A butt joint device for polyurethane insulation pipe

Abstract

The utility model relates to butt joint device technical field, and disclose a kind of butt joint device of polyurethane heat preservation pipe, including inner layer steel pipe and sealing rubber sleeve, the outside of the inner layer steel pipe is provided with butt joint mechanism and polyurethane insulation layer, the outside of the polyurethane insulation layer is provided with outer rubber sleeve.The butt joint device of polyurethane heat preservation pipe, by the butt joint mechanism being set, in use process, by the outer sleeve installation steel fixed half ring of two sides inner layer steel pipe, and move inner layer steel pipe, so that positioning rod can normally pass through locating hole block, when positioning rod is normal and locating hole block butt joint, it can be explained that two sides inner layer steel pipe can be attached together, without repeating calibration, reduce the time spent by positioning attachment, improve the convenience of inner layer steel pipe and inner layer steel pipe alignment before welding, simultaneously by screw nail through sealing rubber sleeve into the inside of rubber pad, can realize the uniform reinforcement of sealing rubber sleeve.

Description

Technical Field

[0001] This utility model relates to the field of docking device technology, specifically a docking device for polyurethane insulated pipes. Background Technology

[0002] Polyurethane insulated pipe, also known as prefabricated direct-buried polyurethane insulated pipe, is a high-efficiency insulated pipe widely used in centralized heating, cooling, petroleum, chemical and other pipeline transportation fields. The docking device is a component specifically designed to safely and reliably connect the ends of two prefabricated direct-buried polyurethane insulated pipes on the construction site, ensuring the continuity and sealing of the pipeline.

[0003] In existing technologies, when connecting polyurethane insulation pipes, the inner steel pipes are first aligned and welded together. Then, a rubber sleeve is applied to the outside of the joint and fixed (usually by inserting nails into the sleeve using a drill). A hole is then made in the outside of the sleeve, and polyurethane foam is injected into the hole. The foam expands and fills the space between the sleeve and the steel pipe, sealing the hole and completing the connection. However, in practical applications, the steel pipes need to be positioned and fitted before welding. Because the steel pipes are heavy and long, direct fitting makes it difficult to achieve a tight seal, often requiring multiple adjustments before welding, which is inconvenient. Therefore, an improved connection device for polyurethane insulation pipes is needed to solve these problems. Utility Model Content

[0004] The purpose of this utility model is to provide a docking device for polyurethane insulation pipes to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a docking device for a polyurethane insulation pipe, comprising an inner steel pipe and a sealing sleeve, wherein a docking mechanism and a polyurethane insulation layer are provided outside the inner steel pipe, and an outer sleeve is provided outside the polyurethane insulation layer.

[0006] Preferably, the docking mechanism includes a steel fixing half-ring, which is sleeved on the outside of the inner steel pipe. The steel fixing half-ring has a bolt and nut assembly inside. A fixing block is fixedly installed on the outside of the left side of the steel fixing half-ring, and a positioning hole block is fixedly installed on the outside of the right side of the steel fixing half-ring. A positioning rod is fixedly installed on the right side of the fixing block. A mounting seat is fixedly installed on the outside of the steel fixing half-ring. A threaded pin is installed in the internal thread of the mounting seat, and a rubber pad is provided on the outside of the threaded pin.

[0007] Preferably, the positioning hole block and the positioning rod are provided with holes at corresponding positions, and the positioning rod slides through the hole provided inside the positioning hole block.

[0008] Preferably, the radius of the steel fixing half ring corresponds to the radius of the inner steel pipe, and the upper and lower steel fixing half rings are in sliding contact with the surface of the inner steel pipe.

[0009] Preferably, a hole is provided at the corresponding position of the bolt of the steel fixing half ring and the bolt and nut combination, and the bolt of the bolt and nut combination slides through the hole provided inside the steel fixing half ring.

[0010] Preferably, there are four sets of mounting bases, threaded pins and rubber pads, and the four sets of mounting bases, threaded pins and rubber pads are evenly distributed on the outside of the steel fixing half ring.

