Segmented perfusion foamed steam pipe

Abstract

The utility model discloses a kind of steam heat preservation pipes of segmented perfusion foaming, including the core pipe, heat preservation sleeve and outer sleeve sequentially arranged from inside to outside, it is filler between heat preservation sleeve and outer sleeve, and foaming material is filled in filler;Partition frame is arranged in filler, and partition frame divides filler into multiple filling sections, and multiple perfusion channels are also formed in partition frame, and each filling section is connected with outside at least by one perfusion channel, and foaming material can be filled into each filling section by each perfusion channel respectively. The partition frame includes several partition rings distributed along the length direction of core pipe, and several partition rings divide filler into multiple filling sections along the length direction of core pipe, and the inside and outside of partition ring are respectively close to heat preservation sleeve and outer sleeve;Partition frame also includes several perfusion pipes, and the inside of perfusion pipe forms the perfusion channel. The utility model can improve the filling uniformity of foaming structure in pipeline.

Description

Technical Field

[0001] This utility model relates to the field of steam insulation pipes, and in particular to a segmented injection foaming steam insulation pipe. Background Technology

[0002] In steam insulation pipes, the polyurethane foam filling layer is a core component, integrating multiple functions such as high-efficiency insulation, reliable waterproofing and moisture resistance, enhanced mechanical strength, and extended pipe life. It is a key technology for ensuring the safe, efficient, economical, and long-life operation of high-temperature steam pipe networks. Because the cavity between the inner and outer pipes of a steam insulation pipe is long and narrow, directly injecting polyurethane foam material between them can easily lead to uneven filling. Summary of the Invention

[0003] Purpose of the invention: In order to overcome the shortcomings of the existing technology, this utility model provides a segmented injection foaming steam insulation pipe. A separator is set to divide the inside of the pipe into multiple filling sections, and each filling section is filled with bubble material through the injection channel in the separator to improve the filling uniformity of the foaming structure inside the pipe.

[0004] Technical solution: To achieve the above objectives, this utility model provides a segmented foamed steam insulation pipe, comprising a core tube, an insulation sleeve, and an outer sleeve arranged sequentially from the inside out. A filling layer is located between the insulation sleeve and the outer sleeve, and the filling layer is filled with foaming material. A partition frame is provided within the filling layer, dividing the filling layer into multiple filling sections. Multiple injection channels are also formed within the partition frame, and each filling section is connected to the outside through at least one injection channel. The foaming material can be injected into each filling section through each injection channel.

[0005] Furthermore, the separator includes several separator rings distributed along the length of the core tube, which divide the filling layer into multiple filling sections along the length of the core tube. The inner and outer sides of the separator rings are respectively attached to the insulation sleeve and the outer sleeve. The separator also includes several injection pipes, the inside of which forms the injection channel. The injection pipes are provided with injection ports that connect to the injection channel, and each injection port is located in a different filling section.

[0006] Furthermore, there is only one injection channel within a single injection tube.

[0007] Furthermore, the infusion tube is provided with a partition section, which divides the interior of a single infusion tube into two infusion channels. The two infusion channels in a single infusion tube have their own infusion ports, and the two infusion ports on a single infusion tube are located in different filling sections.

[0008] Furthermore, the separating ring is provided with vent holes, and adjacent filling sections can be connected through the vent holes.

[0009] Furthermore, the injection tube extends along the length of the core tube, passes through each of the partition rings in sequence, and connects the partition rings into a whole.

[0010] Furthermore, several of the injection tubes are circumferentially distributed within the filling layer.

[0011] Furthermore, the foaming material is a polyurethane foaming material.

[0012] Beneficial effects: The beneficial effects of the segmented injection foaming steam insulation pipe of this utility model are as follows:

[0013] 1) The filling layer inside the pipe is divided into multiple filling sections by a partition ring, and then foaming material is filled into each filling section through a filling pipe. The filling uniformity of the foaming structure inside the pipe is improved by segmented filling.

[0014] 2) The injection tube has a partition section that divides the inside of the injection tube into two injection channels. The two injection channels are connected to different filling sections, thereby reducing the number of injection tubes and lowering the cost. Attached Figure Description

[0015] Appendix Figure 1 This is a schematic diagram of the structure of a steam insulation pipe;

[0016] Appendix Figure 2 This is a schematic diagram of the planar structure of the divider;

[0017] Appendix Figure 3 This is a schematic diagram of the three-dimensional structure of the divider. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings.

[0019] As attached Figures 1 to 3 The aforementioned segmented foamed steam insulation pipe includes a core pipe 1, an insulation sleeve 2, and an outer sleeve 3 arranged sequentially from the inside out. A filling layer 4 is located between the insulation sleeve 2 and the outer sleeve 3, and the filling layer 4 is filled with foamed material to improve the insulation performance of the steam insulation pipe. Specifically, the foamed material is polyurethane foam.

[0020] Because the cavity between the insulation sleeve 2 and the outer sleeve 3 is long and narrow, directly injecting polyurethane foam material between them can easily lead to uneven filling. Therefore, in this invention, a separator 5 is provided within the filling layer 4, dividing it into multiple filling sections 6. Multiple injection channels 7 are also formed within the separator 5, and each filling section 6 is connected to the outside through at least one injection channel 7. The foam material can be injected into each filling section 6 through each injection channel 7. Since each filling section 6 is filled separately, the density difference of the polyurethane foam material within a single filling section 6 is smaller, thereby improving the uniformity of the foam structure filling within the pipe.

