CN203628090U - Novel maintenance-free rotation compensation joint for pipeline - Google Patents
Novel maintenance-free rotation compensation joint for pipeline Download PDFInfo
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- CN203628090U CN203628090U CN201320707778.7U CN201320707778U CN203628090U CN 203628090 U CN203628090 U CN 203628090U CN 201320707778 U CN201320707778 U CN 201320707778U CN 203628090 U CN203628090 U CN 203628090U
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Abstract
The utility model discloses a novel maintenance-free rotation compensation joint for a pipeline. One end of an inner pipe and one end of a shoulder connecting pipe are connected through a labyrinth seal structure, a packing gland adopts an annular stepped structure, and a righting device is arranged between a righting flange and the packing gland; and an outer pipe inner convex ring and an inner pipe outer convex ring are arranged on the inner wall of an outer pipe and the outer wall of the inner pipe respectively, a first sealed cavity is formed between the outer pipe inner convex ring and the packing gland, two end surfaces of the first sealed cavity are conical surfaces, a first sealing filler is mounted in the first sealed cavity, the outer pipe inner convex ring and the inner pipe outer convex ring are rotationally connected, a second sealed cavity is formed between the inner pipe outer convex ring and the shoulder connecting pipe, a spacing ring, a second sealing filler and a clamp ring are mounted sequentially in the second sealed cavity, and end surfaces, contacted with the second sealing filler, of the spacing ring and the clamp ring are conical surfaces. The novel maintenance-free rotation compensation joint for the pipeline has the advantages that air tightness and rotation flexibility are not influenced mutually, the bearing capacity is large, the pressure loss is little, the flow direction is not limited, and long-term efficient sealing can be maintained without maintenance.
Description
Technical field
The utility model relates to long apart from heat distribution pipeline automatic compensatory technique field, in particular, and particularly a kind of non-maintaining rotation compensation joint of novel pipeline of the ducted innovation structure that is applicable to the industries such as oil, chemical industry, metallurgy, light industry, heating power.
Background technique
In order to ensure the safe operation of industrial pipe network, urban heating network, when engineering design, must be at pipe network appropriate position configuring pipes compensation device, absorb or compensate displacement and the thrust that pipe network internal cause medium temperature, pressure or environmental change cause with this.Current, the pipeline compensator of applying in engineering has various structures form, can play compensating action, but practical application proof has, the compensator synthesis compensation performance of rotational structure is better, compensation rate is large, at present by the extensive use of heat distribution pipe network construction project.It is comparatively ripe that existing Chinese patent discloses the disclosed technological scheme of disclosed various whirl compensator, all to rotate to realize compensation with inner tube relative to outer tube, and all there is certain compensation ability, there is good bearing capacity, all to utilize a side pipe road to rotate to absorb the feature such as end thrust or compensating axial displacement relative to opposite side pipeline, but the whirl compensator of prior art still comes with some shortcomings in actual applications, its not foot point have following several:
One, retrieval is found, in existing pipeline, having many whirl compensators is all to adopt reducer pipe technology, has the space of fluid retention between rotation inner tube and reducer pipe, and medium motion easily produces eddy current, increases flow resistance, produces pressure loss phenomenon; In addition owing to retrained by reducer pipe, when installation, must specify MEDIA FLOW to.It represents that patent has: the patent No. is that the disclosed rotary filling compensator of ZL200420054490.5, the patent No. are that the disclosed improved whirl compensator of ZL02258709.8, the patent No. are that the disclosed rotary compensator of ZL200720039235.7, the patent No. are the disclosed pipe used high pressure resistant rotary compensator of ZL200610041301.4, the number of applying for a patent 201010152041.4 disclosed pressure-compensated rotary joints etc.
Two, retrieval find, in existing pipeline, most of whirl compensator rotational structures are exposed among the medium of pipeline completely, are subject to for a long time washing away and corrode of medium, very easily cause the damage of rolling element, make to rotate malfunctioning, reduction compensator working life.It represents that it is that the disclosed precision rotary compensator of ZL200720128801.1, the patent No. are that the disclosed rotary filling compensator of ZL200420054490.5, the patent No. are the disclosed improved whirl compensator of ZL02258709.8 that patent has the disclosed self-sealing rotary compensator of patent No. ZL200720041912.9, the patent No..Although some has increased protective measures, but its unreasonable structure, such as the patent No. is the disclosed pipe used high pressure resistant rotary compensator of ZL200610041301.4, although increased by a Sealing in Seal cage, this Sealing is because the axial float of inner tube and outer tube does not have the effect of sealing.Although patent No. ZL200920007066.8, China Patent No. are ZL200920007065.3 etc. sealing is irrelevant with axial float in addition, but when this sealing structure rolling element, be easy to rolling element to kill and lose function, moreover welding heat easily burns out Sealing both to lose sealing effect in the time that welding is taken over, the Sealing residue burning out likely causes again rotation to be stuck.It is very little that the number of applying for a patent is that 201010152041.4 disclosed pressure-compensated rotary joints utilize the pressure compensation of pipeline to reach the effect of sealed rolling body, when ducted pressure enters seal ring inner chamber, also enter the end face of exocoel and seal ring from baffle ring, according to the relevant principle of pressure in physics, this sealing does not become mazy type, sealing does not become direct ratio with pressure, therefore do not have compensating action, this seal form can only be used for the mechanical seal occasion that part accuracy of manufacturing is higher, quality of fit is less, very unreasonable in compensator industry.Although patent No. ZL200910031463.3 has carried out structure innovation, the rigid sealing ring arranging in bulge loop is outside very inapplicable in compensator manufacturing industry, does not only have seal action, and welding heat in easy soldered process distortion and killing causes the accident.
Three, retrieval is found, needs to shut down after having a lot of whirl compensators to use and safeguard in existing pipeline, and these compensators, when after the wearing and tearing of stuffing box packing trace, cannot carry out auto-compensation, need manually tighten gland bolt after shutdown.It represents that patent has: the number of applying for a patent is that 201010152041.4 disclosed pressure-compensated rotary joints, China Patent No. are that the disclosed precision rotary compensator of ZL200720128801.1, China Patent No. are disclosed pipe used high pressure resistant rotary compensator of ZL200610041301.4 etc.
Four, retrieval is found, in existing pipeline, have a lot of whirl compensators inner tube effectively not to be located, its consequence is exactly in movement process, easily to make stuffing box packing eccentric wear cause leakage.Though some sets up ball to increase the positioning precision of inner tube at Gland endoporus and on inner tube boss cylindrical, this method surface has seemed to play location and has increased the guiding length effect of inner tube, and the larger drawback of physical presence, steel ball will first pack into and in groove, then assembles inner and outer pipes, owing to itself just having very large gap between inner and outer pipes, steel ball and inner tube close contact are impossible, moreover are also difficult to assembling.Therefore when the arm of couple rotates to 1/2 θ angle, when maximum swing y value occurs hot channel, all acting on whirl compensator compared with high pulling torque and blind plate thrust of generation, causes the eccentric wear of stuffing box packing, produces and leaks.It represents that patent has: the patent No. is the disclosed self-sealing rotary compensator of ZL200720041912.9, the patent No. is the disclosed rotary compensator for heat supply network pipeline of ZL200920040525.2, the patent No. is the disclosed precision rotary compensator of ZL200720128801.1, the disclosed pipe used high pressure resistant rotary compensator of patent No. ZL200610041301.4, the number of applying for a patent is the disclosed novel maintenance-free rotary compensator of 201020211054.X, the number of applying for a patent is 200910131710.7 disclosed novel high pressure-resistant maintenance-free rotary compensators etc.Wherein China Patent No. is that ZL200920007066.8 and China Patent No. are that ZL200920007065.3 and the number of applying for a patent are 201020211054.X etc. to improving inner tube location, but goes back Shortcomings, and in practical operation, is difficult to realize.
