CN202834552U - Combined type pulverized coal piping compensation device - Google Patents
Combined type pulverized coal piping compensation device Download PDFInfo
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- CN202834552U CN202834552U CN 201220464065 CN201220464065U CN202834552U CN 202834552 U CN202834552 U CN 202834552U CN 201220464065 CN201220464065 CN 201220464065 CN 201220464065 U CN201220464065 U CN 201220464065U CN 202834552 U CN202834552 U CN 202834552U
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- axial
- inner tube
- expansion joint
- bellows
- pulverized coal
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Abstract
The utility model discloses a combined type pulverized coal piping compensation device which is formed by a centered sleeve compensator and two bellows compensators which are connected with the sleeve compensator in a coaxial mode and have the same aperture. Axial through holes are uniformly distributed in axial annular plates located at two ends of a bellows, a spherical seat is installed in each axial through hole, double-thread screws are in serial connection with the two spherical seats and axially piece the two spherical seats together to form a hinged connection structure, the structure limits axial motion of the bellows, and lateral displacement of a matched pulverized coal piping is absorbed just by means of flexibility of the bellows. The right end of an outer tube of the sleeve compensator is coaxially connected with an annular frame, rollers with adjustable axial positions are uniformly distributed on the right end face of the annular frame, and the rollers roll along the axial direction of the outer wall of an inner tube to form an externally installed guiding structure. Aiming at further improvement of inner tube axial displacement quality, bolt assemblies in radial connection are uniformly distributed on a left end annular tube wall of the inner tube to serve as an internally installed guiding structure. According to the combined type pulverized coal piping compensation device, axial compensation and transverse compensation are definite, compensation is flexible, compensation quantity is large, and sealing effects are good.
Description
Technical field
The utility model relates to a kind of pipe line compensating device, and specifically, the utility model relates to a kind of combined coal powder pipe line compensating device, and 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.
The model utility content
The utility model 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 utility model 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 utility model 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 the utility model structure is partly cutd open schematic representation.
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 representation of outer wall of inner tube axial rolling.
Embodiment
The utility model is described in further detail 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 utility model 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 utility model 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 |
|---|---|---|---|
| CN 201220464065 CN202834552U (en) | 2012-09-13 | 2012-09-13 | Combined type pulverized coal piping compensation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220464065 CN202834552U (en) | 2012-09-13 | 2012-09-13 | Combined type pulverized coal piping compensation device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202834552U true CN202834552U (en) | 2013-03-27 |
Family
ID=47946258
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220464065 Expired - Fee Related CN202834552U (en) | 2012-09-13 | 2012-09-13 | Combined type pulverized coal piping compensation device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202834552U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103016891A (en) * | 2012-09-13 | 2013-04-03 | 江苏亿丰机械制造有限公司 | Combined-type powdered coal pipeline compensation device |
-
2012
- 2012-09-13 CN CN 201220464065 patent/CN202834552U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103016891A (en) * | 2012-09-13 | 2013-04-03 | 江苏亿丰机械制造有限公司 | Combined-type powdered coal pipeline compensation device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130327 Termination date: 20170913 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |