CN102836683B - 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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- CN102836683B CN102836683B CN201210340548.1A CN201210340548A CN102836683B CN 102836683 B CN102836683 B CN 102836683B CN 201210340548 A CN201210340548 A CN 201210340548A CN 102836683 B CN102836683 B CN 102836683B
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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 mechanized equipment engineering, particularly relate to a kind of self-tightening type packing box seal displacement buffering device and there is the annular-pipe reactor of this self-tightening type packing box seal displacement buffering device.
Background technology
Annular-pipe reactor mainly as the polypropylene in petrochemical industry and poly production equipment, is also common in the production equipment such as the mud cooler in petrochemical industry, butylene cooler.
In prior art, common annular-pipe reactor includes according to its chuck communicating pipe including some straight connectors and correspondence depending on the setting of production capacity size, elbow and tie-beam, wherein, every two straight connectors are managed in the inner and are sequentially connected in series into one with two elbow one_to_one corresponding and are communicated with runner.Because polymerisation is exothermic reaction, a large amount of heats can be produced, therefore set straight connector has the chuck runner that interior pipe is formed with outer tube, and by being positioned at the chuck communicating pipe that elbow is connected with outer tube, chuck runner one_to_one corresponding is sequentially connected in series into a connection runner.By the cooling medium in chuck runner, reaction heat is taken away.The outer tube of straight connector is also provided with corrugated-type expansion joint, erection support and a beam seat, tie-beam is connected with a beam seat by bolt, straight connector Connecting groups is synthesized the annular-pipe reactor of a space framework.Make annular-pipe reactor become many foundation supports structure thus, namely every bar straight connector is all supported by set erection support corresponding thereto.
Such as, the structure of the polyacrylic annular-pipe reactor of production of 300000 tons/year, as shown in Figure 1, including six each length is 50m, external diameter is the straight connector R1 of 710 mm, R2, R3, R4, R5, R6, five centre-to-centre spacing are 180 ° of large elbow A1 of 4200 mm, A2, A3, B1, B2, 90 ° of elbows, elbow one_to_one corresponding and the interior pipe of straight connector are sequentially connected in series and connect and form one and circulate and overall be communicated with runner, and by being positioned at five chuck communicating pipe C1 that elbow is connected with outer tube, C2, C3, C4, C5, the chuck runner one_to_one corresponding interior pipe and outer tube formed is sequentially connected in series into one and is communicated with runner, cooling medium is entered by the cooling medium inflow entrance 2A of chuck runner, and the cooling medium flow export 2F to chuck runner flows out, and six erection supports 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 enters annular-pipe reactor by reaction mass inflow entrance 1A, under the driving of axial-flow pump, reaction mass stirs in straight connector, circulation, and under the effect of catalyst, after carrying out reacting the polypropylene forming pulpous state, then released by reaction mass flow export 1B and enter granulating system; This annular-pipe reactor is seated on the high platform base of 11m, whole equipment heavily about 210 tons.
Annular-pipe reactor of the prior art, straight connector is provided with the structure of displacement buffering device, the height of straight connector is 50m, pipeline section on the straight connector being positioned at the straight connector on longer section of erection support top, be provided with the corrugated-type expansion joint formula displacement buffering device that wave number is three, be positioned at the straight connector lower tube section of the straight connector of shorter section of erection support bottom, be provided with the corrugated-type expansion joint formula displacement buffering device that wave number is, corrugated-type expansion joint formula displacement buffering device is all arranged on outer tube, and the two ends of the interior pipe of straight connector are connected to flange and are connected with elbow.
But, when the height of straight connector is more than 60m, the displacement difference of expanding with heat and contract with cold between the inner and outer tubes of corresponding straight connector also will increase, if only lean on the absorption of the corrugated-type expansion joint formula displacement buffering device of said structure and cushion displacement difference different, then required wave number can increase gradually.Such as wave number increases to more than four or four; but the increase of wave number along with expansion joint waveform; the accuracy of manufacture of its entirety can be more and more lower; and easily produce uneven between each waveform; cause often there will be waste product; its fatigue resistance is also poor simultaneously, and the life-span is also shorter, makes task performance more and more be difficult to ensure card.And the thickness of the case weld of corrugated-type expansion joint formula displacement buffering device and outer tube has certain requirement, can not be too thin, because thickness increases, cost is increased.Therefore, the length that this single corrugated-type expansion joint formula displacement buffering device is not especially suitable for straight connector is greater than the annular-pipe reactor of the large scale structure of 60m.
