CN219413767U - A pipeline stabilization mechanism - Google Patents
A pipeline stabilization mechanism Download PDFInfo
- Publication number
- CN219413767U CN219413767U CN202320643445.6U CN202320643445U CN219413767U CN 219413767 U CN219413767 U CN 219413767U CN 202320643445 U CN202320643445 U CN 202320643445U CN 219413767 U CN219413767 U CN 219413767U
- Authority
- CN
- China
- Prior art keywords
- rod
- fixedly installed
- block
- pipeline
- groove
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 230000006641 stabilisation Effects 0.000 title claims description 12
- 238000011105 stabilization Methods 0.000 title claims description 12
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 7
- 238000009434 installation Methods 0.000 claims description 24
- 239000007789 gas Substances 0.000 description 5
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000002262 irrigation Effects 0.000 description 1
- 238000003973 irrigation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Landscapes
- Supports For Pipes And Cables (AREA)
Abstract
本实用新型公开了一种管道稳定机构,涉及油气管道稳定技术领域,包括安装基座、安装块,安装基座的内部开有两个滑槽,两个滑槽的内部均滑动连接有第一滑块,两个第一滑块之间固定安装有第一连接板,安装基座的内部固定安装有两个液压杆,液压杆的输出端与第一连接板固定连接,本实用新型的有益效果为:通过利用第一电机带动双向丝杆进行旋转,可以带动第二滑块在转动槽的内部滑动,由此可以调节夹板的位置对管道进行夹持,完成对管道的限位工作,同时利用液压杆带动第一连接板进行移动可以调节放置板的高度,同时带动第一滑块在滑槽的内部滑动,由此可以根据需求调节管道与地基的高度,泛用性较强,提高了实用性。
The utility model discloses a pipeline stabilizing mechanism, which relates to the technical field of stabilizing oil and gas pipelines, and comprises a mounting base and a mounting block. There are two sliding slots inside the mounting base. A first sliding block is slidably connected to the inside of the two sliding slots. A first connecting plate is fixedly installed between the two first sliding blocks. Two hydraulic rods are fixedly installed inside the mounting base. The output end of the hydraulic rod is fixedly connected to the first connecting plate. The pipeline is clamped to complete the limit work of the pipeline. At the same time, the hydraulic rod is used to drive the first connecting plate to move to adjust the height of the placing plate. At the same time, it drives the first slider to slide inside the chute, so that the height of the pipeline and the foundation can be adjusted according to the demand. It has strong versatility and improves practicability.
Description
技术领域technical field
本实用新型涉及油气管道稳定技术领域,具体为一种管道稳定机构。The utility model relates to the technical field of oil and gas pipeline stabilization, in particular to a pipeline stabilization mechanism.
背景技术Background technique
管道是指用管子、管子连接件和阀门等连接成的用于输送气体、液体或带固体颗粒的流体的装置,主要用在给水、排水、供热、供煤气、长距离输送石油和天然气、农业灌溉、水利工程和各种工业装置中,油气管道就属于其中的一种,油气管道是长距离输送油气的中间通道,油资源通过油泵机和空压机组成的动力系统,将油资源压缩成直径较小的油滴和空气混合后,再经过油气管道运输到目的地,Pipeline refers to a device connected by pipes, pipe connectors and valves to transport gas, liquid or fluid with solid particles. It is mainly used in water supply, drainage, heat supply, gas supply, long-distance transportation of oil and natural gas, agricultural irrigation, water conservancy projects and various industrial installations. Oil and gas pipelines are one of them. Pipeline transportation to destination,
而现有技术针对管道进行施工时,进行安装铺设时,大多数使用吊车对管道吊起,同时又因为施工管道安装地基高度不一,导致油气管道安装时的稳定性较差,为此我们提出了一种管道稳定机构。In the existing technology, when the pipeline is installed and laid, most of the pipelines are lifted by cranes. At the same time, because the construction pipelines are installed at different heights, the stability of the oil and gas pipelines during installation is poor. Therefore, we propose a pipeline stabilization mechanism.
