CN205166116U - Heat exchanger diaphragm seals welding seam welding machine - Google Patents
Heat exchanger diaphragm seals welding seam welding machine Download PDFInfo
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- CN205166116U CN205166116U CN201520974005.4U CN201520974005U CN205166116U CN 205166116 U CN205166116 U CN 205166116U CN 201520974005 U CN201520974005 U CN 201520974005U CN 205166116 U CN205166116 U CN 205166116U
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- heat exchanger
- guide rail
- weld seam
- diaphragm seal
- bobbin carriage
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Abstract
The utility model provides a heat exchanger diaphragm seals welding seam welding machine, the welding machine includes the ring guide rail of locating tub frame of case tip, locating the frame, and welding set, be equipped with the guide rail tooth on the ring guide rail, welding set includes the welder frame, locate the welder and the wire drive feed unit of welder frame, and locate the welder frame, and with guide rail tooth complex guide rail gear, under the drive effect of power supply, welder along ring guide rail rotary motion. Compared with the prior art, the welding of this welding machine is efficient, seal quality uniformity is good, the welding seam is even, and simple structure, makes things convenient for the dismouting, can improve the equipment quality of tub case tip and pipe case end cover simultaneously.
Description
Technical field
The application relates to the tubular heat exchanger technical field of heat-exchange energy-saving device-specific of petroleum refining and chemical industry, Coal Chemical Industry, chemical fertilizer industry, air-conditioning, air cooling, electric power facility, particularly relates to heat exchanger diaphragm seal weld seam bonding machine and welding method.
Background technology
In prior art, tubular heat exchanger is a kind of heat exchanger be most widely used, be widely used in the convection heat transfer' heat-transfer by convection of " liquid---liquid " in the fields such as chemical industry, oil, medicine, food, light industry, metallurgy, coking, " vapour---vapour ", " vapour---liquid " heat exchange, and the heat exchange condensation flow process such as steam-condensation and liquid evaporation heat transfer.
Tubular heat exchanger of the prior art is made up of main members such as tube bank, shell and bobbin carriages usually, wherein, bobbin carriage is the vitals of tubular heat exchanger, generally speaking, the pressure and temperature of tube side is all higher than shell side, and bobbin carriage is connected to heat exchanger tube and the tube sheet of tube bank in less structure space, tube side is imported and exported and dividing plate, stressed complexity, the easy deformed damaged of part, causes in high parameter medium and leaks or leak outside.The tubular heat exchanger of HTHP of the prior art, inflammable and explosive or poisonous medium, in order to avoid the leakage of flow process material, even if it imports and exports adapter, bore is very little, is usually also designed to the mode of the direct butt welding with pipeline, and does not adopt the mode of Flange joint; Equally, in order to avoid the leakage of flow process material, also weld between the shell of bigbore tube sheet and its both sides and bobbin carriage cylinder, so, bobbin carriage end just can not with also adopt the mode of welding between end cap, mainly consider and facilitate maintainer can enter to carry out the first-class repair work of detector tube from bobbin carriage end.
Thereupon, people are devoted to the research of the better hermetically-sealed construction between bobbin carriage end with bobbin carriage end cap except welded seal is connected always, sphere diaphragm seal technology is arisen at the historic moment, namely the sphere diaphragm seal dish of the increase between bobbin carriage end and bobbin carriage end cap, this sphere diaphragm seal dish is the hermetically-sealed construction of a shallow arch, specifically includes the plain cushion side ring being arranged at middle sphere diaphragm and the globally outer circumferential sides setting of diaphragm; Without the need to welding between bobbin carriage end and bobbin carriage end cap, but plain cushion side ring and bobbin carriage end are sealed by weld seam; Middle sphere diaphragm can along with the fluctuation of pressure Flexible change between arch and plane two kinds of versions, and when increasing from its overall diameter during arch complanation, when replying arch from plane, its overall diameter reduces.Like this, owing to have employed seal weld between plain cushion side ring and bobbin carriage end, and the radial deformation compensation rate of sphere diaphragm seal dish under HTHP effect and tube case end bore are to the uniformity of port displacement, solve above-mentioned inharmonic problem of expanding with heat and contract with cold preferably, there is good seal performance, structure is simple, the manufacturing cycle is short, low cost and other advantages.