Therefore, be necessary to design a kind of novel rotation compensation joint and overcome the problems of the prior art.
Model utility content
The purpose of this utility model is to provide a kind of novel pipeline non-maintaining rotation compensation joint, it has advantages of, and sealability and flexibility of revolution are independent of each other, bearing capacity is strong, crushing is less, it is unrestricted to flow to and Maintenance free can to realize long-term maintenance efficient sealed.
In order to solve problem set forth above, the technical solution adopted in the utility model is: the non-maintaining rotation compensation joint of novel pipeline, comprises inner tube, correcting flange, Gland, outer pipe flange, outer tube, supported flange and shoulder adapter;
Described correcting flange, Gland and outer tube are sheathed in inner tube successively, one end of described outer tube is also sheathed on shoulder and takes over, described outer pipe flange connects with the other end of outer tube and is corresponding with the outer ring surface of Gland, described supported flange is sheathed on outer tube and is corresponding with outer pipe flange, described correcting flange is fixedly connected with Gland, between described Gland, outer pipe flange and supported flange, be fastenedly connected by a fixing device, and be also provided with an elastic device between described outer pipe flange and supported flange;
One end face of described inner tube is connected by a labyrinth seal structure with the end face that shoulder is taken over, and described Gland is annular stepped shape structure, between described correcting flange and Gland, is provided with guiding device;
The inwall of described outer tube and outer wall of inner tube are respectively equipped with outer tube internal projecting ring and the outer bulge loop of inner tube, between described outer tube internal projecting ring and Gland, be provided with the first Seal cage that both ends of the surface are the conical surface, in described the first Seal cage, the first stuffing box packing is installed, between the outer bulge loop of described outer tube internal projecting ring and inner tube, be rotatably connected, between the end face that the outer bulge loop of described inner tube and shoulder are taken over, be provided with the second Seal cage, in described the second Seal cage, limited ring is installed successively, the second stuffing box packing and hold-down ring, described limited ring is positioned at the outer bulge loop of inner tube one end, described hold-down ring is positioned at shoulder and takes over one end, and the end face that described limited ring and hold-down ring contact with the second stuffing box packing is the conical surface.
According to a preferred embodiment of the present utility model: described guiding device is the correcting steel ball annular groove of being located between correcting flange and Gland, and is installed on the correcting steel ball in described correcting steel ball annular groove.
According to a preferred embodiment of the present utility model: the arc surface composition that is shaped as the radius such as conical surface and correcting steel ball of described correcting steel ball annular groove.
According to a preferred embodiment of the present utility model: described labyrinth seal structure comprises the annular protrusion of being located at inner tube one end face, and is located at the annular groove that shoulder is taken over an end face and matched with annular protrusion.
According to a preferred embodiment of the present utility model: be provided with rolling groove between the outer bulge loop of described outer tube internal projecting ring and inner tube, in described rolling groove, rolling steel balls be installed.
According to a preferred embodiment of the present utility model: the outer bulge loop end face of inner tube and the outer tube internal projecting ring end face of described rolling groove one side are equipped with the arc surface equating with rolling steel balls radius.
According to a preferred embodiment of the present utility model: the material of described the first stuffing box packing and the second stuffing box packing is the Expanded graphite that has soaked into the reinforced Expanded graphite of solid high-purity of elevated-temperature seal lubricant grease or added antioxidant.
According to a preferred embodiment of the present utility model: an end of described outer tube is provided with the first bevel for welding, described shoulder is taken over and is provided with second bevel for welding corresponding with the first bevel for welding, overall by being welded to connect between described the first bevel for welding and the second bevel for welding; And described outer tube internal projecting ring is less than its distance from outer pipe flange from the distance of described the first bevel for welding.
