Water taking device of environment monitoring unmanned aerial vehicle

Abstract

The invention relates to the technical field of ecological environment monitoring, and discloses an environment monitoring unmanned aerial vehicle water taking device which comprises an unmanned aerial vehicle body, a supporting frame, an assembly cylinder frame, a water taking cylinder, a partition plate, a water inlet groove, a closed groove, a supporting sleeve piece, a telescopic shaft, a packaging plug, a sealing gasket, a limiting piece and a spring. The interior of the water taking barrel is divided into multiple sets of water taking cavities with different heights through multiple sets of partition plates, after the unmanned aerial vehicle body places the water taking barrel into a water source, the water source can enter the water taking barrel through the water inlet groove, the packaging plug can be separated from the closed groove under water pressure extrusion, and the water source can enter the water taking cavities through the closed groove to be collected; after the water taking barrel completes collection and is taken out, the packaging plug can be reset and sealed through the spring under the condition of no water pressure, so that the water taking barrel can collect liquid levels at different heights in a water area in a centralized manner, and during subsequent sampling, the limiting piece is pressed to enable the packaging plug to move towards the interior of the water taking barrel again, so that the water source data detection accuracy is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of ecological environment monitoring, and in particular to a water extractor for an environmental monitoring drone. Background Art

[0002] The analysis of the content of elements such as nitrogen and phosphorus and related indicators in rivers and lakes is an important method for environmental science to study water pollution and eutrophication. Sampling is the first step in water environment monitoring. Only accurate sampling can ensure the smooth progress of water quality analysis. At present, when sampling waters, remote water sampling is performed through drones, and the bottom of the drone is equipped with a water collection mechanism to reduce the workload of staff.

[0003] When existing drones drive water intake mechanisms to take samples inside water sources, they only collect samples through the water intake trough holes of the water intake mechanism itself. However, water areas with different liquid levels inside the water source cannot be collected and compared centrally. The content cannot be accurately detected only through water source data at a single height, which affects the accuracy of water source data detection. For this reason, we propose a water collector for an environmental monitoring drone. Summary of the invention

[0004] The present invention mainly solves the technical problems existing in the above-mentioned prior art and provides a water dispenser for an environmental monitoring drone.

[0005] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a water collector for an environmental monitoring drone, comprising a drone body, a support frame fixedly installed on the bottom of the drone body through a connecting shaft, the support frame being a U-shaped structure, an assembly tube frame being arranged inside the support frame, a water collecting tube movably assembled with the assembly tube frame being arranged on one side of the assembly tube frame, a plurality of groups of partitions being fixedly installed on the inner side of the water collecting tube, a water inlet groove penetrating the interior of the water collecting tube is arranged on the outer periphery of the water collecting tube, a closing groove connected with the water inlet groove is arranged on the inner side of the water collecting tube, a support kit is installed on the inner side support of the water inlet groove, a telescopic shaft is arranged inside the support kit, a sealing plug which is sealed with the inner side of the closing groove is arranged at one end of the telescopic shaft, a sealing gasket is arranged on the inner side of the closing groove, a limiting plate is arranged on the other end of the telescopic shaft, and a spring which is supported and connected with the limiting plate is arranged on the outer sleeve of the telescopic shaft.

[0006] Preferably, the interior of the water intake cylinder is divided into several groups of water intake chambers by several groups of partitions. When the water intake cylinder goes deep into the water to take water, the water intake cylinder presents various water intake states for water sources at different heights through several groups of water inlet troughs.

[0007] Preferably, in a default state, the sealing plug is in elastic cooperation with the spring outside the telescopic shaft, and one side of the sealing plug is in a closed and sealed state with the inner side of the closed groove through a sealing gasket.

[0008] Preferably, when the surface of the sealing plug is squeezed by water pressure, the sealing plug slides open toward the inside of the water intake cylinder through the telescopic axis.

[0009] Preferably, a connecting sleeve is installed on the periphery of the water intake cylinder at a position corresponding to the water inlet groove, a first installation groove is provided on the periphery of the connecting sleeve, a sealed installation cover is provided at one end of the connecting sleeve, an external thread is provided on the periphery of the first installation groove, an internal thread is provided on the inner side of the installation cover, a second installation groove is provided at one end of the installation cover, and a barrier filter is provided inside the second installation groove to block foreign objects.

[0010] Preferably, the inner side of the mounting cover is threadably connected with the outer thread on the surface of the first mounting groove via an inner thread.

[0011] Preferably, after the water collection cylinder is placed in the water source, the installation cover is in a blocking and protective state against foreign objects in the water source through a blocking filter.

[0012] Preferably, the assembly cylinder frame includes a connecting piece, a base plate, and an assembly clip. The connecting piece and the base plate are fixedly connected and matched. Assembly clips for clamping the water intake cylinder are integrally formed on both sides of the connecting piece, and the assembly clips themselves have deformation characteristics.

[0013] Preferably, circular grooves are provided at the lower positions on both sides of the support frame, and a circular shaft connected to the assembly cylinder frame support is rotatably connected inside the circular groove.

[0014] Preferably, connecting screw holes are provided on both sides of the support frame, and fixing bolts for fixing the assembly tube frame are threadedly connected inside the connecting screw holes, and docking screw holes for locking with the fixing bolts are provided on the periphery of the connecting piece.

[0015] The present invention provides a water dispenser for an environmental monitoring drone. It has the following beneficial effects:

[0016] 1. A water collecting device for an environmental monitoring UAV. In this article, the UAV body can drive the water collecting cylinder to move after starting the flight, and the water collecting cylinder is clamped and fixed inside the assembly cylinder frame. The interior of the water collecting cylinder is divided into multiple groups of water collecting chambers with different heights by multiple groups of partitions. After the UAV body puts the water collecting cylinder into the water source, the water source can enter it through the water inlet groove outside the water collecting cylinder, and the sealing plug inside the closed groove can be telescopically moved to the inside of the water collecting cylinder and separated from the closed groove under the pressure of water pressure, and the water source can enter the water collecting chamber through the closed groove for collection. After the water collecting cylinder completes the collection and takes it out, the sealing plug can be reset and rebounded by the spring without water pressure, so that the sealing gasket on the inside of the closed groove is reclosed and sealed, so that the water collecting cylinder can collect the liquid levels at different heights inside the water area in a centralized manner. During subsequent sampling, the limit plate can be pressed to move the sealing plug back to the inside of the water collecting cylinder, thereby achieving the effect of improving the accuracy of water source data detection.

[0017] 2. A water collector for an environmental monitoring drone, wherein a connecting sleeve is installed on the periphery of the water collecting tube at a position corresponding to the water inlet tank, one end of the connecting sleeve is threadedly installed with a mounting cover through a first mounting groove, and an isolation filter is arranged inside the mounting cover through a second mounting groove. When the water collecting tube goes deep into the water source for sampling, the water source can first flow into the water inlet tank through the isolation filter, and the isolation filter can block foreign matter in the water source to prevent foreign matter and impurities from clogging the water inlet tank, thereby achieving the effect of automatically blocking and intercepting foreign matter and impurities to ensure the normal circulation of the water source for sampling.

[0018] 3. A water collector for an environmental monitoring drone, the outer periphery of the connecting piece is rotatably connected to the circular groove inside the support frame through a circular shaft, and multiple sets of assembly clips are integrally formed on both sides of the connecting piece, and the assembly clips themselves have deformation elasticity. When the water collecting cylinder is installed inside the assembly cylinder frame, the assembly cylinder frame can be located inside the support frame and rotated to a horizontal state, and the water collecting cylinder can be clamped and installed inside the assembly cylinder frame, and then the assembly cylinder frame can be rotated to the inside of the support frame to reset to a vertical state. At this time, the fixing bolt inside the connecting screw hole can be controlled to rotate to the threaded connection inside the docking screw hole to lock the limit position, and the disassembly is similar, thereby achieving the effect of facilitating the disassembly and assembly of the water collecting cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the implementation of the present invention or the technical solution in the prior art, the following is a brief introduction to the drawings required for the implementation or the prior art description. Obviously, the drawings described below are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0020] The structures, proportions, sizes, etc. illustrated in this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with the technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantial technical significance. Any structural modification, change in proportion or adjustment of size shall still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 It is a partial schematic diagram of the water taking tube of the present invention;

[0023] Figure 3 For the present invention Figure 1 A magnified view of middle;

[0024] Figure 4 For the present invention Figure 2 Enlarged view of middle B;

[0025] Figure 5 For the present invention Figure 1 Enlarged view of middle C;

[0026] Figure 6 For the present invention Figure 1 Enlarged view of D in the middle.