[0011] Compared with the prior art, this utility model provides a docking device for polyurethane insulation pipes, which has the following beneficial effects: 1. The docking device of this polyurethane insulation pipe, through the docking mechanism, involves installing steel fixing half-rings on the outside of the inner steel pipes on both sides during use, and moving the inner steel pipes to allow the positioning rod to pass through the positioning hole block normally. When the positioning rod is properly docked with the positioning hole block, it indicates that the inner steel pipes on both sides can fit together without repeated calibration, reducing the time required for positioning and fitting, and improving the convenience of aligning the inner steel pipes before welding.

[0012] 2. The docking device of the polyurethane insulation pipe, through the set mounting seat threaded nail and rubber pad, can fit a sealing sleeve on the outside of the rubber pad for sealing during use. At the same time, the threaded nail passes through the sealing sleeve and enters the inside of the rubber pad, which can achieve uniform reinforcement of the sealing sleeve. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Figure 1 This is a schematic diagram of the appearance and structure of this utility model; Figure 2 This is a cross-sectional view of the external structure of this utility model; Figure 3 This is a schematic diagram of the external structure of the docking mechanism of this utility model; Figure 4This is an exploded view of the steel fixed semi-ring and its connection structure of this utility model; Figure 5 This is an exploded view of the mounting base and its connection structure of this utility model.

[0014] In the diagram: 1. Inner steel pipe; 2. Connecting mechanism; 21. Steel fixing half ring; 22. Bolt and nut assembly; 23. Fixing block; 24. Positioning rod; 25. Positioning hole block; 26. Mounting seat; 27. Threaded nail; 28. Rubber pad; 3. Polyurethane insulation layer; 4. Outer rubber sleeve; 5. Sealing rubber sleeve. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0017] Example: Please see Figure 1-5 This utility model provides a technical solution: a docking device for a polyurethane insulation pipe, including an inner steel pipe 1 and a sealing sleeve 5, a docking mechanism 2 and a polyurethane insulation layer 3 are provided on the outside of the inner steel pipe 1, and an outer sleeve 4 is provided on the outside of the polyurethane insulation layer 3.

[0018] Furthermore, the docking mechanism 2 includes a steel fixing half-ring 21, which is sleeved on the outside of the inner steel pipe 1. The steel fixing half-ring 21 has a bolt and nut assembly 22 inside. A fixing block 23 is fixedly installed on the outside of the left steel fixing half-ring 21, and a positioning hole block 25 is fixedly installed on the outside of the right steel fixing half-ring 21. A positioning rod 24 is fixedly installed on the right side of the fixing block 23. A mounting seat 26 is fixedly installed on the outside of the steel fixing half-ring 21. A threaded nail 27 is installed in the internal thread of the mounting seat 26. A rubber pad 28 is provided on the outside of the threaded nail 27. Through the docking mechanism 2, the inner steel pipe 1 can be quickly positioned and fitted before docking and welding. At the same time, it can provide support for the sealing sleeve 5 that is sealed on the outside before reinforcement.

[0019] Furthermore, holes are provided at corresponding positions of the positioning hole block 25 and the positioning rod 24, and the positioning rod 24 slides through the hole inside the positioning hole block 25. By aligning the positioning rod 24 with the hole inside the positioning hole block 25, it can be determined whether the inner steel pipes 1 on both sides can fit perfectly. When the positioning rod 24 can slide normally inside the positioning hole block 25, it can be said that the inner steel pipes 1 on both sides can be aligned.

[0020] Furthermore, the radius of the steel fixing half ring 21 corresponds to the radius of the inner steel pipe 1, and the upper and lower steel fixing half rings 21 slide in contact with the surface of the inner steel pipe 1. By using the upper and lower steel fixing half rings 21 sleeved on the outside of the inner steel pipe 1, they can be tightly installed on the outside of the inner steel pipe 1 with the assistance of bolt and nut combination 22.

[0021] Furthermore, holes are provided at the corresponding positions of the bolts of the steel fixing half ring 21 and the bolt and nut assembly 22, and the bolts of the bolt and nut assembly 22 slide through the holes provided inside the steel fixing half ring 21. Through the bolts that pass through the steel fixing half ring 21, the upper and lower steel fixing half rings 21 can be tightened with the cooperation of the nuts.

[0022] Furthermore, four sets of mounting bases 26, threaded nails 27, and rubber pads 28 are provided, and the four sets of mounting bases 26, threaded nails 27, and rubber pads 28 are evenly distributed on the outside of the steel fixing half-ring 21. By the mounting bases 26, threaded nails 27, and rubber pads 28 evenly distributed on the outside of the steel fixing half-ring 21, the threaded nails 27 can pass through the sealing sleeve 5 and the rubber pads 28 when the sealing sleeve 5 is installed, thereby achieving reinforcement.

