A pipe expansion joint

Abstract

The utility model belongs to the technical field of tubular expansion joint especially to a tubular expansion joint, including outer connecting pipe, still including outer pipe flange A, outer pipe flane B, inner connecting pipe, inner tube flange, first bolt, limit block, sealing flange, second bolt, nut, packing, placing groove, packing gland, third bolt, guide rod, clamping block, round hole, the inner surface sliding connection of outer connecting pipe has inner connecting pipe, the surface fixed connection of outer connecting pipe has outer pipe flange A, the one end fixed connection of inner connecting pipe away from outer pipe flange A has inner tube flange, the surface of outer pipe flange A and inner tube flange all symmetrical thread connection has a plurality of first bolt, the utility model can solve the problem that long pipeline telescopic quantity is big, makes long pipeline to have enough telescopic quantity to keep the stability and continuity of pipeline system to improve the pipeline safety while still guaranteeing the normal conveyance of liquid in pipeline.

Description

Technical Field

[0001] This utility model belongs to the technical field of tubular expansion joints, and specifically relates to a tubular expansion joint. Background Technology

[0002] During operation, pipelines expand and contract due to changes in ambient temperature, causing changes in pipeline length. Expansion joints can absorb axial, lateral, and angular expansion and contraction caused by temperature changes, thus protecting the pipeline from damage. In actual use, corrugated pipe expansion joints are purchased directly. However, these expansion joints have a small expansion range and are not suitable for long pipelines.

[0003] In this existing design, due to the small expansion and contraction of the corrugated pipe, the expansion joint of this prior art has a small expansion and contraction range, which is not suitable for the expansion and contraction of long pipelines. Especially in winter, the alternating hot and cold liquids in the pipeline repeatedly stretch the expansion joints, often causing them to break and leak, thus affecting the normal transportation of liquids.

[0004] Therefore, a tubular expansion joint was designed to solve the above problems. Utility Model Content

[0005] To address the problems mentioned in the background section, this invention provides a tubular expansion joint. This device allows for sufficient expansion and contraction for long pipelines, thus solving the problem of large expansion and contraction in long pipelines.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a tubular expansion joint, including an outer connecting pipe, an outer pipe flange A, an outer pipe flange B, an inner connecting pipe, an inner pipe flange, a first bolt, a limiting block, a sealing flange, a second bolt, a nut, packing, a placement groove, a packing gland, a third bolt, a guide rod, a locking block, and a round hole;

[0007] An inner connecting pipe is slidably connected to the inner surface of the outer connecting pipe. An outer pipe flange A is fixedly connected to the surface of the outer connecting pipe. An inner pipe flange is fixedly connected to the end of the inner connecting pipe away from the outer pipe flange A. Several first bolts are symmetrically threaded onto the surfaces of the outer pipe flange A and the inner pipe flange. A main pipe is provided on the surfaces of the outer pipe flange A and the inner pipe flange. The outer pipe flange A and the inner pipe flange are fixedly connected to the main pipe by the first bolts.

[0008] As a preferred embodiment of the tubular expansion joint of this utility model, a limit block is fixedly connected to the end of the inner connecting pipe away from the inner pipe flange.

[0009] As the utility model discloses a pipe expansion joint optimal, the surface of outer pipe flange B is provided with sealing flange, a plurality of second bolts are connected to the surface of sealing flange, the sealing flange is fixedly connected with outer pipe flange B through second bolt, the surface of second bolt is all connected with nut, the surface of sealing flange is provided with packing packing, and the surface of sealing flange is provided with placing groove, the surface of sealing flange is provided with packing gland, the surface of packing gland is connected with a plurality of third bolts, and the sealing flange is fixedly connected with sealing flange through third bolt.

[0010] As the utility model discloses a pipe expansion joint optimal, the surface of outer pipe flange A, outer pipe flange B and sealing flange is provided with a plurality of guide rods, and the both ends of guide rod are fixedly connected with clamping block, and the surface of outer pipe flange A, outer pipe flange B and sealing flange all are provided with round hole that cooperates with guide rod.