But, existingly adopt manual operation for the seal weld between plain cushion side ring and bobbin carriage end, not only welding efficiency is low, welded seal difficult quality guarantee is consistent, and weld seam is uneven, thus affect the assembling quality of bobbin carriage end and bobbin carriage end cap.
Summary of the invention
The object of the application is to avoid weak point of the prior art and provides that a kind of welding efficiency is high, welded seal quality conformance is good, even weld, and structure simple, facilitate installation and removal, heat exchanger diaphragm seal weld seam bonding machine and the welding method of the assembling quality of bobbin carriage end and bobbin carriage end cap can be improved simultaneously.
The object of the application is achieved through the following technical solutions:
provideheat exchanger diaphragm seal weld seam bonding machine, it comprises frame, is arranged at the annulus guide rail of described frame and welder; Described erecting is placed in bobbin carriage end, and described annulus guide rail is provided with guide rail tooth, and described welder comprises gun rack, is arranged at welding gun and the wire feeder of described gun rack, and is arranged at described gun rack and the track gear coordinated with described guide rail tooth;
Under the driving effect of power source, described welding gun is along the rotary motion of described annulus guide rail.
Wherein, described heat exchanger diaphragm seal weld seam bonding machine is anchored on the screwed hole of bobbin carriage end by described frame by the stud nut of heat exchanger bobbin carriage.
Wherein, described frame is by the periphery described heat exchanger diaphragm seal weld seam bonding machine being anchored on bobbin carriage end of bolting on.
Wherein, described erecting is equipped with the adjustment spoke of Intermediate Gray chute, and described frame is fixed on bobbin carriage end by described adjustment spoke.
Wherein, the quantity of described adjustment spoke is set to the multiple of four, and described adjustment spoke equidistantly distributes on described annulus guide rail.
Wherein, described welding gun is arc welding gun or argon-arc welding gun.
Wherein, described power source is that driven by power or blast drive.
Wherein, the power line of described power source is furnished with anti-tangle support.
additionally provideheat exchanger diaphragm seal weld seam welding method, it adopts heat exchanger diaphragm seal weld seam bonding machine described above, and this heat exchanger diaphragm seal weld seam bonding machine comprises frame, is arranged at the annulus guide rail of described frame and welder; Described erecting is placed in bobbin carriage end, and described annulus guide rail is provided with guide rail tooth, and described welder comprises gun rack, is arranged at welding gun and the wire feeder of described gun rack, and is arranged at described gun rack and the track gear coordinated with described guide rail tooth; Under the driving effect of power source, described welding gun is along the rotary motion of described annulus guide rail, and described heat exchanger diaphragm seal weld seam bonding machine is anchored on the screwed hole of bobbin carriage end by described frame by the stud nut of heat exchanger bobbin carriage.Concrete steps comprise, pull down heat exchanger bobbin carriage end cap, utilize the stud nut of heat exchanger bobbin carriage that described heat exchanger diaphragm seal weld seam bonding machine is anchored on the screwed hole of bobbin carriage end, this heat exchanger diaphragm seal weld seam bonding machine is under the driving effect of power source, with welding gun along the rotary motion of annulus guide rail, with by complete for seal-weld welding attractive in appearance.
additionally provideheat exchanger diaphragm seal weld seam welding method, it adopts heat exchanger diaphragm seal weld seam bonding machine described above, and this heat exchanger diaphragm seal weld seam bonding machine comprises frame, is arranged at the annulus guide rail of described frame and welder; Described erecting is placed in bobbin carriage end, and described annulus guide rail is provided with guide rail tooth, and described welder comprises gun rack, is arranged at welding gun and the wire feeder of described gun rack, and is arranged at described gun rack and the track gear coordinated with described guide rail tooth; Under the driving effect of power source, described welding gun is along the rotary motion of described annulus guide rail, and described heat exchanger diaphragm seal weld seam bonding machine is anchored on the periphery of bobbin carriage end by described frame by bolting on.Concrete steps comprise, pull down heat exchanger bobbin carriage end cap, utilizing bolts on is anchored on the periphery of bobbin carriage end by described heat exchanger diaphragm seal weld seam bonding machine, this heat exchanger diaphragm seal weld seam bonding machine is under the driving effect of power source, with welding gun along the rotary motion of annulus guide rail, with by complete for seal-weld welding attractive in appearance.
