CN103016891A - Combined-type powdered coal pipeline compensation device - Google Patents
Combined-type powdered coal pipeline compensation device Download PDFInfo
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- CN103016891A CN103016891A CN2012103369466A CN201210336946A CN103016891A CN 103016891 A CN103016891 A CN 103016891A CN 2012103369466 A CN2012103369466 A CN 2012103369466A CN 201210336946 A CN201210336946 A CN 201210336946A CN 103016891 A CN103016891 A CN 103016891A
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Abstract
The invention discloses a combined-type powdered coal pipeline compensation device, which consists of a centered sleeve type expansion joint and two corrugated expansion joints, wherein the two corrugated expansion joints are respectively and coaxially connected at both ends and are equal in caliber. Axial through holes are respectively and evenly distributed in radial annular plates respectively at both ends of each corrugated pipe; a sphere seat is arranged in each axial through hole; one double-thread screw is connected in series and axially and tightly spliced with the two sphere seats respectively at both ends of each corresponding corrugated pipe to form a hinge joint structure; the axial movement of each corrugated pipe is limited by the corresponding hinge joint structure, and the lateral displacement of a powdered coal pipeline is only assorted with flexible absorption of the corrugated expansion joints. Right ends of outer pipes of the two corrugated expansion joints are coaxially connected with a ring stand; rollers which are adjustable in radial position are evenly distributed on the right end face of the ring stand; and the rollers axially roll along outer walls of inner pipes to form an external guide structure. In order to further improve the quality of the axial displacement of the inner pipes, screw bolt assemblies connected in the radial direction are evenly distributed on ring pipe walls of the left ends of the inner pipes to form an internal guide structure. The combined-type powdered coal pipeline compensation device disclosed by the invention is clear in division of axial compensation and lateral compensation, flexible in compensation, high in compensation dosage and good in sealing effect.
Description
Technical field
The present invention relates to a kind of pipe line compensating device, specifically, the present invention relates to a kind of combined coal powder pipe line compensating device, this device is comprised of two kinds of dissimilar compensators, belongs to pipe safety device technique field.
Background technique
Large-scale coal-fired station boiler capacity is large, body of heater is high, hot three-dimensional swell increment is large, therefore the supporting hot shift value of pipeline is also larger, need the effectively thermal walking of absorption boiler burner interface and pulverized coal channel of supporting pulverized coal channel compensator, do not produce again excessive stress, also will make things convenient for installation and operation maintenance.At present, the industry is to address the above problem the Three-D compensator of developing a kind of composite structure, and namely two spherical compensators and a sleeve expansion joint are combined into one, can absorb simultaneously ± 6
0～9
0Lateral displacement and the axial displacement of 100mm～250mm.But such compensator does not have axially directed structure, mainly relies on moving axially of inner core opposite shell.Axial seal between inner tube and shell is secondary installs that coaxality is poor must to cause uneven wear, consequently worsens sealing effect, so such compensator is higher to the adjustment required precision of installing.China Patent No. ZL2008200587487 discloses the three-dimensional combined coal powder pipe compensator that a kind of axially directed ability is strong, resistance to motion is little, it is combined by two identical corrugated expansion joint and telescopic sleeve compensators of structure, and this structure adopts roller structure to improve the axially directed performance issue of compensator.But there is following shortcoming:
The first, 4～8 of the exterior roller structure pairs of guide plates directly are welded on the hoop circumference in the pressure head flange outside, and roller is installed between every pair of guide plate, this structure radially can't be adjusted, if foozle is arranged, 4～8 rollers of this roller structure can not contact fully with the outer wall of described inner core, do not have inner tube effective location and axially directed effect, sometimes also might bring inner core and shell assembling disalignment problem, make on the contrary stuffing box packing produce eccentric wear.Equally, also there is same problem in the roller structure that is located at inner core the inner.
The second, the supporting sleeve expansion joint of this compensator is installed in the middle of two corrugated expansion joints, play a part adapter, when piping produces lateral displacement, because the defective of axially directed structure, sleeve expansion joint sealing place very easily produces crooked, produces off-centre and causes leakage.In addition, the spacing of two guide rollers is shorter, and for slightly large drift diameter pipeline, its major diameter is smaller, does not have axially directed effect.
Three, the supporting sleeve expansion joint stuffing box packing of this compensator is pieced together by screw bolt and nut and is pressed head and seal, and after the stuffing box packing wearing and tearing, pressure head is loosening, and the roller structure that is welded on above the pressure head has also lost its effect.When again compressing pressure head, roller structure blocks the inner tube phenomenon in the compaction process, and this type of phenomenon occurs repeatedly with the wearing and tearing meeting of stuffing box packing.
Four, during the compensating motion of this type of compensator own, radial rigidity only has 1/5～1/20 of axial rigidity, during radial compensation, in case stressedly namely occur crookedly, causes telescopic sleeve to mend inner core and the outer sleeve eccentric wear of device.
