CN102836683A - Self-tightening type packing box seal displacement buffer, and loop reactor - Google Patents
Self-tightening type packing box seal displacement buffer, and loop reactor Download PDFInfo
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- CN102836683A CN102836683A CN2012103405481A CN201210340548A CN102836683A CN 102836683 A CN102836683 A CN 102836683A CN 2012103405481 A CN2012103405481 A CN 2012103405481A CN 201210340548 A CN201210340548 A CN 201210340548A CN 102836683 A CN102836683 A CN 102836683A
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Abstract
The invention discloses a self-tightening type packing box seal displacement buffer and a loop reactor provided with the self-tightening type packing box seal displacement buffer, wherein the self-tightening type packing box seal displacement buffer further comprises an inclined sealing body based on the prior art; the inclined sealing body is connected with the outer wall surface of an inner pipe, and the outer side surface of the inclined sealing body is closely placed against the packing. The self-tightening type packing box seal displacement buffer used in the loop reactor is the above self-tightening type packing box seal displacement buffer. The self-tightening type packing box seal displacement buffer provided by the invention not only has the property of absorbing moving of expanding and shrinking but also has three sealing functions comprising a primary seal of a rubber seal ring, a dynamic seal of the packing and a self-tightening type seal of the inclined seal body after the packing is extruded, the dynamic sealing is enhanced, therefore, compared with the packing box type double-seal-structure displacement buffer in the prior art, the self-tightening type packing box seal displacement buffer has advantages of higher sealing reliability and better self-tightening property due to the added seal enhancement.
Description
Technical field
The present invention relates to the petrochemical industry equipment special technology in the mechanized equipment engineering, particularly relate to a kind of self-tightening type packing box seal displacement buffer and have the annular-pipe reactor of this self-tightening type packing box seal displacement buffer.
Background technology
Annular-pipe reactor is mainly as polypropylene and poly production equipment in the petrochemical industry, also is common in the production equipments such as mud cooler in the petrochemical industry, butylene cooler.
In the prior art; Common annular-pipe reactor includes according to it and looks the chuck communicating pipe, elbow and the tie-beam that include some straight connectors and correspondence that the production capacity size is provided with; Wherein, per two straight connectors are managed in it with two elbows are corresponding one by one and are serially connected in one successively and are communicated with runner.Because of polymerisation is exothermic reaction; Can produce great amount of heat; Therefore the chuck runner that pipe and outer tube formed in set straight connector had, and through being positioned at the chuck communicating pipe that the elbow is connected with outer tube, with the chuck runner one by one correspondence be serially connected in a connection runner successively.Cooling medium through in the chuck runner is taken away reaction heat.Also be provided with corrugated-type expansion joint, erection support and a beam seat on the outer tube of straight connector, tie-beam is connected with a beam seat through bolt, connects straight connector the annular-pipe reactor that is combined into a space framework.Make annular-pipe reactor become many foundation supports structure thus, promptly every straight connector is all by set erection support supporting corresponding with it.
For example; The structure of 300,000 tons/year the polyacrylic annular-pipe reactor of production; As shown in Figure 1; Including six, each is long for 50m, external diameters are straight connector R1, R2, R3, R4, R5, the R6 of 710 mm, and corresponding one by one being connected in series successively with the interior pipe of straight connector of five 180 ° big elbow A1, A2, A3, B1, B2,90 ° of elbows that centre-to-centre spacing is 4200 mm, elbow connects and form the runner that is communicated with of a circulation integral body; And through being positioned at five chuck communicating pipe C1, C2, C3, C4, the C5 that the elbow is connected with outer tube, the chuck runner that interior pipe and outer tube are formed is corresponding one by one to be serially connected in one successively and to be communicated with runner; Cooling medium is got into by the cooling medium inflow entrance 2A of chuck runner, and to the cooling medium flow export 2F outflow of chuck runner, six erection support D1, D2, D3, D4, D5, D6 are positioned at the bottom of each straight connector R1, R2, R3, R4, R5, R6.The elbow, bottom of annular-pipe reactor is provided with axial-flow pump; Reaction mass gets into annular-pipe reactor by reaction mass inflow entrance 1A; Under the driving of axial-flow pump, reaction mass stirs in straight connector, circulates, and under the effect of catalyst; After reacting the polypropylene that forms pulpous state, release the entering granulating system by reaction mass flow export 1B again; This annular-pipe reactor is seated on the high platform base of 11m, heavily about 210 tons of whole equipment.
Annular-pipe reactor of the prior art; Straight connector is provided with the structure of displacement buffer; The height of straight connector is 50m, is positioned at pipeline section on the straight connector of straight connector of the long section in erection support top, is provided with wave number and is three corrugated-type expansion joint formula displacement buffer; Be positioned at the straight connector lower tube section of the straight connector of the short section in erection support bottom; Be provided with wave number and be one corrugated-type expansion joint formula displacement buffer, corrugated-type expansion joint formula displacement buffer all is arranged on the outer tube, and the two ends of the interior pipe of straight connector are connected with flange respectively and are connected with elbow.
But; When the height of straight connector surpasses 60m; The interior pipe of corresponding straight connector and the displacement difference of expanding with heat and contract with cold between the outer tube also will increase, if only depend on the absorption of corrugated-type expansion joint formula displacement buffer and the buffering displacement difference of said structure different, then needed wave number can increase gradually.For example wave number increases to four perhaps more than four; Yet along with the increase of the wave number of expansion joint waveform, its whole accuracy of manufacture can be more and more lower, and be easy to generate inhomogeneous between each waveform; Cause occurrence of waste through regular meeting; Its fatigue resistance is also relatively poor simultaneously, and the life-span is also shorter, makes task performance more and more cannot say for sure to demonstrate,prove.And the thickness of the housing welding of corrugated-type expansion joint formula displacement buffer and outer tube has certain requirement, can not be too thin, because thickness increases, make cost increase.Therefore, this single corrugated-type expansion joint formula displacement buffer especially is not suitable for the annular-pipe reactor of the length of straight connector greater than the large scale structure of 60m.
Thereupon; The applicant has applied for that on December 15th, 2010 name is called the application for a patent for invention of " reactor with displacement buffering "; This technical scheme " said straight connector in said, manage and said outer tube between be provided be used to absorb said in the displacement buffer of the displacement of expanding with heat and contract with cold between pipe and the said outer tube; said displacement buffer is connected with said outer tube; said displacement buffer is the displacement buffer of stuffing-box formula double sealing structure, perhaps the displacement buffer of stuffing-box formula double sealing structure and corrugated-type expansion joint formula displacement buffer.The displacement buffer of said stuffing-box formula double sealing structure includes packing press ring, sealed letter, packing filling, rubber seal and securing member; One section of said packing press ring compress said packing filling in the inboard of said sealed letter and said in gap between the outside wall surface of pipe; Another section of said packing press ring is connected with said sealed letter through said securing member; Said sealed letter is connected with said outer tube; Said rubber seal is arranged at the inboard of said sealed letter and the gap between the said interior outside wall surface of managing, and is positioned at the below of said packing filling." in the technique scheme; because the displacement buffer of stuffing-box formula double sealing structure only has the double sealing structure of sealing of dynamic seal (packing) and the rubber seal of packing filling; its sealing property is slightly poor; and the dynamic seal (packing) function of packing filling can not well bring into play, and reduced its sealing property.
Therefore, to deficiency of the prior art, need badly provide a kind of sealing reliability higher, from sigma compactness better packing box seal displacement buffer and have the annular-pipe reactor of this packing box seal displacement buffer.
Summary of the invention
The objective of the invention is to avoid weak point of the prior art and provide a kind of sealing reliability higher, from the better self-tightening type packing box seal of sigma compactness displacement buffer and have the annular-pipe reactor of this self-tightening type packing box seal displacement buffer.
The invention provides a kind of self-tightening type packing box seal displacement buffer; Comprise packing press ring, sealed letter, packing filling, rubber seal and securing member; Said packing press ring and said sealed letter cooperatively interact, and a section of said packing press ring compresses the gap of said packing filling between the outside wall surface of the inboard of said sealed letter and interior pipe, and another section of said packing press ring is connected with said sealed letter through said securing member; Said sealed letter is connected with outer tube; Said rubber seal is arranged at the gap between the outside wall surface of inboard and interior pipe of said sealed letter, and is positioned at the below of said packing filling, wherein; Also comprise the inclination seal, said inclination seal is connected with the outside wall surface of interior pipe and the lateral surface of said inclination seal closely is connected to said packing filling.
