Polyurethane pipeline joint convenient to connect and fix

Abstract

The utility model relates to the technical field of pipe fittings, in particular to a polyurethane pipeline joint convenient to connect and fix, which comprises an insertion pipe used for connecting two steel pipes, a polyurethane heat preservation layer fixedly sleeved on the outer side of each steel pipe, a polyethylene plastic outer protection pipe fixedly sleeved on the outer side of each polyurethane heat preservation layer, and a lantern ring integrally formed at the outer ring of the insertion pipe. Outer ring grooves are formed in the two ends of the outer ring surface of the lantern ring, clamping blocks are inserted into the surfaces of the outer ring grooves, baffle rings are arranged in the outer ring grooves in a sleeving mode, and the baffle rings push the clamping blocks to clamp the steel pipe; the beneficial effects are that the lantern ring is integrally formed on the outer ring of the insertion pipe, and the gap is reserved between the lantern ring and the polyurethane thermal insulation layer, so that the thermal insulation layer is prevented from being directly damaged by high temperature during welding. And the design of the baffle ring further protects the welding point and prevents the welding point from being exposed in the external environment, so that the integrity and the thermal insulation performance of the thermal insulation layer are kept.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of pipe fitting, specifically to a polyurethane pipeline joint convenient to connect and fix. BACKGROUND

[0002] In the field of pipeline connection, especially the connection of polyurethane insulation pipeline, traditional connection methods often have problems such as complex operation, unstable fixation, or easy damage to the insulation layer. Polyurethane insulation pipeline is usually composed of a core steel pipe, a polyurethane insulation layer, and a polyethylene plastic outer protective pipe. This multi-layer structure requires special care during connection to avoid damaging the insulation layer or affecting the insulation performance of the connection.

[0003] Traditional connection methods may include flange connection, threaded connection, or welding, but these methods have limitations when applied to polyurethane insulation pipelines. Flange connection is convenient, but the connection can easily become a thermal bridge, affecting the insulation effect; threaded connection may damage the insulation layer due to excessive tightening force; directly welding the core steel pipe may damage the polyurethane insulation layer due to high temperature.

[0004] Therefore, there is an urgent need in the market for a pipeline joint that can firmly connect steel pipes while protecting the polyurethane insulation layer from damage. This joint needs to be easy to install, can achieve tight connection of steel pipes without damaging the insulation layer, and has a certain pre-limiting function to ensure the stability of the position of the steel pipe during welding. SUMMARY

[0005] The utility model aims at providing a polyurethane pipeline joint convenient to connect and fix to solve the problems raised in the background.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a polyurethane pipeline joint convenient to connect and fix, including a pipe plug for connecting two steel pipes, a polyurethane insulation layer is fixed on the outside of the steel pipe, a polyethylene plastic outer protective pipe is fixed on the outside of the polyurethane insulation layer, an eye ring is integrally formed on the outer ring of the pipe plug, an outer ring groove is formed on both ends of the outer ring surface of the eye ring, a clamping block is inserted into the surface of the outer ring groove, a stop ring is sleeved in the inner part of the outer ring groove, the stop ring pushes and extrudes the clamping block to clamp the steel pipe, the end of the eye ring and the outer wall of the steel pipe are welded to form a welding point, and the stop ring covers the welding point.

[0007] Preferably, the steel pipe is provided with two, the two ends of the pipe plug are inserted into the two steel pipes respectively, the eye ring is a circular pipe with a "T" shaped cross section, and the inner ring plate of the eye ring is clamped between the two steel pipes.

[0008] Preferably, the inner ring surface of the insertion tube is provided with two inner ring grooves corresponding to the outer ring grooves, the outer ring surface of the inner ring groove is provided with a plurality of sockets, the clamping blocks and the sockets are one-to-one corresponding, the clamping blocks are inserted into the sockets, and the height of the clamping block is greater than the height of the socket.

[0009] Preferably, the two parallelly distributed side walls of the inner ring groove are fixed with a rubber band, one end of the clamping block is fixed to the outer ring surface of the rubber band, and the other end of the clamping block is provided with an inclined surface.

[0010] Preferably, the stop ring is in the structure of a circular tube with a section in the shape of "L", when the stop ring extrudes the clamping block, the clamping block is stretched and deformed, the clamping block clamps the rubber band on the outer ring surface of the steel pipe, one end of the stop ring abuts against the end of the polyethylene plastic outer protective pipe, the other end of the stop ring is provided with a side groove, the side groove is in the shape of a ring groove, a screw rod is screwed on the surface of the side groove, one end of the screw rod is screwed in a screw groove, and the screw groove is arranged on the surface of the outer ring groove.

[0011] Compared with the prior art, the polyurethane pipe joint convenient to connect and fix has the advantages that:

[0012] The polyurethane pipe joint convenient to connect and fix has the advantages that: the sleeve ring is integrally formed at the outer ring of the insertion tube, and a gap is reserved between the sleeve ring and the polyurethane thermal insulation layer, so that direct damage of high temperature to the thermal insulation layer during welding is avoided. The design of the stop ring further protects the welding point and prevents it from being exposed to the external environment, so that the integrity and thermal insulation performance of the thermal insulation layer are maintained. Before welding, the stop ring is slid along the outer ring groove by being pushed, the inner ring surface of the stop ring extrudes the clamping block, the clamping block is retracted into the socket and stretched and deformed, and the sleeve ring is sleeved on the two steel pipes after pre-limiting. The pre-limiting function ensures the position stability of the steel pipes during the welding process, and improves the accuracy and efficiency of the welding. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 The utility model discloses a structure schematic diagram;

[0014] Figure 2 The utility model discloses a structure top view;

[0015] Figure 3 The utility model discloses a structure schematic diagram; Figure 2 The utility model discloses a structure schematic diagram;

[0016] Figure 4 The utility model discloses a structure schematic diagram; Figure 3 The utility model discloses a structure schematic diagram;

[0017] Figure 5 The utility model discloses a structure schematic diagram;

[0018] In the figure: cannula 1, collar 2, inner ring groove 3, outer ring groove 4, welding point 5, socket 6, rubber band 7, clamping block 8, retaining ring 9, edge groove 10, screw rod 11, steel pipe 12, polyurethane heat preservation layer 13, polyethylene plastic outer protective tube 14. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical scheme of the utility model to be clear, complete description, and the advantage is more clear and apparent, the following combining with the figure to the utility model embodiment carries out further detailed explanation. It should be understood that the specific embodiments described here are part of the embodiments of the utility model, not all embodiments, only to explain the utility model embodiments, and not for limiting the utility model embodiments, all other embodiments obtained by the person skilled in the art without doing creative work under the premise, belong to the scope of the utility model protection.

[0020] Please refer to Figures 1-5 The utility model provides a kind of technical scheme: a kind of polyurethane pipeline joint of being convenient for to connect fixed, including cannula 1, for connecting two steel pipes 12, the outer side of steel pipe 12 is equipped with fixed polyurethane heat preservation layer 13, the outer side of polyurethane heat preservation layer 13 is equipped with fixed polyethylene plastic outer protective tube 14, the outer ring of cannula 1 is integrally formed with collar 2, steel pipe 12 is equipped with two, the both ends of cannula 1 are respectively inserted in two steel pipes 12, collar 2 is the circular pipe of section being "T" letter shape, the inner ring plate of collar 2 is clamped between two steel pipes 12.When using, cannula 1 is installed between two steel pipes 12, ensure that the both ends of cannula 1 are respectively inserted in two steel pipes 12, and the end of collar 2 and polyurethane heat preservation layer 13 are reserved gap, at this time, the inner ring plate of collar 2 is clamped between two steel pipes 12, in the gap of polyurethane heat preservation layer 13 and collar 2, the end of collar 2 and steel pipe 12 are welded together, constitute welding point 5, so that two steel pipes 12 are fixed together by cannula 1 cooperation collar 2.

[0021] The outer ring surface of the sleeve ring 2 is provided with an outer ring groove 4 at both ends, the surface of the outer ring groove 4 is inserted with a clamping block 8, the inner part of the outer ring groove 4 is sleeved with a stop ring 9, the stop ring 9 pushes and extrudes the clamping block 8 to clamp the steel pipe 12, the end of the sleeve ring 2 and the outer wall of the steel pipe 12 are welded to form a welding point 5, and the stop ring 9 covers the welding point 5; the inner ring surface of the insertion pipe 1 is provided with two inner ring grooves 3, the inner ring groove 3 corresponds to the outer ring groove 4, the outer ring surface of the inner ring groove 3 is provided with a plurality of sockets 6, the clamping block 8 and the socket 6 correspond one by one, the clamping block 8 is inserted in the socket 6, and the height of the clamping block 8 is greater than the height of the socket 6; the two parallel distributed side walls of the inner ring groove 3 are fixed with a rubber band 7, one end of the clamping block 8 is fixed to the outer ring surface of the rubber band 7, and the other end of the clamping block 8 is provided with an inclined surface; the stop ring 9 is a circular tube structure with a cross section in the shape of "L", when the stop ring 9 extrudes the clamping block 8, the clamping block 8 stretches and deforms the rubber band 7, and the clamping block 8 clamps the rubber band 7 on the outer ring surface of the steel pipe 12, one end of the stop ring 9 abuts against the end of the polyethylene plastic outer protective pipe 14, the other end of the stop ring 9 is provided with a side groove 10, the side groove 10 is an annular groove, the surface of the side groove 10 is screwed with a screw rod 11, one end of the screw rod 11 is screwed in a screw groove, and the screw groove is provided on the surface of the outer ring groove 4.

[0022] In use, before the sleeve ring 2 and the steel pipe 12 are welded, when the two ends of the insertion pipe 1 are inserted into the two steel pipes 12, the stop ring 9 is pushed to slide along the outer ring groove 4, the inner ring surface of the stop ring 9 pushes and extrudes the clamping block 8 along the inclined surface, in the process that the clamping block 8 is retracted into the socket 6, the stop ring 9 stretches and deforms the rubber band 7, at this time, the clamping block 8 clamps the steel pipe 12, realizes the pre-limiting of the sleeve ring 2 after being sleeved on the two steel pipes 12, and after the screw rod 11 is screwed into the screw groove, the stop ring 9 is braked, the stable limiting of the clamping block 8 by the stop ring 9 is ensured, one end of the stop ring 9 abuts against one side of the polyethylene plastic outer protective pipe 14, and the welding point 5 is prevented from being exposed.