According to a preferred embodiment of the present utility model: described fixing device is the screw rod that connects described Gland, outer pipe flange and supported flange, and is installed on the nut on screw rod.
According to a preferred embodiment of the present utility model: described elastic device is the spring on the screw rod being installed between outer pipe flange and supported flange.
Compared with prior art, the beneficial effects of the utility model are:
1, the utility model carries out twice sealing to rolling structure, and rotational structure is complete and flowing medium separates, and is difficult for being corroded and corrosion, keeps for a long time flexibility of revolution.
2, sealing configuration of the present utility model and rotational structure are separate, mutual noninterference, and surface friction drag is minimum.
3, the utility model not only makes the stuffing box packing between outer tube and inner tube form dual sealing, and utilize member itself to carry out triple seal, in running, the wearing and tearing of stuffing box packing are compensated by the effect promotion Gland of elastic device, the long-term sealing configuration that keeps is worked under the best outfit state, realizes non-maintaining object.
4, the utility model bearing capacity is strong, crushing is little, MEDIA FLOW is to unrestricted, does not produce the condition of fluid vortex, and media flow is unimpeded, and flow resistance is minimum.
5, the utility model adopts the conical surface to carry out self-alignment principle, makes inner tube accurate positioning, and correcting precision is high, and stuffing box packing is wear trend without acceptance of persons, guarantees good sealability.
6, two Seal cages of the present utility model all adopt conical ring groove shape, and according to mechanics principle, stuffing box packing is under external force subject to axially and the radially effect of two component simultaneously, and filler presses to outer wall of inner tube tightly, greatly improves the reliability of sealing.
Accompanying drawing explanation
Fig. 1 is the structural representation of the non-maintaining rotation compensation joint of novel pipeline of the present utility model.
Fig. 2 is the enlarged view at A place in the utility model Fig. 1.
Description of reference numerals: 1. inner tube, 2. correcting flange, 3. socket head screw, 4. correcting steel ball, 5. Gland, 6. outer pipe flange, 7. outer tube, 8. the first stuffing box packing, 9. spring, 10. outer tube internal projecting ring, 11. rolling steel balls, 12. supported flanges, the outer bulge loop of 13. inner tubes, 14. screw rods, 15. nuts, 16. limited rings, 17. second stuffing box packing, 18. hold-down rings, 19. shoulders adapters.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the utility model is described in further detail, but mode of execution of the present utility model is not limited to this.
Consult shown in Fig. 1, Fig. 2, the utility model provides a kind of novel pipeline non-maintaining rotation compensation joint, comprises inner tube 1, correcting flange 2, Gland 5, outer pipe flange 6, outer tube 7, supported flange 12 and shoulder adapter 19; Wherein, correcting flange 2, Gland 5 and outer tube 7 are sheathed in inner tube 1 successively, one end of outer tube 7 is also sheathed on shoulder and takes on 19, outer pipe flange 6 connects with the other end of outer tube 7 and is corresponding with the outer ring surface of Gland 5, supported flange 12 is sheathed on outer tube 7 and is corresponding with outer pipe flange 6, correcting flange 2 is fixedly connected with (can be connected by socket head screw 3) with Gland 5, between Gland 5, outer pipe flange 6 and supported flange 12, be fastenedly connected by a fixing device, and be also provided with an elastic device between outer pipe flange 6 and supported flange 12.
The inwall of above-mentioned outer tube 7 and inner tube 1 outer wall are respectively equipped with outer tube internal projecting ring 10 and the outer bulge loop 13 of inner tube, between outer tube internal projecting ring 10 and Gland 5, be provided with the first Seal cage that both ends of the surface are the conical surface, the first stuffing box packing 8 is installed in the first Seal cage, between the outer bulge loop 13 of outer tube internal projecting ring 10 and inner tube, be rotatably connected, between the outer bulge loop 13 of inner tube and the end face of shoulder adapter 19, be provided with the second Seal cage, limited ring 16 is installed in the second Seal cage successively, the second stuffing box packing 17 and hold-down ring 18, limited ring 16 is positioned at the outer bulge loop of inner tube 13 one end, hold-down ring 18 is positioned at shoulder and takes over 19 one end, and limited ring 16 and hold-down ring 18 are the conical surface with the end face that the second stuffing box packing 17 contacts.Wherein, the cone angle of two conical surfaces of the first Seal cage, and the cone angle of two conical surfaces of limited ring 16 and hold-down ring 18 can be set as required; And leave clearance space between the outer bulge loop 13 of limited ring 16 and inner tube, to guarantee the flexibility of rotary connection structure; And hold-down ring 18 can protect the second stuffing box packing 17 not to be subject to the damage of shoulder adapter 19 and outer tube 7 welding heats.
The concrete scheme being rotatably connected between the outer bulge loop 13 of above-mentioned outer tube internal projecting ring 10 and inner tube is: between the outer bulge loop 13 of bulge loop 10 and inner tube, be provided with rolling groove within the outer tube, rolling steel balls 11 is installed in rolling groove; And outer bulge loop 13 end faces of the inner tube that rolling groove one side is set and outer tube internal projecting ring 10 end faces are equipped with the arc surface equating with rolling steel balls 11 radiuses.Like this, the rolling groove that rolling steel balls 11 is placed between outer tube internal projecting ring 10 and the outer bulge loop 13 of inner tube forms rolling structure, the surface friction drag when bearing larger end thrust and reducing rotation.
One end face of above-mentioned inner tube 1 is provided with the chamfering of joining with Outer Tube, the other end of inner tube 1 is connected by a labyrinth seal structure with an end face of shoulder adapter 19, this labyrinth seal structure comprises the annular protrusion of being located at inner tube 1 one end faces, and is located at the annular groove that shoulder is taken over 19 1 end faces and matched with annular protrusion.Like this can be to rolling steel balls 11 " once sealing ".And the second stuffing box packing 17 is placed in the second Seal cage that inner tube 1 outer ring surface and outer tube 7 inner ring surfaces and limited ring 16, hold-down ring 18 conical surfaces form, rolling element 11 is carried out to " secondary seal ", when pipeline pressure enters after the end face of hold-down ring 18, hold-down ring 18 promotes the second stuffing box packing 17 and more presses tighter under pressure, pressure is larger, the second stuffing box packing 17 is tighter, and sealability is better.And the first stuffing box packing 8 is placed in the Seal cage that inner tube 1 outer ring surface and outer tube 7 inner ring surfaces and outer tube internal projecting ring 10 conical surfaces, Gland 5 conical surfaces form, realize the sealing completely of whole compensating joint.
Above-mentioned Gland 5 is annular stepped shape structure, between correcting flange 2 and Gland 5, is provided with guiding device; And guiding device is the correcting steel ball annular groove of being located between correcting flange 2 and Gland 5, and be installed on the correcting steel ball 4 in described correcting steel ball annular groove.And the arc surface composition that is shaped as the radius such as conical surface and correcting steel ball 4 of correcting steel ball annular groove.Like this, correcting steel ball 4 is automatically realized inner tube 1 is carried out to centering correcting under the effect of two conical surfaces.
The first above-mentioned stuffing box packing 8 and the material of the second stuffing box packing 17 are the Expanded graphite that has soaked into the reinforced Expanded graphite of solid high-purity of elevated-temperature seal lubricant grease or added antioxidant.
One end of above-mentioned outer tube 7 is provided with the first bevel for welding, and shoulder is taken over 19 and is provided with second bevel for welding corresponding with the first bevel for welding, overall by being welded to connect between the first bevel for welding and the second bevel for welding; And outer tube internal projecting ring 10 is less than its distance from outer pipe flange 6 from the distance of described the first bevel for welding.And the internal diameter of shoulder adapter 19 equals the internal diameter of inner tube 1, to guarantee the unimpeded of medium, without being detained, reduce flow resistance.Shoulder is taken over 19 shoulder end socket joint in the first bevel for welding end contact hold-down ring 18 of outer tube, compresses the second stuffing box packing 17.
As preferably, above-mentioned fixing device is the screw rod 14 of bonding pad gland 5, outer pipe flange 6 and supported flange 12, and is installed on the nut 15 on screw rod 14, and.
As preferably, above-mentioned elastic device is the spring 9 on the screw rod 14 being installed between outer pipe flange 6 and supported flange 12, and the quantity of spring 9 is consistent with the quantity of screw rod 14, and spring 9 is standard or nonstandard flush end Compress Spring, the first and second stuffing box packing (8 in movement process, 17) wearing and tearing promote Gland 5 by the spring-force driven dual of spring 9 and compensate, and realize non-maintaining function.
The non-maintaining rotation compensation joint structure of pipeline of the present utility model novelty, sealing configuration and rotational structure are separate, mutual noninterference.Conical ring groove shape packing cavity, makes filler press to tightly outer wall of inner tube under external force, seals more reliably, and sealing effect is better.And have that positioning precision is high, surface friction drag is little, bending resistance anti-twisting property is strong, crushing is little, MEDIA FLOW is to unrestricted, the feature such as pipeline long-time running is non-maintaining.
Above-described embodiment is preferably mode of execution of the utility model; but mode of execution of the present utility model is not restricted to the described embodiments; other any do not deviate from change, the modification done under Spirit Essence of the present utility model and principle, substitutes, combination, simplify; all should be equivalent substitute mode, within being included in protection domain of the present utility model.
Claims (10)
1. the non-maintaining rotation compensation joint of novel pipeline, comprises inner tube (1), correcting flange (2), Gland (5), outer pipe flange (6), outer tube (7), supported flange (12) and shoulder adapter (19), it is characterized in that:
Described correcting flange (2), Gland (5) and outer tube (7) are sheathed in inner tube (1) successively, one end of described outer tube (7) is also sheathed on shoulder and takes on (19), described outer pipe flange (6) connects with the other end of outer tube (7) and is corresponding with the outer ring surface of Gland (5), it is upper and corresponding with outer pipe flange (6) that described supported flange (12) is sheathed on outer tube (7), described correcting flange (2) is fixedly connected with Gland (5), described Gland (5), between outer pipe flange (6) and supported flange (12), be fastenedly connected by a fixing device, and be also provided with an elastic device between described outer pipe flange (6) and supported flange (12),
One end face of described inner tube (1) is connected by a labyrinth seal structure with the end face that shoulder is taken over (19), and described Gland (5) is annular stepped shape structure, between described correcting flange (2) and Gland (5), is provided with guiding device;
The inwall of described outer tube (7) and inner tube (1) outer wall are respectively equipped with outer tube internal projecting ring (10) and the outer bulge loop (13) of inner tube, between described outer tube internal projecting ring (10) and Gland (5), be provided with both ends of the surface and be the first Seal cage of the conical surface, the first stuffing box packing (8) is installed in described the first Seal cage, between the outer bulge loop (13) of described outer tube internal projecting ring (10) and inner tube, be rotatably connected, between the outer bulge loop (13) of described inner tube and the end face of shoulder adapter (19), be provided with the second Seal cage, limited ring (16) is installed in described the second Seal cage successively, the second stuffing box packing (17) and hold-down ring (18), described limited ring (16) is positioned at the outer bulge loop (13) of inner tube one end, described hold-down ring (18) is positioned at shoulder and takes over (19) one end, and described limited ring (16) and hold-down ring (18) are the conical surface with the end face that the second stuffing box packing (17) contacts.
2. the non-maintaining rotation compensation joint of novel pipeline according to claim 1, it is characterized in that: described guiding device is the correcting steel ball annular groove of being located between correcting flange (2) and Gland (5), and is installed on the correcting steel ball (4) in described correcting steel ball annular groove.
3. the non-maintaining rotation compensation joint of novel pipeline according to claim 2, is characterized in that: the arc surface composition that is shaped as the radius such as conical surface and correcting steel ball (4) of described correcting steel ball annular groove.
4. the non-maintaining rotation compensation joint of novel pipeline according to claim 2, it is characterized in that: described labyrinth seal structure comprises the annular protrusion of being located at inner tube (1) one end face, and be located at the annular groove that shoulder is taken over (19) one end faces and matched with annular protrusion.
5. the non-maintaining rotation compensation joint of novel pipeline according to claim 2, is characterized in that: between the outer bulge loop (13) of described outer tube internal projecting ring (10) and inner tube, be provided with rolling groove, rolling steel balls (11) is installed in described rolling groove.
6. the non-maintaining rotation compensation joint of novel pipeline according to claim 5, is characterized in that: outer bulge loop (13) end face of inner tube and outer tube internal projecting ring (10) end face of described rolling groove one side are equipped with the arc surface equating with rolling steel balls (11) radius.
7. the non-maintaining rotation compensation joint of novel pipeline according to claim 2, is characterized in that: the material of described the first stuffing box packing (8) and the second stuffing box packing (17) is the Expanded graphite that has soaked into the reinforced Expanded graphite of solid high-purity of elevated-temperature seal lubricant grease or added antioxidant.
8. the non-maintaining rotation compensation joint of novel pipeline according to claim 2, it is characterized in that: an end of described outer tube (7) is provided with the first bevel for welding, described shoulder is taken over (19) and is provided with second bevel for welding corresponding with the first bevel for welding, overall by being welded to connect between described the first bevel for welding and the second bevel for welding; And described outer tube internal projecting ring (10) is less than its distance from outer pipe flange (6) from the distance of described the first bevel for welding.
9. according to the non-maintaining rotation compensation joint of novel pipeline described in claim 1-8 any one, it is characterized in that: described fixing device is the screw rod (14) of the described Gland of connection (5), outer pipe flange (6) and supported flange (12), and is installed on the nut (15) on screw rod (14).
10. the non-maintaining rotation compensation joint of novel pipeline according to claim 9, is characterized in that: described elastic device is for being installed on the spring (9) on the screw rod (14) between outer pipe flange (6) and supported flange (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320707778.7U CN203628090U (en) | 2013-11-09 | 2013-11-09 | Novel maintenance-free rotation compensation joint for pipeline |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320707778.7U CN203628090U (en) | 2013-11-09 | 2013-11-09 | Novel maintenance-free rotation compensation joint for pipeline |
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| CN203628090U true CN203628090U (en) | 2014-06-04 |
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| CN201320707778.7U Expired - Fee Related CN203628090U (en) | 2013-11-09 | 2013-11-09 | Novel maintenance-free rotation compensation joint for pipeline |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109595454A (en) * | 2019-01-25 | 2019-04-09 | 新泰市佳兴液压机械有限公司 | A kind of grease gun rotary connecting device |
| CN113669531A (en) * | 2021-08-26 | 2021-11-19 | 江苏亚星波纹管有限公司 | Maintenance-free omnibearing rotary compensator |
-
2013
- 2013-11-09 CN CN201320707778.7U patent/CN203628090U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109595454A (en) * | 2019-01-25 | 2019-04-09 | 新泰市佳兴液压机械有限公司 | A kind of grease gun rotary connecting device |
| CN113669531A (en) * | 2021-08-26 | 2021-11-19 | 江苏亚星波纹管有限公司 | Maintenance-free omnibearing rotary compensator |
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| 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: 20140604 Termination date: 20141109 |
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| EXPY | Termination of patent right or utility model |