Protective device of manhole cover

Abstract

The invention relates to a deck structure of a ship, and discloses a protective device of a manhole cover, a plurality of studs are arranged on a seat ring of the manhole cover, and the protective device comprises a main supporting leg, a secondary supporting leg and horizontal round steel. The main supporting leg comprises a first vertical rod and a first horizontal sleeve, the first horizontal sleeve is fixed to the upper portion of the first vertical rod, and in the working state, the lower end of the first vertical rod is in threaded connection with the stud. The secondary supporting leg comprises a second vertical rod and a second horizontal sleeve, the first horizontal sleeve is fixed above the second vertical rod, and in a working state, the lower end of the second vertical rod is in threaded connection with the stud. The horizontal round steel penetrates through the first horizontal sleeve and the second horizontal sleeve, the first horizontal sleeve and the second horizontal sleeve are evenly arranged on the horizontal round steel, in the storage state, the first vertical rod and the second vertical rod are separated from the studs respectively, and the auxiliary supporting legs slide to be close to the main supporting legs. The primary supporting leg and the secondary supporting leg form stable supporting, and the two supporting legs can be drawn close to each other to achieve storage.

Description

Technical Field

[0001] The present application relates to a deck structure of a ship, and in particular to a protective device for a manhole cover. Background Art

[0002] At present, in the operation and maintenance of ships, various types of manhole covers are arranged on the cabin wall panels to meet the needs of passability and tightness. Among them, the flat manhole cover is installed on a horizontal platform. When it is open, protective measures must be set around the manhole opening. The passage provided by the manhole cover is convenient for personnel to enter and exit, but the large opening formed after it is opened will pose a serious threat to personnel safety if there is no protection.

[0003] In the existing protective structure, the main structure is directly fixed on the manhole cover through a one-way support. This support is arranged on one side, which is not stable enough and is prone to "shaking its head". In addition, the main structure and the support are directly welded and fixed, which takes up a lot of space after being removed.

[0004] Therefore, a solution is needed that can provide stable support when in use and can reduce space occupation when stored. Summary of the invention

[0005] The technical problem to be solved by the present application is: how to improve the stability of the protective device and reduce the space occupied during storage.

[0006] In order to solve the above technical problems, the present application provides a protective device for a manhole cover, wherein a plurality of studs are arranged on the seat ring of the manhole cover, and the protective device comprises: a main support leg, wherein the main support leg comprises a first vertical rod and a first horizontal sleeve, wherein the first horizontal sleeve is fixed above the first vertical rod, and when in the working state, the lower end of the first vertical rod is threadedly connected to the stud; a secondary support leg, wherein the secondary support leg comprises a second vertical rod and a second horizontal sleeve, wherein the first horizontal sleeve is fixed above the second vertical rod, and when in the working state, the lower end of the second vertical rod is threadedly connected to the stud; a horizontal round steel, wherein the horizontal round steel passes through the first horizontal sleeve and the second horizontal sleeve, and the first horizontal sleeve and the second horizontal sleeve are evenly arranged on the horizontal round steel, and when in the storage state, the first vertical rod and the second vertical rod are respectively separated from the stud, and the sliding secondary support leg is brought closer to the main support leg.

[0007] In one embodiment, the second horizontal sleeve is replaced by a collar, and the diameter of the collar is larger than the diameter of the horizontal round steel.

[0008] In one embodiment, the lengths of the main supporting legs and the secondary supporting legs are both smaller than the diameter of the horizontal round steel, so that the main supporting legs and the secondary supporting legs can be rotated into the horizontal round steel.