Summary of the invention
The present invention is mainly for the deficiencies in the prior art, propose a kind of simple in structure, compensating movement flexibly, the combined coal powder pipe line compensating device of displacement rational division of labor.This device utilizes double threaded screw and ball seat to be hinged by the nose balance ability of axially directed Structure Improvement sleeve expansion joint on the other hand, and the restriction corrugated expansion joint is only made lateral displacement, does not do axial displacement.
The present invention is achieved through the following technical solutions technical goal.
The combined coal powder pipe line compensating device, it is connected the corrugated expansion joint of the identical bore of connection by sleeve expansion joint placed in the middle and jointly forms with two ends.Described corrugated expansion joint comprises two radially bellowss of being tightly connected of ring flat-plate.Its improvements are: be positioned at uniform 4～8 axial holes on the same circumference of radially ring flat-plate at bellows two ends, in every axial hole ball seat be installed, the double threaded screw serial connection is also axially pieced together tight two ends ball seat and is consisted of and be hinged structure.The coaxial connection ring stand of outer tube right-hand member in the described sleeve expansion joint, the filler that outer tube and inner tube superposition section are settled forms the axial adjustable sealing pair by the ring stand block, be fixedly connected with 4～16 adjustable rollers of radial position at the same circumference in ring stand right side, roller consists of external guide structure along the outer wall of inner tube axial rolling.Uniform 4～16 bolt assemblies that radially connect of described inner tube left end endless tube wall are as built-in guide structure.
The present invention compared with prior art has following good effect:
1, the inner tube of sleeve expansion joint significantly improves the inner tube positional accuracy under inside and outside axially directed structure acting in conjunction, improves inner tube and outer coaxial tube quality of fit, greatly improves the nose balance amount, and the inner tube nose balance more balance, more flexible of moving;
2, the inner tube of sleeve expansion joint is under inside and outside axially directed structure acting in conjunction, and the sealing pair motion matter attitude between inner tube and the outer tube is good, and abrasion evenly significantly improve sealability;
3, structural limitations corrugated expansion joint nose balance, the flexibility that takes full advantage of bellows is made lateral displacement, directly improves the working environment of sleeve expansion joint, guarantees supporting pulverized coal channel safety.
Description of drawings
Fig. 1 is that structure of the present invention is partly cutd open schematic diagram.
Fig. 2 is that double threaded screw and ball seat are hinged structural representation relative to what ring flat-plate radially rotated among Fig. 1.
Fig. 3 is that roller among Fig. 1 is along the schematic diagram of outer wall of inner tube axial rolling.
Embodiment
The invention will be further described with reference to the accompanying drawings for the below.
Bore shown in Figure 1 is the combined coal powder pipe line compensating device embodiment of DN500mm, and it is connected the corrugated expansion joint of the identical bore of connection by sleeve expansion joint placed in the middle and jointly forms with two ends.Described corrugated expansion joint comprises two radially bellowss 3 of being tightly connected of ring flat-plate 1.Be positioned at uniform 6 axial holes on the radially ring flat-plate 1 same circumference at bellows 3 two ends, ball seat 2 is installed in every axial hole, double threaded screw 4 serial connections are also axially pieced together tight two ends ball seat 2 and are consisted of and be hinged.This structure directly limits the corrugated expansion joint nose balance; protection bellows 3 is excessive deformation not; only utilize the lateral displacement of the supporting pulverized coal channel of flexible absorbent of bellows 3, eliminate radial force to the impact of sleeve expansion joint with this, guarantee supporting pulverized coal channel safety.Directly bear axial force in the supporting pulverized coal channel in order to take full advantage of the sleeve expansion joint structural advantage, the outer tube 5 right-hand members coaxial connection ring stand 8 of the present invention in sleeve expansion joint, be fixedly connected with 8 adjustable rollers 9 of radial position at the same circumference in ring stand 8 right sides, roller 9 consists of external guide structure along inner tube 10 outer wall axial rollings.In order further to improve inner tube 10 axial displacement quality, at uniform 8 bolt assemblies 6 that radially connect of inner tube 10 left end endless tube walls as built-in guide structure.Because inner tube 10 is subjected to roller 9 and bolt assembly 6 jointly radially spacing, axial motion is stable, compensation is flexible, the nose balance amount is large.In addition, the filler 7 of settling in inner tube 10 and outer tube 5 superposition section of sleeve expansion joint forms the axial adjustable sealing pair by ring stand 8 block, and axially operation matter attitude is good because of inner tube 10, and the sealing abrasion evenly significantly improve sealability.
The present invention is not limited to above-described embodiment, can select to arrange according to supporting pulverized coal channel bore roller 9 and the bolt assembly 6 of varying number, and the large value of bore is large, otherwise value is little, can both obtain satisfied effect under this principle condition.
Claims (1)
1. combined coal powder pipe line compensating device, it is connected the corrugated expansion joint of the identical bore of connection by sleeve expansion joint placed in the middle and jointly forms with two ends; Described corrugated expansion joint comprises two radially bellowss (3) of being tightly connected of ring flat-plate (1); It is characterized in that: be positioned at uniform 4～8 axial holes on the same circumference of radially ring flat-plate (1) at bellows (3) two ends, ball seat (2) is installed in every axial hole, and double threaded screw (4) serial connection and axial tight two ends ball seats (2) formation of piecing together are hinged structure; The coaxial connection ring stand of outer tube in the described sleeve expansion joint (5) right-hand member (8), outer tube (5) forms the axial adjustable sealing pair with the filler (7) that inner tube (10) superposition section is settled by ring stand (8) block, same circumference is fixedly connected with 4～16 adjustable rollers of radial position (9) in ring stand (8) right side, and roller (9) consists of external guide structure along inner tube (10) outer wall axial rolling; Uniform 4～16 bolt assemblies (6) that radially connect of described inner tube (10) left end endless tube wall are as built-in guide structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103369466A CN103016891A (en) | 2012-09-13 | 2012-09-13 | Combined-type powdered coal pipeline compensation device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103369466A CN103016891A (en) | 2012-09-13 | 2012-09-13 | Combined-type powdered coal pipeline compensation device |
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| CN103016891A true CN103016891A (en) | 2013-04-03 |
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| CN2012103369466A Pending CN103016891A (en) | 2012-09-13 | 2012-09-13 | Combined-type powdered coal pipeline compensation device |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103453271A (en) * | 2013-09-11 | 2013-12-18 | 南京晨光东螺波纹管有限公司 | Low-pressure water-feeding expansion joint for nuclear station |
| CN103925449A (en) * | 2014-05-07 | 2014-07-16 | 洛阳双瑞特种装备有限公司 | Restricted-type expansion joint for flue gas turbine inlet high-temperature flue |
| CN108119722A (en) * | 2017-12-30 | 2018-06-05 | 江苏恒丰波纹管有限公司 | Three-dimensional coal dust FlexbleJoint with guide ring and sealing device |
| CN108278431A (en) * | 2018-03-13 | 2018-07-13 | 江苏五星波纹管有限公司 | A kind of spherical shape corrugated expansion joint and its production method |
| CN109681711A (en) * | 2019-01-28 | 2019-04-26 | 秦皇岛市泰德管业科技有限公司 | A kind of novel clamp pellet formula expansion joint |
| CN112648458A (en) * | 2020-12-22 | 2021-04-13 | 哈尔滨锅炉厂有限责任公司 | Low-friction high-reliability expansion joint for pulverized coal pipeline |
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| CN201190864Y (en) * | 2008-05-22 | 2009-02-04 | 上海尚甸电站设备有限公司 | Three-way combined coal fine duct compensator |
| CN101589204A (en) * | 2006-12-04 | 2009-11-25 | 贝克休斯公司 | The expansible reamer and the using method thereof that are used to application with boring |
| CN201561232U (en) * | 2009-07-10 | 2010-08-25 | 西安天达能源设备技术有限责任公司 | Residual powder-free wearproof three-dimensional compensator dedicated for powder feeding pipeline |
| CN102661463A (en) * | 2012-05-11 | 2012-09-12 | 江苏亿丰机械制造有限公司 | Guide-type maintenance-free sleeve compensator |
| CN202834552U (en) * | 2012-09-13 | 2013-03-27 | 江苏亿丰机械制造有限公司 | Combined type pulverized coal piping compensation device |
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Patent Citations (6)
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| CN2832793Y (en) * | 2004-12-14 | 2006-11-01 | 高飞 | Lower fulcrum linking device for air floating machine |
| CN101589204A (en) * | 2006-12-04 | 2009-11-25 | 贝克休斯公司 | The expansible reamer and the using method thereof that are used to application with boring |
| CN201190864Y (en) * | 2008-05-22 | 2009-02-04 | 上海尚甸电站设备有限公司 | Three-way combined coal fine duct compensator |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103453271A (en) * | 2013-09-11 | 2013-12-18 | 南京晨光东螺波纹管有限公司 | Low-pressure water-feeding expansion joint for nuclear station |
| CN103453271B (en) * | 2013-09-11 | 2016-10-05 | 南京晨光东螺波纹管有限公司 | Nuclear power station low pressure feed water expansion joint |
| CN103925449A (en) * | 2014-05-07 | 2014-07-16 | 洛阳双瑞特种装备有限公司 | Restricted-type expansion joint for flue gas turbine inlet high-temperature flue |
| CN108119722A (en) * | 2017-12-30 | 2018-06-05 | 江苏恒丰波纹管有限公司 | Three-dimensional coal dust FlexbleJoint with guide ring and sealing device |
| CN108278431A (en) * | 2018-03-13 | 2018-07-13 | 江苏五星波纹管有限公司 | A kind of spherical shape corrugated expansion joint and its production method |
| CN108278431B (en) * | 2018-03-13 | 2024-02-20 | 江苏五星波纹管有限公司 | Spherical corrugated pipe compensator and production method thereof |
| CN109681711A (en) * | 2019-01-28 | 2019-04-26 | 秦皇岛市泰德管业科技有限公司 | A kind of novel clamp pellet formula expansion joint |
| CN112648458A (en) * | 2020-12-22 | 2021-04-13 | 哈尔滨锅炉厂有限责任公司 | Low-friction high-reliability expansion joint for pulverized coal pipeline |
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Application publication date: 20130403 |