the beneficial effect of the application:
The heat exchanger diaphragm seal weld seam bonding machine of the application, it comprises frame, is arranged at the annulus guide rail of described frame and welder; Described erecting is placed in bobbin carriage end, and described annulus guide rail is provided with guide rail tooth, and described welder comprises gun rack, is arranged at welding gun and the wire feeder of described gun rack, and is arranged at described gun rack and the track gear coordinated with described guide rail tooth; Under the driving effect of power source, described welding gun is along the rotary motion of described annulus guide rail.Compared with prior art, this heat exchanger diaphragm seal weld seam bonding machine welding efficiency is high, welded seal quality conformance is good, even weld, and structure simple, facilitate installation and removal, the assembling quality of bobbin carriage end and bobbin carriage end cap can be improved simultaneously.The heat exchanger diaphragm seal weld seam welding method of the application, comprise and pull down heat exchanger bobbin carriage end cap, utilize the stud nut of heat exchanger bobbin carriage that described heat exchanger diaphragm seal weld seam bonding machine is anchored on the screwed hole of bobbin carriage end, or utilizing bolts on is anchored on the periphery of bobbin carriage end by described heat exchanger diaphragm seal weld seam bonding machine, this heat exchanger diaphragm seal weld seam bonding machine is under the driving effect of power source, with welding gun along the rotary motion of annulus guide rail, with by complete for seal-weld welding attractive in appearance.This welding method is simple, convenient operation, can improve assembling quality and the welding quality of bobbin carriage end and bobbin carriage end cap, can also industrially carry out popularizing on a large scale and promoting simultaneously.
Accompanying drawing explanation
Utilize accompanying drawing to be described further the application, but the embodiment in accompanying drawing does not form any restriction to the application, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to the following drawings.
Fig. 1 is the structural representation of a kind of tubular heat exchanger of the prior art.
Fig. 2 is the partial structurtes schematic diagram of a kind of tubular heat exchanger of the prior art.
Fig. 3 is the structural representation of the heat exchanger diaphragm seal weld seam bonding machine of the application.
Fig. 4 is a kind of structural representation that the heat exchanger diaphragm seal weld seam bonding machine of the application is applied to heat exchanger.
Fig. 5 is the another kind of structural representation that the heat exchanger diaphragm seal weld seam bonding machine of the application is applied to heat exchanger.
Include in Fig. 1, Fig. 2, Fig. 3, Fig. 4 and Fig. 5:
1---bobbin carriage cylindrical, 2---tube bank, 3---shell, 4---bobbin carriage, 5---tube sheet, 6---sphere diaphragm seal dish, 61---sphere diaphragm, 62---plain cushion side ring, 7---bobbin carriage end cap, 8---stud nut, 9---bobbin carriage end, 91---screwed hole, 10---seal-welds
12---frame, 13---welder, 14---welding gun, 15---adjustment spoke, 16---annulus guide rail, 17---------bolt on power line, 19 track gear, 18 by gun rack, 20---anti-tangle support, 21---.
Detailed description of the invention
With the following Examples the application is described in further detail.
embodiment 1
One of detailed description of the invention of the heat exchanger diaphragm seal weld seam bonding machine of the application, this heat exchanger diaphragm seal weld seam bonding machine is applied to the welding of heat exchanger diaphragm seal weld seam 10, shown in Fig. 1 and Fig. 2 of the prior art, heat exchanger includes tube bank 2, shell 3 and bobbin carriage 4, tube bank 2 is arranged in tube sheet 5, wherein: bobbin carriage 4 is provided with sphere diaphragm seal dish 6, sphere diaphragm seal dish 6 is arranged between bobbin carriage end 9 and bobbin carriage end cap 7; Sphere diaphragm seal dish 6 includes the plain cushion side ring 62 being arranged at middle sphere diaphragm 61 and the globally outer circumferential sides setting of diaphragm 61; Plain cushion side ring 62 and bobbin carriage end 9 are sealed by seal-weld 10; Bobbin carriage end 9 is fixedly connected with by stud nut 8 with bobbin carriage end cap 7.
The improvement of the application is: innovatively have developed heat exchanger diaphragm seal weld seam bonding machine, be specifically designed to the seal-weld 10 between the above-mentioned plain cushion side ring 62 of welding and bobbin carriage end 9, this heat exchanger diaphragm seal weld seam bonding machine, shown in figure 3 and Fig. 4, it comprises frame 12, is arranged at the annulus guide rail 16 of described frame 12, and welder 13; Described frame 12 is arranged at bobbin carriage end 9, described annulus guide rail 16 is provided with guide rail tooth, described welder 13 comprises gun rack 19, is arranged at welding gun 14 and the wire feeder of described gun rack 19, and is arranged at described gun rack 19 and the track gear 17 coordinated with described guide rail tooth; Under the driving effect of power source, described welding gun 14 is along the rotary motion of described annulus guide rail 16.Bonding machine, can complete for seal-weld 10 welding attractive in appearance under power drive with welding gun 14 continuous rotation.Compared with prior art, this heat exchanger diaphragm seal weld seam bonding machine welding efficiency is high, welded seal quality conformance is good, even weld, and structure simple, facilitate installation and removal, the assembling quality of bobbin carriage end 9 and bobbin carriage end cap 7 can be improved simultaneously.In addition, this heat exchanger diaphragm seal weld seam bonding machine can also be utilized, suitable transformation is carried out to the hermetically-sealed construction of bobbin carriage end 9.
Concrete, described heat exchanger diaphragm seal weld seam bonding machine is anchored on the screwed hole 91 of bobbin carriage end 9 by described frame 12 by the stud nut 8 of heat exchanger bobbin carriage 4.The original stud nut 8 of fixing employing of this bonding machine, fully saves cost, is fixed more stable, firm simultaneously, welding process is stablized more, guarantees that seal-weld 10 uniformity consistency welded is good with original stud nut 8.
Concrete, described welding gun 14 is arc welding gun or argon-arc welding gun.One scheme is under the driving effect of power source, and arc welding gun carries out rotary motion quickly along the circumference of annulus guide rail 16, carries out arc welding weld seam; Its two scheme is under the driving effect of power source, and argon-arc welding gun carries out more slowly circular motion along the circumference of annulus guide rail 16, carries out argon arc welding weld seam.
Concrete, described power source is that driven by power or blast drive.The power line 18 of corresponding connection is power line or airduct; To be applicable to the occasion in different dynamic source.
Concrete, the power line 18 of described power source is furnished with anti-tangle support 20.Avoid in circular motion, power line 18 being wound around.
embodiment 2
The detailed description of the invention two of the heat exchanger diaphragm seal weld seam bonding machine of the application, the main technical schemes of the present embodiment is identical with embodiment 1, in the present embodiment unaccounted feature, adopts the explanation in embodiment 1, no longer repeats at this.The difference of the present embodiment and embodiment 1 is, shown in figure 3, described frame 12 is provided with the adjustment spoke 15 of Intermediate Gray chute, and described frame 12 is fixed on bobbin carriage end 9 by described adjustment spoke 15.In general, bobbin carriage end 9 manhole is relatively fixedly designed to the excursion of 500mm to 700mm, the radially flexible excursion of screwed hole 91 center circle at 600mm to 800mm being applicable to bobbin carriage end 9 of adjustment spoke 15, but above-mentioned excursion can be changed according to design needs.
Concrete, the quantity of described adjustment spoke 15 is set to the multiple of four, and described adjustment spoke 15 equidistantly distributes on described annulus guide rail 16.So-called multiple is the multiple from 1, and the setting of adjustment spoke 15 makes more stable fixing of annulus guide rail 16, simultaneously corresponding with the adjustment spoke 15 that arranges of the multiple quantity that can arrange with the vessel flange bolt hole specified in national standard of four.
embodiment 3
The detailed description of the invention three of the heat exchanger diaphragm seal weld seam bonding machine of the application, the main technical schemes of the present embodiment is identical with embodiment 1, in the present embodiment unaccounted feature, adopts the explanation in embodiment 1, no longer repeats at this.The difference of the present embodiment and embodiment 1 is, described frame 12 does not need with the installation of bobbin carriage 4 screwed hole 91 utilizing bobbin carriage end 9.But with reference to shown in figure 5, described frame 12 21 to be fastened on the bobbin carriage cylindrical 1 of bobbin carriage end 9 by bolting on.If desired the situation of visual screwed hole 91 suitably increase bolt on 21 quantity to strengthen coupling stiffness.
embodiment 4
The detailed description of the invention four of the heat exchanger diaphragm seal weld seam bonding machine of the application, the main technical schemes of the present embodiment is identical with embodiment 3, in the present embodiment unaccounted feature, adopts the explanation in embodiment 3, no longer repeats at this.The difference of the present embodiment and embodiment 3 is, described frame 12 is provided with the adjustment spoke 15 of Intermediate Gray chute, and described frame 12 is fixed on bobbin carriage end 9 by described adjustment spoke 15.In general, bobbin carriage end 9 manhole is relatively fixedly designed to the excursion of 500mm to 700mm, the radially flexible excursion of screwed hole 91 center circle at 600mm to 800mm being applicable to bobbin carriage end 9 of adjustment spoke 15, but above-mentioned excursion can be changed according to design needs.
Concrete, the quantity of described adjustment spoke 15 is set to the multiple of four, and described adjustment spoke 15 equidistantly distributes on described annulus guide rail 16.So-called multiple is the multiple from 1, and the setting of adjustment spoke 15 makes more stable fixing of annulus guide rail 16, simultaneously corresponding with the adjustment spoke 15 that arranges of the multiple quantity that can arrange with the vessel flange bolt hole specified in national standard of four.
embodiment 5
One of detailed description of the invention of the heat exchanger diaphragm seal weld seam welding method of the application, adopt the heat exchanger diaphragm seal weld seam bonding machine described in above-described embodiment 1, concrete steps comprise, pull down heat exchanger bobbin carriage end cap 7, utilize the stud nut 8 of heat exchanger bobbin carriage 4 that described heat exchanger diaphragm seal weld seam bonding machine is anchored on the screwed hole 91 of bobbin carriage end 9, this heat exchanger diaphragm seal weld seam bonding machine is under the driving effect of power source, with welding gun 14 along annulus guide rail 16 rotary motion, with by complete for seal-weld 10 welding attractive in appearance.This welding method is simple, convenient operation, can improve assembling quality and the welding quality of bobbin carriage end 9 and bobbin carriage end cap 7, can also industrially carry out popularizing on a large scale and promoting simultaneously.
Concrete, unclamp stud nut 8, after pulling down bobbin carriage end cap 7, by stud nut 8, frame 12 is fastened on the original screwed hole 91 in bobbin carriage end 9, if annulus guide rail 16 and welder 13 have been installed in frame 12 originally, then connect power line 18 and be communicated with power source, test running also debugs smooth movements.Wherein, to first observe or measure the groove excursion of seal-weld 10 when installing welding gun 14, noting making the extension elongation of welding gun 14 inexcessive.
embodiment 6
The detailed description of the invention two of the heat exchanger diaphragm seal weld seam welding method of the application, adopt the heat exchanger diaphragm seal weld seam bonding machine described in above-described embodiment 3, concrete steps comprise, pull down heat exchanger bobbin carriage end cap 7, utilize 21 peripheries described heat exchanger diaphragm seal weld seam bonding machine being anchored on bobbin carriage end 9 of bolting on, this heat exchanger diaphragm seal weld seam bonding machine is under the driving effect of power source, with welding gun 14 along annulus guide rail 16 rotary motion, with by complete for seal-weld 10 welding attractive in appearance.This kind of scheme retains original screwed hole 91, makes bobbin carriage end cap 7 unaffected with being tightly connected of bobbin carriage end 9.This welding method is simple, convenient operation, can improve assembling quality and the welding quality of bobbin carriage end 9 and bobbin carriage end cap 7, can also industrially carry out popularizing on a large scale and promoting simultaneously.
Concrete, unclamp stud nut 8, after pulling down bobbin carriage end cap 7, the periphery of bobbin carriage end 9 is fastened to by 21 frames 12 of bolting on, if annulus guide rail 16 and welder 13 have been installed in frame 12 originally, then connect power line 18 and be communicated with power source, test running has also debugged smooth movements.Wherein, to first observe or measure the groove excursion of seal-weld 10 when installing welding gun 14, noting making the extension elongation of welding gun 14 inexcessive.
