Protective device for joint of gas pipeline

Abstract

The utility model discloses a protective device for a joint of a gas pipeline. Comprising a pipe sleeve, an upper fixing screw sleeve spirally connected to the upper portion of the pipe sleeve, a lower fixing screw sleeve spirally connected to the lower portion of the pipe sleeve, a connecting plate attached to the inner side of the opening side of the pipe sleeve, a connecting mechanism arranged between the pipe sleeve and the connecting plate, and a protection mechanism fixedly connected to the inner wall of the connecting plate. In the protective device for the gas pipeline joint, the pipe sleeve is coated with epoxy resin and cyclohexanone, and the waterproof surface layer and the flame-retardant surface layer are arranged, so that the service life of the protective device is prolonged, and the protective device has higher contractility, creep resistance, aging resistance, impact resistance, heat resistance and the like, and has good chemical corrosion resistance, water soaking resistance, water vapor permeation resistance and the like; the service life is the same as that of the pipeline.

Description

Technical Field

[0001] The utility model relates to the technical field of gas pipeline connection protection, in particular to a gas pipeline connection protection device. Background Art

[0002] Buried gas pipelines are in contact with water, soil and air underground and are susceptible to chemical corrosion, which has a very bad impact on the safety and good operation of the entire urban gas pipeline network. Therefore, when laying underground gas pipelines, anti-corrosion measures must be taken and anti-corrosion technology must be used to ensure the safety of the pipelines in the gas transportation network and increase the service life of the gas pipelines.

[0003] Buried steel pipes are in contact with water and soil underground, which easily produces an electrochemical dissolution process and forms a corrosion cell, which leads to pipeline perforation. From this classification perspective, underground deep-buried gas pipelines are mostly locally corroded, and this type of corrosion is the most harmful, especially for the most commonly used gas pipeline steel-plastic transition device. Since the steel pipe end of the steel-plastic conversion joint is made of steel, its own corrosion resistance is far from meeting the requirements of polyethylene (PE) pipes. In addition, most of the steel-plastic conversion joints are buried in humid underground or exposed to the air, and the rust situation is particularly serious.

[0004] Therefore, those skilled in the art provide a gas pipeline connection protection device to solve the problems raised in the above background technology. Utility Model Content

[0005] The utility model aims to provide a protective device for gas pipeline joints to solve the problems of serious corrosion and short service life of existing steel-plastic transition devices of gas pipeline networks proposed in the above background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A gas pipeline joint protection device, comprising: a pipe sleeve, an upper fixing screw sleeve spirally connected to the upper part of the pipe sleeve, a lower fixing screw sleeve spirally connected to the lower part of the pipe sleeve, a connecting plate attached to the inner side of the opening side of the pipe sleeve, a connecting mechanism arranged between the pipe sleeve and the connecting plate, and a protection mechanism fixedly connected to the inner wall of the connecting plate;

[0008] The protection mechanism includes: a protective cover fixedly connected to the inner wall of the connecting plate, a waterproof surface layer arranged on the outside of the protective cover, a flame retardant surface layer arranged on the inside of the protective cover, and a rubber connecting layer connected between the waterproof surface layer and the flame retardant surface layer.

[0009] As a further solution of the utility model: the connection mechanism includes: a slider fixedly connected to the inner wall of the opening side of the pipe sleeve, a horizontal slide groove transversely opened in the middle of the outer wall of the connection plate, and a vertical slide groove longitudinally opened on the left and right sides of the outer wall of the connection plate.

[0010] As a further solution of the utility model: the horizontal sliding groove and the vertical sliding groove are respectively connected to the sliding block in a sliding cooperation manner.

[0011] As a further solution of the utility model: the waterproof surface layer and the flame retardant surface layer are spaced 2 mm apart, and a closed cavity is formed between the waterproof surface layer and the flame retardant surface layer via a rubber connecting layer.

[0012] As a further solution of the utility model: air holes for exhausting air are provided on the left and right sides of the rubber connecting layer.

[0013] As a further solution of the utility model: it also includes: screw ends fixedly connected to the upper and lower ends of the pipe sleeve.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. A protective cover composed of a waterproof surface layer, a rubber connection layer and a flame-retardant surface layer is arranged on the inner side of the connection plate. The protective cover is hollow inside and can store air. When the protective cover is squeezed by external force, the air inside will overflow from the pores to achieve pressure balance. The pores are designed to prevent air leakage. Only when the pressure is high will the air be allowed to flow out. After the pressure is balanced, the air will not leak out. At this time, the protective cover is tightly attached to the outer wall of the steel-plastic conversion joint, which has a waterproof, flame-retardant and sealed protection effect on the steel-plastic conversion joint.

[0016] 2. The pipe sleeve adopts a tubular structure with an opening, which is convenient for installation and connection to the outside of the steel-plastic conversion joint. The connecting plate arranged on the inside of the pipe sleeve can be matched with the pipe sleeve so that the entire protective device can be enclosed to the outside of the steel-plastic conversion joint. On the other hand, the connecting plate can play a very good compression and protection role on the steel-plastic conversion joint, so that the steel-plastic conversion joint can obtain a very stable packaging protection effect.

[0017] 3. Install the upper fixing screw sleeve and the lower fixing screw sleeve at both ends of the pipe sleeve respectively, lock the upper fixing screw sleeve and the lower fixing screw sleeve to tighten the pipe sleeve, and match it with the connecting plate to firmly wrap the steel-plastic conversion joint.

[0018] 4. In the protective device at the gas pipeline connection, the pipe sleeve is covered with epoxy resin and cyclohexanone, and a waterproof surface layer and a flame retardant surface layer are provided to extend the service life of the protective device, so that it has stronger shrinkage force, anti-creep, aging resistance, impact resistance, heat resistance and other properties, and good resistance to chemical corrosion, water immersion, water vapor penetration and other properties, and its service life is the same as the age of the pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The present invention is a structural schematic diagram of a protective device for a gas pipeline connection.

[0020] Figure 2 This is an enlarged schematic diagram of the structure of part A in a protective device for a gas pipeline connection.

[0021] Figure 3 The figure is a schematic diagram of the overall structure of a protective device for a gas pipeline connection.

[0022] Figure 4 The present invention is a schematic diagram of the local structure of a pipe sleeve in a protective device for a gas pipeline connection.

[0023] In the figure: 1. pipe sleeve; 2. screw end; 3. upper fixing screw sleeve; 4. lower fixing screw sleeve; 5. slider; 6. connecting plate; 7. horizontal slide groove; 8. vertical slide groove; 9. protective cover; 10. waterproof surface layer; 11. rubber connecting layer; 12. flame retardant surface layer; 13. air hole. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] See also Figure 1 to Figure 4 The embodiment of the utility model provides a gas pipeline connection protection device, comprising: a pipe sleeve 1, an upper fixing screw sleeve 3 spirally connected to the upper part of the pipe sleeve 1, a lower fixing screw sleeve 4 spirally connected to the lower part of the pipe sleeve 1, a connecting plate 6 attached to the inner side of the opening side of the pipe sleeve 1, a connecting mechanism arranged between the pipe sleeve 1 and the connecting plate 6, and a protective mechanism fixedly connected to the inner wall of the connecting plate 6;

[0026] It also includes: screw ends 2 fixedly connected to the upper and lower ends of the pipe sleeve 1;

[0027] The pipe sleeve 1 is designed to be a circular tubular structure with an opening, so it has the elasticity to collapse and can well wrap the steel-plastic conversion joint. The structural design of the pipe sleeve 1 makes it easier to connect the pipe sleeve 1 with the steel-plastic conversion joint, making the operation simple. The pipe sleeve 1 is connected to the upper fixed screw sleeve 3 and the lower fixed screw sleeve 4 by the screw end 2 to achieve the fixing effect. The pipe sleeve 1 is wrapped around the outside of the steel-plastic conversion joint, and the upper fixed screw sleeve 3 and the lower fixed screw sleeve 4 are installed and tightened to tightly wrap the steel-plastic conversion joint to achieve the protective effect. The pipe sleeve 1 is coated with a coating, and the coating uses epoxy resin and cyclohexanone as raw materials, which can make the pipe sleeve 1 have extremely high anti-corrosion performance and a long service life. The specific production method is: accurately weigh the epoxy resin, heat it to 60 degrees Celsius to fully soften it, then add cyclohexanone to stir it, let it stand for 20 minutes to fully mix the materials, and evenly spray the obtained material onto the inner and outer walls of the pipe sleeve 1. The spraying time is controlled at about 20 seconds to extend the service life of the epoxy resin paint.

[0028] The connection mechanism includes: a slider 5 fixedly connected to the inner wall of the opening side of the pipe sleeve 1, a horizontal slide groove 7 transversely opened in the middle of the outer wall of the connection plate 6, and a vertical slide groove 8 longitudinally opened on the left and right sides of the outer wall of the connection plate 6;

[0029] The horizontal slide groove 7 and the vertical slide groove 8 are respectively connected with the slider 5 in a sliding manner;

[0030] The connecting mechanism is used to connect the pipe sleeve 1 and the connecting plate 6, so that the connection between the two is stable and firm. The connecting plate 6 is well connected to the pipe sleeve 1 by matching the size of the slider 5 with the horizontal slide groove 7 and the vertical slide groove 8. The connecting plate 6 can be moved up and down by using the vertical slide groove 8 to facilitate the connection and assembly of the connecting plate 6 and the pipe sleeve 1. By using the horizontal slide groove 7, when the pipe sleeve 1 is gradually tightened, the position of the connecting plate 6 is stable and the connection with the pipe sleeve 1 is always firm, so that the pipe sleeve 1 and the connecting plate 6 can be firmly wrapped around the outside of the steel-plastic conversion joint, thereby providing effective protection for the steel-plastic conversion joint.

