Heat preservation pipeline for heat supply pipe network

Abstract

The invention discloses a heat preservation pipeline for a heat supply pipe network, and relates to the technical field of heat supply pipe networks, the heat preservation pipeline comprises a pipeline body, the surface of the pipeline body is sleeved with an outer protective layer, a heat preservation layer is arranged between the surface of the pipeline body and the outer protective layer, and evenly-distributed protective layers are installed on the surface of the outer protective layer. The protective layer comprises an upper protective shell and a lower protective shell, a high-pressure foaming machine is used for injecting rigid polyurethane foaming plastic stock solution into a cavity between the surface of the pipeline body and the outer protective layer through the injection hole, a heat preservation layer is formed, heat preservation is conducted on the pipeline body, and meanwhile the self weight of a heat supply network is supported. The upper protective shell and the lower protective shell of the protective layer are prefabricated into black (yellow) plastic shells with a certain wall thickness through a high-density polyethylene material, and the black (yellow) plastic shells are uniformly arranged on the surface of the outer protective layer to protect the heat preservation layer from being damaged by mechanical hard objects, and meanwhile the anti-corrosion and waterproof effects are achieved. Bolts and nuts for fixing the flange are protected through the two protection assemblies.

Description

Technical Field

[0001] The present invention relates to the technical field of heating pipe networks, and in particular to a heat-insulating pipe used in a heating pipe network. Background Art

[0002] The heating pipeline network is an important part of the urban centralized heating system. It is responsible for transporting the heat generated by the heat source to various heat users. It is mainly composed of the heat source, pipeline network and heat users. The layout of the heating pipeline network and the determination of the pipeline's plane position (i.e., routing) are the two main contents of the heating pipeline network layout. The laying and installation of the heating pipeline is completed according to the designated route, and the heat source is transported through the pipeline.

[0003] However, when the existing heat source transmission insulated pipe is in use, the insulation effect, corrosion resistance and waterproofness of the insulation material installed on the outer layer are poor, and the insulation material installed on the pipe surface is easily damaged after being hit by mechanical hard objects. Secondly, the bolts and nuts used to connect the pipe flanges are prone to rust after long-term exposure to the sun and rain, which reduces the service life of the bolts and nuts and is inconvenient to disassemble the flanges later. In response to the above problems, the inventors proposed an insulated pipe for a heating pipe network to solve the above problems. Summary of the Invention

[0004] In order to solve the problem that the insulation material installed on the outer layer of the existing heat source transmission insulation pipeline has poor insulation effect, corrosion resistance and waterproofness when in use; the purpose of the present invention is to provide an insulation pipeline for a heating pipeline network.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions: an insulated pipe for a heating network, comprising a pipe body, the surface of the pipe body being provided with an outer protective layer, an insulation layer being provided between the surface of the pipe body and the outer protective layer, the surface of the outer protective layer being provided with a uniformly distributed protective layer, the protective layer comprising an upper protective shell and a lower protective shell, a flange being fixedly provided at one end of the pipe body, a protective component being detachably provided on the surface of the flange, a rigid polyurethane foam plastic concentrate being injected through an injection hole into the cavity between the surface of the pipe body and the outer protective layer using a high-pressure foaming machine to form an insulation layer, insulate the pipe body and support the deadweight of the heating network at the same time, the protective layer being made of high-density polyethylene material, the upper protective shell and the lower protective shell of the protective layer being prefabricated into a black (yellow) plastic shell with a certain wall thickness using high-density polyethylene material, and being evenly installed on the surface of the outer protective layer to protect the insulation layer from damage by mechanical hard objects, while also playing the role of corrosion prevention and waterproofing.

[0006] Preferably, the protective assembly includes an upper protective sleeve and a lower protective sleeve, the upper protective sleeve and the lower protective sleeve damping sleeve are arranged on the flange surface, both sides of the bottom surface of the upper protective sleeve are fixedly installed with connecting buckles, the connecting buckles are slidably carded in the lower protective sleeve, a positioning assembly is installed in one side of the lower protective sleeve, the positioning assembly includes a guide, the top surface of the guide is fixedly installed with a positioning pin, the bottom surface of the guide is fixedly installed with a return spring, the positioning pin is slidably inserted in the bottom surface of the connecting buckle through the guide and the return spring, the positioning assembly cooperates with the connecting buckle, when After the two flanges at the adjacent ends of the two pipe bodies are connected and fixed by bolts and nuts, the upper protective sleeve and the lower protective sleeve of the protective assembly are put on a flange surface, and with the cooperation of the connecting buckles installed on both sides of the bottom surface of the upper protective sleeve, the upper protective sleeve and the lower protective sleeve are positioned after being put on a flange surface. After the positioning is completed, with the cooperation of the guide and the reset spring in the positioning assembly, the positioning pin is controlled to be inserted into the corresponding connecting buckle to complete the installation and fixing of a protective assembly on a flange surface, and the bolts and nuts used to fix the flange are protected by the two protective assemblies.

