A protection device for a manhole cover

Abstract

The application relates to a deck structure of a ship, and discloses a protection device for a manhole cover, wherein a plurality of studs are arranged on a seat ring of the manhole cover, and the protection device comprises a main supporting leg, a secondary supporting leg and a horizontal round steel. The main supporting leg comprises a first vertical rod and a first horizontal sleeve pipe, the first horizontal sleeve pipe is fixed above the first vertical rod, and the lower end of the first vertical rod is threadedly connected with the stud in a working state. The secondary supporting leg comprises a second vertical rod and a second horizontal sleeve pipe, the first horizontal sleeve pipe is fixed above the second vertical rod, and the lower end of the second vertical rod is threadedly connected with the stud in a working state. The horizontal round steel passes through the first horizontal sleeve pipe and the second horizontal sleeve pipe, the first horizontal sleeve pipe and the second horizontal sleeve pipe are uniformly arranged on the horizontal round steel, the first vertical rod and the second vertical rod are separated from the stud in a storage state, and the secondary supporting leg is slid to approach the main supporting leg. The main and secondary supporting legs form stable support, and the two supporting legs can approach each other to realize storage.

Description

TECHNICAL FIELD

[0001] The present application relates to a deck structure of a ship, in particular to a protection device of a manhole cover. BACKGROUND

[0002] At present, various manhole covers are arranged on the cabin wall of a ship to meet the use demand and the sealing requirement. The horizontally arranged manhole cover is installed on a horizontal platform, and a protection device must be arranged around the manhole opening in the open state. The channel provided by the manhole cover is convenient for personnel to enter and exit, but the large opening formed after the manhole cover is opened will pose a serious threat to the safety of personnel if the protection device is absent.

[0003] In the existing protection device, the main body is directly fixed on the manhole cover through one-way support, which is arranged on one side and is not stable enough, and the situation of "shaking head" is prone to occur. Moreover, the main body and the support are directly welded and fixed, which occupies a large space after being removed.

[0004] Therefore, a scheme capable of stably supporting in use and reducing the space occupation in storage is needed. SUMMARY

[0005] The technical problem to be solved by the present application is how to improve the stability of the protection device and reduce the space occupation in storage.

[0006] In order to solve the above technical problem, the present application provides a protection device of a manhole cover, wherein a plurality of studs are arranged on a seat ring of the manhole cover, and the protection device comprises: a main support leg, the main support leg comprises a first vertical rod and a first horizontal sleeve, the first horizontal sleeve is fixed above the first vertical rod, and in a working state, the lower end of the first vertical rod is threadedly connected with the stud; a secondary support leg, the secondary support leg comprises a second vertical rod and a second horizontal sleeve, the first horizontal sleeve is fixed above the second vertical rod, and in the working state, the lower end of the second vertical rod is threadedly connected with the stud; and a horizontal round steel, the horizontal round steel passes through the first horizontal sleeve and the second horizontal sleeve, the first horizontal sleeve and the second horizontal sleeve are uniformly arranged on the horizontal round steel, in a storage state, the first vertical rod and the second vertical rod are separated from the stud, and the secondary support leg is slid to approach the main support leg.

[0007] In an embodiment, the second horizontal sleeve is replaced by a sleeve ring, and the diameter of the sleeve ring is greater than the diameter of the horizontal round steel.

[0008] In an embodiment, the length of the main support leg and the secondary support leg is less than the diameter of the horizontal round steel, so that the main support leg and the secondary support leg are rotated into the horizontal round steel.

[0009] In an embodiment, the first vertical rod or the second vertical rod is a hollow pipe; the main support leg further comprises a first upper support plate and a first lower support plate, the first upper support plate is fixed above the first vertical rod, the first horizontal sleeve is fixed on the first upper support plate, the first lower support plate is fixed at the lower end of the first vertical rod, and the first vertical rod is threadedly connected with the stud through the first lower support plate; the secondary support leg further comprises a second upper support plate and a second lower support plate, the second upper support plate is fixed above the second vertical rod, the collar is fixed on the second upper support plate, the second lower support plate is fixed at the lower end of the second vertical rod, and the second vertical rod is threadedly connected with the stud through the second lower support plate.