[0009] In one embodiment, the first vertical rod or the second vertical rod is a hollow tube; the main supporting leg also includes a first upper supporting plate and a first lower supporting plate, the first upper supporting plate is fixed above the first vertical rod, the first horizontal sleeve is fixed on the first upper supporting plate, the first lower supporting plate is fixed on the lower end of the first vertical rod, and the first vertical rod is threadedly connected to the stud through the first lower supporting plate; the secondary supporting leg also includes a second upper supporting plate and a second lower supporting plate, the second upper supporting plate is fixed above the second vertical rod, the sleeve is fixed on the second upper supporting plate, the second lower supporting plate is fixed on the lower end of the second vertical rod, and the second vertical rod is threadedly connected to the stud through the second lower supporting plate.

[0010] In one embodiment, the first lower supporting plate and the second lower supporting plate both include a first opening and a second opening; the protective device also includes a protective ring, the protective ring includes a horizontal sheet portion and a vertical sleeve portion, the horizontal sheet portion includes a third opening and a fourth opening, the vertical sleeve portion extends downward from the third opening, and the protective ring is connected to the first lower supporting plate or the second lower supporting plate through the fourth opening; wherein the third opening is coaxial with the first opening, the fourth opening is coaxial with the second opening, the diameter of the first opening is larger than the outer diameter of the vertical sleeve portion, the inner diameter of the vertical sleeve portion is larger than the diameter of the stud, and the vertical sleeve portion is assembled between the stud and the first opening.

[0011] In one embodiment, the protection ring is made of elastic material.

[0012] In one embodiment, the horizontal sheet portion and the vertical sleeve portion are integrally formed.

[0013] In one embodiment, a coating is provided on the surface of the first vertical rod or the second vertical rod.

[0014] In one embodiment, the first vertical rod or the second vertical rod is a galvanized water-gas pipe with a diameter of 42.25 mm.

[0015] In one embodiment, the protective device further includes a cylindrical buffer pad, which is assembled between the first horizontal sleeve and the horizontal round steel.

[0016] Compared with the prior art, the protective device for a manhole cover in the embodiment of the present application has the following beneficial effects:

[0017] The protective device of the embodiment of the present application, the primary and secondary support legs form a stable support, which can provide stronger supporting force compared to a single support. At the same time, since the first horizontal sleeve and the second horizontal sleeve are combined with the horizontal round steel, the two support legs can be brought close to each other after disassembly to achieve storage, and since any support leg can be rotated compared to the horizontal round steel after being brought close together, the storage volume is further reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the assembly of a protective device and a manhole cover exemplarily shown in an embodiment of the present application.

[0019] Figure 2 It is a schematic diagram of storage of a protective device exemplarily shown in an embodiment of the present application.

[0020] Figure 3 It is a schematic diagram of the structure of a protective device exemplarily shown in an embodiment of the present application.

[0021] Figure 4 It is a schematic structural diagram of a secondary supporting leg exemplarily shown in an embodiment of the present application.

[0022] Figure 5 It is a schematic diagram of the structure of a main supporting leg exemplarily shown in an embodiment of the present application.

[0023] Figure 6 It is a partially enlarged schematic diagram of the viewing angle C exemplarily shown in the embodiment of the present application.

[0024] Figure 7 It is a partially enlarged schematic diagram of the viewing angle D or F exemplarily shown in the embodiment of the present application.

[0025] Figure 8 It is a partially enlarged schematic diagram of the viewing angle E exemplarily shown in the embodiment of the present application.

[0026] Fig. 9 It is a top view of the first lower supporting plate or the second lower supporting plate exemplarily shown in the embodiment of the present application.

[0027] Fig.10 It is a schematic diagram of perspective A of the protective ring exemplarily shown in an embodiment of the present application.

[0028] Fig.11 It is a schematic diagram of the perspective B of the protective ring exemplarily shown in the embodiment of the present application.

[0029] Reference numerals:

[0030] 1. Protective device, 2. Manhole cover, 11. Main supporting leg, 111. First vertical rod, 112. First horizontal sleeve, 113. First upper plate, 114. First lower plate, 1141. First opening, 1142. Second opening, 12. Secondary supporting leg, 121. Second vertical rod, 122. Second horizontal sleeve, 123. Ring, 124. Second upper plate, 125. Second lower plate, 13. Horizontal round steel, 14. Protective ring, 141. Horizontal sheet portion, 1411. Third opening, 1412. Fourth opening, 142. Vertical sleeve portion, 21. Seat ring, 211. Stud. DETAILED DESCRIPTION

[0031] The specific implementation methods of the present application are further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present application but are not intended to limit the scope of the present application.

