A polyurethane insulation pipe foaming sealing device

Abstract

The utility model relates to the technical field of thermal insulation pipe processing, and discloses a polyurethane thermal insulation pipe foaming sealing device, comprising an upper clamp and a lower clamp, wherein the upper clamp and the lower clamp comprise an arc-shaped plate, an end plate is arranged at one end of the inner side of the arc-shaped plate, and the end plate is used to seal the space between an outer protective pipe and a working steel pipe, the upper clamp and the lower clamp are hingedly matched on one side, and matched on the other side through a locking assembly, and after the upper clamp and the lower clamp are closed, they are fixed to the outer side of the end of the outer protective pipe through the locking assembly; the upper clamp and the lower clamp of the utility model are arranged and fastened through the locking assembly, which not only realizes the function of sealing polyurethane, but also fixes the sealing device by the locking buckle, and at the same time, this device is not affected by the wall thickness of the outer protective pipe, and can be shared for outer protective pipes with different wall thicknesses, and has wider applicability.

Description

Technical Field

[0001] The utility model relates to the technical field of heat-insulating pipe processing, in particular to a polyurethane heat-insulating pipe foaming sealing device. Background Art

[0002] Polyurethane insulated pipes are currently developing rapidly in the thermal power market and chemical insulation due to their excellent insulation effect. Polyurethane insulated pipes are mainly composed of working steel pipes, polyurethane and outer protective pipes. During production, the working steel pipe is inserted into the outer protective pipe, and then the cavity ports between the working steel pipe and the outer protective pipe are sealed with sealing flanges at both ends, and finally polyurethane is poured for foaming.

[0003] During the production process, after using flanges to seal both ends, it is necessary to use an oil cylinder or other device to fix the sealing flange to prevent the thrust generated by the polyurethane foaming from pushing the sealing flange out of the pipe body. In addition, when processing and pouring more than two small-diameter polyurethane insulation pipes at the same time, due to a certain error in the length of the pipes, using one oil cylinder cannot fix the sealing flanges of each pipe, and the efficiency is slow. Moreover, for the same model of working steel pipe, when the wall thickness of the outer protective pipe changes, the size of the sealing flange also needs to be adjusted during processing, which has poor compatibility and low efficiency. Utility Model Content

[0004] In view of the shortcomings of the prior art, the purpose of the utility model is to provide a polyurethane insulation pipe foaming sealing device. The upper clamp and the lower clamp are set and fastened by a locking buckle assembly, which not only achieves the function of sealing the polyurethane, but also fixes the sealing device by the locking buckle. At the same time, this device is not affected by the wall thickness of the outer protective pipe, and can be shared for outer protective pipes with different wall thicknesses, and has a wider applicability.

[0005] In order to achieve the above purpose, the utility model is implemented through the following technical solutions:

[0006] A polyurethane insulated pipe foam sealing device comprises an upper clamp and a lower clamp, wherein the upper clamp and the lower clamp comprise an arc-shaped plate, an end plate is provided at one end of the inner side of the arc-shaped plate, and the end plate is used to seal the space between an outer protective pipe and a working steel pipe. The upper clamp and the lower clamp are hingedly matched on one side and matched on the other side through a locking assembly. After the upper clamp and the lower clamp are closed, they are fixed to the outer side of the end of the outer protective pipe through the locking assembly.

[0007] As a further implementation, the end plate is in a semicircular ring shape, and the outer periphery of the end plate is fixedly connected to the inner side of one end of the arc-shaped plate.

[0008] As a further implementation method, the radius of the circular hole surrounded by the end plates after the upper clamp and the lower clamp are closed is smaller than the radius of the working steel pipe.

[0009] As a further implementation manner, the radius of the arc-shaped plate is adapted to the outer diameter of the outer protective tube.

[0010] As a further implementation, the arc plate is semicircular, and the arc plates of the upper clamp and the lower clamp are closed to form a sleeve structure.