[0021] Specifically, the separator 5 includes several separator rings 8 distributed along the length of the core tube 1. These separator rings 8 divide the filling layer 4 into multiple filling sections 6 along the length of the core tube 1. The inner and outer sides of the separator rings 8 are respectively attached to the insulation sleeve 2 and the outer sleeve 3. Besides separating the filling layer 4, the separator rings 8 also provide support between the insulation sleeve 2 and the outer sleeve 3, keeping them concentric. The separator 5 also includes several injection tubes 9 extending along the length of the core tube 1. The injection tubes 9 pass through each separator ring 8 sequentially, connecting the separator rings 8 into a single unit. The injection tubes 9 are circumferentially distributed within the filling layer 4. An injection channel 7 is formed inside each injection tube 9. Injection ports 10 connecting to the injection channel 7 are opened on the tube wall of each injection tube 9. Each injection port 10 is located within a specific filling section 6, and the other end opening of the injection channel 7 is located at the end of the injection tube 9.

[0022] In one embodiment, a single infusion tube 9 contains only one infusion channel 7, and the infusion tube 9 has an opening at one end connected to the infusion channel 7. Each infusion tube 9 corresponds to a filling section 6.

[0023] In another embodiment, a partition 11 is provided inside the infusion tube 9, which divides the interior of a single infusion tube 9 into two infusion channels 7. Each of the two infusion channels 7 within a single infusion tube 9 has its own infusion port 10, and the two infusion ports 10 on the single infusion tube 9 are located within different filling sections 6. (See attached...) Figure 2 As shown, the injection pipe 9 has openings at both ends, and the two openings are respectively connected to two injection channels 7 inside the injection pipe 9. When foaming material is injected from both ends of the injection pipe 9, the foaming material will enter different filling sections 6. This reduces the number of injection pipes 9 required on the separator 5 and lowers the cost.

[0024] The separating ring 8 has vent holes 12, allowing adjacent filling sections 6 to connect. When foaming material is injected into a filling section 6, air inside the filling section 6 will be discharged through the vent holes 12. If the vent holes 12 are not provided, the gas cannot be discharged, and voids are easily generated when the filling section 6 is filled with foaming material.

[0025] Combined with appendix Figure 1 The filling method of the foaming material of this utility model is described as follows: A separator 5 is placed between the insulation sleeve 2 and the outer sleeve 3, thereby dividing the filling layer 4 into multiple filling sections 6. During filling, foaming material is sequentially injected into each filling section 6 along the length of the core tube 1, for example, from left to right or from right to left, so that air in each filling section 6 can be discharged sequentially through the vent holes 12 to the next filling section 6. If the filling sections 6 at both ends are filled first, the gas in the middle filling section 6 cannot be discharged, easily leading to voids. Furthermore, within a single filling section 6, the injection port 10 and the vent hole 12 are preferably located at opposite ends of the filling section 6, which further facilitates gas discharge. After filling each filling section 6, temporary end caps 13 are installed at both ends of the steam insulation pipe. The temporary end cap 13 has at least two openings through which foaming material can be poured, and air can be vented through the other opening. After the foaming material is poured into the cavity between the temporary end cap 13 and the partition ring 8, the foaming material can completely cover the partition frame 5, and then the temporary end cap 13 can be removed.

[0026] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A segmented injection foaming steam insulation pipe, characterized in that: The system includes a core tube (1), an insulation sleeve (2), and an outer sleeve (3) arranged sequentially from the inside to the outside. There is a filling layer (4) between the insulation sleeve (2) and the outer sleeve (3). The filling layer (4) is filled with foam material. A partition frame (5) is provided in the filling layer (4). The partition frame (5) divides the filling layer (4) into multiple filling sections (6). Multiple injection channels (7) are also formed in the partition frame (5). Each filling section (6) is connected to the outside through at least one injection channel (7). The foam material can be injected into each filling section (6) through each injection channel (7).

2. The segmented injection foaming steam insulation pipe according to claim 1, characterized in that: The separator (5) includes several separator rings (8) distributed along the length of the core tube (1). The separator rings (8) divide the filling layer (4) into multiple filling sections (6) along the length of the core tube (1). The inner and outer sides of the separator rings (8) are respectively attached to the insulation sleeve (2) and the outer sleeve (3). The separator (5) also includes several injection pipes (9). The injection pipes (9) form the injection channel (7) inside. The injection pipes (9) are provided with injection ports (10) that connect to the injection channel (7). Each injection port (10) is located in each filling section (6).

3. The segmented injection foaming steam insulation pipe according to claim 2, characterized in that: There is only one injection channel (7) in a single injection tube (9).

4. A segmented injection foaming steam insulation pipe according to claim 2, characterized in that: The injection tube (9) is provided with a partition (11), which divides the interior of a single injection tube (9) into two injection channels (7). The two injection channels (7) in a single injection tube (9) have their own injection ports (10), and the two injection ports (10) on a single injection tube (9) are located in different filling sections (6).

5. A segmented injection foaming steam insulation pipe according to claim 2, characterized in that: The separating ring (8) is provided with a vent hole (12), and adjacent filling sections (6) can be connected through the vent hole (12).

6. A segmented injection foaming steam insulation pipe according to claim 2, characterized in that: The injection tube (9) extends along the length of the core tube (1), and the injection tube (9) passes through each of the partition rings (8) in sequence, connecting each partition ring (8) into a whole.

7. A segmented injection foaming steam insulation pipe according to claim 6, characterized in that: Several of the injection tubes (9) are circumferentially distributed within the filling layer (4).

8. A segmented injection foaming steam insulation pipe according to any one of claims 1 to 7, characterized in that: The foaming material is polyurethane foam.

Images