Finally should be noted that; above embodiment is only in order to illustrate the technical scheme of the application; but not the restriction to the application's protection domain; although done to explain to the application with reference to preferred embodiment; those of ordinary skill in the art is to be understood that; can modify to the technical scheme of the application or equivalent replacement, and not depart from essence and the scope of technical scheme.
Claims (8)
1. heat exchanger diaphragm seal weld seam bonding machine, is characterized in that: comprise frame, be arranged at the annulus guide rail of described frame and welder; Described erecting is placed in bobbin carriage end, and described annulus guide rail is provided with guide rail tooth, and described welder comprises gun rack, is arranged at welding gun and the wire feeder of described gun rack, and is arranged at described gun rack and the track gear coordinated with described guide rail tooth;
Under the driving effect of power source, described welding gun is along the rotary motion of described annulus guide rail.
2. heat exchanger diaphragm seal weld seam bonding machine according to claim 1, is characterized in that: described heat exchanger diaphragm seal weld seam bonding machine is anchored on the screwed hole of bobbin carriage end by described frame by the stud nut of heat exchanger bobbin carriage.
3. heat exchanger diaphragm seal weld seam bonding machine according to claim 1, is characterized in that: described heat exchanger diaphragm seal weld seam bonding machine is anchored on the periphery of bobbin carriage end by described frame by bolting on.
4. heat exchanger diaphragm seal weld seam bonding machine according to any one of claim 1 to 3, it is characterized in that: described erecting is equipped with the adjustment spoke of Intermediate Gray chute, described frame is fixed on bobbin carriage end by described adjustment spoke.
5. heat exchanger diaphragm seal weld seam bonding machine according to claim 4, it is characterized in that: the quantity of described adjustment spoke is set to the multiple of four, and described adjustment spoke equidistantly distributes on described annulus guide rail.
6. heat exchanger diaphragm seal weld seam bonding machine according to claim 1, is characterized in that: described welding gun is arc welding gun or argon-arc welding gun.
7. heat exchanger diaphragm seal weld seam bonding machine according to claim 1, is characterized in that: described power source is that driven by power or blast drive.
8. heat exchanger diaphragm seal weld seam bonding machine according to claim 7, is characterized in that: the power line of described power source is furnished with anti-tangle support.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520974005.4U CN205166116U (en) | 2015-11-30 | 2015-11-30 | Heat exchanger diaphragm seals welding seam welding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520974005.4U CN205166116U (en) | 2015-11-30 | 2015-11-30 | Heat exchanger diaphragm seals welding seam welding machine |
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| CN205166116U true CN205166116U (en) | 2016-04-20 |
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| CN201520974005.4U Active CN205166116U (en) | 2015-11-30 | 2015-11-30 | Heat exchanger diaphragm seals welding seam welding machine |
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| CN (1) | CN205166116U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105436662A (en) * | 2015-11-30 | 2016-03-30 | 茂名重力石化机械制造有限公司 | Diaphragm seal weld joint welding machine for heat exchanger and welding method |
| CN109848595A (en) * | 2017-11-03 | 2019-06-07 | 金门建筑有限公司 | Welding system and method |
| CN111438491A (en) * | 2020-05-20 | 2020-07-24 | 王嘉 | Automatic welding processing equipment for metal heat-insulating pipeline connection |
-
2015
- 2015-11-30 CN CN201520974005.4U patent/CN205166116U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105436662A (en) * | 2015-11-30 | 2016-03-30 | 茂名重力石化机械制造有限公司 | Diaphragm seal weld joint welding machine for heat exchanger and welding method |
| CN109848595A (en) * | 2017-11-03 | 2019-06-07 | 金门建筑有限公司 | Welding system and method |
| CN111438491A (en) * | 2020-05-20 | 2020-07-24 | 王嘉 | Automatic welding processing equipment for metal heat-insulating pipeline connection |
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Address after: 525024 Guangdong City, Maoming Province Ring West Road, No. 91 Patentee after: Maoming gravity Petrochemical Equipment Co Ltd Address before: 525024 Maoming City, Guangdong Province West Road, Maoming City, the gravity of the Petrochemical Machinery Manufacturing Co., Ltd., Patentee before: The Challenge Petrochemical Machinery Corporation |