[0011] Compared with the prior art, the utility model has the advantages that can solve the problem that long pipeline has large expansion amount, makes long pipeline have enough expansion amount, thereby keeping the stability and continuity of pipeline system, improves the safety of pipeline and guarantees the normal conveying of liquid in pipeline. BRIEF DESCRIPTION OF DRAWINGS

[0012] The drawings are used to provide further understanding of the utility model, and constitute part of the specification, are used to explain the utility model with the embodiment of the utility model, and do not constitute the limitation to the utility model.In the drawings:

[0013] Figure 1 It is the whole schematic view of the utility model;

[0014] Figure 2 It is the structure schematic view of outer pipe flange in the utility model;

[0015] Figure 3 It is the structure schematic view of guide rod in the utility model;

[0016] Figure 4 It is the structure schematic view of packing gland in the utility model;

[0017] Figure 5 It is the structure schematic view of sealing flange in the utility model;

[0018] In the drawing:

[0019] 1, outer connecting pipe; 11, outer pipe flange A; 12, outer pipe flange B; 2, inner connecting pipe; 21, inner pipe flange; 3, first bolt; 4, limit block; 5, sealing flange; 51, second bolt; 52, nut; 53, packing; 54, placement groove; 55, packing gland; 56, third bolt; 6, guide rod; 61, clamping block; 62, round hole. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0021] Embodiment 1

[0022] As shown in the drawings; Figure 1

[0023] A pipe expansion joint comprises an outer connecting pipe 1.

[0024] Further, as shown in the drawings:

[0025] As shown in the drawings: Figures 1 to 5

[0026] In combination with the above, the pipe expansion joint further comprises an outer pipe flange A 11, an outer pipe flange B 12, an inner connecting pipe 2, an inner pipe flange 21, a first bolt 3, a limit block 4, a sealing flange 5, a second bolt 51, a nut 52, a packing 53, a placement groove 54, a packing gland 55, a third bolt 56, a guide rod 6, a clamping block 61 and a round hole 62.

[0027] The inner connecting pipe 2 is slidably connected to the inner surface of the outer connecting pipe 1, the outer pipe flange A 11 is fixedly connected to the surface of the outer connecting pipe 1, the inner pipe flange 21 is fixedly connected to the end of the inner connecting pipe 2 away from the outer pipe flange A 11, the outer pipe flange A 11 and the inner pipe flange 21 are symmetrically and threadedly connected with the first bolts 3, the outer pipe flange A 11 and the inner pipe flange 21 are provided with a main pipe, and the outer pipe flange A 11 and the inner pipe flange 21 are fixedly connected with the main pipe through the first bolts 3.

[0028] ​​In the embodiment, the surface of the outer pipe flange A11 and the surface of the inner pipe flange 21 are symmetrically screwed with a plurality of first bolts 3, the outer pipe flange A11 and the inner pipe flange 21 are fixedly connected with the main pipe through the first bolts 3, the inner surface of the outer connecting pipe 1 is slidingly connected with the inner connecting pipe 2, the staff first places the inner connecting pipe 2 in the inner part of the outer connecting pipe 1, then fixes the outer pipe flange A11 and the main pipe together through the first bolts 3, then drives the inner connecting pipe 2 to slide on the surface of the outer connecting pipe 1 according to the distance between the two ends of the main pipe, until the inner pipe flange 21 is attached to the surface of the main pipe, then the staff fixes the inner pipe flange 21 and the main pipe together through the first bolts 3, realizes the connection of the main pipe, this design can absorb the stress of the main pipe caused by temperature change, solves the problem of large expansion and contraction of long pipes, makes the long pipeline have enough expansion and contraction, thereby maintaining the stability and continuity of the pipeline system, improves the safety of the pipeline and also ensures the normal transportation of the liquid in the pipeline.

[0029] Further,

[0030] In an optional embodiment, the end of the inner connecting pipe 2 away from the inner pipe flange 21 is fixedly connected with a limiting block 4.

[0031] In the embodiment, because the end of the inner connecting pipe 2 away from the inner pipe flange 21 is fixedly connected with the limiting block 4, when the inner connecting pipe 2 slides on the inner surface of the outer connecting pipe 1, the limiting block 4 can prevent the inner connecting pipe 2 from sliding out of the inner part of the outer connecting pipe 1, thereby causing the phenomenon of disconnection of the pipeline system.

[0032] Further,

[0033] In an optional embodiment, the surface of the outer pipe flange B12 is provided with a sealing flange 5, the surface of the sealing flange 5 is screwed with a plurality of second bolts 51, the sealing flange 5 is fixedly connected with the outer pipe flange B12 through the second bolts 51, the surface of the second bolt 51 is screwed with a nut 52, the surface of the sealing flange 5 is provided with a packing 53, the surface of the sealing flange 5 is provided with a placing groove 54, the surface of the sealing flange 5 is provided with a packing gland 55, the surface of the packing gland 55 is screwed with a plurality of third bolts 56, and the packing gland 55 is fixedly connected with the sealing flange 5 through the third bolts 56.

[0034] In the embodiment, the surface of the outer pipe flange B12 is provided with the sealing flange 5, the surface of the sealing flange 5 is threadedly connected with a plurality of second bolts 51, the sealing flange 5 is fixed on the surface of the outer pipe flange B12 by the second bolts 51, then the sealing flange 5 and the outer pipe flange B12 are reinforced by the nuts 52, the surface of the sealing flange 5 is provided with the packing 53, the surface of the sealing flange 5 is provided with the placing groove 54, the surface of the sealing flange 5 is provided with the packing gland 55, the surface of the packing gland 55 is threadedly connected with a plurality of third bolts 56, the packing 53 is fixed on the surface of the sealing flange 5 through the placing groove 54, then the packing gland 55 is covered and fixed by the third bolts 56, so that the sealing between the outer connecting pipe 1 and the inner connecting pipe 2 is better, and the loss of the liquid transported in the pipeline is reduced.

[0035] Further,

[0036] In an optional embodiment, the surfaces of the outer pipe flange A11, the outer pipe flange B12 and the sealing flange 5 are symmetrically provided with a plurality of guide rods 6, both ends of the guide rod 6 are fixedly connected with a clamping block 61, and the surfaces of the outer pipe flange A11, the outer pipe flange B12 and the sealing flange 5 are all provided with a circular hole 62 matched with the guide rod 6.

[0037] In the embodiment, the surfaces of the outer pipe flange A11, the outer pipe flange B12 and the sealing flange 5 are symmetrically provided with a plurality of guide rods 6, both ends of the guide rod 6 are fixedly connected with a clamping block 61, and the surfaces of the outer pipe flange A11, the outer pipe flange B12 and the sealing flange 5 are all provided with a circular hole 62 matched with the guide rod 6, when the inner connecting pipe 2 slides on the surface of the outer connecting pipe 1, the inner connecting pipe 2 moves in the direction of the guide rod 6, so that the sliding direction of the inner connecting pipe 2 is ensured, and the clamping block 61 can prevent the guide rod 6 from being separated from the inner connecting pipe 2 and the outer connecting pipe 1.

[0038] Working principle: the staff first put the inner connecting pipe 2 in the inside of the outer connecting pipe 1, then the outer pipe flange A11 is fixedly connected with the main pipe through the first bolt 3, then according to the distance between the two ends of the main pipe, the inner connecting pipe 2 is slid on the surface of the outer connecting pipe 1 until the inner pipe flange 21 is attached to the surface of the main pipe, then the staff fixes the inner pipe flange 21 with the main pipe through the first bolt 3, realizes the connection of the main pipe, this design can absorb the stress of the main pipe caused by temperature change, so as to solve the problem of large expansion of long pipeline, make the long pipeline have enough expansion, so as to keep the stability and continuity of the pipeline system, improve the safety of the pipeline and ensure the normal transportation of the liquid in the pipeline, when the inner connecting pipe 2 slides on the inner surface of the outer connecting pipe 1, the limiting block 4 can prevent the inner connecting pipe 2 from sliding out of the inside of the outer connecting pipe 1, so as to cause the phenomenon of disconnection of the pipeline system, then the staff fixes the sealing flange 5 on the surface of the outer pipe flange B12 through the second bolt 51, then the sealing flange 5 and the outer pipe flange B12 are reinforced through the nut 52, after the reinforcement is completed, the staff fixes the packing packing 53 on the surface of the sealing flange 5 through the placing groove 54, then covers the packing gland 55, and fixes it through the third bolt 56, which can make the sealing between the outer connecting pipe 1 and the inner connecting pipe 2 better, reduce the loss of the liquid transported in the pipeline, when the inner connecting pipe 2 slides on the surface of the outer connecting pipe 1, the direction of the guide rod 6 is moved, which can ensure the sliding direction of the inner connecting pipe 2, and the clamping block 61 can avoid the guide rod 6 from separating from the inner connecting pipe 2 and the outer connecting pipe 1.

[0039] Finally, it should be pointed out that: the above only for the preferred embodiments of the present application, and is not intended to limit the present application, although the present application has been described in detail with reference to the foregoing embodiments, for those skilled in the art, it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A pipe expansion joint comprising an outer connecting pipe (1), characterized in that: It also includes outer tube flange A (11), outer tube flange B (12), inner connecting pipe (2), inner tube flange (21), first bolt (3), limit block (4), sealing flange (5), second bolt (51), nut (52), packing (53), placing groove (54), packing gland (55), third bolt (56), guide rod (6), clamping block (61), round hole (62); The inner surface of the outer connecting pipe (1) is slidably connected with the inner connecting pipe (2), the surface of the outer connecting pipe (1) is fixedly connected with the outer tube flange A (11), one end of the inner connecting pipe (2) away from the outer tube flange A (11) is fixedly connected with the inner tube flange (21), the surfaces of the outer tube flange A (11) and the inner tube flange (21) are symmetrically screw-connected with a plurality of first bolts (3), the surfaces of the outer tube flange A (11) and the inner tube flange (21) are provided with a main pipe, and the outer tube flange A (11) and the inner tube flange (21) are fixedly connected with the main pipe through the first bolts (3).

2. The pipe expansion joint of claim 1, wherein: The inner connecting pipe (2) is fixedly connected with a limit block (4) at one end away from the inner tube flange (21).

3. The pipe expansion joint of claim 1, wherein: The surface of the outer tube flange B (12) is provided with a sealing flange (5), the surface of the sealing flange (5) is screw-connected with a plurality of second bolts (51), the sealing flange (5) is fixedly connected with the outer tube flange B (12) through the second bolts (51), the surfaces of the second bolts (51) are screw-connected with nuts (52), the surface of the sealing flange (5) is provided with a packing (53), the surface of the sealing flange (5) is provided with a placing groove (54), the surface of the sealing flange (5) is provided with a packing gland (55), the surface of the packing gland (55) is screw-connected with a plurality of third bolts (56), and the packing gland (55) is fixedly connected with the sealing flange (5) through the third bolts (56).

4. The pipe expansion joint of claim 1, wherein: The surfaces of the outer tube flange A (11), the outer tube flange B (12) and the sealing flange (5) are symmetrically provided with a plurality of guide rods (6), both ends of the guide rod (6) are fixedly connected with a clamping block (61), and the surfaces of the outer tube flange A (11), the outer tube flange B (12) and the sealing flange (5) are provided with round holes (62) matched with the guide rods (6).

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