arc-shaped groove section which is used for being matched with the groove to form a circular channel for the pipe fitting to pass through;
The rotary seat is internally provided with a lubrication barrel, a feed pipe for adding lubricant into the lubrication barrel, a discharge pipe for guiding the lubricant in the lubrication barrel into the groove and a return pipe for returning the lubricant in the groove into the lubrication barrel; a piston is connected in the lubrication barrel in a sliding way, and a reset piece for resetting the piston is fixed between the piston and the inner wall of the lubrication barrel; a blocking cover is arranged at the end part of the feeding pipe;
An arc opening is arranged on the rotary seat, a sliding rod is connected in the arc opening in a sliding way, and the upper end of the sliding rod is fixed with one of the lug plates; the lower end of the sliding rod is rotationally connected with a roller; the upper surface of the piston is provided with a plurality of wedge blocks at intervals along the circumferential direction of the center of the piston, and the inclined surfaces of the wedge blocks face the roller; and the roller can contact with the inclined surface of the wedge block and push the piston to move downwards.
The beneficial effect that this scheme produced is:
1. When adopting this structure to carry out the return bend, will wait to buckle the pipe fitting penetrate between recess and the arc slot section, then rotate the clamp mould, the pipe fitting just can be buckled along the recess of swivel mount, and then forms the return bend, uses very simply.
2. In the scheme, the clamping die can also drive the sliding rod to move along the arc-shaped opening in the rotating process, and when the sliding rod butts against the opening wall at the other end of the arc-shaped opening, the clamping die can not rotate any more; when the pipe fittings are bent in batches, the bending degree of each pipe fitting can be ensured to be consistent.
3. In the scheme, the clamping die not only can drive the sliding rod to move in the rotating process; the roller wheel under the sliding rod can also move along with the sliding rod; the roller is intermittently contacted with the surface of the wedge block in the moving process, and when the roller moves along the surface of the wedge block, the piston is pushed to move downwards so as to squeeze the lubricant in the lubrication barrel, the lubricant flows out of the discharging pipe, the lubricant flows between the contact surfaces of the pipe fitting and the groove, and the inner side of the pipe fitting is coated with lubricating oil while the pipe fitting is bent; the condition that the inner side of the pipe fitting is extruded and the bending precision of the pipe fitting is insufficient due to the action of friction force is reduced.
The first preferred scheme is as follows: as a further optimization of the basic scheme, the discharging pipe comprises a main pipe and a branch pipe, wherein one end of the main pipe is communicated with the bottom of the lubrication barrel; the branch pipes comprise a vertical pipe and a plurality of transverse pipes which are vertical to the vertical pipe and communicated with the vertical pipe; the other end of the main pipe is communicated with the vertical pipe.
The discharging pipe is further convenient for guiding the lubricant in the lubrication barrel into the groove; and the transverse pipe is arranged mainly to uniformly distribute the pipe orifices of the transverse pipe on the wall of the groove, so that the lubricant is conveniently distributed on the groove of the groove.
And a second preferred scheme is as follows: as a further optimization of the first preferred mode, the return pipe comprises a main return pipe and a plurality of branch return pipes communicated with the main return pipe, and the main return pipe is communicated with the lubrication barrel; the branch return pipe is communicated to the lower part of the groove.
The recovery of the lubricant is further facilitated, and particularly, when the lubricant flows to the lower part of the groove along the side wall of the groove, the lubricant enters the return pipe, after the roller leaves the wedge-shaped block, the reset piece enables the piston to move upwards and restore to the original position, and when the piston moves upwards, the lubricant at the mouth of the return pipe can be sucked into the lubrication barrel.
And a preferred scheme III: as a further optimization of the first preferred scheme or the second preferred scheme, the transverse pipes are internally provided with flow control rods, and one ends of the flow control rods are fixed with flow control discs with diameters larger than the diameters of the transverse pipes; the flow control disc is positioned in the vertical pipe, and a return spring is arranged between the flow control disc and the inner wall of the vertical pipe; the other end of the flow control rod extends into the groove.
The arrangement of the flow control rod is mainly used for enabling the lubricant to flow out only at the groove contacted with the pipe fitting, and the lubricant cannot flow out from other places, so that the waste of the lubricant is prevented. The method comprises the following steps: when the pipe fitting is inserted between the groove and the arc-shaped groove section, as the groove is arranged into a circle along the circumferential direction of the swivel base, if no flow control rod is arranged, all the transverse pipes can flow out of the lubricant as long as the piston moves downwards, so that the lubricant is wasted; the scheme is that the flow control rod is arranged, when the pipe fitting is inserted between the groove and the arc-shaped groove section, the pipe fitting can squeeze the flow control rod, the flow control rod is pushed towards the center of the swivel seat, the flow control disc is not covered at the joint of the transverse pipe and the vertical pipe, at the moment, the transverse pipe is communicated with the vertical pipe, and the lubricant in the vertical pipe enters the transverse pipe and then flows between the groove wall of the groove and the pipe wall of the pipe fitting; the transverse pipe on the groove is not communicated with the vertical pipe, and the lubricant cannot flow out from the transverse pipe.