Thereupon, the applicant has applied on December 15th, 2010 application for a patent for invention that name is called " having the reactor of displacement buffering ", this technical scheme is " described straight connector is provided with the displacement buffering device for absorbing the displacement of expanding with heat and contract with cold between described interior pipe and described outer tube between described interior pipe and described outer tube; described displacement buffering device is connected with described outer tube; described displacement buffering device is the displacement buffering device of stuffing box type double sealing structure, or the displacement buffering device of stuffing box type double sealing structure and corrugated-type expansion joint formula displacement buffering device.The displacement buffering device of described stuffing box type double sealing structure includes packing press ring, sealed letter, packing filling, rubber seal and securing member, one section of described packing press ring compresses the gap of described packing filling between the inner side of described sealed letter and the outside wall surface of described interior pipe, another section of described packing press ring is connected with described sealed letter by described securing member, described sealed letter is connected with described outer tube, described rubber seal is arranged at the gap between the inner side of described sealed letter and the outside wall surface of described interior pipe, and is positioned at the below of described packing filling." in technique scheme; the displacement buffering device due to stuffing box type double sealing structure only has the double sealing structure of the dynamic seal (packing) of packing filling and the sealing of rubber seal; its sealing property is slightly poor; and the dynamic seal (packing) function of packing filling can not well play, and reduces its sealing property.
Therefore, for deficiency of the prior art, need badly provide a kind of sealing reliability higher, from sigma compactness better packing box seal displacement buffering device and the annular-pipe reactor with this packing box seal displacement buffering device.
Summary of the invention
The object of the invention is to avoid weak point of the prior art and provide a kind of sealing reliability higher, from sigma compactness better self-tightening type packing box seal displacement buffering device and the annular-pipe reactor with this self-tightening type packing box seal displacement buffering device.
The invention provides a kind of self-tightening type packing box seal displacement buffering device, comprise packing press ring, sealed letter, packing filling, rubber seal and securing member, described packing press ring and described sealed letter cooperatively interact, one section of described packing press ring compresses the gap of described packing filling between the inner side of described sealed letter and the outside wall surface of interior pipe, another section of described packing press ring is connected with described sealed letter by described securing member, described sealed letter is connected with outer tube, described rubber seal is arranged at the gap between the inner side of described sealed letter and the outside wall surface of interior pipe, and be positioned at the below of described packing filling, wherein, also comprise inclined seal body, described inclined seal body is connected with the outside wall surface of interior pipe, and the lateral surface of described inclined seal body is closely connected to described packing filling.
Wherein, described inclined seal body is the conical ring seal formed along the excircle wall rotating 360 degrees of interior pipe by square sealing surface.
Wherein, the gradient of described square sealing surface is set to (2: 100) ~ (10: 100).
Wherein, the gradient of described square sealing surface is set to 3: 100.
Wherein, the outside wall surface of described inclined seal body and interior pipe is one-body molded.
Wherein, described inclined seal body is welded in the outside wall surface of interior pipe.
Wherein, described sealed letter is set to the sealed letter with L-type cross section, described packing press ring is set to the packing press ring with L-type cross section, the described end face with the first paragraph of the packing press ring in L-type cross section compresses described packing filling in the described gap had between the inner side of the sealed letter in L-type cross section and the outside wall surface of described interior pipe, the described second segment with the packing press ring in L-type cross section is fixedly connected with the described first paragraph with the sealed letter in L-type cross section by stud nut, described there is L-type cross section sealed letter and outer tube be welded to connect, there is described in described rubber seal is arranged at the gap between the inner side of the second segment of the sealed letter in L-type cross section and the outside wall surface of interior pipe, and be positioned at the below of described packing filling.
Wherein, described rubber seal is the rubber seal of П type.
Present invention also offers a kind of annular-pipe reactor, include straight connector, chuck communicating pipe, elbow and erection support, described straight connector includes inner and outer tubes, described elbow and described interior pipe are sequentially connected in series into the conveying of reaction mass and the connection runner of reaction, described chuck communicating pipe be positioned at described elbow to be connected with described outer tube, described interior pipe and the chuck runner formed between described outer tube are connected into carry cooling medium be communicated with runner, described erection support is arranged at described outer tube bottom makes described straight connector be divided into pipeline section and straight connector lower tube section on straight connector, described straight connector is provided with the displacement buffering device for absorbing the displacement of expanding with heat and contract with cold between described interior pipe and described outer tube between described interior pipe and described outer tube, described displacement buffering device is connected with described outer tube, wherein, described displacement buffering device is self-tightening type packing box seal displacement buffering device described above.
Beneficial effect of the present invention:
Self-tightening type packing box seal displacement buffering device of the present invention is applied to annular-pipe reactor, except have absorb expand with heat and contract with cold displacement performance except, also have triple seal function, one is the primary seal of rubber seal; Two is the dynamic seal (packing) of packing filling; Three is the self-energized seal after inclined seal body extrudes for packing filling, therefore, compared with the displacement buffering device of stuffing box type double sealing structure of the prior art, adds one sealing more and strengthens, make sealing reliability higher, better from sigma compactness.
Accompanying drawing explanation
The invention will be further described to utilize accompanying drawing, but the embodiment in accompanying drawing does not form any limitation of the invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, can also obtain other accompanying drawing according to the following drawings.
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 buffering device of the present invention.
Include in FIG:
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.
Include in fig. 2:
11---interior pipe, 12---outer tube,
3---inclined seal body,
51---packing press ring,
511---have the first paragraph of the packing press ring in L-type cross section,
512---have the second segment of the packing press ring in L-type cross section,
52---sealed letter,
521---there is the first paragraph of the sealed letter in L-type cross section, 522---there is the second segment of the sealed letter in L-type cross section, 523---inner side,
53---packing filling, 54---rubber seal,
55---securing member, 551---stud, 552---nuts.
Detailed description of the invention
The invention will be further described with the following Examples.
embodiment 1
The detailed description of the invention of a kind of self-tightening type packing box seal displacement buffering device 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, described packing press ring 51 cooperatively interacts with described sealed letter 52, one section of described packing press ring 51 compresses the gap of described packing filling 53 between the inner side 523 and the outside wall surface of interior pipe 11 of described sealed letter 52, another section of described packing press ring 51 is connected with described sealed letter 52 by described securing member 55, described sealed letter 52 is connected with outer tube 12, described rubber seal 54 is arranged at the gap between the inner side 523 of described sealed letter 52 and the outside wall surface of interior pipe 11, and be positioned at the below of described packing filling 53, wherein, also comprise inclined seal body 3, described inclined seal body 3 is connected with the outside wall surface of interior pipe 11, and the lateral surface of described inclined seal body 3 is closely connected to described packing filling 53.
Compared with prior art, self-tightening type packing box seal displacement buffering device of the present invention, has 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 inclined seal body 3 extrudes for packing filling 53, adds one sealing more and strengthens, make sealing reliability higher, better from sigma compactness.
Concrete, described inclined seal body 3 is the conical ring seal formed along the excircle wall rotating 360 degrees of interior pipe 11 by square sealing surface.
Concrete, the gradient of described square sealing surface is set to (2: 100) ~ (10: 100).The extruding force of inclined seal body 3 for packing filling 53 can be ensured, make its packing filling 53 have better dynamic sealing performance.
Concrete, the gradient of described square sealing surface is set to 3: 100.The extruding force of inclined seal body 3 for packing filling 53 can be ensured.
Concrete, described inclined seal body 3 is one-body molded with the outside wall surface of interior pipe 11.Machining accuracy is high.
Concrete, described inclined seal body 3 is welded in the outside wall surface of interior pipe 11.Mode preferably by spot welding is welded.
Concrete, described sealed letter 52 is set to the sealed letter 52 with L-type cross section, described packing press ring 51 is set to the packing press ring 51 with L-type cross section, the described end face with the first paragraph 511 of the packing press ring in L-type cross section compresses described packing filling 53 in the described gap had between the inner side 523 of the sealed letter 52 in L-type cross section and the outside wall surface of described interior pipe 11, the described second segment 512 with the packing press ring in L-type cross section is fixedly connected with the described first paragraph 521 with the sealed letter in L-type cross section by stud 551 nut 552, the described sealed letter 52 with L-type cross section is welded to connect with outer tube 12, there is described in described rubber seal 54 is arranged at the gap between the inner side of the second segment 522 of the sealed letter in L-type cross section and the outside wall surface of interior pipe 11, and be positioned at the below of described packing filling 53.The first paragraph 521 with the sealed letter in L-type cross section is provided with internal thread hole, there is the second segment 512 of the packing press ring in L-type cross section, when nut 552 screws around stud 551, the end face of the first paragraph 511 of the packing press ring with L-type cross section is made to produce a pressure to packing filling 53, tight packing filling 53 is forced to form secondary seal in sealed letter 52, in the screwed hole of the simultaneously first paragraph 521 being screwed into the sealed letter with L-type cross section of stud 551.There is the first paragraph 521 of the sealed letter in L-type cross section weld with the outer tube 12 of straight connector with the knuckle position of second segment, rubber seal 54 is arranged at the gap between the outside wall surface of the end face of the second segment 522 of the sealed letter with L-type cross section and the interior pipe 11 of straight connector, rubber seal 54 is arranged at the below of packing filling 53, forms primary seal.
Concrete, described rubber seal 54 is the rubber seal 54 of П type.When the medium in chuck runner enters in П shape circle, pressure makes the rubber seal 54 of П type to both sides distending, and the outside wall surface being tightly adjacent to interior pipe 11 inside it realizes sealing, and the inner surface tightly propping up sealed letter 52 outside it also realizes sealing.
Due to when equipment runs, the interior pipe 11 of straight connector will extend by the effect of reaction heat, outer tube 12 temperature is relatively low and its elongation is relatively little, therefore, at the outer tube 12 of straight connector, the two sections of straight connectors (i.e. pipeline section and straight connector lower tube section on straight connector) being positioned at erection support both sides are respectively arranged with the self-tightening type packing box seal displacement buffering device absorbing displacement of expanding with heat and contract with cold between pipe 11 and outer tube 12, it can close the space between interior pipe 11 and outer tube 12, the fluid media (medium) in chuck runner is not allowed to flow to outside, the air of outside is not allowed to enter in chuck runner yet, meanwhile, slip to axial in allowing between pipe 11 and outer tube 12, the size of its slide displacement is exactly the difference of the axial thermal expansion displacement of interior pipe 11 and both outer tubes 12.Therefore, self-tightening type packing box seal displacement buffering device 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 outer tube 12.
embodiment 2
The detailed description of the invention of a kind of annular-pipe reactor of the present invention, include straight connector, chuck communicating pipe, elbow and erection support, described straight connector includes interior pipe 11 and outer tube 12, described elbow is sequentially connected in series into the conveying of reaction mass and the connection runner of reaction with described interior pipe 11, described chuck communicating pipe be positioned at described elbow to be connected with described outer tube 12, described interior pipe 11 and the chuck runner formed between described outer tube 12 are connected into carry cooling medium be communicated with runner, described erection support is arranged at described outer tube 12 bottom makes described straight connector be divided into pipeline section and straight connector lower tube section on straight connector, described straight connector is provided with the displacement buffering device for absorbing the displacement of expanding with heat and contract with cold between described interior pipe 11 and described outer tube 12 between described interior pipe 11 and described outer tube 12, described displacement buffering device is connected with described outer tube 12, wherein, described displacement buffering device is the self-tightening type packing box seal displacement buffering device described in embodiment 1.
Concrete, self-tightening type packing box seal displacement buffering device is arranged between the interior pipe 11 at the top of pipeline section on straight connector and outer tube 12.Being arranged at top can avoid self-tightening type packing box seal displacement buffering device to bear the hydrostatic pressure of nearly 60m.
