Node polyurethane secondary filling structure for polyurethane directly-buried thermal insulation pipe

Abstract

The utility model relates to a node polyurethane secondary filling structure for a polyurethane direct burial thermal insulation pipe, which is applied to the field of polyurethane direct burial thermal insulation pipes and comprises two mounting sleeves, two vertically symmetrical accommodating cavities are dug at the corresponding ends of the two mounting sleeves, and the sections of the mounting sleeves are divided into T shapes by the two accommodating cavities. A containing cavity is formed in the arc-shaped inner wall of the mounting sleeve, folding pads are fixedly connected to the transverse inner wall of the containing cavity, extending sleeves are fixedly connected to the ends, away from each other, of the two folding pads, pulling plates are fixedly connected to the ends, away from each other, of the two extending sleeves, a plurality of limiting grooves are formed in the arc-shaped inner wall of the containing cavity, and limiting blocks are arranged in the limiting grooves. When the secondary filling structure is used, the length of the secondary filling structure can be adjusted according to the exposed length of the working steel pipe at the joint, when the working steel pipe is wrapped and filled, the secondary filling structure does not need to be cut and adjusted, use of workers is facilitated, and waste of materials can be effectively reduced.

Description

Technical Field

[0001] The utility model relates to a secondary filling structure, in particular to a node polyurethane secondary filling structure for polyurethane directly buried insulating pipes applied to the field of polyurethane directly buried insulating pipes. Background Art

[0002] The prefabricated directly buried insulating pipe with high-density polyethylene plastic outer protection and polyurethane foam is popular with people because of its excellent performance, convenient construction and long service life. It is composed of a working steel pipe for conveying medium, a polyurethane insulating layer and a polyethylene plastic outer protection pipe, which are combined outward in turn by equipment. The laying methods include direct burial, overhead and trench.

[0003] When two polyurethane directly buried insulating pipes are connected, part of the working steel pipe will be exposed outside. Therefore, it is necessary to carry out secondary wrapping and filling on this part of the exposed working steel pipe. However, the length of the exposed working steel pipe is uncertain, and most of the existing secondary filling structures are of fixed dimensions. When wrapping and filling the working steel pipe, it is necessary to cut and adjust the filling structure according to the exposed length, which is not only time-consuming and laborious, but also causes waste of some materials. Summary of the Utility Model

[0004] Aiming at the above-mentioned prior art, the technical problem to be solved by the utility model is that most of the existing secondary filling structures are of fixed dimensions, while the dimensions of the working steel pipe exposed outside during connection are not fixed. When wrapping and filling it, it is also necessary to cut and adjust the secondary filling structure, which is not only time-consuming and laborious, but also causes waste of some materials.

[0005] To solve the above problems, the utility model provides a node polyurethane secondary filling structure for polyurethane directly buried insulating pipes, which includes two installation sleeves. Two symmetrically arranged accommodation cavities are respectively opened at one end of the two installation sleeves corresponding to each other. The cross section of the installation sleeve is divided into a T shape by the two accommodation cavities. A folding pad is fixedly connected to the transverse inner wall of the accommodation cavity. Extension sleeves are fixedly connected to one ends of the two folding pads away from each other. Pulling plates are fixedly connected to one ends of the two extension sleeves away from each other. A plurality of limiting grooves are opened on the arc-shaped inner wall of the accommodation cavity. Limiting blocks are arranged in the limiting grooves. One ends of two longitudinally opposite limiting blocks corresponding to each other are respectively fixedly connected to the adjacent extension sleeves. Four corners of the longitudinal surface of one of the installation sleeves are respectively fixedly connected with positioning rods. A plurality of positioning holes corresponding to the plurality of positioning rods are respectively opened on the longitudinal surface of the other installation sleeve. Two magnetic blocks are arranged at one end of the positioning rod facing the positioning hole. One of the magnetic blocks is fixedly connected to the circular inner wall of the positioning hole, and the other magnetic block is fixedly connected to the positioning rod. A rubber piston is fixedly sleeved on the outer surface of the positioning rod.