[0032] In the description of the present application, it should be understood that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are intended to distinguish similar objects and are not used to describe a specific order or sequence. It should be understood that such terms are interchangeable where appropriate so that the embodiments of the present application can be implemented in a marking manner other than illustrated or described. In addition, "including", "having" and any variation thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device comprising a series of components, steps or units is not necessarily limited to those components, steps or units explicitly listed, and may also include other components, steps or units that are not explicitly listed but are inherent to these processes, methods, products or devices.

[0033] In the present application, "primary" and "secondary" are merely numbers used to distinguish components and are not used to limit the substantial structure of the present application. The specific structure shall be subject to the content of the scheme.

[0034] Various types of manhole covers arranged on the ship's cabin wall panels must meet the requirements of both personnel access convenience and cabin sealing performance. Among them, the flat manhole cover is installed on a horizontal platform, and the opening area formed after opening poses a safety hazard, so protective measures must be configured.

[0035] The existing protective structure adopts a single-sided support and a main body welding fixation method, which has two defects: first, the single-sided support leads to insufficient structural stability and is prone to shaking; second, the rigid connection design makes the protective device occupy a large space after disassembly, which is contrary to the compact space layout characteristics of the ship. Therefore, it is necessary to develop a new protective solution that is both stable in use and convenient to store.

[0036] Among the existing solutions, there is no solution that can take into account both reliability and storage portability.

[0037] For this reason, Figure 1 As shown, a protective device 1 of a manhole cover 2 is a preferred embodiment of the present application, and a plurality of studs 211 are arranged on the seat ring 21 of the manhole cover 2. The protective device 1 includes: a main supporting leg 11, a secondary supporting leg 12 and a horizontal round steel 13.

[0038] The main supporting leg 11 includes a first vertical rod 111 and a first horizontal sleeve 112 . The first horizontal sleeve 112 is fixed above the first vertical rod 111 . When in working state, the lower end of the first vertical rod 111 is threadedly connected to the stud 211 .

[0039] The secondary supporting leg 12 includes a second vertical rod 121 and a second horizontal sleeve 122 . The first horizontal sleeve 112 is fixed above the second vertical rod 121 . In the working state, the lower end of the second vertical rod 121 is threadedly connected to the stud 211 .

[0040] The horizontal round steel 13 passes through the first horizontal sleeve 112 and the second horizontal sleeve 122, and the first horizontal sleeve 112 and the second horizontal sleeve 122 are evenly arranged on the horizontal round steel 13. In the storage state, the first vertical rod 111 and the second vertical rod 121 are separated from the stud 211 respectively, and the sliding secondary support leg 12 is close to the main support leg 11.

[0041] The main support leg 11 and the secondary support leg 12 adopt a symmetrical double support structure design, which is fixed to the studs 211 through two sets of vertical rods to form a stable triangular support system. Compared with the traditional single-sided support method, the "shaking head" phenomenon is effectively eliminated, so that the protective device 1 can withstand greater lateral force when in use, which is particularly suitable for safety protection needs in a ship shaking environment.

[0042] At the same time, the main support leg 11 and the secondary support leg 12 can be quickly disassembled and slid together along the horizontal round steel 13. In the storage state, each component can be folded and stored, and since any support leg can be rotated relative to the horizontal round steel 13 after being brought together, the storage volume is further reduced.

[0043] Moreover, the slidable structure, the matching design of the horizontal round steel 13 and the double horizontal sleeves allow the protective device 1 to be properly adjusted in position according to the size of the manhole opening in the working state. By increasing or decreasing the length of the horizontal round steel 13 or adjusting the sleeve spacing, manhole covers 2 of various specifications can be flexibly adapted, thereby enhancing the versatility and engineering adaptability of the device.