Self-tightening type packing box seal displacement buffering device of the present invention, except being applied to annular-pipe reactor, can also be applied on the endless tube heat exchanger of endless tube heat exchanger or jacketed.
Finally should be noted that; above embodiment is only in order to illustrate technical scheme of the present invention; but not limiting the scope of the invention; although done to explain to the present invention with reference to preferred embodiment; those of ordinary skill in the art is to be understood that; can modify to technical scheme of the present invention or equivalent replacement, and not depart from essence and the scope of technical solution of the present invention.
Claims (5)
1. a self-tightening type packing box seal displacement buffering device, comprise packing press ring, sealed letter, packing filling, rubber seal and securing member, described packing press ring and described sealed letter cooperatively interact, one section of described packing press ring compresses the gap of described packing filling between the inner side of described sealed letter and the outside wall surface of interior pipe, another section of described packing press ring is connected with described sealed letter by described securing member, described sealed letter is connected with outer tube, described rubber seal is arranged at the gap between the inner side of described sealed letter and the outside wall surface of interior pipe, and be positioned at the below of described packing filling, it is characterized in that: also comprise inclined seal body, described inclined seal body is connected with the outside wall surface of interior pipe, and the lateral surface of described inclined seal body is closely connected to described packing filling, self-energized seal is formed for after packing filling extruding to make inclined seal body, described inclined seal body is the conical ring seal formed along the excircle wall rotating 360 degrees of interior pipe by square sealing surface, the gradient of described square sealing surface is set to (2: 100) ~ (10: 100), one-body molded or the described inclined seal body of the outside wall surface of described inclined seal body and interior pipe is welded in the outside wall surface of interior pipe.
2. a kind of self-tightening type packing box seal displacement buffering device according to claim 1, is characterized in that: the gradient of described square sealing surface is set to 3: 100.
3. a kind of self-tightening type packing box seal displacement buffering device according to claim 1, it is characterized in that: described sealed letter is set to have the sealed letter in L-type cross section, described packing press ring is set to the packing press ring with L-type cross section, the described end face with the first paragraph of the packing press ring in L-type cross section compresses described packing filling in the described gap had between the inner side of the sealed letter in L-type cross section and the outside wall surface of described interior pipe, the described second segment with the packing press ring in L-type cross section passes through stud, nut is fixedly connected with the described first paragraph with the sealed letter in L-type cross section, described there is L-type cross section sealed letter and outer tube be welded to connect, there is described in described rubber seal is arranged at the gap between the inner side of the second segment of the sealed letter in L-type cross section and the outside wall surface of interior pipe, and be positioned at the below of described packing filling.
4. self-tightening type packing box seal displacement buffering device according to claim 1, is characterized in that: described rubber seal is the rubber seal of П type.
5. an annular-pipe reactor, include straight connector, chuck communicating pipe, elbow and erection support, described straight connector includes inner and outer tubes, described elbow and described interior pipe are sequentially connected in series into the conveying of reaction mass and the connection runner of reaction, described chuck communicating pipe be positioned at described elbow to be connected with described outer tube, described interior pipe and the chuck runner formed between described outer tube are connected into carry cooling medium be communicated with runner, described erection support is arranged at described outer tube bottom makes described straight connector be divided into pipeline section and straight connector lower tube section on straight connector, described straight connector is provided with the displacement buffering device for absorbing the displacement of expanding with heat and contract with cold between described interior pipe and described outer tube between described interior pipe and described outer tube, described displacement buffering device is connected with described outer tube, it is characterized in that: the self-tightening type packing box seal displacement buffering device of described displacement buffering device according to any one of claims 1 to 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210340548.1A CN102836683B (en) | 2012-09-14 | 2012-09-14 | Self-tightening type packing box seal displacement buffer, and loop reactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| 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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| Publication Number | Publication Date |
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| CN102836683A CN102836683A (en) | 2012-12-26 |
| CN102836683B true CN102836683B (en) | 2015-02-04 |
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| CN114810674B (en) * | 2022-06-30 | 2022-11-29 | 四川绵竹川润化工有限公司 | Sealed liquid ammonia pump for liquid ammonia transportation |
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| 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 |
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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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| 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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| CN102836683A (en) | 2012-12-26 |
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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 |