Wherein, said inclination seal is by square sealing surface 360 ° of conical ring seals that form of excircle wall rotation along interior pipe.
Wherein, the gradient of said square sealing surface is set to (2: 100)～(10: 100).
Wherein, the gradient of said square sealing surface is set to 3: 100.
Wherein, the outside wall surface of said inclination seal and interior pipe is one-body molded.
Wherein, the outside wall surface of pipe in said inclination seal is welded in.
Wherein, Said sealed letter is set to have the sealed letter in L type cross section; Said packing press ring is set to have the packing press ring in L type cross section; First section end face of the packing press ring in the said L of having type cross section compress said packing filling in the inboard of the sealed letter in the said L of having type cross section and said in gap between the outside wall surface of pipe; First section of second section of the packing press ring in the said L of the having type cross section sealed letter through stud nut and the said L of having type cross section is fixedly connected; The sealed letter and the outer tube in the said L of having type cross section are welded to connect, and said rubber seal is arranged at the gap between the outside wall surface of second section inboard and interior pipe of sealed letter in the said L of having type cross section, and are positioned at the below of said packing filling.
Wherein, said rubber seal is the rubber seal of П type.
The present invention also provides a kind of annular-pipe reactor; Include straight connector, chuck communicating pipe, elbow and erection support; Pipe and outer tube in said straight connector includes; Said elbow with said in pipe be serially connected in successively reaction mass conveying and reaction be communicated with runner; Said chuck communicating pipe be positioned at said elbow and be connected with said outer tube, the chuck runner that forms between pipe in said and the said outer tube is connected into the runner that is communicated with of conveying cooling medium, said erection support is arranged at said outer tube bottom makes said straight connector be divided into pipeline section and straight connector lower tube section on the straight connector; Said straight connector in said, manage and said outer tube between be provided be used to absorb said in the displacement buffer of the displacement of expanding with heat and contract with cold between pipe and the said outer tube; Said displacement buffer is connected with said outer tube, and wherein, said displacement buffer is above-mentioned described self-tightening type packing box seal displacement buffer.
Beneficial effect of the present invention:
Self-tightening type packing box seal displacement buffer of the present invention is applied to annular-pipe reactor, except having the performance that absorbs the displacement of expanding with heat and contract with cold, also has the triple seal function, and one is the primary seal of rubber seal; Two is the dynamic seal (packing) of packing filling; Three is the self-energized seal after the inclination seal pushes for packing filling, therefore, compares with the displacement buffer of stuffing-box formula double sealing structure of the prior art, has increased sealing together more and has strengthened, and makes sealing reliability higher, better from sigma compactness.
Description of drawings
Utilize accompanying drawing that the present invention is described further, but the embodiment in the accompanying drawing do not constitute any restriction of the present invention,, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to following accompanying drawing for those of ordinary skill in the art.
Fig. 1 is the structural representation of the annular-pipe reactor of prior art.
Fig. 2 is the structural representation of the embodiment 1 of a kind of self-tightening type packing box seal displacement buffer of the present invention.
In Fig. 1, include:
R1, R2, R3, R4, R5, R6---straight connector, A1, A2, A3, B1, B2, B3---elbow,
C1, C2, C3, C4, C5---chuck communicating pipe, D1, D2, D3, D4, D5, D6---erection support,
2A---cooling medium inflow entrance, 2F---cooling medium flow export,
1A---reaction mass inflow entrance, 1B---reaction mass flow export.
In Fig. 2, include:
11---interior pipe, 12---outer tube,
3---the inclination seal,
51---packing press ring,
511---have first section of packing press ring of L type cross section,
512---have second section of packing press ring of L type cross section,
52---sealed letter,
521---first section, 522 of sealed letter with L type cross section---second section, 523 of sealed letter with L type cross section---be inboard,
53---packing filling, 54---rubber seal,
55---securing member, 551---double-screw bolt, 552---nuts.
The specific embodiment
In conjunction with following examples the present invention is further described.
Embodiment 1
The specific embodiment of a kind of self-tightening type packing box seal displacement buffer of the present invention; As shown in Figure 2; Comprise packing press ring 51, sealed letter 52, packing filling 53, rubber seal 54 and securing member 55; Said packing press ring 51 cooperatively interacts with said sealed letter 52, and a section of said packing press ring 51 compresses the gap of said packing filling 53 between the outside wall surface of the inboard 523 of said sealed letter 52 and interior pipe 11, and another section of said packing press ring 51 is passed through said securing member 55 and is connected with said sealed letter 52; Said sealed letter 52 is connected with outer tube 12; Said rubber seal 54 is arranged at the gap between the outside wall surface of inboard 523 and interior pipe 11 of said sealed letter 52, and is positioned at the below of said packing filling 53, wherein; Also comprise inclination seal 3, said inclination seal 3 is connected with the outside wall surface of interior pipe 11 and the lateral surface of said inclination seal 3 closely is connected to said packing filling 53.
Compared with prior art, the self-tightening type packing box seal displacement buffer that the present invention adopted has the triple seal function, and one is the primary seal of rubber seal 54; Two is the dynamic seal (packing) of packing filling 53; Three is the self-energized seal after inclination seal 3 pushes for packing filling 53, has increased sealing together more and has strengthened, and makes sealing reliability higher, better from sigma compactness.
Concrete, said inclination seal 3 is by square sealing surface 360 ° of conical ring seals that form of excircle wall rotation along interior pipe 11.
Concrete, the gradient of said square sealing surface is set to (2: 100)～(10: 100).Can guarantee the extruding force of seal 3, make its packing filling 53 have better dynamic sealing performance for packing filling 53.
Concrete, the gradient of said square sealing surface is set to 3: 100.Can guarantee the extruding force of seal 3 for packing filling 53.
Concrete, said inclination seal 3 is one-body molded with the outside wall surface of interior pipe 11.The machined precision is high.
Concrete, the outside wall surface of pipe 11 in said inclination seal 3 is welded in.Preferably weld through the mode of spot welding.
Concrete; Said sealed letter 52 is set to have the sealed letter 52 in L type cross section; Said packing press ring 51 is set to have the packing press ring 51 in L type cross section; First section 511 end face of the packing press ring in the said L of having type cross section compress said packing filling 53 in the inboard 523 of the sealed letter 52 in the said L of having type cross section and said in gap between the outside wall surface of pipe 11; First section 521 of second section 512 of the packing press ring in the said L of the having type cross section sealed letter through double-screw bolt 551 nuts 552 and the said L of having type cross section is fixedly connected; The sealed letter 52 in the said L of having type cross section is welded to connect with outer tube 12, and said rubber seal 54 is arranged at the gap between the outside wall surface of second section 522 inboard and interior pipe 11 of sealed letter in the said L of having type cross section, and is positioned at the below of said packing filling 53.First section 521 of sealed letter with L type cross section is provided with internal thread hole; Second section 512 of packing press ring with L type cross section; When nut 552 is screwed around double-screw bolt 551; Feasible first section 511 end face with the packing press ring in L type cross section produces a pressure to packing filling 53, forces tight packing filling 53 in sealed letter 52, to form secondary seal, simultaneously in first section 521 the screwed hole that is screwed into the sealed letter with L type cross section of double-screw bolt 551.Outer tube 12 welding of first section 521 and second sections knuckle position and straight connector with the sealed letter in L type cross section; Rubber seal 54 is arranged at the gap between the outside wall surface of interior pipe 11 of second section 522 end face and straight connector of the sealed letter with L type cross section; Rubber seal 54 is arranged at the below of packing filling 53, forms primary seal.
Concrete, said rubber seal 54 is the rubber seal 54 of П type.In the time of in the medium in the chuck runner gets into П shape circle, pressure makes the rubber seal 54 of П type to the both sides distending, and the outside wall surface of pipe 11 realized sealing in its inboard tightly was adjacent to, and the inner surface that sealed letter 52 is tightly propped up in its outside is also realized sealing.
Because when equipment moves; The interior pipe 11 of straight connector will be extended by the effect of reaction heat, and outer tube 12 temperature are relatively low and its elongation is less relatively, therefore; Outer tube 12 at straight connector; The two sections straight connectors (being pipeline section and straight connector lower tube section on the straight connector) that are positioned at the erection support both sides are respectively arranged with the self-tightening type packing box seal displacement buffer that absorbs the displacement of expanding with heat and contract with cold between pipe 11 and the outer tube 12, and the space in it can seal between pipe 11 and the outer tube 12 does not allow the fluid media (medium) in the chuck runner to flow to the outside; Do not allow the air of outside to enter in the chuck runner yet; Meanwhile, the slip to axial in allowing between pipe 11 and the outer tube 12, the size of its slide displacement be exactly in both axial thermal expansion displacements of pipe 11 and outer tube 12 poor.Therefore, self-tightening type packing box seal displacement buffer is the buffer of displacement of expanding with heat and contract with cold, and is again the hermetically-sealed construction between interior pipe 11 and the outer tube 12.
Embodiment 2
The specific embodiment of a kind of annular-pipe reactor of the present invention; Include straight connector, chuck communicating pipe, elbow and erection support; Pipe 11 and outer tube 12 in said straight connector includes; Said elbow with said in pipe 11 be serially connected in successively reaction mass conveying and reaction be communicated with runner; Be positioned at said elbow said chuck communicating pipe and be connected with said outer tube 12, the chuck runner that forms between pipe 11 in said and the said outer tube 12 is connected into the runner that is communicated with of conveying cooling medium, said erection support is arranged at said outer tube 12 bottoms makes said straight connector be divided into pipeline section and straight connector lower tube section on the straight connector; Said straight connector in said, manage 11 and said outer tube 12 between be provided be used to absorb said in the displacement buffer of the displacement of expanding with heat and contract with cold between pipe 11 and the said outer tube 12; Said displacement buffer is connected with said outer tube 12, and wherein, said displacement buffer is the self-tightening type packing box seal displacement buffer described in the embodiment 1.
Concrete, self-tightening type packing box seal displacement buffer is arranged between the interior pipe 11 and outer tube 12 at top of pipeline section on the straight connector.Be arranged at the hydrostatic pressure that the top can avoid self-tightening type packing box seal displacement buffer to bear nearly 60m.
Self-tightening type packing box seal displacement buffer of the present invention can also be applied on the endless tube heat exchanger of endless tube heat exchanger or jacketed except being applied to annular-pipe reactor.
Should be noted that at last; Above embodiment is only in order to explain technical scheme of the present invention; But not to the restriction of protection domain of the present invention, although with reference to preferred embodiment the present invention has been done explanation at length, those of ordinary skill in the art is to be understood that; Can make amendment or be equal to replacement technical scheme of the present invention, and not break away from the essence and the scope of technical scheme of the present invention.
Claims (9)
1. self-tightening type packing box seal displacement buffer; Comprise packing press ring, sealed letter, packing filling, rubber seal and securing member; Said packing press ring and said sealed letter cooperatively interact; One section of said packing press ring compresses the gap of said packing filling between the outside wall surface of the inboard of said sealed letter and interior pipe, and another section of said packing press ring is connected with said sealed letter through said securing member, and said sealed letter is connected with outer tube; Said rubber seal is arranged at the gap between the outside wall surface of inboard and interior pipe of said sealed letter; And be positioned at the below of said packing filling, it is characterized in that: also comprise the inclination seal, said inclination seal is connected with the outside wall surface of interior pipe and the lateral surface of said inclination seal closely is connected to said packing filling.
2. a kind of self-tightening type packing box seal displacement buffer according to claim 1 is characterized in that: said inclination seal is the 360 ° of conical ring seals that form of excircle wall rotation by the interior pipe in square sealing surface edge.
3. a kind of self-tightening type packing box seal displacement buffer according to claim 2, it is characterized in that: the gradient of said square sealing surface is set to (2: 100)～(10: 100).
4. a kind of self-tightening type packing box seal displacement buffer according to claim 3, it is characterized in that: the gradient of said square sealing surface is set to 3: 100.
5. a kind of self-tightening type packing box seal displacement buffer according to claim 1, it is characterized in that: the outside wall surface of said inclination seal and interior pipe is one-body molded.