[0006] In the above-mentioned polyurethane secondary filling structure for directly buried polyurethane heat-insulated pipes, the length of the secondary filling structure can be adjusted according to the exposed length of the working steel pipe at the joint. When wrapping and filling the working steel pipe, there is no need to cut and adjust the secondary filling structure, which not only facilitates the use by the staff but also effectively reduces the waste of materials.

[0007] As a further improvement of the present application, one end of each of the two pull plates corresponds to and fits against the upper and lower ends of the mounting sleeve. The mounting sleeve, the accommodating cavity, the folding pad, the extension sleeve, and the pull plates are all arc-shaped.

[0008] As a further improvement of the present application, the two magnetic blocks attract each other. The magnetic blocks, the positioning rods, and the rubber pistons are all located within the positioning holes.

[0009] As a further improvement of the present application, both the mounting sleeve and the extension sleeve are made of polyurethane material, and the folding pad is made of heat-insulating hose material.

[0010] As another improvement of the present application, a plurality of limiting grooves are distributed in a circular array around the central axis of the mounting sleeve. Both the limiting grooves and the limiting blocks are in a T shape.

[0011] As another improvement of the present application, one end of each of the two pull plates that is far from each other is fixedly connected with a positive magic tape. One end of each of the two positive magic tapes that is far from each other is adhered with a negative magic tape. One end of each of the two negative magic tapes that is far from each other is fixedly connected with a plurality of insertion rods. A handle is fixedly connected to the surface of the pull plate.

[0012] In summary, during the actual application process, the two mounting sleeves are sleeved on the outer surface of the exposed working steel pipe. The positioning rods are inserted into the positioning holes so that the two magnetic blocks fit against each other, and the rubber pistons are located within the positioning holes, thereby installing and fixing the two mounting sleeves. Then, according to the length of the exposed working steel pipe, the pull plates are pulled outwards, causing the extension sleeves to move outwards while fitting against the working steel pipe. At this time, the folding pads are stretched outwards and fit against the working steel pipe until the mounting sleeves and the extension sleeves completely wrap and fill the exposed working steel pipe. When in use, there is no need to cut and adjust the secondary filling structure, which not only facilitates the use by the staff but also effectively reduces the waste of materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a schematic three-dimensional structure diagram of the first embodiment of the present application;

[0014] Figure 2 is a schematic diagram showing the extension of the extension sleeve of the first embodiment of the present application;

[0015] Figure 3 is a schematic installation diagram of the first embodiment of the present application;

[0016] Figure 4Schematic diagram of the installation sleeve structure of the first embodiment of the present application;

[0017] Figure 5 Schematic diagram of the extension sleeve structure of the first embodiment of the present application;

[0018] Figure 6 Schematic diagram of the positioning rod structure of the first embodiment of the present application;

[0019] Figure 7 Schematic three - dimensional structure diagram of the second embodiment of the present application.

[0020] Explanation of the reference numerals in the figure:

[0021] 1 Installation sleeve, 2 Accommodation cavity, 3 Folding pad, 4 Extension sleeve, 5 Pulling plate, 6 Limiting groove, 7 Limiting block, 8 Positioning rod, 9 Positioning hole, 10 Magnet, 11 Rubber piston, 12 Positive magic tape, 13 Reverse magic tape, 14 Inserting rod, 15 Handle. Specific embodiments

[0022] The following will describe in detail the two embodiments of the present application with reference to the accompanying drawings.

[0023] The first embodiment:

[0024] Figure 1 、 Figure 2 And Figure 3 Show: A node polyurethane secondary filling structure for a polyurethane directly buried heat - insulating pipe, including two installation sleeves 1. One end of two corresponding pulling plates 5 is respectively attached to the upper and lower ends of the installation sleeve 1. The installation sleeve 1, the accommodation cavity 2, the folding pad 3, the extension sleeve 4 and the pulling plate 5 are all arc - shaped, so that the installation sleeve 1, the folding pad 3 and the extension sleeve 4 match the working steel pipe exposed outside. In the figure, A is the polyurethane directly buried heat - insulating pipe.

[0025] Figure 4 、 Figure 5 And Figure 6Shown: At one end of each of the two mounting sleeves 1, two vertically symmetric accommodating cavities 2 are drilled. The two accommodating cavities 2 divide the cross-section of the mounting sleeve 1 into a T-shape. A folding pad 3 is fixedly connected to the transverse inner wall of the accommodating cavity 2. When the extension sleeve 4 is pulled, the folding pad 3 is also stretched accordingly. The working steel pipe is wrapped by the folding pad 3. At one end of each of the two folding pads 3 away from each other, an extension sleeve 4 is fixedly connected. At one end of each of the two extension sleeves 4 away from each other, a pulling plate 5 is fixedly connected. The pulling plate 5 facilitates pulling the extension sleeve 4. A plurality of limiting grooves 6 are drilled in the arc-shaped inner wall of the accommodating cavity 2. A limiting block 7 is arranged in the limiting groove 6. One end of the two longitudinally opposite limiting blocks 7 corresponding to each other is fixedly connected to the adjacent extension sleeve 4 respectively. When the extension sleeve 4 is pulled, the limiting block 7 also moves inside the limiting groove 6 accordingly, so as to limit the extension sleeve 4. Both the mounting sleeve 1 and the extension sleeve 4 are made of polyurethane material, and the folding pad 3 is made of heat-insulating hose material. The plurality of limiting grooves 6 are distributed in a circular array around the central axis of the mounting sleeve 1. Both the limiting groove 6 and the limiting block 7 are T-shaped.

[0026] Figure 6 Shown: At the four corners of the longitudinal surface of one of the mounting sleeves 1, positioning rods 8 are fixedly connected respectively. A plurality of positioning holes 9 corresponding to the plurality of positioning rods 8 respectively are drilled on the longitudinal surface of the other mounting sleeve 1. At one end of the positioning rod 8 facing the positioning hole 9, two magnetic blocks 10 are arranged. One of the magnetic blocks 10 is fixedly connected to the circular inner wall of the positioning hole 9, and the other magnetic block 10 is fixedly connected to the positioning rod 8. A rubber piston 11 is fixedly sleeved on the outer surface of the positioning rod 8. The two magnetic blocks 10 attract each other. The magnetic blocks 10, the positioning rods 8 and the rubber piston 11 are all located in the positioning hole 9. When wrapping and filling the working steel pipe, the two mounting sleeves 1 can be sleeved on the outer surface of the working steel pipe. The positioning rod 8 is inserted into the interior of the positioning hole 9, and the two magnetic blocks 10 will attract and fit with each other, so as to fix the two mounting sleeves 1. The rubber piston 11 is embedded into the interior of the positioning hole 9, so as to improve the stability when the two mounting sleeves 1 are installed.

[0027] During use, the two mounting sleeves 1 are sleeved on the outer surface of the exposed working steel pipe. The positioning rod 8 is inserted into the positioning hole 9 to make the two magnetic blocks 10 fit with each other. The rubber piston 11 is located in the positioning hole 9, so as to install and fix the two mounting sleeves 1. Then, according to the length of the exposed working steel pipe, the pulling plate 5 is pulled outwards, so that the extension sleeve 4 moves outwards while fitting the working steel pipe. At this time, the folding pad 3 is stretched outwards and fits with the working steel pipe until the mounting sleeve 1 and the extension sleeve 4 completely wrap and fill the exposed working steel pipe. During use, there is no need to cut and adjust the secondary filling structure, which is not only convenient for the staff to use, but also can effectively reduce the waste of materials.

[0028] The second implementation method:

[0029] On the basis of the first embodiment, this embodiment adds a positive hook-and-loop fastener 12, a negative hook-and-loop fastener 13, a plug rod 14 and a handle 15, and the rest is the same as the first embodiment.

[0030] Figure 7 It is shown that positive hook-and-loop fasteners 12 are fixedly connected to the far ends of the two pull plates 5 away from each other. Negative hook-and-loop fasteners 13 are adhered to the far ends of the two positive hook-and-loop fasteners 12 away from each other. Multiple plug rods 14 are fixedly connected to the far ends of the two negative hook-and-loop fasteners 13 away from each other. The plug rods 14 can fix the negative hook-and-loop fasteners 13 to the adjacent polyurethane thermal insulation layer, and then the positive hook-and-loop fasteners 12 and the negative hook-and-loop fasteners 13 are adhered to each other, so as to fix the pull plates 5 to the polyurethane thermal insulation layer. A handle 15 is fixedly connected to the surface of the pull plate 5, and the handle 15 facilitates pulling the pull plate 5.