[0027] Legend:

[0028] 1. UAV body; 2. Connecting shaft; 3. Support frame; 4. Assembly cylinder frame; 5. Connecting piece; 6. Bottom plate; 7. Assembly clip; 8. Round groove; 9. Round shaft; 10. Water intake cylinder; 11. Partition; 12. Water inlet groove; 13. Closing groove; 14. Support kit; 15. Telescopic shaft; 16. Packing plug; 17. Sealing gasket; 18. Limiting piece; 19. Spring; 20. Connecting sleeve; 21. First installation groove; 22. Installation cover; 23. External thread; 24. Internal thread; 25. Second installation groove; 26. Barrier filter; 27. Connecting screw hole; 28. Fixing bolt; 29. ​​Docking screw hole. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] Embodiment 1: A water dispenser for an environmental monitoring drone, such as Figure 1-Figure 4As shown, it includes an unmanned aerial vehicle body 1, a support frame 3 is fixedly installed on the bottom of the unmanned aerial vehicle body 1 through a connecting shaft 2, the support frame 3 is a U-shaped structure, an assembly cylinder frame 4 is arranged inside the support frame 3, a water intake cylinder 10 movably assembled with the assembly cylinder frame 4 is arranged on one side of the assembly cylinder frame 4, a plurality of partitions 11 are fixedly installed on the inner side of the water intake cylinder 10, a water inlet groove 12 penetrating the inside of the water intake cylinder 10 is opened on the periphery of the water intake cylinder 10, a closing groove 13 connected with the water inlet groove 12 is opened on the inner side of the water intake cylinder 10, a support kit 14 is installed on the inner side of the water inlet groove 12, a telescopic shaft 15 is arranged inside the support kit 14, a sealing plug 16 that is sealed with the inner side of the closing groove 13 is installed at one end of the telescopic shaft 15, a sealing gasket 17 is arranged on the inner side of the closing groove 13, a limiting plate 18 is installed on the other end of the telescopic shaft 15, and a spring 19 supported and connected to the limiting plate 18 is sleeved on the outer side of the telescopic shaft 15.

[0031] Furthermore, the interior of the water intake cylinder 10 is divided into a plurality of water intake chambers by a plurality of partitions 11. When the water intake cylinder 10 is immersed in the water to take water, the water intake cylinder 10 presents various water intake states for water sources at different heights through a plurality of water inlet slots 12.

[0032] Furthermore, in a default state, the sealing plug 16 is in a closed and sealed state with the inner side of the closed groove 13 via the sealing gasket 17 under the elastic cooperation of the spring 19 outside the telescopic shaft 15 .

[0033] Furthermore, when the surface of the sealing plug 16 is squeezed by water pressure, the sealing plug 16 slides and opens toward the inside of the water intake tube 10 through the telescopic shaft 15 .