[0044] Using standardized stud 211 interface and universal horizontal round steel 13, all components can be replaced or reused separately. Compared with welded structures, there is no need to replace the entire structure during maintenance, which significantly reduces maintenance costs.

[0045] Preferably, in one embodiment of the present application, the second horizontal sleeve 122 can be replaced by a collar 123 , and the diameter of the collar 123 is greater than the diameter of the horizontal round steel 13 .

[0046] Since only the first horizontal sleeve 112 is needed to realize the horizontal fixation of the main support leg 11 to the horizontal round steel, the second horizontal sleeve 122 can be replaced by the collar 123, and the secondary support leg 12 can still play a vertical supporting role. The collar 123 has a larger diameter and a smaller width, so it is more flexible to move along the horizontal round steel 13, so the friction force to be overcome when folding and gathering is smaller, and it is more convenient and quick to fold.

[0047] At the same time, the ring 123 has a larger diameter, which also allows the horizontal round steel 13 to have a certain amount of room to move in the ring 123. When the bolts of the manhole cover 2 are slightly deformed, causing the installation hole distance to become larger or smaller, the presence of the ring 123 allows the distance between the main support leg 11 and the secondary support leg 12 to be properly adjusted, thereby eliminating the error caused by the bolt deformation.

[0048] Furthermore, since the material of the collar 123 is less than that of the horizontal sleeve, the solution of one horizontal sleeve and one collar 123 saves material cost more than the solution of two sleeves, and also reduces the total weight of the protective device 1.

[0049] In one embodiment, the lengths of the main supporting legs 11 and the secondary supporting legs 12 are both smaller than the diameter of the horizontal round steel 13 . When folded, the main supporting legs 11 and the secondary supporting legs 12 can be rotated into the horizontal round steel 13 .

[0050] When the length of the main support leg 11 and the secondary support leg 12 is less than the diameter of the horizontal round steel 13 and can be rotated into the horizontal round steel 13, the main support leg 11 and the secondary support leg 12 can be folded into the horizontal round steel 13, so that the protective device 1 can form a relatively flat plane in the storage state. This not only avoids the risk of collision caused by protruding parts, but also allows it to better fit the flat surface of the cabin for storage, such as against the cabin wall panel, deck corners, etc., further improving the utilization efficiency of the storage space, while also reducing the interference of the irregular storage shape on the storage of other items.

[0051] Based on this, in order to further optimize the structure and reduce the weight of the device, in one embodiment of the present application, the first vertical rod 111 or the second vertical rod 121 can be a hollow tube.

[0052] The main support leg 11 may further include a first upper bearing plate 113 and a first lower bearing plate 114, wherein the first upper bearing plate 113 is fixed above the first vertical rod 111, the first horizontal sleeve 112 is fixed on the first upper bearing plate 113, the first lower bearing plate 114 is fixed at the lower end of the first vertical rod 111, and the first vertical rod 111 is threadedly connected to the stud 211 via the first lower bearing plate 114. The secondary support leg 12 also includes a second upper bearing plate 124 and a second lower bearing plate 125, wherein the second upper bearing plate 124 is fixed above the second vertical rod 121, the collar 123 is fixed on the second upper bearing plate 124, the second lower bearing plate 125 is fixed at the lower end of the second vertical rod 121, and the second vertical rod 121 is threadedly connected to the stud 211 via the second lower bearing plate 125.

[0053] Although hollow tubes are used as vertical rods, due to the addition of upper supporting plates, lower supporting plates and other structures, the first horizontal sleeve 112, the ring 123 and other structures can still be firmly connected to their respective vertical rods, and the first vertical rod 111 and the second vertical rod 121 can also be firmly connected to their respective corresponding studs 211.

[0054] Since the hollow tube is lighter and still has good structural strength, it can greatly reduce the weight of the overall protection device 1 while meeting the protection requirements, further reducing the storage burden.