[0007] Preferably, both sides of the upper protective shell and the lower protective shell are fixedly installed with positioning strips, and both sides of the positioning strips are fixedly installed with fixing parts. The upper and lower fixing parts on the same side of the upper and lower protective shells are internally threaded with fixing buckles, and the fixing buckles cooperate with the fixing parts. The upper protective shell and the lower protective shell are installed and fixed on the surface of the outer protective layer through the fixing parts installed on both sides of the positioning strips on both sides of the upper protective shell and the lower protective shell and the corresponding fixing buckles. The protective layer is set as an upper protective shell and a lower protective shell and is installed on the surface of the outer protective layer in sequence for fixation, which facilitates the disassembly and replacement of the damaged protective layer after the protective layer somewhere on the surface of the outer protective layer is damaged by mechanical hard objects in the later stage.

[0008] Preferably, evenly distributed injection holes are opened above the surface of the outer protective layer, and the injection holes cooperate with the thermal insulation layer. Positioning plugs are fixedly installed on the bottom surfaces of the positioning strips on both sides of the upper protective shell, and the positioning plugs are slidably inserted into the top surfaces of the positioning strips on both sides of the lower protective shell. Evenly distributed bolts are inserted into the two flanges on the adjacent sides of the two pipe bodies, and nuts are provided on the surface threads of the bolts, and the bolts and nuts cooperate with each other.

[0009] Preferably, a connecting piece is fixedly installed on one side of the surface of the guide piece, and a lifting piece is fixedly installed on one end of the connecting piece. The lifting piece cooperates with the positioning pin through the connecting piece and the guide piece. Slots are provided on the top surfaces of the positioning strips on both sides of the lower protective shell, and the positioning plug-in is slidably inserted in the slots. Damping grooves are provided on both sides of the top surface of the lower protective cover, and the connecting buckle damper is inserted in the damping groove. A support seat is installed under the pipe body, and the support seat fits with the surface of the lower protective shell.

[0010] Compared with the prior art, the present invention has the following beneficial effects:

[0011] 1. In the present invention, a high-pressure foaming machine is used to inject a rigid polyurethane foam plastic stock liquid into the cavity between the surface of the pipe body and the outer protective layer through an injection hole to form an insulation layer, thereby insulating the pipe body and supporting the weight of the heat network. The upper and lower protective shells of the protective layer are prefabricated into black (yellow) plastic shells of a certain wall thickness using high-density polyethylene material and are evenly installed on the surface of the outer protective layer to protect the insulation layer from damage by mechanical hard objects and to play an anti-corrosion and waterproof role.

[0012] 2. In the present invention, after the two flanges at the adjacent ends of the two pipe bodies are connected and fixed by bolts and nuts, the bolts and nuts used to fix the flanges are protected by two protective components, thereby solving the problem that the bolts and nuts used to connect the flanges rust due to long-term exposure to sunlight and rain, which reduces the service life of the bolts and nuts and makes it inconvenient to disassemble the flanges later.

[0013] 3. In the present invention, the protective layer is arranged into an upper protective shell and a lower protective shell and is sequentially installed on the surface of the outer protective layer for fixation, so that it is convenient to remove and replace the damaged protective layer when the protective layer somewhere on the surface of the outer protective layer is damaged by a mechanical hard object in the later stage, thereby saving costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0015] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0016] Figure 2 This is a schematic diagram of the structure of the pipe body, outer protective layer and flange of the present invention.

[0017] Figure 3 This is a schematic diagram of the flange matching protection assembly structure of the present invention.

[0018] Figure 4 For the present invention Figure 3 A magnified view of the structure at center A.

[0019] Figure 5 This is a schematic diagram of the decomposition structure of the protective layer of the present invention.

[0020] Figure 6 For the present invention Figure 5 Enlarged view of the structure at point B in the middle.