[0010] In an embodiment, the first lower support plate and the second lower support plate each comprise a first opening and a second opening; the protection device further comprises a protection ring, the protection ring comprises a horizontal sheet portion and a vertical sleeve portion, the horizontal sheet portion comprises a third opening and a fourth opening, the vertical sleeve portion extends downward from the third opening, and the protection ring is connected with the first lower support plate or the second lower support 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 greater than the outer diameter of the vertical sleeve portion, the inner diameter of the vertical sleeve portion is greater than the diameter of the stud, and the vertical sleeve portion is assembled between the stud and the first opening.

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

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

[0013] In an embodiment, the surface of the first vertical rod or the second vertical rod is provided with a plating layer.

[0014] In an 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 an embodiment, the protection device further comprises a cylindrical buffer pad, and the cylindrical buffer pad is assembled between the first horizontal sleeve and the horizontal round steel.

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

[0017] The protection device in the embodiment of the present application forms stable support through the main support leg and the secondary support leg, and can provide stronger support force compared with single support. In addition, the first horizontal sleeve and the second horizontal sleeve are combined with the horizontal round steel, so that the two support legs can be moved close to each other after being disassembled, thereby achieving storage. In addition, any support leg can rotate compared with the horizontal round steel after being moved close, so that the storage volume is further reduced. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is an assembly schematic view of a protection device and a manhole cover according to an embodiment of the present application.

[0019] Figure 2 is a schematic view of a protective device according to an embodiment of the present application.

[0020] Figure 3 is a schematic view of a protective device according to an embodiment of the present application.

[0021] Figure 4 is a schematic view of a secondary support leg according to an embodiment of the present application.

[0022] Figure 5 is a schematic view of a primary support leg according to an embodiment of the present application.

[0023] Figure 6 is a schematic view of a partial enlarged view of view C according to an embodiment of the present application.

[0024] Figure 7 is a schematic view of a partial enlarged view of view D or F according to an embodiment of the present application.

[0025] Figure 8 is a schematic view of a partial enlarged view of view E according to an embodiment of the present application.

[0026] Figure 9 is a schematic view of a top view of a first lower support plate or a second lower support plate according to an embodiment of the present application.

[0027] Figure 10 is a schematic view of view A of a protective ring according to an embodiment of the present application.

[0028] Figure 11 is a schematic view of view B of a protective ring according to an embodiment of the present application.

[0029] Reference signs:

[0030] 1, protective device, 2, manhole cover, 11, primary support leg, 111, first vertical rod, 112, first horizontal sleeve, 113, first upper support plate, 114, first lower support plate, 1141, first opening, 1142, second opening, 12, secondary support leg, 121, second vertical rod, 122, second horizontal sleeve, 123, collar, 124, second upper support plate, 125, second lower support plate, 13, horizontal round steel, 14, protective ring, 141, horizontal sheet part, 1411, third opening, 1412, fourth opening, 142, vertical sleeve part, 21, seat ring, 211, stud. DETAILED DESCRIPTION

[0031] The specific embodiments of the present application will be further described in conjunction with the 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 this application, it should be understood that the terms "first," "second," etc., in the specification, claims, and accompanying 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 embodiments of this application can be implemented using notation methods other than those shown or described. Furthermore, "comprising," "having," and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that comprises a series of components, steps, or units is not necessarily limited to those components, steps, or units explicitly listed, but may also include other components, steps, or units not explicitly listed but inherent to these processes, methods, products, or devices.

[0033] In this application, "primary" and "secondary" are merely labels used to distinguish components and are not intended to limit the actual structure of this application. The specific structure is subject to the content of the solution.

[0034] All manhole covers installed on the bulkheads of ship cabins must simultaneously meet the requirements of convenient personnel access and cabin sealing performance. Among them, horizontal manhole covers installed on horizontal platforms pose a safety hazard when opened, and protective measures must be provided.

[0035] The existing protective structure uses a single-sided support and welding method to fix it to the main body, which has two drawbacks: first, the single-sided support leads to insufficient structural stability and is prone to swaying; second, the rigid connection design means that the protective device occupies a large space after disassembly, which contradicts the compact spatial layout of ships. Therefore, it is necessary to develop a new protective solution that combines stability in use with ease of storage.

[0036] Among the existing solutions, none can simultaneously achieve both sturdiness and portability in storage.

[0037] Therefore, such as Figure 1 As shown in the preferred embodiment of this application, a protective device 1 for a manhole cover 2 is provided. The manhole cover 2 has a plurality of studs 211 arranged on its seat ring 21. The protective device 1 includes a main support leg 11, a secondary support leg 12, and a horizontal round steel bar 13.

[0038] The main support 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. In the working state, the lower end of the first vertical rod 111 is threadedly connected to the stud 211.

[0039] The secondary support 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, which are uniformly arranged on the horizontal round steel 13, and the first vertical rod 111 and the second vertical rod 121 are separated from the stud 211 in the storage state, 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, and are fixed with the stud 211 through two groups of vertical rods, forming a stable triangular support system. Compared with the traditional single-side support mode, the "head shaking" phenomenon is effectively eliminated, so that the protective device 1 can bear greater lateral force when in use, and is particularly suitable for safety protection requirements in a ship rocking environment.

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

[0043] Moreover, this slidable structure, the cooperation design of the horizontal round steel 13 and the double horizontal sleeves, allows the protective device 1 to adjust the position appropriately 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, the device can be flexibly adapted to manhole covers 2 of various specifications, enhancing the versatility and engineering adaptability of the device.

[0044] Standardized stud 211 interfaces and universal horizontal round steel 13 are adopted, and all components can be replaced or reused individually. Compared with a welded structure, the entire device does not need to be replaced during maintenance, significantly reducing maintenance costs.

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

[0046] Since only the first horizontal sleeve 112 can achieve the horizontal fixation of the main support leg 11 to the horizontal round steel, the second horizontal sleeve 122 can be replaced by a sleeve ring 123, and the secondary support leg 12 can still play a vertical supporting role. The sleeve ring 123 has a larger diameter and a smaller width, so it is more flexible along the horizontal round steel 13, and thus the friction force to be overcome during storage and gathering is smaller, making storage more convenient and fast.

[0047] At the same time, the sleeve ring 123 has a larger diameter, which also allows the horizontal round steel 13 to have a certain space for movement in the sleeve ring 123. When the bolts of the manhole cover 2 are slightly deformed to cause the mounting hole distance to be larger or smaller, the presence of the sleeve ring 123 allows the spacing between the main support leg 11 and the secondary support leg 12 to be adjusted appropriately, so that the error caused by the deformation of the bolts can be eliminated.

[0048] And since the material of the sleeve ring 123 is less than that of the horizontal sleeve, the scheme of one horizontal sleeve and one sleeve ring 123 is more cost-effective than the scheme of two sleeves, while also reducing the total weight of the protection device 1.

[0049] In an embodiment, the lengths of the main support leg 11 and the secondary support leg 12 are both less than the diameter of the horizontal round steel 13, so that when stored, the main support leg 11 and the secondary support leg 12 can be rotated into the horizontal round steel 13.

[0050] When the lengths of the main support leg 11 and the secondary support leg 12 are 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 protection 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 being able to be attached to the cabin wall panel, deck corner, etc., further improving the utilization efficiency of the storage space, while also reducing the interference of irregular storage shape on the storage of other items.

[0051] Therefore, in order to further optimize the structure and reduce the weight of the device, in an embodiment of the present application, the first vertical rod 111 or the second vertical rod 121 can be a hollow pipe.

[0052] The main support leg 11 can further include a first upper support plate 113 and a first lower support plate 114, the first upper support plate 113 being fixed above the first vertical rod 111, the first horizontal sleeve 112 being fixed on the first upper support plate 113, the first lower support plate 114 being fixed at the lower end of the first vertical rod 111, and the first vertical rod 111 being threadedly connected with the stud 211 through the first lower support plate 114. The secondary support leg 12 further includes a second upper support plate 124 and a second lower support plate 125, the second upper support plate 124 being fixed above the second vertical rod 121, the sleeve ring 123 being fixed on the second upper support plate 124, the second lower support plate 125 being fixed at the lower end of the second vertical rod 121, and the second vertical rod 121 being threadedly connected with the stud 211 through the second lower support plate 125.

[0053] Although the hollow tube is used as the vertical rod, the first horizontal sleeve 112 and the sleeve ring 123 can be stably connected with the vertical rod, and the first vertical rod 111 and the second vertical rod 121 can be stably connected with the corresponding stud 211, due to the upper bearing plate and the lower bearing plate.

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

[0055] The specific size of the first upper bearing plate 113, the first lower bearing plate 114, the second upper bearing plate 124 and the second lower bearing plate 125 can be determined according to actual requirements.

[0056] On this basis, in another embodiment, the first lower bearing plate 114 and the second lower bearing plate 125 can each include a first opening 1141 and a second opening 1142. The protection device 1 can further include a protection ring 14, which 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. The protection ring 14 is connected to the first lower bearing plate 114 or the second lower bearing plate 125 through the fourth opening 1412.

[0057] The third opening 1411 is coaxial with the first opening 1141, and the fourth opening 1412 is coaxial with the second opening 1142. The diameter of the first opening 1141 is greater than the outer diameter of the vertical sleeve portion 142. The inner diameter of the vertical sleeve portion 142 is greater than the diameter of the stud 211. The vertical sleeve portion 142 is fitted 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 also needs to be fitted with the cover plate of the manhole cover 2. If the protection device 1 is fitted with the stud 211 and is subjected to impact forces in different directions, the threads of the stud 211 of the manhole cover 2 can be easily damaged.

[0059] According to the above scheme, the first lower bearing plate 114 or the second lower bearing plate 125 is provided with a first opening 1141 and a second opening 1142. The two openings are respectively used for fixing the protection ring 14 and the stud 211 of the seat ring 21 connected to the manhole cover 2. Since the first opening 1141 is coaxial with the third opening 1411, and the protection ring 14 has a downward extending vertical sleeve part 142, when the protection ring 14 is assembled on the first lower bearing plate 114 or the second lower bearing plate 125, the vertical sleeve part 142 with a diameter between the stud 211 and the first opening 1141 can be exactly assembled between the stud 211 and the first opening 1141. At this time, the stud 211 is screwed, and the thread is not damaged, which can protect the thread of the stud 211.

[0060] In addition, the horizontal sheet part 141 of the protection ring 14 can also protect the surface of the first lower bearing plate 114 or the second lower bearing plate 125, reduce the wear of the first lower bearing plate 114 or the second lower bearing plate 125, and improve 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 running environment of the ship, the protection device 1 is easy to be impacted. The protection ring 14 made of elastic material can absorb and disperse energy by deforming elastically when impact occurs. For example, when the protection device 1 is stressed due to the ship sailing in waves, the protection ring 14 can effectively buffer and greatly reduce the impact force transmitted to the stud 211, preventing the thread from being damaged by impact, and further prolonging 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, the stud 211 and the lower bearing plate.

[0064] In any embodiment, the horizontal sheet part 141 and the vertical sleeve part 142 of the protection ring 14 can be integrally formed. The ship cabin is often in a humid environment, and even some areas are in contact with seawater, so waterproof sealing is very important. The integrally formed protection ring 14 has no joint gap, which can effectively prevent water from penetrating into the stud 211 part from the joint gap, avoid the stud 211 from being corroded and rusted due to moisture, and ensure the mechanical properties and service life of the stud 211.

[0065] At the same time, in the shaking environment of the ship, the integral part can reduce the probability of losing parts and improve the service life of the protection device 1.

[0066] In an embodiment, the surface of the first vertical rod 111 or the second vertical rod 121 is provided with a plating layer. In a ship environment, the surface of the first or second vertical rod 121 is provided with a plating layer, which is of great significance. Seawater contains a variety of corrosive substances, such as a zinc plating layer that can block seawater, rely on zinc to react preferentially to protect the rod, slow down corrosion, and maintain structural integrity. The humidity in the cabin is high, and a nickel plating layer can prevent moisture from reacting electrochemically with the rod, reducing rust and ensuring device performance. And the cabin may have corrosive chemicals, and the chromium plating layer is resistant to acid and alkali, and can resist erosion to ensure that the protection device 1 can operate reliably in a complex chemical environment and ensure 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 zinc-plated 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 force for the protection device 1 to ensure that it will not easily deform or break during use, maintaining the stability of the protection structure.

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

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

[0071] Compared with the prior art, the protection device 1 of the manhole cover 2 according to an embodiment of the present application has the beneficial effects that:

[0072] The protection device 1 according to an embodiment of the present application forms stable support with the primary and secondary support legs, which can provide stronger support force compared to 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, after being disassembled, the two support legs can be brought together to achieve storage. Since any support leg can rotate relative to the horizontal round steel 13 after being brought together, the storage volume is further reduced.

[0073] From the perspective of the support structure, the primary support leg 11 and the secondary support leg 12 are designed symmetrically and have a length less than the diameter of the horizontal round steel 13, and can be rotated into the round steel, which not only realizes bidirectional stable support, but also efficiently utilizes the storage space. When stored, a flat plane can be formed, which is convenient for planning and management of the cabin space.