[0034] Embodiment 2: A water dispenser for an environmental monitoring drone, such as Figure 1-Figure 5 As shown, it includes an unmanned aerial vehicle body 1, a support frame 3 is fixedly installed at the bottom of the unmanned aerial vehicle body 1 through a connecting shaft 2, the support frame 3 is a U-shaped structure, an assembly cylinder frame 4 is arranged inside the support frame 3, and a water collection cylinder 10 movably assembled with the assembly cylinder frame 4 is arranged on one side of the assembly cylinder frame 4, a plurality of groups of partitions 11 are fixedly installed inside the water collection cylinder 10, and the interior of the water collection cylinder 10 is divided into a plurality of groups of water collection chambers by the plurality of groups of partitions 11, and a water inlet penetrating through the interior of the water collection cylinder 10 is provided on the periphery of the water collection cylinder 10 Groove 12, a closed groove 13 connected to the water inlet groove 12 is opened on the inner side of the water intake cylinder 10, a support kit 14 is installed on the inner side support of the water inlet groove 12, a telescopic shaft 15 is arranged inside the support kit 14, a sealing plug 16 which is sealed with the inner side of the closed groove 13 is installed at one end of the telescopic shaft 15, a sealing gasket 17 is arranged on the inner side of the closed groove 13, a limit plate 18 is installed on the other end of the telescopic shaft 15, and a spring 19 which is supported and connected to the limit plate 18 is sleeved on the outside of the telescopic shaft 15.

[0035] Furthermore, the interior of the water intake cylinder 10 is divided into a plurality of water intake chambers by a plurality of partitions 11. When the water intake cylinder 10 is immersed in the water to take water, the water intake cylinder 10 presents various water intake states for water sources at different heights through a plurality of water inlet slots 12.

[0036] Furthermore, in the default state, the sealing plug 16 is in a closed and sealed state with the inner side of the closed groove 13 through the sealing gasket 17 under the elastic cooperation of the spring 19 outside the telescopic shaft 15. When the surface of the sealing plug 16 is squeezed by water pressure, the sealing plug 16 slides and opens toward the inside of the water intake barrel 10 through the telescopic shaft 15.

[0037] Furthermore, a connecting sleeve 20 is installed on the periphery of the water intake cylinder 10 at a position corresponding to the water inlet tank 12, a first installation groove 21 is provided on the periphery of the connecting sleeve 20, a sealed installation cover 22 is provided at one end of the connecting sleeve 20, an external thread 23 is provided on the periphery of the first installation groove 21, an internal thread 24 is provided on the inner side of the installation cover 22, a second installation groove 25 is provided at one end of the installation cover 22, and a blocking filter 26 for blocking foreign objects is provided inside the second installation groove 25.

[0038] Furthermore, the inner side of the mounting cover 22 is threadedly connected and matched with the outer thread 23 on the surface of the first mounting groove 21 through the inner thread 24 .

[0039] Furthermore, after the water-taking cylinder 10 is placed in the water source, the installation cover 22 is in a blocking and protective state against foreign matter in the water source through the blocking filter 26 .

[0040] Embodiment 3: A water dispenser for an environmental monitoring drone, such as Figure 1-Figure 6 As shown, it includes an unmanned aerial vehicle body 1, a support frame 3 is fixedly installed at the bottom of the unmanned aerial vehicle body 1 through a connecting shaft 2, the support frame 3 is a U-shaped structure, an assembly cylinder frame 4 is arranged inside the support frame 3, and a water collection cylinder 10 movably assembled with the assembly cylinder frame 4 is arranged on one side of the assembly cylinder frame 4, a plurality of groups of partitions 11 are fixedly installed inside the water collection cylinder 10, and the interior of the water collection cylinder 10 is divided into a plurality of groups of water collection chambers by the plurality of groups of partitions 11, and a water inlet penetrating through the interior of the water collection cylinder 10 is provided on the periphery of the water collection cylinder 10 Groove 12, a closed groove 13 connected to the water inlet groove 12 is opened on the inner side of the water intake cylinder 10, a support kit 14 is installed on the inner side support of the water inlet groove 12, a telescopic shaft 15 is arranged inside the support kit 14, a sealing plug 16 which is sealed with the inner side of the closed groove 13 is installed at one end of the telescopic shaft 15, a sealing gasket 17 is arranged on the inner side of the closed groove 13, a limit plate 18 is installed on the other end of the telescopic shaft 15, and a spring 19 which is supported and connected to the limit plate 18 is sleeved on the outside of the telescopic shaft 15.

[0041] Furthermore, the interior of the water intake cylinder 10 is divided into a plurality of water intake chambers by a plurality of partitions 11. When the water intake cylinder 10 is immersed in the water to take water, the water intake cylinder 10 presents various water intake states for water sources at different heights through a plurality of water inlet slots 12.

