Pipe support device and method

Abstract

This invention discloses a protective sleeve support device and method. Its structure includes a support device, a support bar, a support plate, a stabilizing rod, and a baffle. The support device is fixed to the surface of the support plate with screws. The support bar is threadedly connected to the support device. The stabilizing rod is installed through the support plate. The baffle is snapped onto the support bar. The support device includes an elastomer, a dense strip, connecting threads, a sliding surface, connecting holes, raised patterns, a slider, connecting screw holes, an arc-shaped opening, a support opening, and a magnetic strip. The elastomer is installed on the inner surface of the support opening. The dense strip and the support opening are an integrated structure. This device uses mirror-polished polytetrafluoroethylene material to form a closed, smooth, vertical texture structure for the dense strip and raised patterns, which can effectively block crawling insects from climbing upwards and prevent them from approaching the protective sleeve. Simultaneously, the sliding surface and the elastomer adopt a layout with gradually decreasing contact surfaces, significantly reducing the contact space for crawling insects and further preventing them from intruding on and damaging the protective sleeve.

Description

Technical Field

[0001] This invention belongs to the field of pipeline support, and more specifically, relates to a pipe support device and method. Background Technology

[0002] The protective pipe support device is mainly used in outdoor installation scenarios to support, position and protect the protective pipe. It can achieve stable erection, limit protection and anti-displacement fixation of the protective pipe, effectively ensure that the outdoor protective pipe is arranged neatly and the stress is uniform, and reduce the risk of damage to the protective pipe caused by external vibration and environmental deformation.

[0003] Existing protective pipe support structures generally suffer from poor compatibility when installed in outdoor cement-based surfaces and soft soil areas. Due to the limited thickness of the outer cement protective layer and the relatively soft soil beneath, the support structure is prone to forming fixed stress points on the cement surface after installation. The anchoring strength of the support components buried in the soil is insufficient, making it easy for the supports to loosen, shift, and become unstable. At the same time, there are many crawling insects in outdoor soil areas. The surface of traditional support structures is rough and has many gaps for attachment and climbing. Crawling insects can easily climb up the support structure to the surface of the protective pipe, causing hazards such as biting, damage, and pollution. The safety and structural stability of the protective sleeve are difficult to guarantee. Summary of the Invention

[0004] To address the aforementioned technical problems, the objectives and effects of the pipe support device and method of the present invention are achieved through the following specific technical means:

[0005] Its structure includes a support device, a support bar, a support plate, a stabilizing rod, and a baffle. The support device is fixed to the surface of the support plate by screws. The support bar is threaded to the support device. The stabilizing rod is installed through the support plate. The baffle is snapped onto the support bar.

[0006] The support device includes an elastomer, a dense strip, a connecting thread, a sliding surface, a connecting hole, a raised texture, a slider, a connecting screw hole, an arc-shaped opening, a support opening, and a magnetic strip. The elastomer is installed on the inner surface of the support opening. The dense strip and the support opening are an integral structure. The connecting thread is fixed to the surface of the support opening. The connecting hole penetrates the interior of the sliding surface. The raised texture and the sliding surface are an integral structure. The slider and the support opening are an integral structure. The connecting screw hole penetrates the interior of the support opening. The arc-shaped opening is fixed to the surface of the support opening. The magnetic strip is embedded inside the support opening. There are four elastomers, which are evenly distributed in a circle.

[0007] As a further improvement of the present invention, the support bar includes a screw opening, an extension rod, and a screw head. The screw opening is threadedly connected to the extension rod, and the screw head is threadedly connected to the extension rod. The screw opening is connected to the screw head through the extension rod, and the screw head achieves precise thread locking with the connecting screw hole.

[0008] As a further improvement of the present invention, the baffle includes a smooth surface and a locking head, wherein the locking head and the smooth surface are an integrated structure, and the locking head enables quick assembly and disassembly of the baffle and the support strip.

[0009] As a further improvement of the present invention, the length and bending angle of the baffle and the support bar are adapted to each other. The baffle is narrow at the top and wide at the bottom. A set of five support bars is provided. The length and bending angle of the baffle and the support bar can be changed as needed. The narrow top and wide bottom of the baffle can prevent the accumulation of nesting materials for birds.

[0010] As a further improvement of the present invention, the elastomer is an arc-shaped elastic cylinder structure, which provides elastic support for the protective sleeve. The dense strips and ridges are evenly spaced ridges, and the surface is made of mirror-polished polytetrafluoroethylene. The connecting thread and connecting screw hole auxiliary support strip are connected to the support device. The smooth surface is made of mirror-polished polytetrafluoroethylene. The slider is narrow at the top and wide at the bottom. The slider and the dense strips are made of the same material. The support opening is divided into upper and lower parts that are magnetically fixed by magnetic strips. The dense strips and ridges form a closed, vertically smooth structure to prevent crawling insects from climbing.

[0011] As a further improvement of the present invention, the support plate includes a top rod, a limiting cylinder, an extension plate, and a main plate. The top rod is threadedly fixed to the limiting cylinder, the extension plate is located inside the limiting cylinder and can extend, the limiting cylinder and the main plate are an integrated structure, and the main plate is an integral load-bearing base component.

[0012] As a further improvement of the present invention, the limiting cylinder includes a threaded opening, a movable opening, a main cylinder, and a cone head. The threaded opening and the main cylinder are an integral structure. The movable opening penetrates the interior of the main cylinder. The cone head is an integral structure with the main cylinder. The cone head facilitates the insertion of the limiting cylinder into the soil.

[0013] As a further improvement of the present invention, the extension plate includes a spring layer and an extension plate, the two ends of the spring layer are connected to the extension plate, and the spring layer can enable the extension plate to be extended under pressure.

[0014] As a further improvement of the present invention, the push rod includes a threaded cap, a push rod, and a push head. The push head and the push rod are an integral structure. The threaded cap is fixed to the surface of the push rod, and the push head is used to squeeze and push the extension plate to extend.

[0015] As a further improvement of the present invention, the pipe support device has the following pipe support method:

[0016] S1: Drill holes in the cement surface corresponding to the stabilizing rod, press the support plate against the cement surface, and at the same time move the limiting cylinder into the soil along the hole. Insert the top rod to open the extension plate and fix it between the cement surface and the soil. The top rod and the limiting cylinder are threaded together.

[0017] S2: Place the protective sleeve in the required position. The support device is fixed to the support plate by screws through the connecting hole. After assembling the lower half, place the protective sleeve in the support opening and then assemble the upper half. The upper and lower parts are magnetically fixed by magnetic strips. The internal elastic body provides elastic support for the protective sleeve.

[0018] S3: After the protective sleeve is fixed, the screw head and the connecting screw hole are threaded together. The extension rod is changed to the required length and bending angle according to the installation range of the protective sleeve. The other side of the extension rod is connected by the screw hole. The next extension rod is connected in series and finally fixed to the connecting thread of the corresponding end support device.

[0019] S4: After the support bar is assembled, the baffle is snapped onto the extension rod with a clip, so that the smooth side can provide external protection for the protective sleeve.

[0020] The stabilizing rod penetrates the support plate simultaneously to further enhance the overall anchoring effect.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] Firstly, this device uses mirror-polished polytetrafluoroethylene material to form a closed and smooth vertical textured structure through dense strips and embossed patterns. This can effectively block crawlers from climbing upwards and prevent them from approaching the protective sleeve. At the same time, the sliding surface and elastomer adopt a layout with gradually decreasing contact area, which greatly reduces the contact space of the crawlers and further prevents the crawlers from intruding on and damaging the protective sleeve.

[0023] Secondly, the sliding surface, slider, and baffle are all designed with a sloping surface that is narrow at the top and wide at the bottom, without any horizontal and stable footing area. This can effectively prevent birds from staying and roosting for a long time, and also allow nesting materials such as weeds, bird droppings, and dead branches to slide off automatically, preventing them from accumulating and forming bird nests. This avoids the potential risks of pressure and corrosion on the protective sleeve caused by birds building nests from the source.

[0024] Thirdly, when the support plate is assembled and fixed on the cement installation base, the rear stabilizing rod extends into the soil to achieve initial positioning. After the extension plate is opened, it comes into contact with the soil, which can greatly improve the pull-out resistance and overturning resistance of the main plate, enhance the installation stability of the overall structure in complex ground environments, and effectively resist the problems of bracket loosening and displacement caused by vibration and external impact.

[0025] Fourth, the support bar adopts a screw-in and extension rod splicing structure, which can be flexibly selected and assembled according to the length and bending angle of the on-site protective sleeve. It is suitable for different terrains and installation spans, has strong versatility, and facilitates precise docking and installation between multiple support devices. Attached Figure Description

[0026] Figure 1This is a schematic diagram of the structure of the pipe support device of the present invention.

[0027] Figure 2 This is a partial structural schematic diagram of the pipe support device of the present invention.

[0028] Figure 3 This is a partial rear view of the structure of the protective pipe support device of the present invention.

[0029] Figure 4 This is a schematic diagram of the support device of the present invention.

[0030] Figure 5 This is a schematic diagram of the cross-sectional structure of the support device of the present invention.

[0031] Figure 6 This is a schematic diagram of the support strip of the present invention.

[0032] Figure 7 This is a schematic diagram of the structure of the baffle of the present invention.

[0033] Figure 8 This is a schematic diagram of the stabilizing rod of the present invention.

[0034] Figure 9 This is a schematic diagram of the structure of the limiting cylinder of the present invention.

[0035] Figure 10 This is a schematic diagram of the structure of the extension plate of the present invention.

[0036] Figure 11 This is a schematic diagram of the top rod of the present invention.

[0037] In the diagram: Support device-1, Support bar-2, Support plate-3, Stabilizing rod-4, Baffle-5, Elastomer-11, Dense strip-12, Connecting thread-13, Smooth surface-14, Connecting hole-15, Raised texture-16, Slider-17, Connecting screw hole-18, Arc opening-19, Support opening-110, Magnetic strip-111, Screw opening-21, Extension rod-22, Screw head-23, Smooth surface-51, Clamp head-52, Top rod-31, Limiting cylinder-32, Extension plate-33, Main plate-34, Threaded opening-61, Movable opening-62, Main cylinder-63, Cone head-64, Resilient layer-71, Extension plate-72, Threaded cap-81, Push rod-82, Top head-83. Detailed Implementation

[0038] The present invention will be further described below with reference to the accompanying drawings:

[0039] Example 1:

[0040] As attached Figure 1 To be continued Figure 7 As shown:

[0041] The present invention provides a pipe support device and method, the structure of which includes a support device 1, a support bar 2, a support plate 3, a stabilizing rod 4, and a baffle 5. The support device 1 is fixed to the surface of the support plate 3 by screws, the support bar 2 is threadedly connected to the support device 1, the stabilizing rod 4 is installed through the support plate 3, and the baffle 5 is snapped onto the support bar 2.

[0042] The support device 1 includes an elastic body 11, a dense strip 12, a connecting thread 13, a sliding surface 14, a connecting hole 15, a raised texture 16, a slider 17, a connecting screw hole 18, an arc opening 19, a support opening 110, and a magnetic strip 111. The elastic body 11 is installed on the inner surface of the support opening 110. The dense strip 12 and the support opening 110 are an integral structure. The connecting thread 13 is fixed to the surface of the support opening 110. The connecting hole 15 penetrates the interior of the sliding surface 14. The raised texture 16 and the sliding surface 14 are an integral structure. The slider 17 and the support opening 110 are an integral structure. The connecting screw hole 18 penetrates the interior of the support opening 110. The arc opening 19 is fixed to the surface of the support opening 110. The magnetic strip 111 is embedded in the interior of the support opening 110. There are four elastic bodies 11, which are evenly distributed in a circle. The support strip 111 connects two support devices 1.

[0043] The support bar 2 includes a screw hole 21, an extension rod 22, and a screw head 23. The screw hole 21 is threadedly connected to the extension rod 22, and the screw head 23 is threadedly connected to the extension rod 22. The screw hole 21 is connected to the screw head 23 through the extension rod 22. The screw head 23 is precisely threadedly locked with the connecting screw hole 18. The screw hole 21 is used to realize the series assembly between multiple extension rods 22.

[0044] The baffle 5 includes a smooth surface 51 and a locking head 52. The locking head 52 and the smooth surface 51 are an integrated structure. The locking head 52 enables quick assembly and disassembly of the baffle 5 and the support strip 2. The smooth surface 51 is used to block and guide rainwater and prevent direct sunlight.

[0045] The baffle 5 and the support bar 2 are adapted to each other in length and bending angle. The baffle 5 is narrow at the top and wide at the bottom. There are five support bars in a set. The baffle 5 and the support bar 2 can be replaced with the required length and bending angle as needed. The baffle 5 is narrow at the top and wide at the bottom to prevent the accumulation of nesting materials for birds. The support bar 2 is connected by threads to improve the stability of the baffle 5 installation.

[0046] The elastic body 11 is an arc-shaped elastic cylinder structure that provides elastic support for the protective sleeve. The dense strips 12 and the raised patterns 16 are evenly spaced raised patterns, and their surfaces are made of mirror-polished polytetrafluoroethylene. The connecting thread 13 and the connecting screw hole 18 are connected to the auxiliary support strip 2 and the support device 1. The surface of the sliding surface 14 is made of mirror-polished polytetrafluoroethylene. The slider 17 is narrow at the top and wide at the bottom. The slider 17 is made of the same material as the dense strips 12. The support opening 110 consists of two parts, the upper and lower parts, which are magnetically fixed by magnetic strips 111. The dense strips 12 and the raised patterns 16 form a closed, vertically smooth structure to prevent crawling insects from climbing. The sliding surface 14 uses low-friction characteristics to prevent bird droppings and weeds from sticking and accumulating.

[0047] The support plate 3 includes a top rod 31, a limiting cylinder 32, an extension plate 33, and a main plate 34. The top rod 31 is threadedly fixed to the limiting cylinder 32. The extension plate 33 is located inside the limiting cylinder 32 and can extend. The limiting cylinder 32 and the main plate 34 are an integrated structure. The main plate 34 is an integral load-bearing base component. The extension plate 33 can improve the installation stability of the support plate 3 after it extends.

[0048] The specific usage and function of this embodiment are as follows:

[0049] In this invention, mounting holes adapted to the stabilizing rod 4 are made on the cement surface. The support plate 3 is placed on the cement surface, and the stabilizing rod 4 passes through the corresponding holes and extends into the soil for fixation. Then, the protective sleeve is laid out to the preset installation position. First, the lower half of the support device 1 is fixed to the surface of the support plate 3 with screws through the connecting hole 15, so that the protective sleeve is stably placed inside the support opening 110 and elastically supported by the arc-shaped support surface of the elastic body 11. After the protective sleeve is in place, the upper half of the support device 1 is fixed to the support plate 3 with screws through the connecting hole 15. The upper and lower parts of the support device 1 are magnetically assisted in positioning by magnetic strips 111, so that only the arc-shaped support surface of the elastic body 11 is in direct contact with the protective sleeve. When the crawler climbs from the support plate 3 to the protective sleeve, the crawling path is reduced by decreasing the contact area between the support device 1 and the support plate 3. If the crawler climbs to the area of ​​the support device 1, it relies on the ridges 16 and the dense strips 12 to support the insect. The sealed vertical texture and mirror-polished PTFE material block the crawling path. The arc-shaped structure of the arc opening 19, formed by the sealed texture, further prevents the crawler from climbing upwards. The protective sleeve is stably supported by the small contact surface of the elastomer 11, which greatly reduces the range that the crawler can access. After the protective sleeve is positioned, the screw head 23 is screwed into the connecting screw hole 18 to lock and fix it. According to the actual layout spacing and the direction of the protective sleeve, the corresponding length and bending angle of the extension rod 22 are selected to connect the adjacent support device 1. Each extension rod 22 is connected in series through the screw hole 21. The end extension rod 22 is threaded and locked to the connecting thread 13 of the next support device 1 through the screw hole 21. The baffle 5 that is compatible with the support bar 2 is selected and assembled on the assembled support bar 2 by the snap fastener 52. The smooth surface 51 forms a shield and protection above the protective sleeve, which can block the crawler, prevent birds from nesting and prevent the accumulation of debris.

[0050] Example 2:

[0051] As attached Figure 8 To be continued Figure 11 As shown:

[0052] The limiting cylinder 32 includes a threaded opening 61, a movable opening 62, a main cylinder 63, and a cone head 64. The threaded opening 61 and the main cylinder 63 are an integral structure. The movable opening 62 penetrates the interior of the main cylinder 63. The cone head 64 is an integral structure with the main cylinder 63. The cone head 64 facilitates the insertion of the limiting cylinder 32 into the soil. The movable opening 62 is used for the extension plate 33 to extend outward.