The preferable scheme is as follows: as a further optimization of the third preferred scheme, the flow control rod comprises a rod body and a buffer ball positioned at the end part of the rod body, wherein the diameter of the buffer ball is smaller than that of the transverse tube; and the buffer ball is positioned in the groove.
The structure further protects the inner side of the bent pipe fitting, and specifically comprises the following steps: when the pipe fitting enters between the groove and the arc groove section, the buffer ball is extruded, so that one part of the buffer ball gradually enters into the transverse pipe, and the other part of the buffer ball is contacted with the inner side of the pipe fitting, so that friction between the pipe fitting and the wall of the groove in the bending process is reduced; in addition, the buffer balls enable a certain small gap to be formed between the inner side of the transverse tube and the wall of the groove, and the lubricant can conveniently enter between the wall of the groove and the outer wall of the inner side of the pipe fitting.
The inner side of the pipe fitting refers to the inner side when the pipe fitting is bent; namely: the pipe fitting is close to one side of the inner wall of the groove.
Drawings
FIG. 1 is a schematic view of the overall structure of the pipe bending antifriction apparatus of the present invention;
FIG. 2 is a transverse cross-sectional view of the pipe bending antifriction apparatus of the present invention;
FIG. 3 is a schematic illustration of the piston and lubrication barrel of FIG. 2;
fig. 4 is an enlarged view of a in fig. 2.
Detailed Description
The invention is described in further detail below by way of specific embodiments:
Reference numerals in the drawings of the specification include: base 1, clamping die 2, otic placode 21, arc slot 22, swivel mount 3, pivot 31, recess 32, arc mouth 33, slide bar 331, gyro wheel 3311, lubricated bucket 4, piston 41, wedge 411, return 42, inlet pipe 5, blanking cover 51, main pipe 6, branch pipe 61, standpipe 611, cross pipe 612, main back flow 7, branch back flow 71, flow control rod 8, pole body 81, buffer ball 82, flow control disc 83, return spring 84.
An embodiment is substantially as shown in figures 1, 2, 3 and 4 of the accompanying drawings:
The pipe bending anti-friction device comprises a base 1, a clamping die 2 and a cylindrical swivel base 3; the rotating seat 3 is fixed on the base 1, specifically, the upper and lower surfaces of the rotating seat 3 are both fixed with rotating shafts 31, and the rotating shaft 31 below the rotating seat 3 is fixed with the base 1. A circle of grooves 32 for placing the pipe fittings are arranged on the side wall of the swivel base 3. Specifically see fig. 2, two otic placodes 21 are formed at the left end of the clamping die 2, the swivel mount 3 is located between the two otic placodes 21, and the rotating shaft 31 above the swivel mount 3 passes through the otic placode 21 above and is rotationally connected with the otic placode 21, and the swivel mount 3 passes through the otic placode 21 below and is rotationally connected with the otic placode 21, thereby realizing the rotational connection of the swivel mount 3 and the otic placode 21. The left end face of the clamping die 2 is provided with an arc-shaped groove section 22 which can be matched with the groove 32, so that a pipe fitting can pass through between the groove 32 and the arc-shaped groove section 22.
The rotary seat 3 is internally provided with a lubrication barrel 4, a feed pipe 5 for adding lubricant into the lubrication barrel 4, a discharge pipe for guiding the lubricant in the lubrication barrel 4 into the groove 32 and a return pipe for returning the lubricant in the groove 32 into the lubrication barrel 4; a piston 41 is slidably connected in the lubrication barrel 4, a reset piece 42 for resetting the piston 41 is fixed between the piston 41 and the inner wall of the lubrication barrel 4, and the reset piece 42 is a spring. The end part of the feeding pipe 5 is provided with a blocking cover 51, and the blocking cover 51 is in threaded connection with the inlet of the feeding pipe 5, so that the feeding pipe 5 is conveniently closed; when the feed pipe 5 is required to be opened, the blocking cover 51 is rotated and taken out from the inlet of the feed pipe 5.
The method comprises the following steps: the discharging pipe comprises a main pipe 6 and a branch pipe 61, and one end of the main pipe 6 is communicated with the bottom of the lubrication barrel 4; the sub-pipe 61 comprises a vertical pipe 611 and a plurality of transverse pipes 612 which are perpendicular to and communicate with the vertical pipe 611; the other end of the main pipe 6 is communicated with the vertical pipe 611; the orifice of the cross tube 612 is located on the wall of the recess 32.
The flow control rods 8 are arranged in the transverse pipes 612, and one ends of the flow control rods 8 are fixed with flow control discs 83 with diameters larger than the diameters of the transverse pipes 612; the flow control disc 83 is positioned in the vertical pipe 611, and a return spring 84 is arranged between the flow control disc 83 and the inner wall of the vertical pipe 611; the other end of the flow control rod 8 extends into the groove 32.
The flow control lever 8 includes a lever body 81 and a buffer ball 82 fixed to an end of the lever body 81, and the other end of the lever body 81 is fixed to a flow control disc 83. The diameter of the buffer balls 82 is smaller than the diameter of the cross tube 612; and the buffer balls 82 are located in the grooves 32; the buffer ball 82 in the present embodiment is made of plastic; in addition, the pipe fitting of buckling in this scheme is the tubular metal resonator, and then guarantees that the hardness of plastics is less than the hardness of pipe fitting.
The return pipe comprises a main return pipe 7 and a plurality of branch return pipes 71 communicated with the main return pipe 7, and the main return pipe 7 is communicated with the lubricating barrel 4; the branch return pipe 71 communicates to the lower portion of the recess 32.
The rotary seat 3 is provided with an arc opening 33, a sliding rod 331 is connected in the arc opening 33 in a sliding way, and the upper end of the sliding rod 331 is fixed with an ear plate 21 positioned at the upper part of the left end of the clamping die 2; the lower end of the sliding rod 331 is rotatably connected with a roller 3311; a plurality of wedge blocks 411 are fixed on the upper surface of the piston 41 at intervals and are circumferentially arranged along the center of the piston 41, and the inclined surfaces of the wedge blocks 411 face the roller 3311; and the roller 3311 may contact the inclined surface of the wedge 411 and push the piston 41 to move downward; and the roller 3311 rolls from the lower end of the inclined surface of the wedge 411 to the upper end when rolling.
When the pipe fitting bending device is used, one end of the pipe fitting is held by hand, the other end of the pipe fitting is gradually placed between the groove 32 and the arc-shaped groove section 22, in the process, the pipe fitting can squeeze the buffer ball 82, and then the buffer ball 82 moves towards the arrow direction in fig. 4, one part of the buffer ball 82 gradually enters the transverse pipe 612, the other part of the buffer ball 82 is in contact with the inner side of the pipe fitting, the contact surface between the pipe fitting and the groove wall of the groove 32 in the bending process is reduced, and friction is further reduced. In addition, the buffer balls 82 provide a small gap between the inner side of the cross tube 612 and the wall of the groove 32, and facilitate the lubricant to enter between the wall of the groove 32 and the outer wall of the inner side of the pipe.
By rotating the clamping die 2, the pipe fitting can be bent along the groove 32 of the swivel base 3, and then the bent pipe is formed. In addition, in order to ensure that the bending degree of each pipe is consistent when the pipe is bent in batches; when the sliding rod 331 abuts against the mouth wall at the other end of the arc-shaped mouth 33, the clamping die 2 is not pushed any more, and the consistency of the bending degree is further ensured; in addition, the arc length of the arc-shaped opening 33 herein may be set as desired.
In addition, the clamping die 2 can drive the sliding rod 331 to move in the rotating process; but also can make the roller 3311 under the sliding rod 331 move along with the sliding rod 331, and the direction of the movement of the roller 3311 is the direction indicated by the arrow in fig. 3; the roller 3311 intermittently contacts with the surface of the wedge 411 in the moving process, and when the roller 3311 moves along the surface of the wedge 411, the piston 41 is pushed to move downwards so as to squeeze the lubricant in the lubrication barrel 4, the lubricant flows out of the discharge pipe, the lubricant flows between the contact surfaces of the pipe fitting and the groove 32, and the inner side of the pipe fitting is smeared with the lubricant while the pipe fitting is bent; the condition that the inner side of the pipe fitting is extruded and the bending precision of the pipe fitting is insufficient due to the action of friction force is reduced. When the roller 3311 moves away from the wedge 411, the return member 42 (spring) moves the piston 41 upward and returns to its original position, and when the piston 41 moves upward, the lubricant at the orifice of the return pipe is sucked into the lubrication tub 4.
The foregoing is merely exemplary of the present application, and specific structures and features that are well known in the art are not described in detail herein. It should be noted that modifications and improvements can be made by those skilled in the art without departing from the structure of the present application, and these should also be considered as the scope of the present application, which does not affect the effect of the implementation of the present application and the utility of the patent. The protection scope of the present application is subject to the content of the claims, and the description of the specific embodiments and the like in the specification can be used for explaining the content of the claims.
