PCCP (prestressed concrete cylinder pipe) anti-freezing structure

Abstract

The utility model discloses a PCCP (prestressed concrete cylinder pipe) anti-freezing structure which comprises an inner pipe, a thin steel cylinder and an outer pipe, the thin steel cylinder is fixedly sleeved on the surface of the inner pipe, the outer pipe is poured on the surface of the thin steel cylinder to form a PCCP, a plurality of heat preservation grooves are evenly arranged on the outer surface of the inner pipe, heating pipes are placed in the heat preservation grooves, the heating pipes are flexible pipes, and the outer pipe is connected with the thin steel cylinder. The thin steel cylinder is connected to the outer surface of the inner pipe in a sleeving mode to protect the heating pipe, the outer pipe is formed by pouring foamed concrete, and bubble holes are densely distributed in the outer pipe. In order to deal with anti-freezing measures of the pipeline, the crisscrossed heat preservation grooves are formed in the inner pipe of the pipeline, the heating pipes are arranged in the heat preservation grooves, heat is provided for the inner pipe through the heating pipes, and therefore liquid in the pipeline can be effectively prevented from being frozen, an outer pipe of an existing PCCP is made of foamed concrete materials, and the outer pipe of the existing PCCP is made of foamed concrete materials. The inner portion of the outer pipe made of foamed concrete is porous, so that the heat transmission rate is reduced, and a good heat preservation effect is achieved.

Description

Technical Field

[0001] The utility model belongs to pipeline antifreeze technology, in particular to a PCCP pipeline antifreeze structure. Background Art

[0002] PCCP pipe, also known as prestressed concrete cylinder pipe, refers to a high-strength concrete pipe core with a steel cylinder wrapped around a circumferential prestressed steel wire. Common PCCP pipe joints are mostly exposed and are prone to freezing in winter. Once the joints freeze, the volume of water inside will increase, which will not only block the pipe, but also cause the joints to expand and be damaged.

[0003] Chinese utility model patent CN220647199U discloses a PCCP pipe joint antifreeze structure, which has two arc blocks movably sleeved on the pipe joint. The shapes of the two arc blocks themselves can fit the pipe joint well. Pipe joints of different sizes are suitable for different types of arc blocks. The front surfaces of the two arc blocks are fixedly connected to the junction box, and the left surfaces of the junction box are fixedly connected to the connector. The opposite surfaces of the two arc blocks are provided with equidistant arc grooves, and the arc grooves are movably clamped with heating tapes. The heating tapes are fixedly connected to the connector. The heating tapes can fit with the pipe joint when the two arc blocks are merged. The heating tapes are connected to the power supply through the junction box. When current flows through the heating coil, heat is generated and transferred to the pipe joint to heat it. The overall structure is simple.

[0004] In the prior art, only the weak joints of the pipeline are usually considered, so heating is only set at the joints of the pipeline. However, since most PCCP pipelines are exposed to the outside, especially in high-altitude and cold areas, the pipelines are more prone to internal overall freezing. Utility Model Content

[0005] The purpose of this section is to summarize some aspects of the embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and in the abstract and title of the utility model to avoid obscuring the purpose of this section, the abstract and the title of the utility model, and such simplifications or omissions shall not be used to limit the scope of the present invention.

[0006] In order to solve the above problems, the present invention adopts the following technical solutions.

[0007] A PCCP pipeline antifreeze structure includes an inner pipe, a thin steel cylinder and an outer pipe. The thin steel cylinder is fixedly sleeved on the surface of the inner pipe, and the outer pipe is cast on the surface of the thin steel cylinder to form a PCCP pipeline. The outer surface of the inner pipe is evenly provided with multiple insulation grooves, and a heating pipe is placed inside the insulation groove. The heating pipe is a hose. The thin steel cylinder is sleeved on the outer surface of the inner pipe to protect the heating pipe. The outer pipe is cast with foamed concrete, and the inside of the outer pipe is densely covered with bubble holes.