[0053] The extension plate 33 includes a resilient layer 71 and an extension plate 72. The resilient layer 71 is connected to the extension plate 72 at both ends. The resilient layer 71 can enable the extension plate 72 to be extended under pressure. After the extension plate 72 is extended, it is supported behind the cement surface and in contact with the soil.

[0054] The push rod 31 includes a threaded cap 81, a push rod 82, and a push head 83. The push head 83 and the push rod 82 are an integral structure. The threaded cap 81 is fixed to the surface of the push rod 82. The push head 83 is used to press and push the extension plate 72 to extend. The threaded cap 81 is used to be threadedly connected to the end of the limiting cylinder 32 for locking and positioning.

[0055] The pipe support device described herein employs the following pipe support method:

[0056] S1: Drill holes in the cement surface corresponding to the stabilizing rod 4, press the support plate 3 onto the cement surface, and at the same time move the limiting cylinder 32 into the soil along the hole. Insert the top rod 31 to open the extension plate 33 and fix it between the back of the cement surface and the soil. The top rod 31 and the limiting cylinder 32 are threaded together.

[0057] S2: Place the protective sleeve in the required position. The support device 1 is fixed to the support plate 3 by screws through the connecting hole 15. After assembling the lower half, place the protective sleeve in the support port 110 and then assemble the upper half. The upper and lower parts are magnetically fixed by magnetic strip 111. The internal elastic body 11 provides elastic support for the protective sleeve.

[0058] S3: After the protective sleeve is fixed, the screw head 23 is threaded to the connecting screw hole 18. The extension rod 22 is changed to the required length and bending angle according to the installation range of the protective sleeve. The other side of the extension rod 22 is connected by the screw hole 21. The next extension rod 22 is connected in series and finally fixed at the connecting thread 13 of the corresponding end support device 1.

[0059] S4: After the support bar 2 is assembled, the baffle 5 is snapped onto the extension rod 22 by the clip 52, and the smooth surface 51 provides external protection for the protective sleeve.

[0060] The stabilizing rod 4 penetrates the support plate 3 simultaneously to further enhance the overall anchoring effect, and the extension rod 22 is composed of multiple segments to suit different layout directions.

[0061] The specific usage and function of this embodiment are as follows:

[0062] In this invention, during installation, the stabilizing rod 4 extends into the soil along the corresponding installation hole. The cone head 64 reduces the resistance to soil entry, assisting the stabilizing rod 4 to smoothly move into the soil. Then, the top rod 31 is inserted into the internal channel of the limiting cylinder 32. The top head 83 pushes the push rod 82 to move towards the center position of the extension plate 72. The push rod 82 pushes the extension plate 72 outward from the movable opening 62. The rebound layer 71 extends and opens simultaneously with the extension plate 72, so that the extension plate 72 is clamped to the back of the cement surface and extends into the soil to complete the anchoring. The threaded cap 81 is tightened to lock it with the threaded opening 61, realizing the opening and positioning of the extension plate 33 and ensuring that the main plate 34 is stably fixed in the soil area. During disassembly, the threaded cap 81 is loosened in the opposite direction to disengage it from the threaded opening 61. The rebound layer 71 uses its own rebound force to drive the extension plate 72 to reset and retract, so that the limiting cylinder 32 can be removed from the installation position as a whole.

[0063] Any technical solution that achieves the above-mentioned technical effects by utilizing the technical solutions described in this invention, or by designing similar technical solutions by those skilled in the art under the inspiration of the technical solutions described in this invention, falls within the protection scope of this invention.

Claims

1. A pipe support device, comprising a support device (1), a support bar (2), a support plate (3), a stabilizing rod (4), and a baffle (5), wherein the support device (1) is fixed to the surface of the support plate (3) by screws, the support bar (2) is threadedly connected to the support device (1), the stabilizing rod (4) is installed through the support plate (3), and the baffle (5) is snapped onto the support bar (2), characterized in that: The support device (1) includes an elastic body (11), a dense strip (12), a connecting thread (13), a sliding surface (14), a connecting hole (15), a raised pattern (16), a slider (17), a connecting screw hole (18), an arc opening (19), a support opening (110), and a magnetic strip (111). The elastic body (11) is installed on the inner surface of the support opening (110). The dense strip (12) and the support opening (110) are an integrated structure. The connecting thread (13) is fixed to the surface of the support opening (110). The connecting hole (15) penetrates the interior of the sliding surface (14). The raised pattern (16) and the sliding surface (14) are an integrated structure. The slider (17) and the support opening (110) are an integrated structure. The connecting screw hole (18) penetrates the interior of the support opening (110). The arc opening (19) is fixed to the surface of the support opening (110). The magnetic strip (111) is embedded inside the support opening (110).

