Pipe head protection mechanism for pressure-resistant polyurethane thermal insulation pipe

Abstract

The utility model provides a pipe head protection mechanism for a pressure-resistant polyurethane thermal insulation pipe. The pipe head protection mechanism comprises a protection sleeve which is arranged outside the thermal insulation pipe and plays a role in protection and sealing; the protective sleeve is formed by combining an outer pipeline and an inner pipeline, a storage pipe connected with the protective sleeve is arranged in the portion, away from one end of the heat preservation pipe, of the protective sleeve, an adjusting screw is arranged on the portion, away from the heat preservation pipe, of the protective sleeve, and a contraction blocking end is arranged on the end face, located on the storage pipe, of the adjusting screw. According to the utility model, the integral sealing performance is better, and the leakage condition can be effectively prevented; in actual application, the contraction blocking end is driven by the adjusting screw rod to continue to move towards the thermal insulation pipe until obvious resistance is felt, at the moment, the two ends of the abutting end are tightly attached to the arc-shaped grooves, meanwhile, the outer wall of the umbrella-shaped end is tightly attached to the arc-shaped protrusions, sealing connection is formed, and therefore multiple sealing can be achieved, and the sealing effect is good. The sealing performance is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of thermal insulation pipe, especially relates to the pipe head protection mechanism for pressure resistance polyurethane thermal insulation pipe. BACKGROUND

[0002] Directly buried radiation mode has become the main radiation mode of domestic large heat supply network. The heat supply pipeline mostly adopts directly buried prefabricated pressure resistance polyurethane thermal insulation pipe. The pressure resistance polyurethane thermal insulation pipe is combined by outer pipe, inner pipe and thermal insulation joint.

[0003] The existing pipe head protection mechanism is mostly set on the outside of the pipeline, but the sealing property is poor at the joint position, and leakage is prone to occur.

[0004] Therefore, how to solve the defects in the above technical scheme has become one of the problems to be solved in the technical field of thermal insulation pipe. UTILITY MODEL CONTENTS

[0005] In view of the problems in the background art, the utility model provides a pipe head protection mechanism for pressure resistance polyurethane thermal insulation pipe, which comprises a protective sleeve arranged outside the thermal insulation pipe and serving as a protective sealing part. The protective sleeve is combined by an outer pipeline and an inner pipeline, and a cavity is formed between the inner pipeline and the outer pipeline. The cavity is filled with a thermal insulation pad made of heat insulation material. A receiving tube is arranged in the protective sleeve away from the thermal insulation pipe. An adjusting screw is arranged on the protective sleeve away from the thermal insulation pipe. The adjusting screw passes through the threaded holes of the protective sleeve and the receiving tube in sequence and extends into the receiving tube.

[0006] A contraction blocking end is arranged on the end face of the adjusting screw in the receiving tube.

[0007] Optionally, the connecting seat of the contraction blocking end is mounted on the end face of the adjusting screw.

[0008] The contraction blocking end is made of polyurethane elastomer or rubber.

[0009] Optionally, the contraction blocking end comprises an umbrella-shaped end and a contact end connected through a connecting rod and arranged in an integrated manner.

[0010] The two sides of the contact end are arranged in a hump shape.

[0011] Optionally, two groups of protrusions are arranged on the inner wall of the inner pipeline.

[0012] The protrusions and the inner wall of the inner pipeline form an arc-shaped groove for the two ends of the contact end to extend into and tightly abut.

[0013] An arc-shaped protrusion is arranged on the inner wall of the inner pipe at a position away from the heat preservation pipe, and tightly contacts the outer wall of the umbrella-shaped end.

[0014] Optionally, a locking ring is arranged outside the protective sleeve, and at least one set of adjusting devices is arranged on the locking ring.

[0015] In summary, the present application has the following advantages:

[0016] The present application has good overall sealing performance, and can effectively prevent leakage. In actual application, the contraction blocking end is driven to move towards the direction of the heat preservation pipe by rotating the adjusting screw, until the contraction blocking end is pushed out, at which time the contraction blocking end is released from the restriction and returns to its original state under the elasticity. Then, the adjusting screw is continuously rotated to drive the contraction blocking end to continue moving towards the direction of the heat preservation pipe, until a significant resistance is felt, at which time the two ends of the abutting end tightly contact the arc-shaped groove, and the outer wall of the umbrella-shaped end tightly contacts the arc-shaped protrusion, forming a sealed connection. Thus, multiple sealing can be achieved, and the sealing performance is improved. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 FIG. 1 is a schematic diagram of the overall structure of a pipe head protection mechanism for a pressure-resistant polyurethane heat preservation pipe according to an embodiment of the present application;

[0018] Figure 2 FIG. 1 is a schematic diagram of the overall structure of a pipe head protection mechanism for a pressure-resistant polyurethane heat preservation pipe according to an embodiment of the present application;

[0019] Figure 3 FIG. 1 is a schematic diagram of the overall structure of a pipe head protection mechanism for a pressure-resistant polyurethane heat preservation pipe according to an embodiment of the present application;

[0020] Figure 4 FIG. 1 is a schematic diagram of the overall structure of a pipe head protection mechanism for a pressure-resistant polyurethane heat preservation pipe according to an embodiment of the present application;

[0021] Figure 5 FIG. 1 is a schematic diagram of the overall structure of a pipe head protection mechanism for a pressure-resistant polyurethane heat preservation pipe according to an embodiment of the present application;

[0022] Figure 6 FIG. 1 is a schematic diagram of the overall structure of a pipe head protection mechanism for a pressure-resistant polyurethane heat preservation pipe according to an embodiment of the present application;

[0023] REFERENCE SIGNS:

[0024] 10, adjusting device; 101, hand wheel; 102, adjusting screw; 103, clamping block;

[0025] 20, protective sleeve; 201, outer pipe; 202, inner pipe; 2021, protrusion; 2023, arc-shaped protrusion; 2024, arc-shaped groove;

[0026] 30, locking ring;

[0027] 40, heat preservation pipe;

[0028] 50, closed end;

[0029] 60, adjusting screw;

[0030] 70, contraction blocking end; 701, abutting end; 702, connecting rod; 703, umbrella-shaped end; 704, connecting seat;

[0031] 80, storage pipe. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical scheme and advantages of the utility model more clear, the utility model will be further explained in detail below by combining with the drawings and specific embodiments. Although the example embodiments are disclosed in the drawings, it should be understood that the utility model can be realized in various forms and should not be limited by the embodiments described here. On the contrary, these embodiments are provided to facilitate a thorough understanding of the utility model and to convey the complete concept of the utility model to those skilled in the art.

[0033] In the description of the present specification, the description of the terms "some embodiments", "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms is not necessarily for the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine the different embodiments or examples described in the present specification and the features of the different embodiments or examples without contradiction.

[0034] In this utility model, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; the term "multiple" refers to two or more unless otherwise explicitly defined. The terms "install," "connect," "join," and "fix" should be interpreted broadly. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; "join" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0035] Example 1

[0036] like Figures 1-6 As shown, this embodiment provides a pipe end protection mechanism for pressure-resistant polyurethane insulation pipes, including a protective sleeve 20 disposed outside the insulation pipe 40 to provide protection and sealing. The protective sleeve 20 is composed of an outer pipe 201 and an inner pipe 202, and a cavity is provided between the inner pipe 202 and the outer pipe 20. The cavity is filled with an insulation pad made of heat-insulating material. The internal thread of the inner pipe 202 mates with the external thread of the insulation pipe 40 for threaded connection.

[0037] A receiving tube 80 is provided inside the protective sleeve 20, which is located away from the insulation pipe 40. The receiving tube 80 and the protective sleeve can be fixedly connected by welding or other methods. An adjusting screw 60 is provided on the protective sleeve 20, which is located away from the insulation pipe 40. The adjusting screw 60 passes through the threaded holes of the protective sleeve and the receiving tube 80 in sequence and extends into the receiving tube 80.

[0038] A shrinkage blocking end 70 is provided on the end face of the adjusting screw 60 located on the receiving tube 80. The connecting seat of the shrinkage blocking end 70 is fixedly installed on the end face of the adjusting screw 60 by a fastening pin. Since the shrinkage blocking end 70 can be made of polyurethane elastomer or rubber, it can quickly return to its original shape after being deformed by external force. When the insulation tube is in the transportation or installation state, in the non-working state, and does not need to be sealed, the shrinkage blocking end is stored in the receiving tube 80, and the receiving tube 80 provides a certain degree of protection for the shrinkage blocking end 70.

[0039] When the insulation pipe is in operation and needs to be sealed, simply rotate the adjusting screw 60. The adjusting screw 60 will drive the shrinkage blocking end 70 to move toward the insulation pipe 40 until the shrinkage blocking end 70 is pushed out. At this time, the shrinkage blocking end is released from restriction and returns to its original shape under elasticity.

[0040] Further, the shrinkage blocking end 70 comprises an umbrella-shaped end 703 and a resisting end 701 connected with the umbrella-shaped end 703 through a connecting rod 702, and the two sides of the resisting end 701 are arranged in a hump shape;

[0041] The inner wall of the inner pipe 202 is provided with two groups of protrusions 2021 arranged oppositely, and an arc-shaped groove 2024 is formed between the protrusions 2021 and the inner wall of the inner pipe 202, which is used for the two ends of the resisting end 701 (the positions where the arc-shaped end surface away from the connecting seat meets the two side end surfaces) to extend into and tightly contact.