[0031] The protection mechanism includes: a protective cover 9 fixedly connected to the inner wall of the connecting plate 6, a waterproof surface layer 10 arranged on the outer side of the protective cover 9, a flame retardant surface layer 12 arranged on the inner side of the protective cover 9, and a rubber connecting layer 11 connected between the waterproof surface layer 10 and the flame retardant surface layer 12;

[0032] The waterproof surface layer 10 and the flame retardant surface layer 12 are spaced 2 mm apart, and a closed cavity is formed between the waterproof surface layer 10 and the flame retardant surface layer 12 via a rubber connecting layer 11;

[0033] Air holes 13 for exhaust are provided on both sides of the rubber connecting layer 11;

[0034] The protective mechanism is specifically a protective cover 9, which adopts a spliced ​​structure. The outer waterproof surface layer 10 and the inner flame retardant surface layer 12 are mainly made of rubber material, wherein the waterproof surface layer 10 is coated with a single-component polyurethane waterproof coating for waterproofing, and the flame retardant surface layer 12 uses antimony trioxide flame retardant as a mixed raw material for flame retardancy. The waterproof surface layer 10 and the flame retardant surface layer 12 have good flexibility and elasticity, and the two end positions between the waterproof surface layer 10 and the flame retardant surface layer 12 are each sealed by a rubber connecting layer 11, so that a sealed cavity is formed between the waterproof surface layer 10 and the flame retardant surface layer 12, and air can be stored in the sealed cavity. The protective cover 9 is directly attached to the outer wall of the steel-plastic conversion joint, and the waterproof surface layer 10 and the flame retardant surface layer 12 are used to waterproof and flame retard the steel-plastic conversion joint, and can fill the gap between the entire protective device and the steel-plastic conversion joint. , so that the protective device and the steel-plastic conversion joint fit tightly, preventing outside air or water from entering the gap and corroding the outer wall of the steel-plastic conversion joint. When installing the protective device, it is first necessary to put the protective sleeve 9 on the outside of the steel-plastic conversion joint, and then use the vertical slide groove 8 to slide the pipe sleeve 1 outside the connecting plate 6, slide the pipe sleeve 1 to a position relatively aligned with the connecting plate 6, install and lock the upper fixing screw sleeve 3 and the lower fixing screw sleeve 4, the pipe sleeve 1 gradually shrinks, and the protective sleeve 9 gradually presses the outer wall of the steel-plastic conversion joint, gradually filling the gap, and in order to ensure a tighter and more fixed connection, a small amount of air in the inner cavity of the protective sleeve 9 will overflow from the air hole 13 due to extrusion, until the external pressure of the protective sleeve 9 is balanced with the internal air pressure. At this time, the protective device and the steel-plastic conversion joint fit tightly and are firmly connected. External air and water will not enter the interior of the protective device through the port, and the steel-plastic conversion joint is thus fully and well protected.

[0035] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A gas pipeline connection protection device, characterized in that: include: A pipe sleeve (1), an upper fixing screw sleeve (3) screwed to the top of the pipe sleeve (1), a lower fixing screw sleeve (4) screwed to the bottom of the pipe sleeve (1), a connecting plate (6) attached to the inner side of the opening of the pipe sleeve (1), a connecting mechanism provided between the pipe sleeve (1) and the connecting plate (6), and a protective mechanism fixedly connected to the inner wall of the connecting plate (6); The protective mechanism comprises: a protective cover (9) fixedly connected to the inner wall of the connecting plate (6), a waterproof surface layer (10) arranged on the outside of the protective cover (9), a flame retardant surface layer (12) arranged on the inside of the protective cover (9), and a rubber connecting layer (11) connected between the waterproof surface layer (10) and the flame retardant surface layer (12).

2. A gas pipeline connection protection device according to claim 1, characterized in that: The connection mechanism comprises: a sliding block (5) fixedly connected to the inner wall of the opening side of the pipe sleeve (1), a transverse sliding groove (7) transversely arranged in the middle of the outer wall surface of the connection plate (6), and vertical sliding grooves (8) longitudinally arranged on the left and right sides of the outer wall surface of the connection plate (6).

3. A gas pipeline connection protection device according to claim 2, characterized in that: The transverse sliding groove (7) and the vertical sliding groove (8) are respectively connected to the sliding block (5) in a sliding cooperation manner.

4. A gas pipeline connection protection device according to claim 1, characterized in that: The waterproof surface layer (10) and the flame retardant surface layer (12) are spaced 2 mm apart, and a closed cavity is formed between the waterproof surface layer (10) and the flame retardant surface layer (12) via a rubber connecting layer (11).

5. A gas pipeline connection protection device according to claim 1, characterized in that: Air holes (13) for exhaust are provided on both sides of the rubber connection layer (11).

6. A gas pipeline connection protection device according to claim 1, characterized in that: Also includes: The screw ends (2) are fixedly connected to the upper and lower ends of the pipe sleeve (1).

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