[0021] In the figure: 1. Pipe body; 2. Outer protective layer; 3. Insulation layer; 4. Protective layer; 5. Flange; 6. Protective assembly; 11. Support seat; 21. Injection hole; 41. Upper protective shell; 42. Lower protective shell; 43. Positioning strip; 431. Positioning plug-in; 432. Slot; 44. Fixing piece; 45. Fixing buckle; 51. Bolt; 52. Nut; 61. Upper protective sleeve; 611. Connecting buckle; 62. Lower protective sleeve; 621. Damping groove; 63. Positioning assembly; 631. Guide piece; 632. Positioning pin; 633. Return spring; 634. Connecting piece; 635. Pulling piece. DETAILED DESCRIPTION

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] Example: Figure 1-6 As shown, the present invention provides an insulated pipe for a heating network, comprising a pipe body 1, a surface of the pipe body 1 is provided with an outer protective layer 2, an insulation layer 3 is provided between the surface of the pipe body 1 and the outer protective layer 2, a uniformly distributed protective layer 4 is installed on the surface of the outer protective layer 2, the protective layer 4 comprises an upper protective shell 41 and a lower protective shell 42, a flange 5 is fixedly installed at one end of the pipe body 1, and a protective component 6 is detachably installed on the surface of the flange 5, a high-pressure foaming machine is used to inject a rigid polyurethane foam plastic stock solution into the cavity between the surface of the pipe body 1 and the outer protective layer 2 through an injection hole 21 to form an insulation layer 3, to insulate the pipe body 1 and support the deadweight of the heating network at the same time, the protective layer 4 is made of high-density polyethylene material, and the upper protective shell 41 and the lower protective shell 42 of the protective layer 4 are prefabricated into a black (yellow) plastic shell with a certain wall thickness through the high-density polyethylene material, and are evenly installed on the surface of the outer protective layer 2 to protect the insulation layer 3 from damage by mechanical hard objects, and at the same time play a role in corrosion prevention and waterproofing.

[0024] The protective assembly 6 includes an upper protective sleeve 61 and a lower protective sleeve 62. The upper protective sleeve 61 and the lower protective sleeve 62 are damping sleeves arranged on the surface of the flange 5. Connecting buckles 611 are fixedly installed on both sides of the bottom surface of the upper protective sleeve 61. The connecting buckle 611 is slidably clamped in the lower protective sleeve 62. A positioning assembly 63 is installed in one side of the lower protective sleeve 62. The positioning assembly 63 includes a guide member 631. A positioning latch 632 is fixedly installed on the top surface of the guide member 631. A return spring 633 is fixedly installed on the bottom surface of the guide member 631. The positioning latch 632 is slidably inserted into the bottom surface of the connecting buckle 611 through the guide member 631 and the return spring 633. The positioning assembly 63 and the connecting buckle 611 cooperate with each other.

[0025] By adopting the above technical solution, after the two flanges 5 at the adjacent ends of the two pipe bodies 1 are connected and fixed by the bolts 51 and nuts 52, the upper protective sleeve 61 and the lower protective sleeve 62 of the protective assembly 6 are sleeved on the surface of a flange 5, and with the cooperation of the connecting buckles 611 installed on both sides of the bottom surface of the upper protective sleeve 61, the upper protective sleeve 61 and the lower protective sleeve 62 are positioned after being sleeved on the surface of a flange 5. After the positioning is completed, with the cooperation of the guide part 631 and the return spring 633 in the positioning assembly 63, the positioning pin 632 is controlled to be inserted into the corresponding connecting buckle 611, completing the installation and fixing of a protective assembly 6 on the surface of a flange 5. The bolts 51 and nuts 52 used to fix the flanges 5 are protected by the two protective assemblies 6, which solves the problem that the bolts 51 and nuts 52 used to connect the flanges 5 will rust after long-term exposure to sun and rain, reducing the service life of the bolts 51 and nuts 52, and making it inconvenient to disassemble the flanges 5 later.

[0026] Positioning strips 43 are fixedly installed on both sides of the upper protective shell 41 and the lower protective shell 42. Fixing members 44 are fixedly installed on both sides of the positioning strips 43. The upper and lower fixing members 44 on the same side of the upper protective shell 41 and the lower protective shell 42 are internally threaded with fixing buckles 45, which cooperate with the fixing members 44.

[0027] By adopting the above technical solution, the upper protective shell 41 and the lower protective shell 42 are installed and fixed on the surface of the outer protective layer 2 by means of the fixing parts 44 installed on both sides of the positioning strips 43 on both sides of the upper protective shell 41 and the lower protective shell 42, in cooperation with the corresponding fixing buckles 45. By setting the protective layer 4 into the upper protective shell 41 and the lower protective shell 42 and installing them in sequence on the surface of the outer protective layer 2 for fixation, it is convenient to disassemble and replace the damaged protective layer 4 after the protective layer 4 somewhere on the surface of the outer protective layer 2 is damaged by a hard mechanical object in the future.

[0028] The outer sheath 2 is provided with uniformly distributed injection holes 21 on its surface, and the injection holes 21 cooperate with the thermal insulation layer 3;

[0029] By adopting the above technical solution, a high-pressure foaming machine is used to inject the rigid polyurethane foam plastic concentrate through the injection hole 21 into the cavity between the surface of the pipe body 1 and the outer protective layer 2 to form an insulation layer 3, which insulates the pipe body 1 and supports the weight of the heating network.

[0030] The bottom surfaces of the positioning strips 43 on both sides of the upper protective shell 41 are fixedly mounted with positioning plugs 431, and the positioning plugs 431 are slidably inserted into the top surfaces of the positioning strips 43 on both sides of the lower protective shell 42;

[0031] By adopting the above technical solution, the positioning plug-ins 431 respectively installed on the bottom surfaces of the positioning bars 43 on both sides of the upper protective shell 41 increase the stability and firmness of the connection between the upper protective shell 41 and the lower protective shell 42.

[0032] Evenly distributed bolts 51 are inserted into the two flanges 5 on the adjacent sides of the two pipe bodies 1. Nuts 52 are threadedly sleeved on the surface of the bolts 51. The bolts 51 and the nuts 52 cooperate with each other.

[0033] By adopting the above technical solution, with the cooperation of multiple sets of bolts 51 and corresponding nuts 52, the connection and fixation between the two flanges 5 on the adjacent sides of the two pipe bodies 1 are completed.

[0034] A connecting member 634 is fixedly mounted on one side of the surface of the guide member 631, and a pulling member 635 is fixedly mounted on one end of the connecting member 634. The pulling member 635 cooperates with the positioning pin 632 through the connecting member 634 and the guide member 631.

[0035] By adopting the above technical solution, the connection and fixation between the pulling member 635 and the guide member 631 are completed through the connecting member 634, and the pulling member 635 controls the connecting member 634 and the guide member 631 to drive the positioning pin 632 to be inserted and removed in the bottom surface of the corresponding connecting buckle 611.

[0036] The top surfaces of the positioning bars 43 on both sides of the lower protective shell 42 are provided with slots 432 , and the positioning plugs 431 are slidably inserted into the slots 432 ;

[0037] By adopting the above technical solution, the corresponding positioning plug-in 431 is inserted and positioned through the slots 432 respectively opened on the top surfaces of the positioning strips 43 on both sides of the lower protective shell 42.

[0038] Damping grooves 621 are provided on both sides of the top surface of the lower protective cover 62, and the connecting buckles 611 are inserted into the damping grooves 621 for damping;

[0039] By adopting the above technical solution, the insertion and positioning of the corresponding connecting buckle 611 is completed through the damping grooves 621 respectively opened on both sides of the top surface of the lower protective cover 62.

[0040] A support base 11 is installed below the pipe body 1, and the support base 11 and the surface of the lower protective shell 42 are in contact with each other;

[0041] By adopting the above technical solution, the pipe body 1 is supported and positioned by the support base 11 at intervals according to the laying length of the pipe body 1 .

[0042] Working principle: Use a high-pressure foaming machine to inject rigid polyurethane foam plastic stock liquid through the injection hole 21 into the cavity between the surface of the pipe body 1 and the outer sheath 2 to form a thermal insulation layer 3, which insulates the pipe body 1 and supports the weight of the heat network. The protective layer 4 is made of high-density polyethylene. The upper protective shell 41 and the lower protective shell 42 of the protective layer 4 are prefabricated into a black (yellow) plastic shell with a certain wall thickness using high-density polyethylene material. They are evenly installed on the surface of the outer sheath 2 to protect the thermal insulation layer 3 from damage by mechanical hard objects and play a role in corrosion prevention and waterproofing.

[0043] The upper protective shell 41 and the lower protective shell 42 are fixed to the surface of the outer protective layer 2 by the fixing parts 44 installed on both sides of the positioning strips 43 on both sides of the upper protective shell 41 and the lower protective shell 42, and the corresponding fixing buckles 45 are used to complete the installation and fixation of the upper protective shell 41 and the lower protective shell 42 on the surface of the outer protective layer 2. By configuring the protective layer 4 into the upper protective shell 41 and the lower protective shell 42 and sequentially installing them on the surface of the outer protective layer 2 for fixation, it is convenient to remove and replace the damaged protective layer 4 if it is damaged by a hard mechanical object at a certain location on the surface of the outer protective layer 2 in the future.