实用新型内容Utility model content
针对现有技术的不足,本实用新型提供了一种管道稳定机构,解决了上述背景技术中提出的问题。Aiming at the deficiencies of the prior art, the utility model provides a pipeline stabilization mechanism, which solves the problems raised in the background art above.
为实现以上目的,本实用新型通过以下技术方案予以实现:一种管道稳定机构,包括安装基座、安装块,所述安装基座的内部开有两个滑槽,两个所述滑槽的内部均滑动连接有第一滑块,两个所述第一滑块之间固定安装有第一连接板,所述安装基座的内部固定安装有两个液压杆,所述液压杆的输出端与第一连接板固定连接,所述第一连接板的顶部固定安装有支撑杆,所述支撑杆的顶部固定安装有放置板,所述安装基座的内部固定安装有两个转动块,所述转动块的外侧转动连接有连接杆,所述连接杆的一端固定安装有电动伸缩杆,所述电动伸缩杆的输出端固定安装有固定锥,所述转动块的一侧固定安装有第二电机,所述第二电机的输出端与连接杆固定连接。In order to achieve the above object, the utility model is achieved through the following technical solutions: a pipeline stabilization mechanism, including a mounting base and a mounting block. There are two slide slots inside the mounting base, and a first slider is slidably connected to the inside of the two slide slots. A first connecting plate is fixedly installed between the two first sliding blocks. Two hydraulic rods are fixedly installed inside the mounting base. The output end of the hydraulic rod is fixedly connected to the first connecting plate. Two rotating blocks, the outer side of the rotating block is connected with a connecting rod, one end of the connecting rod is fixedly mounted with an electric telescopic rod, the output end of the electric telescopic rod is fixedly mounted with a fixed cone, one side of the rotating block is fixedly mounted with a second motor, and the output end of the second motor is fixedly connected with the connecting rod.
优选的,所述支撑杆的顶部固定安装有放置板,所述放置板的顶部开设有转动槽,所述转动槽的内部滑动连接有两个第二滑块。Preferably, a placement plate is fixedly installed on the top of the support rod, a turning slot is opened on the top of the placement plate, and two second sliders are slidably connected inside the turning slot.
优选的,所述第二滑块的顶部固定安装有第二连接板,所述安装块的底部开设有卡槽,所述卡槽的内部卡接有卡块,所述第二连接板与卡块固定连接,所述安装块的顶部固定安装有夹板,所述夹板的内部螺纹连接有螺纹杆。Preferably, a second connecting plate is fixedly installed on the top of the second slider, and a slot is provided at the bottom of the mounting block, and a locking block is snapped inside the slot, and the second connecting plate is fixedly connected to the locking block, a splint is fixedly installed on the top of the mounting block, and a threaded rod is threaded inside the splint.
优选的,所述放置板的一侧固定安装有第一电机,所述转动槽的内部转动连接有双向丝杆,所述双向丝杆的一端与第一电机的输出端固定连接,所述双向丝杆贯穿第二滑块并与第二滑块螺纹连接。Preferably, a first motor is fixedly installed on one side of the placement plate, a two-way screw rod is rotatably connected inside the rotating groove, one end of the two-way screw rod is fixedly connected to the output end of the first motor, and the two-way screw rod passes through the second slider and is threadedly connected with the second slider.
优选的,所述安装块的内部开设有安装槽,所述安装槽的内部设置有拉杆,所述拉杆一端固定安装有限位块,所述卡块的外侧开设有限位槽,所述限位槽与限位块相适配。Preferably, an installation groove is opened inside the installation block, and a pull rod is arranged inside the installation groove, and a limit block is fixedly installed at one end of the pull rod, and a limit groove is opened on the outside of the clamp block, and the limit groove matches the limit block.