[0008] Furthermore, the insulation tanks are divided into two groups, one of which is opened at equal intervals along the length of the inner tube, and the other group is opened at equal intervals in a circular manner. The two groups of insulation tanks are opened on the outer surface of the inner tube in a staggered manner in terms of longitude and latitude, and the heating pipe is placed in the insulation tanks opened along the length of the inner tube.

[0009] Furthermore, the heating pipe is electrically heated and is provided with electric energy by an external power supply. The diameter of the heating pipe is smaller than the opening width and opening depth of the insulation tank.

[0010] Furthermore, both ends of the PCCP pipe are provided with through holes connected to the insulation tank, and both ends of the heating pipe are placed in the through holes. When multiple PCCP pipes are docked, the heating pipes in adjacent PCCP pipes are connected into a whole using a connector.

[0011] Furthermore, one end of the outer tube is integrally connected with a plug interface, the thickness of the plug interface is less than the thickness of the PCCP pipe, and the other end of the outer tube is provided with a plug groove, the outer diameter of the plug groove is equal to the inner diameter of the plug interface.

[0012] Furthermore, clamps are integrally cast on the outer surfaces of both ends of the outer pipe, and multiple connection holes are opened in a circular pattern on the clamps. When multiple PCCP pipes are docked, bolts are used to pass through the connection holes of the clamps on two adjacent outer pipes for connection.

[0013] Furthermore, prestressed steel wires are wrapped around the surface of the PCCP pipe, a mortar protective layer is provided on the surface of the prestressed steel wires, and an asphalt coating is sprayed on the surface of the mortar protective layer.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] (1) In order to take anti-freezing measures for pipelines, the present invention provides crisscross insulation grooves on the inner pipe of the pipeline, and a heating pipe is built into the insulation groove. The heating pipe provides heat to the inner pipe, thereby effectively preventing the liquid inside the pipeline from freezing. The present invention discloses that the heating pipe is an electric heating pipe. In actual use, a hollow copper pipe can also be used as the heating pipe, which has a circulatory heating liquid built in. The inner pipe is heated by heating, thereby realizing two ways to heat the inner pipe.

[0016] (2) In order to further prevent the pipeline from freezing, the outer tube of the existing PCCP pipeline is made of foamed concrete material. The outer tube made of foamed concrete is porous inside. The porous material is filled with a large amount of air or other gas pores. The thermal conductivity of gas is much lower than that of solid material. It is difficult for heat to be effectively transferred through the collision between gas molecules. Heat must pass through countless tiny gas channels, which extends the heat conduction path and reduces the heat transfer rate, thereby achieving a good thermal insulation effect. At the same time, the still air in the pores acts as a good insulating layer, and natural convection does not occur, which further reduces the total heat passing through the material.

[0017] (3) Furthermore, in order to install the heating pipe, the present invention provides crisscross insulation grooves on the surface of the inner pipe. The opening of the insulation grooves reduces the contact area between the inner pipe and the thin steel cylinder, thereby reducing the area of the external low temperature transmitted to the inner pipe, and thus can also play a role in insulation to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The PCCP pipeline three-dimensional structure in this utility model Figure 1 .

[0019] Figure 2 The PCCP pipeline three-dimensional structure in this utility model Figure 2 .

[0020] Figure 3 This is a cross-sectional view of the PCCP pipeline in this utility model.

[0021] Figure 4 For this utility model Figure 3 A partial enlarged view of the pipeline section at point A.

[0022] Figure 5 This is an exploded view of the PCCP pipeline in this utility model.

[0023] The corresponding relationship between the labels and component names in the figures is as follows:

[0024] 101, inner tube; 1011, plug interface; 1012, plug slot; 1013, insulation slot; 1014, heating tube; 102, thin steel tube; 103, outer tube; 1031, clamp; 1032, bubble hole. DETAILED DESCRIPTION

[0025] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below with reference to the accompanying drawings.

[0026] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0027] Secondly, the term "one embodiment" or "embodiment" herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in various places throughout this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments. The present invention provides the following embodiments.

[0028] See Figure 5 This is an exploded view of the PCCP pipe antifreeze structure in this embodiment. The PCCP pipe antifreeze structure in this embodiment includes an inner pipe 101, a thin steel cylinder 102 and an outer pipe 103. The thin steel cylinder 102 is fixedly sleeved on the surface of the inner pipe 101, and the outer pipe 103 is cast on the surface of the thin steel cylinder 102 to form a PCCP pipe. This is the structure of the existing PCCP pipe. The antifreeze structure in the present invention is directly set on the PCCP pipe. Therefore, the existing structure of the PCCP pipe must be disclosed so that the antifreeze structure can be fully disclosed. At the same time, in order to improve the strength of the PCCP pipe, prestressed steel wire is wrapped around the surface of the PCCP pipe in this embodiment. A mortar protective layer is provided on the surface of the prestressed steel wire, and an asphalt coating is sprayed on the surface of the mortar protective layer.

[0029] See Figure 5 In this embodiment, a plurality of insulation grooves 1013 are evenly provided on the outer surface of the inner tube 101, and a heating pipe 1014 is placed inside the insulation groove 1013. The thin steel tube 102 is sleeved on the outer surface of the inner tube 101 to protect the heating pipe 1014. In this embodiment, the heating pipe 1014 provides heat to the inner tube 101, thereby effectively preventing the liquid inside the pipeline from freezing. The heating pipe 1014 of the utility model is electrically heated and provides electricity through an external power supply. Furthermore, in actual use, a hollow copper tube can also be used as the heating tube 1014, with a built-in recyclable heating liquid, and the inner tube 101 is heated by heating, thereby realizing two ways to heat the inner tube 101.

[0030] Continue reading Figure 5The insulation grooves 1013 in this embodiment are divided into two groups, one of which is equidistantly opened along the length direction of the inner tube 101, and the other group is equidistantly opened in a circular manner. The two groups of insulation grooves 1013 are staggered on the outer surface of the inner tube 101 in longitude and latitude, and the heating pipe 1014 is placed in the insulation grooves 1013 opened along the length direction of the inner tube 101. In this embodiment, the insulation grooves 1013 opened along the length direction of the inner tube 101 can be used as installation grooves for the heating pipe 1014, and the insulation grooves 1013 opened in a circular manner and equidistantly reduce the contact area between the inner tube 101 and the thin steel cylinder 102, thereby reducing the area of external low temperature transferred to the inner tube 101, and thus can also play a heat preservation role to a certain extent. Furthermore, in order to reduce the heat of the heating pipe 1014 directly transferred to the thin steel cylinder 102 and quickly lost to the outside, the diameter of the heating pipe 1014 in this embodiment is smaller than the opening width and opening depth of the insulation groove 1013.

[0031] It is worth noting that in order to address the disadvantage that after multiple PCCP pipes are docked, the internal heating pipes 1014 cannot be connected into a whole, thereby resulting in the heating pipes 1014 being unable to be connected to the same heating source, this embodiment provides through holes at both ends of the PCCP pipe that are connected to the insulation tank 1013, and the two ends of the heating pipe 1014 are placed in the through holes. When multiple PCCP pipes are docked, the heating pipes 1014 in adjacent PCCP pipes are connected into a whole using a connector. In order to prevent the connection of the heating pipe 1014 from blocking the docking of the PCCP pipes, this embodiment designs the heating pipe 1014 into a hose, so that after the heating pipe 1014 is connected, it can be inserted into the insulation tank 1013 through the through hole, avoiding the connection of the heating pipe 1014 protruding from the end of the PCCP pipe and hindering the connection between the PCCP pipes.