[0074] In the protection part, the protection ring 14 is designed with highlights. The horizontal sheet part 141 is integrally formed with the vertical sleeve part 142, which enhances the structural strength and waterproof sealing, optimizes the production process, and reduces the weight. The protection ring 14 is made of elastic materials such as rubber and silicone, which can buffer and absorb energy to protect the stud 211, adaptively adjust the lifting compatibility, reduce noise and vibration, optimize the cabin environment, and facilitate installation and removal. The protection ring 14 is assembled on the first or second lower bearing plate 125 through specific hole design, effectively protecting the stud 211 thread.

[0075] In addition, the vertical rod surface is provided with a plating layer, which can resist corrosion of seawater, moisture and chemicals; the galvanized water gas pipe is used as the vertical rod, which has 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 a role in buffering and shock absorption, noise reduction, and stability enhancement, and comprehensively improves the performance of the protection device 1.

[0076] The above is only the preferred embodiment of the present application, and it should be noted that for ordinary skilled persons in the technical field, several improvements and substitutions can be made without departing from the technical principles of the present application, and these improvements and substitutions should be considered as the protection scope of the present application.

Claims

1. A protection device for a manhole cover, a plurality of studs (211) being arranged on a seat ring (21) of the manhole cover (2), characterized in that, The protection device (1) comprises: The main support leg (11) comprises a first upper bearing plate (113), a first lower bearing plate (114), a first vertical rod (111) and a first horizontal sleeve (112), the first horizontal sleeve (112) is fixed above the first vertical rod (111), the lower end of the first vertical rod (111) is threadedly connected with the stud (211) in the working state, 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 with the stud (211) through the first lower bearing plate (114); The secondary support leg (12) comprises a second upper bearing plate (124), a second lower bearing plate (125), a second vertical rod (121) and a second horizontal sleeve (122), the second horizontal sleeve (122) is fixed above the second vertical rod (121), the lower end of the second vertical rod (121) is threadedly connected with the stud (211) in the working state, the first vertical rod (111) or the second vertical rod (121) is a hollow pipe, the second upper bearing plate (124) is fixed above the second vertical rod (121), the second horizontal sleeve (122) is fixed on the second upper bearing plate (124), the second lower bearing plate (125) is fixed on the lower end of the second vertical rod (121), and the second vertical rod (121) is threadedly connected with the stud (211) through the second lower bearing plate (125); the first lower bearing plate (114) and the second lower bearing plate (125) each comprise a first opening (1141) and a second opening (1142); The horizontal round steel (13) passes through the first horizontal sleeve (112) and the second horizontal sleeve (122), the first horizontal sleeve (112) and the second horizontal sleeve (122) are uniformly arranged on the horizontal round steel (13), the length of the main support leg (11) and the length of the secondary support leg (12) are each less than the diameter of 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), the secondary support leg (12) is slid to approach the main support leg (11), and the main support leg (11) and the secondary support leg (12) are rotated into the horizontal round steel (13); The protection ring (14) comprises a horizontal sheet part (141) and a vertical sleeve part (142), the horizontal sheet part (141) comprises a third opening (1411) and a fourth opening (1412), the vertical sleeve part (142) extends downward from the third opening (1411), and the protection ring (14) is connected with the first lower bearing plate (114) or the second lower bearing plate (125) through the fourth opening (1412); wherein 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 greater than the outer diameter of the vertical sleeve part (142), the inner diameter of the vertical sleeve part (142) is greater than the diameter of the stud (211), and the vertical sleeve part (142) is assembled between the stud (211) and the first opening (1141).

2. The guard of claim 1, wherein The second horizontal sleeve (122) is replaced by a sleeve ring (123), and the diameter of the sleeve ring (123) is greater than the diameter of the horizontal round steel (13).

3. The guard of claim 1, wherein, The protection ring (14) is made of elastic material.

4. The guard of claim 1, wherein The horizontal sheet part (141) and the vertical sleeve part (142) are integrally formed.

5. The guard of claim 1, wherein The surface of the first vertical rod (111) or the second vertical rod (121) is provided with a plating layer.

6. The guard of claim 1, wherein The first vertical rod (111) or the second vertical rod (121) is a galvanized water gas pipe with a diameter of 42.25 mm.

7. The guard of claim 1, wherein The protection device (1) further comprises a cylindrical buffer pad assembled between the first horizontal sleeve (112) and the horizontal round steel (13).

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