优选的,所述安装槽的内部固定安装有伸缩弹簧,所述拉杆贯穿伸缩弹簧。Preferably, a telescopic spring is fixedly installed inside the installation groove, and the pull rod passes through the telescopic spring.
本实用新型提供了一种管道稳定机构,具备以下有益效果:The utility model provides a pipeline stabilization mechanism, which has the following beneficial effects:
1、该管道稳定机构,通过利用第一电机带动双向丝杆进行旋转,可以带动第二滑块在转动槽的内部滑动,由此可以调节夹板的位置对管道进行夹持,完成对管道的限位工作,同时利用液压杆带动第一连接板进行移动可以调节放置板的高度,同时带动第一滑块在滑槽的内部滑动,由此可以根据需求调节管道与地基的高度,泛用性较强,提高了实用性。1. The pipeline stabilization mechanism, by using the first motor to drive the two-way screw to rotate, can drive the second slider to slide inside the rotation groove, thereby adjusting the position of the splint to clamp the pipeline and complete the limit work on the pipeline. At the same time, the hydraulic rod is used to drive the first connecting plate to move to adjust the height of the placement plate, and at the same time drive the first slider to slide inside the chute, so that the height of the pipeline and the foundation can be adjusted according to requirements. It has strong versatility and improves practicability.
2、该管道稳定机构,通过利用第二电机带动连接杆进行旋转,可以调节电动伸缩杆的角度,利用电动伸缩杆可以带动固定锥进行移动,使其扎入地面,完成限位工作的同时形成三角状,由此可以进一步增加装置使用时的稳定性,通过拉动拉杆可以带动限位块进行移动,限位块移动时对伸缩弹簧进行压缩,接着将卡块卡入到卡槽的内部,可以完成与夹板的连接工作,接着解除对拉杆的拉力,利用伸缩弹簧的回弹力可以将限位块复位,使其卡入到限位槽的内部,完成夹板的限位工作,由此可以根据管道型号对夹板进行更换,减小了使用的局限性。2. The pipeline stabilization mechanism can adjust the angle of the electric telescopic rod by using the second motor to drive the connecting rod to rotate. The electric telescopic rod can drive the fixed cone to move, making it penetrate into the ground and form a triangle shape while completing the limit work. This can further increase the stability of the device during use. The limit block can be driven to move by pulling the pull rod. When the limit block moves, the telescopic spring is compressed, and then the block is inserted into the slot. Force can reset the limit block so that it snaps into the inside of the limit groove to complete the limit work of the splint, so that the splint can be replaced according to the pipeline model, reducing the limitation of use.
附图说明Description of drawings
图1为本实用新型结构示意图;Fig. 1 is the structural representation of the utility model;
图2为本实用新型的正视图;Fig. 2 is the front view of the utility model;
图3为本实用新型图1中的A处放大图。Fig. 3 is an enlarged view of A in Fig. 1 of the present utility model.
图中:1、安装基座;2、固定锥;3、液压杆;4、第一连接板;5、电动伸缩杆;6、连接杆;7、转动块;8、支撑杆;9、第一滑块;10、第二滑块;11、放置板;12、第二连接板;13、转动槽;14、双向丝杆;15、第一电机;16、螺纹杆;17、夹板;18、卡槽;19、限位槽;20、限位块;21、拉杆;22、安装块;23、卡块;24、伸缩弹簧;25、安装槽;26、第二电机;27、滑槽。Among the figure: 1, installation base; 2, fixed cone; 3, hydraulic rod; 4, first connecting plate; 5, electric telescopic rod; 6, connecting rod; 7, rotating block; 8, support rod; 9, first sliding block; 10, second sliding block; 21, pull rod; 22, installation block; 23, clamping block; 24, telescopic spring; 25, installation slot; 26, second motor; 27, chute.
具体实施方式Detailed ways
下面将结合本实用新型实施例中的附图,对本实用新型实施例中的技术方案进行清楚、完整的描述,显然,所描述的实施例仅仅是本实用新型一部分实施例,而不是全部的实施例。The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them.