[0042] Furthermore, in the default state, the sealing plug 16 is in a closed and sealed state with the inner side of the closed groove 13 through the sealing gasket 17 under the elastic cooperation of the spring 19 outside the telescopic shaft 15. When the surface of the sealing plug 16 is squeezed by water pressure, the sealing plug 16 slides and opens toward the inside of the water intake barrel 10 through the telescopic shaft 15.

[0043] Furthermore, a connecting sleeve 20 is installed on the periphery of the water intake cylinder 10 at a position corresponding to the water inlet groove 12, a first installation groove 21 is provided on the periphery of the connecting sleeve 20, a sealed installation cover 22 is provided at one end of the connecting sleeve 20, an external thread 23 is provided on the periphery of the first installation groove 21, an internal thread 24 is provided on the inner side of the installation cover 22, a second installation groove 25 is provided at one end of the installation cover 22, a blocking filter 26 for blocking foreign matter is provided inside the second installation groove 25, the inner side of the installation cover 22 is threadedly connected with the external thread 23 on the surface of the first installation groove 21 through the internal thread 24, after the water intake cylinder 10 is placed in the water source, the installation cover 22 is in a blocking and protective state against foreign matter in the water source through the blocking filter 26.

[0044] Furthermore, the assembly cylinder frame 4 includes a connecting member 5, a base plate 6, and an assembly clip 7. The connecting member 5 and the base plate 6 are fixedly connected and matched. Both sides of the connecting member 5 are integrally formed with assembly clips 7 for clamping the water intake cylinder 10. The assembly clips 7 themselves have deformation characteristics.

[0045] Furthermore, circular grooves 8 are provided at the lower positions of both sides of the support frame 3 , and a circular shaft 9 connected to the assembly cylinder frame 4 is rotatably connected inside the circular groove 8 .

[0046] Furthermore, connecting screw holes 27 are provided on both sides of the support frame 3, and fixing bolts 28 for fixing the assembly tube frame 4 are threadedly connected to the connecting screw holes 27. The outer periphery of the connecting piece 5 is provided with docking screw holes 29 threadedly locked with the fixing bolts 28.

[0047] Working principle of the present invention:

[0048] After the drone body 1 starts to fly, it can drive the water collecting cylinder 10 to move, and the water collecting cylinder 10 is clamped and fixed inside the assembly cylinder frame 4. The inside of the water collecting cylinder 10 is divided into multiple groups of water collecting chambers with different heights by multiple groups of partitions 11. After the drone body 1 puts the water collecting cylinder 10 into the water source, the water source can enter the water collecting cylinder 10 through the water inlet groove 12 outside the water collecting cylinder 10, and the sealing plug 16 inside the closing groove 13 can be telescopically moved to the inside of the water collecting cylinder 10 and separated from the closing groove 13 under the pressure of water pressure, and the water source can enter the water collecting chamber through the closing groove 13 for collection. After the water collecting cylinder 10 completes the collection and takes out the water, the sealing plug 16 is closed. The plug 16 can be reset and rebounded by the spring 19 when there is no water pressure, so that the sealing gasket 17 on the inner side of the closed groove 13 can be reclosed and sealed. In this way, the water sampling tube 10 can collect the liquid levels at different heights inside the water area. During subsequent sampling, the limiting piece 18 can be pressed to move the sealing plug 16 back to the inside of the water sampling tube 10, thereby improving the accuracy of water source data detection. When the water sampling tube 10 goes deep into the water source for sampling, the water source can first enter the water inlet groove 12 through the blocking filter 26, and the blocking filter 26 can block foreign matter in the water source to prevent foreign matter and impurities from clogging the water inlet groove 12.

[0049] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A water dispenser for an environmental monitoring drone, comprising a drone body (1), characterized in that: A support frame (3) is fixedly mounted on the bottom of the unmanned aerial vehicle body (1) via a connecting shaft (2); the support frame (3) is a U-shaped structure; an assembly cylinder frame (4) is arranged inside the support frame (3); a water intake cylinder (10) movably assembled with the assembly cylinder frame (4) is arranged on one side of the assembly cylinder frame (4); a plurality of groups of partitions (11) are fixedly mounted inside the water intake cylinder (10); a water inlet groove (12) penetrating the inside of the water intake cylinder (10) is provided on the periphery of the water intake cylinder (10); a water inlet groove (12) movably assembled with the inside of the water intake cylinder (10) is provided on the inside of the water intake cylinder (10); A closed groove (13) connected to the water inlet groove (12), a support kit (14) is installed on the inner side support of the water inlet groove (12), a telescopic shaft (15) is arranged inside the support kit (14), one end of the telescopic shaft (15) is installed with a sealing plug (16) which is sealed with the inner side of the closed groove (13), a sealing gasket (17) is arranged on the inner side of the closed groove (13), the other end of the telescopic shaft (15) is installed with a limit plate (18), and the outer sleeve of the telescopic shaft (15) is provided with a spring (19) which is supported and connected with the limit plate (18).

2. The water dispenser for an environmental monitoring drone according to claim 1, characterized in that: The interior of the water intake cylinder (10) is divided into a plurality of water intake chambers by a plurality of partitions (11). When the water intake cylinder (10) is immersed in the water to take water, the water intake cylinder (10) presents various water intake states for water sources at different heights through a plurality of water inlet grooves (12).

3. The water dispenser for an environmental monitoring drone according to claim 1, characterized in that: In a default state, the sealing plug (16) is in elastic cooperation with the spring (19) outside the telescopic shaft (15), and one side of the sealing plug (16) is in a closed and sealed state with the inner side of the closed groove (13) through the sealing gasket (17).

4. The water dispenser for an environmental monitoring drone according to claim 3, characterized in that: When the surface of the sealing plug (16) is squeezed by water pressure, the sealing plug (16) is slidably opened toward the inside of the water intake cylinder (10) via the telescopic shaft (15).

5. The water dispenser for an environmental monitoring drone according to claim 2, characterized in that: A connecting sleeve (20) is installed on the periphery of the water intake cylinder (10) at a position corresponding to the water inlet tank (12), a first installation groove (21) is provided on the periphery of the connecting sleeve (20), a sealed installation cover (22) is provided at one end of the connecting sleeve (20), an external thread (23) is provided on the periphery of the first installation groove (21), an internal thread (24) is provided on the inner side of the installation cover (22), a second installation groove (25) is provided on one end of the installation cover (22), and a blocking filter (26) for blocking foreign matter is provided inside the second installation groove (25).

6. The water dispenser for an environmental monitoring drone according to claim 5, characterized in that: The inner side of the installation cover (22) is threadably connected and matched with the outer thread (23) on the surface of the first installation groove (21) via an inner thread (24).

7. The water dispenser for an environmental monitoring drone according to claim 5, characterized in that: After the water collection tube (10) is placed in a water source, the installation cover (22) is in a blocking and protective state against foreign matter in the water source through the blocking filter (26).

8. The water dispenser for an environmental monitoring drone according to claim 1, characterized in that: The assembly cylinder frame (4) comprises a connecting piece (5), a bottom plate (6), and an assembly clip (7); the connecting piece (5) and the bottom plate (6) are fixedly connected and matched; both sides of the connecting piece (5) are integrally formed with assembly clips (7) for clamping the water collection cylinder (10); and the assembly clips (7) themselves have deformation characteristics.

9. The water dispenser for an environmental monitoring drone according to claim 8, characterized in that: Circular grooves (8) are provided at the lower positions on both sides of the support frame (3), and a circular shaft (9) supported and connected to the assembly cylinder frame (4) is rotatably connected inside the circular groove (8).

10. The water dispenser for an environmental monitoring drone according to claim 9, characterized in that: Both sides of the support frame (3) are provided with connecting screw holes (27), the interior of the connecting screw holes (27) is threadedly connected with fixing bolts (28) for fixing the assembly tube frame (4), and the outer periphery of the connecting piece (5) is provided with docking screw holes (29) for thread-locking with the fixing bolts (28).

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