[0055] The specific sizes of the first upper deck 113 , the first lower deck 114 , the second upper deck 124 , and the second lower deck 125 may be determined according to actual needs.

[0056] On this basis, in another embodiment, the first lower bearing plate 114 and the second lower bearing plate 125 may include a first opening 1141 and a second opening 1142. The protective device 1 may further include a protective ring 14, the protective ring 14 includes a horizontal sheet portion 141 and a vertical sleeve portion 142, the horizontal sheet portion 141 includes a third opening 1411 and a fourth opening 1412, the vertical sleeve portion 142 extends downward from the third opening 1411, and the protective ring 14 is connected to the first lower bearing plate 114 or the second lower bearing plate 125 through the fourth opening 1412.

[0057] Among them, the third opening 1411 is coaxial with the first opening 1141, the fourth opening 1412 is coaxial with the second opening 1142, the diameter of the first opening 1141 is larger than the outer diameter of the vertical sleeve portion 142, the inner diameter of the vertical sleeve portion 142 is larger than the diameter of the stud 211, and the vertical sleeve portion 142 is assembled between the stud 211 and the first opening 1141.

[0058] In the present application, when the manhole cover 2 does not need to be opened, the stud 211 still needs to be assembled with the cover plate of the manhole cover 2. If the protective device 1 and the stud 211 are subjected to impact forces in different directions after being assembled, the threads of the stud 211 of the manhole cover 2 are easily damaged.

[0059] Through the above scheme, the present application opens a first opening 1141 and a second opening 1142 on the first lower supporting plate 114 or the second lower supporting plate 125. The two openings are respectively used to fix the protective ring 14 and the stud 211 of the seat ring 21 connected to the manhole cover 2. At the same time, since the first opening 1141 is coaxial with the third opening 1411, and the protective ring 14 has a vertical sleeve portion 142 extending downward. Therefore, when the protective ring 14 is assembled to the first lower supporting plate 114 or the second lower supporting plate 125, the vertical sleeve portion 142 with a diameter between the stud 211 and the first opening 1141 can be assembled between the stud 211 and the first opening 1141. At this time, if the stud 211 is threadedly assembled, the thread will not be damaged, and the thread of the stud 211 can be protected.

[0060] In addition, the horizontal sheet portion 141 of the protection ring 14 can also protect the surface of the first lower supporting plate 114 or the second lower supporting plate 125, reduce the wear of the first lower supporting plate 114 or the second lower supporting plate 125, and increase the service life of the protection device 1.

[0061] Furthermore, the protection ring 14 can be made of elastic material, such as rubber, silicone, thermoplastic elastomer, polyurethane elastomer, etc.

[0062] In the complex operating environment of the ship, the protective device 1 is susceptible to impact. The protective ring 14 made of elastic material can absorb and disperse energy by its own elastic deformation when an impact occurs. For example, when the ship is sailing and encounters wind and waves, when the protective device 1 is subjected to force, the protective ring 14 can effectively buffer and greatly reduce the impact force transmitted to the stud 211, preventing the thread from being damaged by the impact, and further extending the service life of the stud 211.

[0063] Secondly, the elastic protection ring 14 can effectively block the transmission of vibration and reduce the friction noise between the protection device 1 and the stud 211 and the lower bearing plate.

[0064] In any embodiment, the horizontal sheet portion 141 and the vertical sleeve portion 142 of the protective ring 14 can be integrally formed. Ship cabins are often in a humid environment, and some areas may even be exposed to seawater, so waterproof sealing is very important. The integrally formed protective ring 14 has no joint gaps, which can effectively prevent moisture from penetrating into the stud 211 through the gaps, preventing the stud 211 from corroding and rusting due to moisture, thereby ensuring the mechanical properties and service life of the stud 211.

[0065] At the same time, in the rocking environment of a ship, the integrated components can reduce the probability of component loss and increase the service life of the protective device 1.