实施例一:Embodiment one:
请参阅图1至图3,本实用新型提供一种技术方案:一种管道稳定机构,包括安装基座1、安装块22,安装基座1的内部开有两个滑槽27,两个滑槽27的内部均滑动连接有第一滑块9,两个第一滑块9之间固定安装有第一连接板4,安装基座1的内部固定安装有两个液压杆3,液压杆3的输出端与第一连接板4固定连接,第一连接板4的顶部固定安装有支撑杆8,支撑杆8的顶部固定安装有放置板11,支撑杆8的顶部固定安装有放置板11,放置板11的顶部开设有转动槽13,转动槽13的内部滑动连接有两个第二滑块10,放置板11的一侧固定安装有第一电机15,转动槽13的内部转动连接有双向丝杆14,双向丝杆14的一端与第一电机15的输出端固定连接,双向丝杆14贯穿第二滑块10并与第二滑块10螺纹连接,通过利用第一电机15带动双向丝杆14进行旋转,可以带动第二滑块10在转动槽13的内部滑动,由此可以调节夹板17的位置对管道进行夹持,完成对管道的限位工作,同时利用液压杆3带动第一连接板4进行移动可以调节放置板11的高度,同时带动第一滑块9在滑槽27的内部滑动,由此可以根据需求调节管道与地基的高度,泛用性较强,提高了实用性。Please refer to Fig. 1 to Fig. 3, the utility model provides a kind of technical solution: a kind of pipeline stabilizing mechanism, comprises installation base 1, installation block 22, and the interior of installation base 1 is provided with two chute 27, and the inside of two chute 27 is all slidably connected with the first slider 9, and the first connecting plate 4 is fixedly installed between two first sliders 9, and the interior of installation base 1 is fixedly installed with two hydraulic rods 3, and the output end of hydraulic rod 3 is fixedly connected with first connecting plate 4, and the top of first connecting plate 4 is fixedly installed with support bar 8, and the top of support bar 8 is fixedly installed with Placing plate 11, the top of support bar 8 is fixedly equipped with placing plate 11, and the top of placing plate 11 is provided with turning groove 13, and the inside of turning groove 13 is slidably connected with two second slide blocks 10, and one side of placing plate 11 is fixedly installed with first motor 15, and the inner rotation of turning groove 13 is connected with two-way screw mandrel 14, and one end of two-way screw mandrel 14 is fixedly connected with the output end of first motor 15, and two-way screw mandrel 14 runs through second slide block 10 and is threadedly connected with second slide block 10, drives by utilizing first motor 15 The two-way screw rod 14 rotates to drive the second slider 10 to slide inside the rotating groove 13, thereby adjusting the position of the splint 17 to clamp the pipeline and complete the positioning of the pipeline. At the same time, the hydraulic rod 3 is used to drive the first connecting plate 4 to move to adjust the height of the placement plate 11. At the same time, the first slider 9 is driven to slide inside the chute 27, so that the height of the pipeline and the foundation can be adjusted according to requirements. It has strong versatility and improves practicability.
实施例二:Embodiment two:
第二滑块10的顶部固定安装有第二连接板12,安装块22的底部开设有卡槽18,卡槽18的内部卡接有卡块23,第二连接板12与卡块23固定连接,安装块22的顶部固定安装有夹板17,夹板17的内部螺纹连接有螺纹杆16,安装块22的内部开设有安装槽25,安装槽25的内部设置有拉杆21,拉杆21一端固定安装有限位块20,卡块23的外侧开设有限位槽19,限位槽19与限位块20相适配,安装槽25的内部固定安装有伸缩弹簧24,拉杆21贯穿伸缩弹簧24,安装基座1的内部固定安装有两个转动块7,转动块7的外侧转动连接有连接杆6,连接杆6的一端固定安装有电动伸缩杆5,电动伸缩杆5的输出端固定安装有固定锥2,转动块7的一侧固定安装有第二电机26,第二电机26的输出端与连接杆6固定连接,通过利用第二电机26带动连接杆6进行旋转,可以调节电动伸缩杆5的角度,利用电动伸缩杆5可以带动固定锥2进行移动,使其扎入地面,完成限位工作的同时形成三角状,由此可以进一步增加装置使用时的稳定性,通过拉动拉杆21可以带动限位块20进行移动,限位块20移动时对伸缩弹簧24进行压缩,接着将卡块23卡入到卡槽18的内部,可以完成与夹板17的连接工作,接着解除对拉杆21的拉力,利用伸缩弹簧24的回弹力可以将限位块20复位,使其卡入到限位槽19的内部,完成夹板17的限位工作,由此可以根据管道型号对夹板17进行更换,减小了使用的局限性。The top of the second slider 10 is fixedly installed with the second connecting plate 12, the bottom of the mounting block 22 is provided with a draw-in groove 18, and the inside of the draw-in groove 18 is clamped with a clamping block 23. 0, the outside of the clamping block 23 is provided with a limit groove 19, the limit groove 19 is compatible with the limit block 20, the inside of the installation groove 25 is fixedly installed with a telescopic spring 24, the pull rod 21 runs through the telescopic spring 24, and the inside of the installation base 1 is fixedly installed with two rotating blocks 7, the outside of the rotating block 7 is connected with the connecting rod 6, one end of the connecting rod 6 is fixedly installed with the electric telescopic rod 5, the output end of the electric telescopic rod 5 is fixedly installed with the fixed cone 2, one side of the rotating block 7 is fixedly installed with the second motor 26, the second motor 2 The output end of 6 is fixedly connected with the connecting rod 6. By using the second motor 26 to drive the connecting rod 6 to rotate, the angle of the electric telescopic rod 5 can be adjusted. The electric telescopic rod 5 can be used to drive the fixed cone 2 to move, so that it can be inserted into the ground and form a triangular shape while completing the position limiting work. This can further increase the stability of the device during use. By pulling the pull rod 21, the limit block 20 can be driven to move. The connection work of the plate 17 is followed by releasing the pulling force on the pull rod 21, and the limit block 20 can be reset by the rebound force of the telescopic spring 24, so that it is snapped into the inside of the limit groove 19, and the limit work of the splint 17 is completed, so that the splint 17 can be replaced according to the pipeline model, reducing the limitation of use.
综上,该管道稳定机构,使用时,通过利用第一电机15带动双向丝杆14进行旋转,可以带动第二滑块10在转动槽13的内部滑动,由此可以调节夹板17的位置对管道进行夹持,完成对管道的限位工作,同时利用液压杆3带动第一连接板4进行移动可以调节放置板11的高度,同时带动第一滑块9在滑槽27的内部滑动,由此可以根据需求调节管道与地基的高度,通过利用第二电机26带动连接杆6进行旋转,可以调节电动伸缩杆5的角度,利用电动伸缩杆5可以带动固定锥2进行移动,使其扎入地面,完成限位工作的同时形成三角状,由此可以进一步增加装置使用时的稳定性,通过拉动拉杆21可以带动限位块20进行移动,限位块20移动时对伸缩弹簧24进行压缩,接着将卡块23卡入到卡槽18的内部,可以完成与夹板17的连接工作,接着解除对拉杆21的拉力,利用伸缩弹簧24的回弹力可以将限位块20复位,使其卡入到限位槽19的内部,完成夹板17的限位工作。To sum up, when the pipeline stabilization mechanism is in use, the first motor 15 drives the two-way screw rod 14 to rotate, which can drive the second slider 10 to slide inside the rotation groove 13, thereby adjusting the position of the splint 17 to clamp the pipeline and complete the positioning of the pipeline. At the same time, the hydraulic rod 3 drives the first connecting plate 4 to move to adjust the height of the placement plate 11. At the same time, it drives the first slider 9 to slide inside the chute 27, so that the height of the pipeline and the foundation can be adjusted according to requirements. The rod 6 rotates to adjust the angle of the electric telescopic rod 5. The electric telescopic rod 5 can be used to drive the fixed cone 2 to move, so that it can be inserted into the ground to form a triangle shape while completing the position limiting work, thereby further increasing the stability of the device during use. By pulling the pull rod 21, the limit block 20 can be driven to move. When the limit block 20 moves, the telescopic spring 24 is compressed. The resilient force of the telescopic spring 24 can reset the limiting block 20 so that it snaps into the inside of the limiting groove 19 to complete the limiting work of the splint 17 .
以上所述,仅为本实用新型较佳的具体实施方式,但本实用新型的保护范围并不局限于此,任何熟悉本技术领域的技术人员在本实用新型揭露的技术范围内,根据本实用新型的技术方案及其实用新型构思加以等同替换或改变,都应涵盖在本实用新型的保护范围之内。The above is only a preferred specific embodiment of the utility model, but the scope of protection of the utility model is not limited thereto. Any person familiar with the technical field within the technical scope disclosed in the utility model, according to the technical scheme of the utility model and its utility model design to make equivalent replacements or changes, should be covered within the scope of protection of the utility model.
Claims (6)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320643445.6U CN219413767U (en) | 2023-03-28 | 2023-03-28 | A pipeline stabilization mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320643445.6U CN219413767U (en) | 2023-03-28 | 2023-03-28 | A pipeline stabilization mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219413767U true CN219413767U (en) | 2023-07-25 |
Family
ID=87231047
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320643445.6U Expired - Fee Related CN219413767U (en) | 2023-03-28 | 2023-03-28 | A pipeline stabilization mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219413767U (en) |
-
2023
- 2023-03-28 CN CN202320643445.6U patent/CN219413767U/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN209510274U (en) | Linkage on a kind of drilling rod can be realized automatic angle adjusting | |
| CN219413767U (en) | A pipeline stabilization mechanism | |
| CN218625716U (en) | Water conservancy and hydropower pipeline construction auxiliary positioning equipment | |
| CN220749246U (en) | Municipal pipeline embeds pipeline support fixed bolster | |
| CN221348209U (en) | Pipeline support for water supply and drainage engineering convenient to installation | |
| CN221160125U (en) | A pipeline docking auxiliary tool for pipeline network transformation | |
| CN215172750U (en) | Pipe discharging device for geothermal energy vertical pipeline | |
| CN222798317U (en) | Pipeline supporting device | |
| CN218761829U (en) | Pipeline strutting arrangement for building | |
| CN117052991A (en) | Water and electricity engineering pipeline installation equipment | |
| CN222209249U (en) | A new type of pipeline installation structure | |
| CN220699551U (en) | Multi-pipe-diameter clamping device for pipeline production | |
| CN216590288U (en) | Positioner is used in piping erection | |
| CN218698180U (en) | Auxiliary connecting and fixing device for pipeline connector | |
| CN220647037U (en) | A pipe laying support device for water conservancy projects | |
| CN220059713U (en) | A kind of equipped exhaust pipe | |
| CN221300383U (en) | Pipeline supporting device | |
| CN222596972U (en) | A pipeline installation device for water conservancy and hydropower engineering | |
| CN221171088U (en) | Positioner that municipal heating pipeline was laid usefulness | |
| CN218613703U (en) | Auxiliary mounting structure for industrial building pipe | |
| CN221004097U (en) | Heating pipeline bracket | |
| CN219054174U (en) | Steel pipe processing auxiliary device | |
| CN216715399U (en) | Connecting device for municipal water supply pipeline | |
| CN219933196U (en) | Construction auxiliary positioning equipment | |
| CN223635718U (en) | District ground heating pipeline infiltration prosthetic devices |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20230725 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |