Hatch cover sealing arrangement

Abstract

The utility model provides a kind of cabin cover sealing structure, it is characterized in that, including from inside to outside the ethylene-propylene-diene rubber core, interlayer, main body layer, protective layer, sheath layer, rubber core is the hollow structure ethylene-propylene-diene rubber core, interlayer is the polytetrafluoroethylene adhesive tape wrapped in the outside of ethylene-propylene-diene rubber core, main body layer is equipped with multiple polypropylene yarn fillers, the protective film is arranged between adjacent polypropylene yarn filler layer, protective film is polytetrafluoroethylene adhesive tape, protective layer is the polytetrafluoroethylene adhesive tape wrapped in the outside of main body layer, the section profile of protective layer is square, one nylon rope is respectively embedded in four apex positions of protective layer, sheath layer is the polytetrafluoroethylene yarn braiding layer wrapped in the outermost side.

Description

Technical Field

[0001] This utility model relates to the field of ship cabin sealing technology, and in particular to a ship cabin cover sealing structure. Background Technology

[0002] Liquid cargo ships are used to transport various chemical substances. Because the media they transport are often toxic, flammable, volatile, or corrosive, the hatch covers, openings, and tank tops of the chemical storage tanks on board must be strictly sealed to prevent leaks into the air, polluting the environment and endangering human health. However, the hatch covers need to be opened and closed frequently for loading and unloading cargo, and the seals must have a certain degree of elasticity and strength to achieve a tight seal between the hatch cover and the tank, and to withstand a certain frequency of opening and closing operations.

[0003] Existing technologies typically use rubber strips to seal between the hatch cover and the tank body. While these strips offer good sealing performance and service life for general cargo, they are not effective at sealing corrosive chemicals. This is because rubber has poor resistance to chemical corrosion and is easily corroded and broken down by chemicals, leading to leaks. Rubber is also prone to aging; after repeated opening and closing of the hatch cover, it loses its elasticity, cracks on the surface, and has a limited service life. Furthermore, rubber has low strength and is easily damaged during the opening and closing of the hatch cover.

[0004] In view of the above, there is a need for a more reliable hatch cover sealing structure to prevent leakage of hazardous chemicals transported by ships, to be resistant to chemical corrosion, and to increase the frequency of use. Utility Model Content

[0005] The conventional hatch cover sealing structure of the prior art is prone to corrosion in chemical media, resulting in poor sealing reliability; it is also prone to aging and has a short service life; and it lacks strength and is susceptible to mechanical damage. The purpose of this utility model is to provide a new hatch cover sealing strip structure to solve the above problems.

[0006] To achieve the above objectives, the present invention adopts the following solution:

[0007] This utility model provides a ship hatch sealing structure, characterized in that it includes, from the inside out, a EPDM rubber core, a partition layer, a main body layer, a protective layer, and a sheath layer. The rubber core is a hollow EPDM rubber core. The partition layer is a polytetrafluoroethylene (PTFE) tape wrapped around the outside of the EPDM rubber core. The main body layer is provided with multiple layers of polypropylene yarn filler. A protective film, which is also a PTFE tape, is provided between adjacent polypropylene yarn filler layers. The protective film is a PTFE tape wrapped around the outside of the main body layer. The protective layer has a square cross-sectional profile. A nylon rope is embedded at each of the four apex positions of the protective layer. The sheath layer is a PTFE yarn braided layer wrapped around the outermost layer.

[0008] Furthermore, the hatch cover sealing structure provided by this utility model may also have the following features: the cross-sectional profile of the rubber core is circular, and a circular hole is provided at the center position.

[0009] Furthermore, the hatch cover sealing structure provided by this utility model may also have the following features: the thickness of the partition layer is 1.2mm to 2.5mm.

[0010] Furthermore, the hatch cover sealing structure provided by this utility model may also have the following features: the cross-sectional profile of the main layer is circular, and three layers of polypropylene yarn filler are provided in the main layer.

[0011] Furthermore, the hatch cover sealing structure provided by this utility model may also have the following feature: the thickness of each layer of polypropylene yarn filler is equal.

[0012] Furthermore, the hatch cover sealing structure provided by this utility model may also have the following features: the thickness of each protective film is 0.4mm to 1.0mm.

[0013] Furthermore, the hatch cover sealing structure provided by this utility model may also have the following feature: the thickness of the protective layer is greater than the thickness of the single-layer polypropylene yarn filler.

[0014] Furthermore, the hatch cover sealing structure provided by this utility model may also have the following features: the thickness of the sheath layer is 0.5mm to 2.0mm.

[0015] The present invention has the following beneficial effects:

[0016] The EPDM rubber core with a circular hole in the hatch cover sealing structure provided by this utility model improves the overall compressibility and resilience of the hatch cover sealing structure. The polypropylene yarn braided layer is chemically resistant, elastic, and durable, thus significantly improving the overall elasticity and durability of the sealing structure. Secondly, the rubber core and filler are wrapped with PTFE tape to protect the inner structure from chemical corrosion, improving the overall chemical resistance of the sealing structure. In addition, the PTFE tape protective layer prevents gas or liquid penetration, thereby achieving excellent sealing performance. Furthermore, the sealing structure is square in shape, making it sturdy, and the nylon ropes embedded at the four corners of the protective layer effectively resist mechanical damage and extend service life. Attached Figure Description

[0017] Figure 1 This is a cross-sectional schematic diagram of the hatch cover sealing structure in an embodiment of this utility model. Detailed Implementation

[0018] To make the technical means, creative features, objectives and effects of this utility model easy to understand, the following embodiments, in conjunction with the accompanying drawings, will specifically illustrate the technical solution of this utility model.