[0066] In one embodiment, the surface of the first vertical rod 111 or the second vertical rod 121 is provided with a coating. In a ship environment, the coating on the surface of the first or second vertical rod 121 plays an important role. Seawater contains a variety of corrosive substances. For example, the zinc coating can block seawater, protect the rods by zinc preferential reaction, slow down corrosion, and maintain structural integrity. The humidity in the cabin is high, and the nickel coating can prevent moisture from electrochemically reacting with the rods, reduce rust, and ensure the performance of the device. In addition, there may be corrosive chemicals in the cabin, and the chrome coating is acid and alkali resistant and can resist erosion, ensuring that the protective device 1 can operate reliably in a complex chemical environment and ensuring the safety of ship operations.

[0067] In another embodiment of the present application, the first vertical rod 111 or the second vertical rod 121 is a galvanized water-gas pipe with a diameter of 42.25 mm.

[0068] The water-gas pipe itself has a moderate wall thickness and good strength, which can provide reliable support for the protective device 1, ensuring that it will not be easily deformed or broken due to force during use, thereby maintaining the stability of the protective structure.

[0069] As a common pipe material, it has sufficient market supply, wide procurement channels, is easy to obtain and has a relatively low cost, which is conducive to reducing the production cost of the entire protective device 1 and improving economic benefits.

[0070] In one embodiment, the protection device 1 further includes a cylindrical buffer pad, which is assembled between the first horizontal sleeve 112 and the horizontal round steel 13 .

[0071] Compared with the prior art, the protective device 1 of the manhole cover 2 in the embodiment of the present application has the following beneficial effects:

[0072] The protective device 1 of the embodiment of the present application has two primary and secondary support legs that form a stable support, which can provide stronger supporting force compared to a single support. At the same time, since the first horizontal sleeve 112 and the second horizontal sleeve 122 are combined with the horizontal round steel 13, the two support legs can be brought close to each other after disassembly to achieve storage, and since any support leg can be rotated compared to the horizontal round steel 13 after being brought close together, the storage volume is further reduced.

[0073] From the perspective of the supporting structure, the main supporting legs 11 and the secondary supporting legs 12 are symmetrically designed and their length is smaller than the diameter of the horizontal round steel 13. They can be rotated into the round steel, which not only realizes two-way stable support, but also efficiently utilizes the storage space. When stored, they can form a flat surface, which is convenient for space planning and management in the cabin.

[0074] In terms of protective components, the design of the protective ring 14 is outstanding. Its horizontal sheet portion 141 and the vertical sleeve portion 142 are integrally formed to enhance structural strength and waterproof sealing, optimize the production process and reduce weight; it is made of elastic materials such as rubber, silicone, etc., which can buffer and absorb energy to protect the stud 211, adaptively adjust to improve adaptability, reduce noise and shock to optimize the cabin environment, and facilitate installation and disassembly. The protective ring 14 is assembled on the first or second lower support plate 125 through a specific opening design to effectively protect the thread of the stud 211.

[0075] In addition, the surface of the vertical rod is coated to resist corrosion from seawater, moisture and chemicals; galvanized water-gas pipes are used as vertical rods, which have good strength, low cost and corrosion resistance. The cylindrical buffer pad is assembled between the first horizontal sleeve 112 and the horizontal round steel 13, which plays the role of buffering and shock absorption, reducing noise and enhancing stability, and comprehensively improving the performance of the protective device 1.

[0076] The above is only a preferred implementation of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present application. These improvements and substitutions should also be regarded as the scope of protection of the present application.

Claims

1. A protective device for a manhole cover, wherein a plurality of studs (211) are arranged on a seat ring (21) of the manhole cover (2), characterized in that: The protective device (1) comprises: A main supporting leg (11), the main supporting leg (11) comprising a first vertical rod (111) and a first horizontal sleeve (112), the first horizontal sleeve (112) being fixed above the first vertical rod (111), and the lower end of the first vertical rod (111) being threadedly connected to the stud (211) in a working state; A secondary supporting leg (12), the secondary supporting leg (12) comprising a second vertical rod (121) and a second horizontal sleeve (122), the first horizontal sleeve (112) being fixed above the second vertical rod (121), and the lower end of the second vertical rod (121) being threadedly connected to the stud (211) in a working state; A horizontal round steel (13), wherein the horizontal round steel (13) passes through the first horizontal sleeve (112) and the second horizontal sleeve (122), wherein the first horizontal sleeve (112) and the second horizontal sleeve (122) are evenly arranged on the horizontal round steel (13), and when in the storage state, the first vertical rod (111) and the second vertical rod (121) are respectively separated from the stud (211), and the secondary supporting leg (12) is slid closer to the main supporting leg (11).

2. The protective device according to claim 1, characterized in that: The second horizontal sleeve (122) is replaced by a collar (123), wherein the diameter of the collar (123) is greater than the diameter of the horizontal round steel (13).

3. The protective device according to claim 2, characterized in that: The lengths of the main supporting legs (11) and the secondary supporting legs (12) are both smaller than the diameter of the horizontal round steel (13), so that the main supporting legs (11) and the secondary supporting legs (12) can be rotated into the horizontal round steel (13).

4. The protection device according to claim 2, characterized in that: The first vertical rod (111) or the second vertical rod (121) is a hollow tube; The main supporting leg (11) further comprises a first upper bearing plate (113) and a first lower bearing plate (114), wherein the first upper bearing plate (113) is fixed above the first vertical rod (111), the first horizontal sleeve (112) is fixed on the first upper bearing plate (113), the first lower bearing plate (114) is fixed on the lower end of the first vertical rod (111), and the first vertical rod (111) is threadedly connected to the stud (211) via the first lower bearing plate (114); The secondary supporting leg (12) further comprises a second upper supporting plate (124) and a second lower supporting plate (125); the second upper supporting plate (124) is fixed above the second vertical rod (121); the collar (123) is fixed on the second upper supporting plate (124); the second lower supporting plate (125) is fixed on the lower end of the second vertical rod (121); the second vertical rod (121) is threadedly connected to the stud (211) via the second lower supporting plate (125).

5. The protection device according to claim 4, characterized in that: The first lower bearing plate (114) and the second lower bearing plate (125) both include a first opening (1141) and a second opening (1142); The protective device (1) further comprises a protective ring (14), the protective ring (14) comprising a horizontal sheet portion (141) and a vertical sleeve portion (142), the horizontal sheet portion (141) comprising a third opening (1411) and a fourth opening (1412), the vertical sleeve portion (142) extending downward from the third opening (1411), and the protective ring (14) being connected to the first lower bearing plate (114) or the second lower bearing plate (125) via the fourth opening (1412); The third opening (1411) is coaxial with the first opening (1141), the fourth opening (1412) is coaxial with the second opening (1142), the diameter of the first opening (1141) is larger than the outer diameter of the vertical sleeve portion (142), the inner diameter of the vertical sleeve portion (142) is larger than the diameter of the stud (211), and the vertical sleeve portion (142) is assembled between the stud (211) and the first opening (1141).

6. The protection device according to claim 5, characterized in that: The protection ring (14) is made of elastic material.

7. The protection device according to claim 5, characterized in that: The horizontal sheet portion (141) and the vertical sleeve portion (142) are integrally formed.

8. The protection device according to claim 1, characterized in that: A coating is provided on the surface of the first vertical rod (111) or the second vertical rod (121).

9. The protection device according to claim 4, characterized in that: The first vertical rod (111) or the second vertical rod (121) is a galvanized water-gas pipe with a diameter of 42.25 mm.

10. The protection device according to claim 1, characterized in that: The protective device (1) further comprises a cylindrical buffer pad, which is assembled between the first horizontal sleeve (112) and the horizontal round steel (13).

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