[0042] The inner wall of the inner pipe 201 away from the position of the heat preservation pipe 40 is provided with an arc-shaped protrusion 2023 which tightly contacts with the outer wall of the umbrella-shaped end 703.

[0043] It should be noted that the shrinkage blocking end 70 is driven by the rotating adjusting screw 60 to move towards the heat preservation pipe 40 until the shrinkage blocking end 70 is pushed out, at which time the shrinkage blocking end is released and returns to its original state under the elasticity.

[0044] Then, the adjusting screw 60 is continuously rotated to drive the shrinkage blocking end 70 to continuously move towards the heat preservation pipe 40 until a significant resistance is felt, at which time the two ends of the resisting end 701 tightly contact with the arc-shaped groove 2024, and the outer wall of the umbrella-shaped end 703 tightly contacts with the arc-shaped protrusion 2023, forming a sealed connection, thereby realizing multiple sealing, improving the sealing performance, and effectively preventing leakage.

[0045] Embodiment Two

[0046] In actual application, the stability of the storage pipe is improved, as shown in Figure 1 and 6 The outer side of the protective sleeve 20 is provided with a locking ring 30, and at least one group of adjusting devices 10 are arranged on the locking ring 30. The adjusting device 10 comprises an adjusting threaded rod 102, and a clamping block 103 is arranged on the end surface of the adjusting threaded rod 102 located in the outer pipe of the protective sleeve 20, and the clamping block 103 is arranged in an arc shape.

[0047] It should be noted that the adjusting threaded rod 102 is rotated to cooperate with the threaded hole of the outer pipe, and the clamping block 103 is driven by the adjusting threaded rod to move towards the position of the storage pipe 80 until the arc-shaped end surface of the clamping block 103 abuts against the outer wall of the storage pipe 80, and then a plurality of clamping blocks 103 can clamp the storage pipe to improve the stability, and since the clamping block is located in the outer pipe, the overall sealing performance is not affected.

[0048] It should be pointed out finally that the above embodiments are only used to illustrate the technical solutions of the present application but are not restrictive. Although the present application is described in detail with reference to the embodiments, it should be understood by those skilled in the art that the technical solutions of the present application can be modified or replaced equivalently without departing from the spirit and scope of the present application, and they should be covered in the scope of the claims of the present application.

Claims

1. A pipe end protection mechanism for pressure-resistant polyurethane insulated pipes, characterized in that, The system includes a protective sleeve installed outside the insulation pipe to provide a protective seal. The protective sleeve is composed of an outer pipe and an inner pipe, located in the cavity between the inner and outer pipes, and the cavity is filled with an insulation pad made of heat-insulating material. A receiving tube connected to the protective sleeve is located inside the protective sleeve at the end furthest from the insulation pipe. An adjusting screw is installed on the protective sleeve furthest from the insulation pipe, passing through threaded holes in both the protective sleeve and the receiving tube, and extending into the receiving tube. A shrinkage blocking end is provided on the end face of the adjusting screw located in the receiving tube.

2. The pipe head protection mechanism for pressure-resistant polyurethane insulated pipes according to claim 1, characterized in that, The connecting seat at the end of the contraction blocking is mounted on the end face of the adjusting screw; The entire shrinkage blocking end is made of polyurethane elastomer or rubber.

3. The pipe head protection mechanism for pressure-resistant polyurethane insulation pipes according to claim 2, characterized in that, The contraction blocking end includes an umbrella-shaped end and an abutting end connected to it by a connecting rod and integrally formed therewith. The two sides of the contact end are arranged in a waist-like shape.

4. The pipe head protection mechanism for pressure-resistant polyurethane insulation pipes according to claim 3, characterized in that, The inner wall of the inner pipe is provided with two sets of oppositely arranged protrusions. An arc-shaped groove is formed between the protrusion and the inner wall of the inner pipe, allowing both ends of the contacting end to extend into and fit tightly together. An arc-shaped protrusion is provided on the inner wall of the inner pipe at a location away from the insulation pipe, which is in close contact with the outer wall of the umbrella-shaped end.

5. The pipe head protection mechanism for pressure-resistant polyurethane insulated pipes according to claim 1, characterized in that, A locking ring is provided on the outer side of the protective sleeve, and at least one set of adjusting devices is provided on the locking ring. The adjusting device includes an adjusting threaded rod, and a clamping block is provided on the end face of the adjusting threaded rod located inside the outer pipe of the protective sleeve. The clamping block is arranged in an arc shape.

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