[0023] In actual operation, when this device is used, firstly, a steel fixing half-ring 21 is sleeved on the outside of the inner steel pipe 1 that is installed on both sides. After connecting the upper and lower steel fixing half-rings 21 with bolt and nut combination 22, adjust their position so that the positioning rods 24 on both sides are on the same axis as the positioning hole block 25. Then tighten the bolt and nut combination 22 to fix the steel fixing half-ring 21. At this time, the connection between the inner steel pipes 1 begins. When the positioning rod 24 can pass through the inside of the positioning hole block 25 normally, it means that the inner steel pipes 1 are on the same axis. After the two are attached, they are in an aligned state. After the two inner steel pipes 1 are attached, welding can begin at their joint.

[0024] After welding, determine the distance between the mounting seats 26 on both sides and mark the corresponding positions on the surface of the rubber pad 28. Attach the rubber pad 28 to the mounting seat 26. Using a handheld drill, rotate the threaded nail 27 while passing it through the rubber pad 28 and into the interior of the mounting seat 26 to fix the rubber pad 28. Then, put the sealing sleeve 5 on the outside of the rubber pad 28, wrap it around once, and lock it using an external tightening device. Fix the extension of the sealing sleeve 5. Using a handheld drill, pass the threaded nail 27 through the upper and lower fitted sealing sleeve 5 to fix the sealing sleeve 5. Also, pass the threaded nail 27 through the outer sealing sleeve 5 and the inner rubber pad 28 to reinforce and fix the sealing sleeve 5.

[0025] After the sealing sleeve 5 is reinforced, an opening is made on the outside of the sealing sleeve 5, and polyurethane foam is injected into the opening. After the filling is completed and the sealing is finished, the opening can be sealed.

[0026] It should be noted that the width of the sealing sleeve 5 and the rubber pad 28 can be cut by yourself, specifically according to the length of the inner steel pipe 1 actually reserved in the polyurethane insulation pipe.

[0027] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

Claims

1. A connection device for a polyurethane insulation pipe, comprising an inner steel pipe (1) and a sealing sleeve (5), characterized in that: The inner steel pipe (1) is provided with a docking mechanism (2) and a polyurethane insulation layer (3) on the outside, and the polyurethane insulation layer (3) is provided with an outer rubber sleeve (4). The docking mechanism (2) includes a steel fixing half ring (21), which is sleeved on the outside of the inner steel pipe (1). The inside of the steel fixing half ring (21) is provided with a bolt and nut assembly (22). A fixing block (23) is fixedly installed on the outside of the left side of the steel fixing half ring (21), and a positioning hole block (25) is fixedly installed on the outside of the right side of the steel fixing half ring (21). A positioning rod (24) is fixedly installed on the right side of the fixing block (23). A mounting seat (26) is fixedly installed on the outside of the steel fixing half ring (21). A threaded nail (27) is installed in the internal thread of the mounting seat (26), and a rubber pad (28) is provided on the outside of the threaded nail (27).

2. The docking device for a polyurethane insulation pipe according to claim 1, characterized in that: The positioning hole block (25) and the positioning rod (24) are provided with holes at corresponding positions, and the positioning rod (24) slides through the hole provided inside the positioning hole block (25).

3. The docking device for a polyurethane insulation pipe according to claim 1, characterized in that: The radius of the steel fixed half ring (21) corresponds to the radius of the inner steel pipe (1), and the steel fixed half ring (21) on both the upper and lower sides slides in contact with the surface of the inner steel pipe (1).

4. The docking device for a polyurethane insulation pipe according to claim 1, characterized in that: Holes are provided at the corresponding positions of the bolts of the steel fixing half ring (21) and the bolt and nut assembly (22), and the bolts of the bolt and nut assembly (22) slide through the holes provided inside the steel fixing half ring (21).

5. The docking device for a polyurethane insulation pipe according to claim 1, characterized in that: The mounting base (26), threaded nail (27) and rubber pad (28) are provided in four sets, and the four sets of mounting base (26), threaded nail (27) and rubber pad (28) are evenly distributed on the outside of the steel fixing half ring (21).

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