6. a kind of self-tightening type packing box seal displacement buffer according to claim 1 is characterized in that: the outside wall surface of pipe in said inclination seal is welded in.
7. a kind of self-tightening type packing box seal displacement buffer according to claim 1; It is characterized in that: said sealed letter is set to have the sealed letter in L type cross section; Said packing press ring is set to have the packing press ring in L type cross section; First section end face of the packing press ring in the said L of having type cross section compress said packing filling in the inboard of the sealed letter in the said L of having type cross section and said in gap between the outside wall surface of pipe; First section of second section of the packing press ring in the said L of the having type cross section sealed letter through stud nut and the said L of having type cross section is fixedly connected; The sealed letter and the outer tube in the said L of having type cross section are welded to connect; Said rubber seal is arranged at the gap between the outside wall surface of second section inboard and interior pipe of sealed letter in the said L of having type cross section, and is positioned at the below of said packing filling.
8. self-tightening type packing box seal displacement buffer according to claim 1, it is characterized in that: said rubber seal is the rubber seal of П type.
9. annular-pipe reactor; Include straight connector, chuck communicating pipe, elbow and erection support; Pipe and outer tube in said straight connector includes; Said elbow with said in pipe be serially connected in successively reaction mass conveying and reaction be communicated with runner; Said chuck communicating pipe being positioned at said elbow is connected with said outer tube; The chuck runner that forms between pipe in said and the said outer tube is connected into the runner that is communicated with of carrying cooling medium, and said erection support is arranged at said outer tube bottom makes said straight connector be divided into pipeline section and straight connector lower tube section on the straight connector, said straight connector in said, manage and said outer tube between be provided be used to absorb manage in said and said outer tube between the displacement buffer of the displacement of expanding with heat and contract with cold; Said displacement buffer is connected with said outer tube, it is characterized in that: said displacement buffer is each described self-tightening type packing box seal displacement buffer in claims 1 to 8.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210340548.1A CN102836683B (en) | 2012-09-14 | 2012-09-14 | Self-tightening type packing box seal displacement buffer, and loop reactor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210340548.1A CN102836683B (en) | 2012-09-14 | 2012-09-14 | Self-tightening type packing box seal displacement buffer, and loop reactor |
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| CN102836683A true CN102836683A (en) | 2012-12-26 |
| CN102836683B CN102836683B (en) | 2015-02-04 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114810674A (en) * | 2022-06-30 | 2022-07-29 | 四川绵竹川润化工有限公司 | Sealed liquid ammonia pump for liquid ammonia transportation |
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| CN102068951A (en) * | 2010-12-15 | 2011-05-25 | 茂名重力石化机械制造有限公司 | Circular pipe reactor with displacement buffering |
| CN102607956A (en) * | 2012-03-04 | 2012-07-25 | 茂名重力石化机械制造有限公司 | Self-tightening sealing pressure test tool for high-pressure steel tube |
| CN202803232U (en) * | 2012-09-14 | 2013-03-20 | 茂名重力石化机械制造有限公司 | Self-tightening type packing box seal displacement buffer and loop reactor |
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Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1076260A (en) * | 1992-03-07 | 1993-09-15 | 刘连甫 | The application of mechanical seal on high-vacuum installation |
| US5639098A (en) * | 1994-10-03 | 1997-06-17 | Duramax, Inc. | Adjustable seal for propeller drive shaft |
| CN1214111A (en) * | 1996-03-22 | 1999-04-14 | 加洛克公司 | Compact five ring stuffing box packing assembly |
| CN101334115A (en) * | 2007-06-26 | 2008-12-31 | 里希特化学技术有限公司 | Packing case |
| CN102068951A (en) * | 2010-12-15 | 2011-05-25 | 茂名重力石化机械制造有限公司 | Circular pipe reactor with displacement buffering |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114810674A (en) * | 2022-06-30 | 2022-07-29 | 四川绵竹川润化工有限公司 | Sealed liquid ammonia pump for liquid ammonia transportation |
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| CN102836683B (en) | 2015-02-04 |
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| C56 | Change in the name or address of the patentee | ||
| CP03 | Change of name, title or address |
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 |