2. The pipe support device according to claim 1, characterized in that: The support bar (2) includes a screw hole (21), an extension rod (22), and a screw head (23). The screw hole (21) is threadedly connected to the extension rod (22), and the screw head (23) is threadedly connected to the extension rod (22). The screw hole (21) is connected to the screw head (23) through the extension rod (22).

3. The pipe support device according to claim 1, characterized in that: The baffle (5) includes a smooth surface (51) and a locking head (52), wherein the locking head (52) and the smooth surface (51) are an integrated structure.

4. The pipe support device according to claim 1, characterized in that: The length and bending angle of the baffle (5) and the support bar (2) are adapted to each other. The baffle (5) is narrow at the top and wide at the bottom. There are five support bars in a set. The length and bending angle of the baffle (5) and the support bar (2) can be changed as needed.

5. The pipe support device according to claim 1, characterized in that: The elastic body (11) is an arc-shaped elastic cylinder structure, which provides elastic support for the protective sleeve. The dense strip (12) and the raised pattern (16) are evenly spaced raised patterns, and the surface is made of mirror-polished polytetrafluoroethylene. The connecting thread (13) and the connecting screw hole (18) are connected to the auxiliary support strip (2) and the support device (1). The surface of the sliding surface (14) is made of mirror-polished polytetrafluoroethylene. The slider (17) is narrow at the top and wide at the bottom. The slider (17) is made of the same material as the dense strip (12). The support opening (110) is divided into two parts, the upper and lower parts, which are magnetically fixed by the magnetic strip (111).

6. The pipe support device according to claim 1, characterized in that: The support plate (3) includes a top rod (31), a limiting cylinder (32), an extension plate (33), and a main plate (34). The top rod (31) is threadedly fixed to the limiting cylinder (32). The extension plate (33) is located inside the limiting cylinder (32) and can be extended. The limiting cylinder (32) and the main plate (34) are an integrated structure.

7. The pipe support device according to claim 6, characterized in that: The limiting cylinder (32) includes a threaded opening (61), a movable opening (62), a main cylinder (63), and a cone head (64). The threaded opening (61) and the main cylinder (63) are an integrated structure. The movable opening (62) penetrates the interior of the main cylinder (63). The cone head (64) and the main cylinder (63) are an integrated structure.

8. The pipe support device according to claim 6, characterized in that: The extension plate (33) includes a spring layer (71) and an extension plate (72), with both ends of the spring layer (71) connected to the extension plate (72).

9. The pipe support device according to claim 6, characterized in that: The push rod (31) includes a threaded cap (81), a push rod (82), and a top (83). The top (83) and the push rod (82) are an integrated structure, and the threaded cap (81) is fixed to the surface of the push rod (82).

10. A method for supporting protective pipes, characterized in that: The pipe support device according to any one of claims 1-9 has the following pipe support method: S1: Drill holes in the cement surface corresponding to the stabilizing rod (4), press the support plate (3) on the cement surface, and at the same time move the limiting cylinder (32) into the soil through the hole. Insert the top rod (31) to open the extension plate (33) and fix it between the back of the cement surface and the soil. The top rod (31) and the limiting cylinder (32) are threaded together. S2: Place the protective sleeve in the required position. The support device (1) is fixed to the support plate (3) by screws through the connecting hole (15). After assembling the lower half, place the protective sleeve in the support opening (110) and then assemble the upper half. The upper and lower parts are magnetically fixed by magnetic strips (111). The internal elastic body (11) provides elastic support for the protective sleeve. S3: After the protective sleeve is fixed, the screw head (23) and the connecting screw hole (18) are threaded together. The extension rod (22) is changed to the required length and bending angle according to the installation range of the protective sleeve. The other side of the extension rod (22) is connected by the screw hole (21). The next extension rod (22) is connected in series and finally fixed at the connecting thread (13) of the corresponding end support device (1). S4: After the support bar (2) is assembled, the baffle (5) is snapped onto the extension rod (22) by the clip (52), and the smooth surface (51) provides external protection for the protective sleeve.

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