[0031] During use, insert the plug rods 14 into the polyurethane thermal insulation layer at the node, and the pull plates 5 can be pulled through the handles 15 until the positive hook-and-loop fasteners 12 and the negative hook-and-loop fasteners 13 are fitted together, so as to fix the two pull plates 5 to the adjacent polyurethane thermal insulation layers respectively, thereby improving the stability during the use of the secondary filling structure.

[0032] Combined with the current actual requirements, the above-mentioned embodiment adopted in this application, the scope of protection is not limited to this. Within the scope of knowledge possessed by those skilled in the art, various changes made without departing from the concept of this application still fall within the protection scope of this utility model.

Claims

1. A polyurethane secondary filling structure for a polyurethane direct-buried thermal insulation pipe, comprising two mounting sleeves (1), characterized in that: Two symmetrical accommodating cavities (2) are respectively formed at corresponding ends of the two installation sleeves (1), the two accommodating cavities (2) divide the cross section of the installation sleeve (1) into a T shape, a folding pad (3) is fixedly connected to the transverse inner wall of the accommodating cavity (2), an extension sleeve (4) is fixedly connected to the ends of the two folding pads (3) that are away from each other, and a pull plate (5) is fixedly connected to the ends of the two extension sleeves (4) that are away from each other; A plurality of limiting grooves (6) are cut on the arc-shaped inner wall of the accommodating cavity (2), and limiting blocks (7) are arranged in the limiting grooves (6), and corresponding ends of two longitudinally opposite limiting blocks (7) are respectively fixedly connected to adjacent extension sleeves (4); Four corners of the longitudinal surface of one of the mounting sleeves (1) are fixedly connected to positioning rods (8), and a plurality of positioning holes (9) corresponding to the plurality of positioning rods (8) are bored on the longitudinal surface of the other mounting sleeve (1). Two magnetic blocks (10) are provided at one end of the positioning rod (8) facing the positioning hole (9), one of the magnetic blocks (10) is fixedly connected to the circular inner wall of the positioning hole (9), and the other of the magnetic blocks (10) is fixedly connected to the positioning rod (8), and a rubber piston (11) is provided on the outer surface of the positioning rod (8).

2. A polyurethane secondary filling structure for a polyurethane direct-buried thermal insulation pipe according to claim 1, characterized in that: The corresponding ends of the two pull plates (5) are respectively fitted with the upper and lower ends of the installation sleeve (1); the installation sleeve (1), the accommodating cavity (2), the folding pad (3), the extension sleeve (4) and the pull plates (5) are all arc-shaped.

3. The polyurethane secondary filling structure for a polyurethane direct-buried thermal insulation pipe according to claim 1, characterized in that: The two magnetic blocks (10) attract each other, and the magnetic blocks (10), the positioning rod (8) and the rubber piston (11) are all located in the positioning hole (9).

4. The polyurethane secondary filling structure for a polyurethane direct-buried thermal insulation pipe according to claim 1, characterized in that: The installation sleeve (1) and the extension sleeve (4) are both made of polyurethane material, and the folding pad (3) is made of thermal insulation hose material.

5. The polyurethane secondary filling structure for a polyurethane direct-buried thermal insulation pipe according to claim 1, characterized in that: The plurality of limit grooves (6) are distributed in a ring array around the central axis of the installation sleeve (1), and the limit grooves (6) and the limit blocks (7) are both T-shaped.

6. The polyurethane secondary filling structure for a polyurethane direct-buried thermal insulation pipe according to claim 1, characterized in that: The ends of the two pull plates (5) that are away from each other are fixedly connected to a positive Velcro (12), the ends of the two positive Velcro (12) that are away from each other are adhered to a reverse Velcro (13), the ends of the two reverse Velcro (13) that are away from each other are fixedly connected to a plurality of insertion rods (14), and a handle (15) is fixedly connected to the surface of the pull plate (5).

Images