[0011] As a further implementation, one side of the arc-shaped plates of the upper clamp and the lower clamp is hinged via a connecting shaft.

[0012] As a further implementation method, a locking buckle seat is provided on the outer side surface of the other side of the arc plate of the lower clamp, and a locking plate is provided on the outer side surface of the arc plate of the upper clamp close to the locking buckle seat.

[0013] As a further implementation method, an opening is provided on the locking buckle seat, the locking buckle passes through the opening, the end of the locking buckle is connected to the locking seat plate, and the locking seat plate is provided with a locking bolt. After the locking buckle passes around the locking plate, the locking bolt is tightened and the locking bolt abuts the locking plate.

[0014] As a further implementation, the end plate is provided with an exhaust valve seat hole for installing the exhaust valve.

[0015] As a further implementation, the locking assembly is arranged at an intermediate position between the upper clamp and the lower clamp in the height direction.

[0016] The beneficial effects of the above utility model are as follows:

[0017] 1. The upper clamp and the lower clamp of the utility model are arranged and fastened by the locking buckle assembly, which not only realizes the function of sealing the polyurethane, but also fixes the sealing device by the locking buckle. At the same time, this device is not affected by the wall thickness of the outer protective tube, and can be shared for outer protective tubes with different wall thicknesses, and has wider applicability.

[0018] 2. The present invention utilizes upper and lower clamps to fix the tooling, each pipe does not affect each other, and does not require a cylinder to support the foaming sealing device, thereby realizing the convenience of processing multiple pipes at one time.

[0019] 3. The end plate of the present invention is provided with an exhaust valve seat hole. When polyurethane is foamed, exhaust is discharged through the exhaust valve seat hole, which can reduce raw material resistance, reduce polyurethane feed amount, reduce foaming cavity, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0021] Figure 1 It is a schematic diagram of the overall structure of the polyurethane insulation pipe foaming sealing device in the embodiment of the utility model;

[0022] Figure 2yes Figure 1 A schematic cross-sectional structure diagram of ;

[0023] Figure 3 It is a locking principle diagram of the locking buckle in the embodiment of the utility model.

[0024] In the figure: the distances or sizes between parts are exaggerated to show the positions of various parts, and the schematic diagram is for reference only.

[0025] Wherein: 1. upper fixture, 2. lower fixture, 3. connecting shaft, 4. locking buckle seat, 5. opening, 6. locking buckle, 7. locking seat plate, 8. locking plate, 9. locking bolt, 10. exhaust valve seat hole, 11. end plate, 12. arc plate. DETAILED DESCRIPTION

[0026] It should be noted that the following detailed descriptions are all illustrative and are intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0027] Embodiment 1

[0028] In a typical implementation of the present invention, reference is made to Figure 1 As shown, a polyurethane insulation pipe foam sealing device includes an upper clamp 1 and a lower clamp 2. The upper clamp 1 and the lower clamp 2 include an arc plate 12. An end plate 11 is provided at one end of the inner side of the arc plate 12. The end plate 11 is used to seal the space between the outer protective pipe and the working steel pipe. The upper clamp 1 and the lower clamp 2 are hinged on one side and matched on the other side through a locking assembly. After the upper clamp 1 and the lower clamp 2 are closed, they are fixed to the outside of the end of the outer protective pipe through the locking assembly.

[0029] The upper and lower clamps are clamped on the outer wall of the outer protective tube, which is not limited by the wall thickness of the outer protective tube. The outer protective tubes with different wall thicknesses can be shared, and the applicability is wider.

[0030] like Figure 1 and Figure 2 As shown, the main structures of the upper clamp 1 and the lower clamp 2 are the same, both of which include an arc plate 12, and an end plate 11 is provided at one end of the inner side of the arc plate 12. The arc plate 12 is semicircular, and after the two arc plates 12 of the upper and lower clamps are butt-jointed and closed, a sleeve-like structure can be formed. The arc plate 12 is used to cover the outer wall of the outer protective tube, and the inner diameter of the sleeve-like structure is adapted to the outer diameter of the outer protective tube.

[0031] The upper clamp 1 and the lower clamp 2 of this embodiment are hinged on one side by a connecting shaft 3, and cooperated on the other side by a locking assembly to achieve locking after the upper and lower clamps are closed. The radius of the arc plate needs to be adapted to the outer diameter of the outer protective tube.

[0032] The end plate 11 is used to seal the space between the outer protective tube and the working steel pipe. The end plate is welded to one end of the inner side of the arc plate 12 of the upper clamp 1 and the lower clamp 2. The end plate is semicircular, and the outer periphery of the end plate 11 is fixedly welded to the inner side of one end of the arc plate 12 as a whole.

[0033] like Figure 1 and Figure 2 As shown, when the upper clamp 1 and the lower clamp 2 are closed, the two arc-shaped plates 12 are butted together, and the inner side of the end plate 11 after the upper clamp 1 and the lower clamp 2 are closed forms a circular hole, and the radius of the circular hole should be smaller than the radius of the working steel pipe, that is, the dimension A is determined according to the processed working pipe.

[0034] The outer side surface of the arc plate 12 of the upper clamp 1 and the lower clamp 2 is hinged by the connecting shaft 3, so that the clamp can be opened and closed. A locking assembly is provided on the outer side surface of the arc plate away from the connecting shaft, and the upper clamp 1 and the lower clamp 2 are locked after closing.

[0035] The locking assembly of this embodiment includes a locking buckle seat 4, an opening 5, a locking buckle 6, a locking seat plate 7, a locking plate 8, and a locking bolt 9. After the upper clamp and the lower clamp are closed, they are fixed to the outside of the end of the outer protective tube through the locking assembly.

[0036] like Figure 1 As shown, a locking buckle seat 4 is provided on the outer side surface of the arc plate side of the lower clamp 2, and a locking plate 8 is provided on the outer side surface of the arc plate 12 of the upper clamp 1 on the side close to the locking buckle seat 4. An opening 5 is provided on the locking buckle seat 4, and a locking buckle 6 is arranged through the opening 5. The end of the locking buckle 6 is connected to the locking seat plate 7, and a locking bolt 9 is provided on the locking seat plate 7. After the locking buckle 6 passes around the locking plate 8, the locking plate 8 is located inside the locking buckle 6. The locking bolt 9 is tightened, and the locking bolt 9 can abut the locking plate 8 to achieve the locking of the upper clamp 1 and the lower clamp 2 after they are relatively closed.

[0037] Specifically, the locking buckle seat 4 of this embodiment is a plate-shaped structure, which is welded to the outer edge of the arc-shaped plate 12, and the locking buckle seat 4 is provided with an opening, which passes through the locking buckle seat 4. Figure 3 As shown, the locking buckle is U-shaped. After the locking buckle 6 passes through the opening 5 of the locking buckle seat 4, it is connected to the locking seat plate 7. The locking seat plate 7 is welded to the open end of the locking buckle 6, so that the locking buckle 6 will not fall off the locking buckle seat 4. The locking seat plate 7 is threaded with a locking bolt 9. When the upper clamp and the lower clamp are closed, the locking buckle is buckled on the outside of the locking plate, and then the locking bolt is tightened. The locking bolt presses against the surface of the locking plate, so that the upper clamp and the lower clamp are firmly locked together and will not fall off the outer protective tube. The locking assembly of this embodiment is arranged in the middle position of the upper clamp and the lower clamp in the height direction to ensure the stability of the force. It can be understood that the locking buckle 6 is U-shaped as a whole, but its main structure needs to be appropriately bent to meet the locking requirements of the upper and lower clamps.

[0038] An exhaust valve seat hole 10 is provided on the end plate for installing the exhaust valve. The number of the exhaust valve seat holes 10 is generally set according to the exhaust conditions during processing. According to the exhaust conditions during polyurethane foaming, multiple exhaust valve seat holes can be set to install the exhaust valve, which can reduce the resistance of the raw materials, reduce the amount of polyurethane feed, and reduce the foaming cavity.

[0039] Only one end of the arc-shaped plate of the upper and lower clamps of this embodiment is provided with an end plate, and the other end is not provided. The upper and lower clamps are used to be installed at the two ends of the outer protective tube. Therefore, the radius of the arc-shaped plate needs to be adapted to the radius of the outer protective tube, and the inner diameter size B of the sealing device is determined according to the outer protective tube to be produced and processed. The end plate is used to seal the annular opening between the working steel pipe and the outer protective tube. After the clamp is installed, polyurethane pouring can be carried out. The tooling of this embodiment will not shift to both ends when the polyurethane is foamed, so there is no need to use a cylinder or other device to support the sealing tooling, so that multiple sealing tooling can be installed at the same time during production and processing, and then the polyurethane pouring can be concentrated to improve production efficiency.

[0040] The sealing device of this embodiment can be clamped on the outer wall of the outer protective tube by the upper and lower clamps as long as the inner diameter of the clamp is compatible with the outer diameter of the outer protective tube. It is not restricted by the wall thickness of the outer protective tube and can be shared for outer protective tubes with different wall thicknesses, thus having wider applicability. The upper and lower clamps are used to fix the tooling so that each pipe does not affect each other, and there is no need for a cylinder to support the foaming sealing device, thus achieving the convenience of processing multiple pipes at one time.

[0041] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A polyurethane insulation pipe foaming sealing device, characterized in that: It includes an upper clamp and a lower clamp. The upper clamp and the lower clamp include an arc-shaped plate. An end plate is provided at one end of the inner side of the arc-shaped plate. The end plate is used to seal the space between the outer protective tube and the working steel pipe. The upper clamp and the lower clamp are hinged on one side and matched on the other side through a locking assembly. After the upper clamp and the lower clamp are closed, they are fixed to the outside of the end of the outer protective tube through the locking assembly.

2. A polyurethane thermal insulation pipe foaming sealing device according to claim 1, characterized in that: The end plate is in a semicircular shape, and the outer periphery of the end plate is fixedly connected to the inner side of one end of the arc-shaped plate.

3. A polyurethane thermal insulation pipe foaming sealing device according to claim 2, characterized in that: The radius of the circular hole surrounded by the end plates after the upper clamp and the lower clamp are closed is smaller than the radius of the working steel pipe.

4. The polyurethane thermal insulation pipe foaming sealing device according to claim 1, characterized in that: The radius of the arc-shaped plate is adapted to the outer diameter of the outer protective tube.

5. A polyurethane thermal insulation pipe foaming sealing device according to claim 4, characterized in that: The arc plate is semicircular, and the arc plates of the upper clamp and the lower clamp form a sleeve structure after being closed.

6. A polyurethane thermal insulation pipe foaming sealing device according to claim 5, characterized in that: One side of the arc-shaped plates of the upper clamp and the lower clamp is hinged through a connecting shaft.

7. A polyurethane thermal insulation pipe foaming sealing device according to claim 6, characterized in that: A locking buckle seat is provided on the outer side surface of the other side of the arc plate of the lower clamp, and a locking plate is provided on the outer side surface of the arc plate of the upper clamp close to the locking buckle seat.

8. A polyurethane thermal insulation pipe foaming sealing device according to claim 7, characterized in that: The locking buckle seat is provided with an opening, the locking buckle passes through the opening, the end of the locking buckle is connected to the locking seat plate, the locking seat plate is provided with a locking bolt, after the locking buckle passes around the locking plate, the locking bolt is tightened, and the locking bolt abuts against the locking plate.

9. The polyurethane thermal insulation pipe foaming sealing device according to claim 1, characterized in that: The end plate is provided with an exhaust valve seat hole for installing the exhaust valve.

10. A polyurethane thermal insulation pipe foaming sealing device according to claim 9, characterized in that: The locking assembly is arranged at a middle position between the upper clamp and the lower clamp in the height direction.

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