[0023] The use process of the polyurethane pipe joint is as follows: the two ends of the insertion pipe 1 are respectively inserted into the two steel pipes 12, and the insertion pipe 1 is ensured to be tightly matched with the steel pipes 12. The position of the insertion pipe 1 is adjusted, so that the sleeve ring 2 is located between the two steel pipes 12, and the inner ring plate of the sleeve ring 2 is clamped between the two steel pipes 12. It is ensured that there is enough gap between the end of the sleeve ring 2 and the polyurethane insulation layer 13, so as to facilitate subsequent welding. Before the sleeve ring 2 and the steel pipe 12 are welded, the stop ring 9 is pushed along the outer ring groove 4. The inner ring surface of the stop ring 9 pushes along the inclined surface of the clamping block 8, so that the clamping block 8 is retracted into the socket 6. In this process, the stop ring 9 stretches and deforms the rubber belt 7, and the clamping block 8 generates clamping force on the steel pipe 12, so as to realize the pre-limiting of the sleeve ring 2 after being sleeved on the two steel pipes 12. The screw rod 11 is screwed, and is inserted into the screw groove on the surface of the outer ring groove 4. The insertion of the screw rod 11 realizes the braking of the stop ring 9, and ensures that the stop ring 9 stably limits the clamping block 8. The end of the sleeve ring 2 and the outer wall of the steel pipe 12 are welded together at the gap between the polyurethane insulation layer 13 and the sleeve ring 2, to form the welding point 5. During the welding process, the stop ring 9 covers the welding point 5 to protect the welding area. After the welding is completed, one end of the stop ring 9 abuts against the end of the polyethylene plastic outer protective pipe 14, so as to avoid that the welding point 5 is exposed to the outside. The stop ring 9 is ensured to provide effective protection for the welding point 5, so as to prevent the welding point 5 from being damaged by the external environment. The quality of the welding point 5 is checked, so as to ensure that the welding is firm and crack-free. The installation of the entire pipe joint is checked, and it is confirmed that all components are correctly installed and reliably fastened.

[0024] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and modifications can be made to these embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A polyurethane pipe joint for easy connection and fixation, comprising a insert (1) for connecting two steel pipes (12), wherein a polyurethane insulation layer (13) is sleeved and fixed on the outside of the steel pipes (12), and a polyethylene plastic outer protective pipe (14) is sleeved and fixed on the outside of the polyurethane insulation layer (13), characterized in that: The outer ring of the cannula (1) is integrally formed with a collar (2), the outer ring surface of the collar (2) is provided with an outer ring groove (4) at both ends, the surface of the outer ring groove (4) is inserted with a clamping block (8), the inner part of the outer ring groove (4) is sleeved with a stop ring (9), the stop ring (9) pushes and extrudes the clamping block (8) to clamp the steel pipe (12), the end of the collar (2) and the outer wall of the steel pipe (12) are welded to form a welding point (5), and the stop ring (9) covers the welding point (5).

2. A polyurethane pipe coupling for facilitating connection and securement according to claim 1, wherein: The steel pipe (12) is provided with two, the two ends of the cannula (1) are respectively inserted into the two steel pipes (12), the collar (2) is a circular pipe with a "T" shaped cross section, and the inner ring plate of the collar (2) is clamped between the two steel pipes (12).

3. A polyurethane pipe coupling for facilitating connection and securement according to claim 1, wherein: The inner ring surface of the cannula (1) is provided with two inner ring grooves (3), the inner ring grooves (3) and the outer ring grooves (4) correspond, the outer ring surface of the inner ring groove (3) is provided with a plurality of sockets (6), the clamping block (8) and the socket (6) one-to-one correspond, the clamping block (8) is inserted into the socket (6), and the height of the clamping block (8) is greater than the height of the socket (6).

4. A polyurethane pipe coupling for facilitating connection and securement according to claim 3, wherein: The two parallel distributed side walls of the inner ring groove (3) are fixed with a rubber band ring (7), one end of the clamping block (8) is fixed to the outer ring surface of the rubber band ring (7), and the other end of the clamping block (8) is provided with an inclined surface.

5. A polyurethane pipe coupling for facilitating connection and securement as defined in claim 1, wherein: The stop ring (9) is a circular pipe structure with an "L" shaped cross section, when the stop ring (9) extrudes the clamping block (8), the clamping block (8) stretches and deforms the rubber band ring (7), and the clamping block (8) clamps the rubber band ring (7) on the outer ring surface of the steel pipe (12), one end of the stop ring (9) abuts against the end of the polyethylene plastic outer protective pipe (14), the other end of the stop ring (9) is provided with a side groove (10), the side groove (10) is an annular groove, the surface of the side groove (10) is screwed with a screw rod (11), one end of the screw rod (11) is screwed in a screw groove, and the screw groove is provided on the surface of the outer ring groove (4).

Images