Claims (5)
1. The pipe bending anti-friction device comprises a base, a clamping die and a swivel base; the method is characterized in that: the rotary seat is fixed on the base, and a circle of groove for placing the pipe fitting is formed in the side wall of the rotary seat; two ear plates are fixed at one end of the clamping die, and the rotary seat is positioned between the two ear plates;
The rotating shafts are fixed on the upper surface and the lower surface of the rotating seat, the rotating shaft above the rotating seat passes through the ear plate above and is rotationally connected with the ear plate, and the rotating shaft below the rotating seat passes through the ear plate below and is rotationally connected with the ear plate;
The end part of the clamping die is provided with an arc-shaped groove section which is used for being matched with the groove to form a circular channel for a pipe fitting to pass through;
The rotary seat is internally provided with a lubrication barrel, a feed pipe for adding lubricant into the lubrication barrel, a discharge pipe for guiding the lubricant in the lubrication barrel into the groove and a return pipe for returning the lubricant in the groove into the lubrication barrel; a piston is connected in the lubrication barrel in a sliding way, and a reset piece for resetting the piston is fixed between the piston and the inner wall of the lubrication barrel; a blocking cover is arranged at the end part of the feeding pipe;
An arc opening is formed in the rotary seat, a sliding rod is connected in the arc opening in a sliding mode, and the upper end of the sliding rod is fixed with one of the lug plates; the lower end of the sliding rod is rotationally connected with a roller; the upper surface of the piston is provided with a plurality of wedge blocks at intervals along the circumferential direction of the center of the piston, and the inclined surfaces of the wedge blocks face the roller; and the roller is used for contacting with the inclined surface of the wedge block and pushing the piston to move downwards.
2. The pipe bending antifriction apparatus of claim 1 wherein: the discharging pipe comprises a main pipe and a branch pipe, and one end of the main pipe is communicated with the bottom of the lubrication barrel; the branch pipes comprise a vertical pipe and a plurality of transverse pipes which are vertical to the vertical pipe and are communicated with the vertical pipe; the other end of the main pipe is communicated with the vertical pipe.
3. The pipe bending antifriction apparatus of claim 2 wherein: the return pipe comprises a main return pipe and a plurality of branch return pipes communicated with the main return pipe, and the main return pipe is communicated with the lubricating barrel; the branch return pipe is communicated to the lower part of the groove.
4. A pipe bending antifriction apparatus in accordance with claim 2 or 3 wherein: a flow control rod is arranged in each transverse pipe, and one end of the flow control rod is fixed with a flow control disc with the diameter larger than that of the transverse pipe; the flow control disc is positioned in the vertical pipe, and a return spring is arranged between the flow control disc and the inner wall of the vertical pipe; the other end of the flow control rod extends into the groove.
5. The pipe bending antifriction apparatus of claim 4 wherein: the flow control rod comprises a rod body and a buffer ball positioned at the end part of the rod body, and the diameter of the buffer ball is smaller than that of the transverse tube; and the buffer ball is positioned in the groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810786314.7A CN108856389B (en) | 2018-07-17 | 2018-07-17 | Anti-friction equipment for bending pipe fitting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810786314.7A CN108856389B (en) | 2018-07-17 | 2018-07-17 | Anti-friction equipment for bending pipe fitting |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108856389A CN108856389A (en) | 2018-11-23 |
| CN108856389B true CN108856389B (en) | 2024-06-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810786314.7A Active CN108856389B (en) | 2018-07-17 | 2018-07-17 | Anti-friction equipment for bending pipe fitting |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108856389B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109433876B (en) * | 2018-12-28 | 2020-06-30 | 南通艾卡制冷设备有限公司 | Bending machine material blocking device with lubricating oil recovery function and recovery method |
| CN113547006A (en) * | 2021-07-26 | 2021-10-26 | 王扬 | Pipe bending equipment for automobile |
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| CA2221324A1 (en) * | 1997-11-17 | 1999-05-17 | Eagle Precision Technologies Inc. | Tub bending apparatus and method |
| DE102005041518A1 (en) * | 2005-08-31 | 2007-03-01 | Schunk Gmbh & Co. Kg Spann- Und Greiftechnik | Chuck for clamping workpieces in a lathe comprises a pump plunger arranged in each pocket of the chuck body in a cylinder bore of a conveying element forming a plunger chamber |
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| CN108856389A (en) | 2018-11-23 |
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Effective date of registration: 20240426 Address after: 250400 No. 49, north of Huxi street, Jinshui street, Pingyin County, Jinan City, Shandong Province Applicant after: Meide Yachang (Jinan) Pipe Industry Co.,Ltd. Country or region after: China Address before: 401329 Land Fort, 7th Community, Phase I Factory Building, Hailong Village Economic Development Center, Baishiyi Town, Jiulongpo District, Chongqing City Applicant before: CHONGQING XIANGYUE PIPE PARTS MANUFACTURING CO.,LTD. Country or region before: China |
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