[0032] See Figure 3 and Figure 4 In this embodiment, the outer tube 103 is cast with foamed concrete. The outer tube 103 is densely covered with air bubbles 1032. In this embodiment, the outer tube 103 made of foamed concrete is porous. The porous material is filled with a large amount of air or other gas pores. The thermal conductivity of gas is much lower than that of solid materials. It is difficult for heat to be effectively transferred through the collision between gas molecules, thereby achieving a good thermal insulation effect. For further reference, Figure 1 and Figure 2In this embodiment, one end of the outer tube 103 is integrally connected with an insertion port 1011, the thickness of the insertion port 1011 is less than the thickness of the PCCP pipe, and the other end of the outer tube 103 is provided with an insertion groove 1012, the outer diameter of the insertion groove 1012 is equal to the inner diameter of the insertion port 1011. When multiple PCCP pipes are connected, the insertion groove 1012 of one PCCP pipe is connected to the insertion port 1011 of another PCCP pipe. The outer surfaces of both ends of the outer tube 103 are integrally cast with a clamp 1031, and the clamp 1031 is circumferentially provided with a plurality of connection holes. When multiple PCCP pipes are connected, bolts are used to pass through the connection holes of the clamps 1031 on two adjacent outer tubes 103 to connect them.

[0033] The above content is a further detailed description of the present invention in combination with specific implementation methods. It cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, they can make several simple deductions or substitutions without departing from the concept of the present invention, which should be regarded as falling within the scope of protection determined by the claims submitted for the present invention.

Claims

1. A PCCP pipeline antifreeze structure, comprising an inner pipe (101), a thin steel cylinder (102), and an outer pipe (103), wherein the thin steel cylinder (102) is fixedly sleeved on the surface of the inner pipe (101), and the outer pipe (103) is cast on the surface of the thin steel cylinder (102) to form a PCCP pipeline. Its characteristics are: The outer surface of the inner tube (101) is evenly provided with a plurality of heat-insulating grooves (1013), and a heating pipe (1014) is placed inside the heat-insulating grooves (1013). The heating pipe (1014) is a hose. The thin steel tube (102) is sleeved on the outer surface of the inner tube (101) to protect the heating pipe (1014). The outer tube (103) is cast using foamed concrete, and the interior of the outer tube (103) is densely covered with bubble holes (1032).

2. The PCCP pipeline antifreeze structure according to claim 1, characterized in that: The heat preservation grooves (1013) are divided into two groups, one of which is opened at equal intervals along the length direction of the inner tube (101), and the other group is opened at equal intervals in a circular manner. The two groups of heat preservation grooves (1013) are opened on the outer surface of the inner tube (101) in a staggered manner in terms of longitude and latitude. The heating tube (1014) is placed in the heat preservation grooves (1013) opened along the length direction of the inner tube (101).

3. The PCCP pipeline antifreeze structure according to claim 1, characterized in that: The heating pipe (1014) is electrically heated and is provided with electric energy by an external power supply. The diameter of the heating pipe (1014) is smaller than the opening width and opening depth of the heat preservation tank (1013).

4. The PCCP pipeline antifreeze structure according to claim 1, characterized in that: Both ends of the PCCP pipe are provided with through holes connected to the insulation tank (1013), and both ends of the heating pipe (1014) are placed in the through holes. When multiple PCCP pipes are docked, the heating pipes (1014) in adjacent PCCP pipes are connected into a whole using a connector.

5. The PCCP pipeline antifreeze structure according to claim 1, characterized in that: One end of the outer tube (103) is integrally connected with an inserting port (1011), the thickness of the inserting port (1011) is less than the thickness of the PCCP pipe, and the other end of the outer tube (103) is provided with an inserting groove (1012), the outer diameter of the inserting groove (1012) being equal to the inner diameter of the inserting port (1011).

6. The PCCP pipeline antifreeze structure according to claim 1, characterized in that: Clamps (1031) are integrally cast on the outer surfaces of both ends of the outer tube (103), and a plurality of connection holes are circumferentially opened on the clamps (1031). When multiple PCCP pipes are butted together, bolts are used to pass through the connection holes of the clamps (1031) on two adjacent outer tubes (103) for connection.

7. The PCCP pipeline antifreeze structure according to claim 1, characterized in that: The surface of the PCCP pipe is wound with prestressed steel wires, the surface of the prestressed steel wires is provided with a mortar protective layer, and the surface of the mortar protective layer is sprayed with an asphalt coating.

Images