Spiral steel pipe heat preservation layer filling device

Abstract

Provided is a spiral steel pipe heat preservation layer filling device. The problems that foam flows to all positions between an outer sheath and a lining pipe through the foam, the mode is low in filling efficiency, and meanwhile, due to the low filling efficiency, part of the foam is often hardened, and gaps are formed in the filling process of the foam are solved. The device comprises a lining tube and an outer sheath, the lining tube and the outer sheath are supported by a support ring, and the device is characterized in that a plurality of bubble spraying rings are sleeved on the lining tube along the length direction, a drainage tube is fixed on each bubble spraying ring, and each drainage tube is connected to a confluence head; the bubble spraying ring is of a circular ring body structure, a plurality of bubble spraying heads are arranged on the circular ring end face of the bubble spraying ring, and a plurality of fins which are evenly distributed are fixed to the inner circular ring face of the bubble spraying ring. The device is used for filling the heat-insulating layer of the spiral steel pipe.

Description

Technical Field

[0001] This utility model relates to a spiral steel pipe insulation layer filling device. Background Technology

[0002] When manufacturing spiral steel pipes for heating, an outer sheath needs to be fitted onto an inner liner pipe, and multiple sets of support rings are installed on the inner liner pipe. These support rings effectively support the outer sheath, ensuring the concentricity between the outer sheath and the inner liner pipe. Then, end caps are fitted onto the inner liner pipe to seal the ends of the outer sheath. After sealing, an injection port needs to be opened on the outer sheath, and foaming liquid is injected into the space between the outer sheath and the inner liner pipe using a foaming gun to form an insulation layer. However, because this method relies on the foam to flow through the insulation layer between the outer sheath and the inner liner pipe after foaming, it often results in the foam hardening and causing pipe jamming due to excessive foaming time and air humidity. Furthermore, relying on the foam itself to flow to various parts between the outer sheath and the inner liner pipe results in low filling efficiency, and the low filling efficiency often leads to some foam hardening, creating gaps in the filling. Utility Model Content

[0003] In order to overcome the shortcomings of the prior art, the purpose of this utility model is to provide a spiral steel pipe insulation layer filling device to overcome the defects in the prior art.

[0004] To achieve the above objectives, this utility model provides a spiral steel pipe insulation layer filling device, which comprises: an inner lining pipe and an outer sheath, wherein the inner lining pipe and the outer sheath are supported by a support ring, and multiple foaming rings are sleeved on the inner lining pipe along the length direction, each foaming ring is fixed with a drain pipe, and each drain pipe is connected to a manifold.

[0005] The bubble ring is a circular ring structure with multiple bubble nozzles on its circular end face, and multiple fins are evenly distributed on the inner circular surface of the bubble ring.

[0006] The aforementioned spiral steel pipe insulation layer filling device has a stepped circular structure for the manifold head, and the bottom of the manifold head has four joints.

[0007] The aforementioned spiral steel pipe insulation layer filling device uses plastic fins.

[0008] The aforementioned spiral steel pipe insulation layer filling device, wherein the drainage pipe is a rigid hollow plastic pipe.

[0009] The beneficial effects of this utility model are:

[0010] 1. This utility model has multiple foaming rings fitted on the inner lining tube. The foaming liquid is guided into each foaming ring through the drainage pipe and sprayed out through the foaming head on the foaming ring into the gap between the outer sheath and the inner lining tube. This can ensure the uniformity of foaming and improve the foaming efficiency, while preventing the tube from getting stuck.

[0011] 2. The inner ring of the bubble spraying ring of this utility model has multiple fins fixed on it. These fins can be used to fit the bubble spraying ring onto the inner liner tube and keep it fixed. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model;

[0013] Figure 2 for Figure 1 Enlarged view of part A;

[0014] Figure 3 for Figure 1 BB section sectional view;

[0015] Figure 4 This is the front view of the bubble ring;

[0016] Figure 5 This is a side view of the bubble ring;

[0017] Figure 6 This is a schematic diagram of the internal structure of the bubble ring;

[0018] Figure 7 This is the front view of the bus head;

[0019] Figure 8 This is a top view of the bus head;

[0020] Figure 9 This is a bottom view of the bus head;

[0021] The annotations in the attached figures are explained as follows:

[0022] In the diagram: 1. Inner liner; 2. Outer sheath; 3. Drainage tube; 4. Support ring; 5. Bubble spraying ring; 6. Injection port; 7. Manifold; 8. Circular ring; 9. Fin; 10. Bubble spraying head; 11. Connector; 12. Trapezoidal wooden block; 13. Circular tie rod. Detailed Implementation

[0023] In order to further understand the structure, features and other objectives of this utility model, the following detailed description is provided in conjunction with the accompanying drawings. The embodiments described in the drawings are only used to illustrate the technical solutions of this utility model and are not intended to limit this utility model.

[0024] Reference Figures 1-9A spiral steel pipe insulation layer filling device, comprising: an inner lining pipe 1 and an outer sheath 2, wherein the inner lining pipe and the outer sheath are supported by a support ring 4, and the support ring effectively supports the outer sheath to ensure the concentricity between the outer sheath and the inner lining pipe.

[0025] The support ring includes multiple trapezoidal wooden blocks 12. The multiple trapezoidal wooden blocks are arranged into a circular ring structure by circular ring tie rods 13 and are fitted onto the inner lining tube. Multiple support rings are arranged along the length of the inner lining tube. After the outer sheath is fitted onto the inner lining tube, it is supported by multiple support rings. This support ring is a form of existing technology and will not be described in detail here.

[0026] The inner liner tube is fitted with multiple bubble rings 5 ​​along its length. Each bubble ring is fixed with a drain tube 3. Each drain tube is connected to a manifold 7. The drain tube is a rigid hollow plastic tube.

[0027] The bubble ring is a circular ring 8 structure with multiple bubble nozzles 10 on its circular end face. Multiple fins 9 are evenly distributed on the inner circular surface of the bubble ring. The fins are plastic fins.

[0028] The aforementioned spiral steel pipe insulation layer filling device has a stepped circular structure for the manifold head, and the bottom of the manifold head has four connectors 11.

[0029] Working Principle: In use, multiple foaming rings are fitted onto the inner liner. Two foaming rings are positioned on the left side of the inner liner's center, with the foam nozzles on each ring facing the left end of the inner liner. Two foaming rings are positioned on the right side of the inner liner's center, with the foam nozzles on each ring facing the right end of the inner liner. The vertical ends of four drainage tubes are then inserted into the connector of the manifold. After connecting the drainage tubes of all four foaming rings to the connector, an injection port corresponding to the manifold's position is opened on the outer liner. The nozzle of the injection gun is inserted into the manifold through the injection port. By activating the foaming equipment, the foaming liquid enters the manifold through the foaming gun and is drained through the four drainage tubes connected to the manifold, thus promoting foaming. The foaming solution simultaneously enters four drainage tubes, flows along the drainage tubes and then enters the foaming rings. It is then sprayed out through the foaming nozzles on the rings, where the foam will expand. By setting multiple foaming rings, the insulation layer filling area of ​​the inner liner tube is divided into multiple sections, ensuring the efficiency of foaming. At the same time, multiple foaming nozzles can evenly spray the foaming solution into the gap between the inner liner tube and the outer sheath, ensuring uniform foaming. After the entire gap between the inner liner tube and the outer sheath is filled with foam, the foam will flow out along the injection port. At this point, it can be determined that the foaming is complete. The multiple foaming rings and drainage tubes are always located in the gap between the outer sheath and the inner liner tube. During foaming, the foaming rings and drainage tubes are surrounded by the foaming solution and do not need to be removed.

[0030] It should be stated that the above-described utility model content and specific embodiments are intended to demonstrate the practical application of the technical solution provided by this utility model, and should not be construed as limiting the scope of protection of this utility model. Those skilled in the art can make various modifications, equivalent substitutions, or improvements within the spirit and principles of this utility model. The scope of protection of this utility model is determined by the appended claims.

Claims

1. A spiral steel pipe insulation layer filling device, comprising: The inner liner and the outer sheath are supported by a support ring. The inner liner is characterized by having a plurality of bubble rings fitted along its length, each bubble ring having a fixed drain pipe, and each drain pipe being connected to a manifold. The bubble ring is a circular ring structure with multiple bubble nozzles on its circular end face, and multiple fins are evenly distributed on the inner circular surface of the bubble ring.

2. The spiral steel pipe insulation layer filling device as described in claim 1, characterized in that, The manifold has a stepped circular structure, and the bottom of the manifold has four connectors.

3. The spiral steel pipe insulation layer filling device as described in claim 2, characterized in that, The fins are plastic fins.

4. The spiral steel pipe insulation layer filling device as described in claim 3, characterized in that, The drainage tube is a rigid hollow plastic tube.

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