[0019] like Figure 1 As shown, this embodiment provides a ship hatch cover sealing structure including a rubber core 2, a partition 3, a main body layer, a protective layer 9, and a sheath layer 11 arranged from the inside to the outside.

[0020] The rubber core 2 is a hollow EPDM rubber core with a circular cross-sectional profile and a central hole 1. EPDM rubber has high compression and recovery capabilities, providing excellent elasticity for the entire hatch cover sealing structure. Furthermore, the central hole enhances the overall compressibility and resilience of the hatch cover sealing structure, ensuring it maintains good elasticity even during frequent compression and rebound.

[0021] The spacer layer 3 is a polytetrafluoroethylene (PTFE) tape wrapped around the outside of the rubber core 2. The PTFE tape is a commercially available product. It is spirally wrapped around the outside of the EPDM rubber core 2. The thickness of the spacer layer 3 is 1.2mm to 2.5mm. The PTFE tape spacer layer has chemical resistance, preventing chemicals from penetrating into the EPDM rubber core and protecting the rubber layer from chemical corrosion.

[0022] The main body layer has a circular cross-sectional profile and is equipped with multiple layers of polypropylene yarn filler. A protective film, which is polytetrafluoroethylene (PTFE) tape, is placed between adjacent polypropylene yarn fillers. The polypropylene yarn fillers are commercially available, woven from polypropylene yarn, and the PTFE tape is attached to the filler layer in a spiral-wrap manner. In this embodiment, see [reference needed]. Figure 1 In sections 4, 6, and 8, the main body layer contains three layers of polypropylene yarn filler, each with an equal thickness. The overall thickness of the main body layer is adjusted according to the actual requirements of different hatch cover specifications. See also Figure 1 In section 5 and 7, two protective films 5 and 7 are installed in the main body layer, each with a thickness of 0.4mm to 1.0mm. In the main body layer, the polypropylene yarn filler is characterized by chemical corrosion resistance, elasticity, and durability, while the protective film of polytetrafluoroethylene tape protects the inner polypropylene yarn filler from chemical penetration and corrosion.

[0023] The protective layer 9 is a polytetrafluoroethylene (PTFE) tape wrapped around the outside of the main layer. The thickness of the protective layer 9 is greater than that of a single layer of polypropylene yarn filler. This thicker PTFE tape protective layer protects the entire sealing structure. During operation, the sealing structure comes into direct contact with external chemicals that need to be sealed. Due to the chemical resistance of PTFE, this protective layer protects the entire sealing structure from corrosion and prevents chemicals from penetrating inwards. The protective layer 9 has a square cross-section, and a nylon rope 10 is embedded at each of the four apex positions. While the square cross-section of the sealing structure provides robustness, its four apex positions are stress concentration points. Hard particles from chemicals tend to accumulate at these corners, exacerbating wear on the seal. Embedding nylon ropes at the four corners increases the strength of the corners, preventing wear on the sealing structure and extending its service life.

[0024] The sheath layer 11 is a woven layer of polytetrafluoroethylene (PTFE) yarn wrapped around the outermost layer, and the thickness of the sheath layer 11 is 0.5mm to 2.0mm. The PTFE yarn woven layer uses commercially available products. Because the strength of PTFE yarn is higher than that of PTFE tape, the sheath layer made of PTFE yarn can protect the inner PTFE tape from external mechanical damage.

[0025] This embodiment provides a hatch cover sealing structure in which the overall dimensions of the sealing structure can be adapted to the actual conditions of the hatch cover. Therefore, the dimensions of the EPDM rubber core and the central circular hole, the thickness of the main body layer, and the thickness of the protective layer are all set accordingly based on the actual situation. Furthermore, this hatch cover sealing structure is a sealing strip, which is manufactured into annular sealing strips of various diameters using existing conventional technology to meet the sealing requirements of hatch covers of different specifications.

[0026] The above embodiments are merely exemplary embodiments of the present invention and are not intended to limit the scope of protection of the present invention. For those skilled in the art, the present invention can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention are included within the scope of protection of the present invention.

Claims

1. A ship hatch cover sealing structure, characterized in that, It includes, from the inside out, a rubber core, a separator, a main body layer, a protective layer, and a sheath layer. The rubber core is a hollow EPDM rubber core. The partition is a polytetrafluoroethylene tape wrapped around the outside of the EPDM rubber core. The main body layer is provided with multiple layers of polypropylene yarn filler, and a protective film, which is polytetrafluoroethylene tape, is provided between adjacent polypropylene yarn filler layers. The protective layer is a polytetrafluoroethylene tape wrapped around the outside of the main body layer. The cross-sectional outline of the protective layer is square, and a nylon rope is embedded at each of the four apex corners of the protective layer. The sheath layer is a woven layer of polytetrafluoroethylene yarn wrapped around the outermost layer.

2. The hatch cover sealing structure as described in claim 1, characterized in that: in, The rubber core has a circular cross-sectional profile and a circular hole at its center.

3. The hatch cover sealing structure as described in claim 1, characterized in that: in, The thickness of the partition is 1.2mm to 2.5mm.

4. The hatch cover sealing structure as described in claim 1, characterized in that: in, The main body layer has a circular cross-sectional profile, and three layers of polypropylene yarn filler are provided in the main body layer.

5. The hatch cover sealing structure as described in claim 4, characterized in that: in, Each layer of the polypropylene yarn filler has the same thickness.

6. The hatch cover sealing structure as described in claim 1 or 4, characterized in that: in, The thickness of each protective film layer is 0.4 mm to 1.0 mm.

7. The hatch cover sealing structure as described in claim 1, characterized in that: in, The thickness of the protective layer is greater than the thickness of a single layer of the polypropylene yarn filler.

8. The hatch cover sealing structure as described in claim 1, characterized in that: in, The thickness of the sheath layer is 0.5mm to 2.0mm.

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