[0044] After the two flanges 5 at the adjacent ends of the two pipe bodies 1 are connected and fixed by bolts 51 and nuts 52, the upper protective sleeve 61 and the lower protective sleeve 62 of the protective component 6 are sleeved on the surface of a flange 5, and with the cooperation of the connecting buckles 611 installed on both sides of the bottom surface of the upper protective sleeve 61, the upper protective sleeve 61 and the lower protective sleeve 62 are positioned after being sleeved on the surface of a flange 5. After the positioning is completed, with the cooperation of the guide 631 and the return spring 633 in the positioning component 63, the positioning pin 632 is controlled to be inserted into the corresponding connecting buckle 611, completing the installation and fixing work of a protective component 6 on the surface of a flange 5, and the bolts 51 and nuts 52 used to fix the flange 5 are protected by the two protective components 6.

[0045] Obviously, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if such changes and modifications fall within the scope of the claims and their equivalents, the present invention is intended to include such changes and modifications.

Claims

1. A heat-insulating pipe for a heating network, comprising a pipe body (1), characterized in that: The surface of the pipe body (1) is sheathed with an outer protective layer (2), a heat-insulating layer (3) is provided between the surface of the pipe body (1) and the outer protective layer (2), a uniformly distributed protective layer (4) is installed on the surface of the outer protective layer (2), and the protective layer (4) includes an upper protective shell (41) and a lower protective shell (42), a flange (5) is fixedly installed at one end of the pipe body (1), and a protective component (6) is detachably installed on the surface of the flange (5).

2. The heat-insulating pipe for a heating network according to claim 1, characterized in that: The protective assembly (6) includes an upper protective sleeve (61) and a lower protective sleeve (62), and the upper protective sleeve (61) and the lower protective sleeve (62) are damping sleeves arranged on the surface of the flange (5). Connecting buckles (611) are fixedly installed on both sides of the bottom surface of the upper protective sleeve (61), and the connecting buckle (611) is slidably clamped in the lower protective sleeve (62). A positioning assembly (63) is installed in one side of the lower protective sleeve (62), and the positioning assembly (63) includes a guide member (631). A positioning pin (632) is fixedly installed on the top surface of the guide member (631), and a return spring (633) is fixedly installed on the bottom surface of the guide member (631). The positioning pin (632) is slidably inserted in the bottom surface of the connecting buckle (611) through the guide member (631) and the return spring (633). The positioning assembly (63) and the connecting buckle (611) cooperate with each other.

3. The heat-insulated pipe for a heating network according to claim 1, characterized in that: Positioning strips (43) are fixedly installed on both sides of the upper protective shell (41) and the lower protective shell (42), and fixing pieces (44) are fixedly installed on both sides of the positioning strips (43). The upper and lower fixing pieces (44) on the same side of the upper protective shell (41) and the lower protective shell (42) are internally threaded with fixing buckles (45), and the fixing buckles (45) and the fixing pieces (44) cooperate with each other.

4. The heat-insulated pipe for a heating network according to claim 1, characterized in that: Evenly distributed injection holes (21) are provided above the surface of the outer protective layer (2), and the injection holes (21) cooperate with the thermal insulation layer (3).

5. The heat-insulated pipe for a heating network according to claim 3, characterized in that: Positioning plug-ins (431) are fixedly mounted on the bottom surfaces of the positioning strips (43) on both sides of the upper protective shell (41), and the positioning plug-ins (431) are slidably inserted into the top surfaces of the positioning strips (43) on both sides of the lower protective shell (42).

6. The heat-insulated pipe for a heating network according to claim 1, characterized in that: Evenly distributed bolts (51) are inserted into two flanges (5) on adjacent sides of the two pipe bodies (1), and nuts (52) are threadedly sleeved on the surfaces of the bolts (51), and the bolts (51) and nuts (52) cooperate with each other.

7. The heat-insulated pipe for a heating network according to claim 2, characterized in that: A connecting member (634) is fixedly mounted on one side of the surface of the guide member (631), and a pulling member (635) is fixedly mounted on one end of the connecting member (634). The pulling member (635) cooperates with the positioning pin (632) through the connecting member (634) and the guide member (631).

8. The heat-insulated pipe for a heating network according to claim 5, characterized in that: The top surfaces of the positioning bars (43) on both sides of the lower protective shell (42) are both provided with slots (432), and the positioning bars (43) are slidably inserted into the slots (432).

9. The heat-insulated pipe for a heating network according to claim 2, characterized in that: Damping grooves (621) are provided on both sides of the top surface of the lower protective sleeve (62), and the connecting buckle (611) is inserted into the damping grooves (621) for damping.

10. The heat-insulated pipe for a heating network according to claim 1, characterized in that: A support seat (11) is installed below the pipe body (1), and the support seat (11) and the surface of the lower protective shell (42) are in contact with each other.

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