CN218543475U - Double-layer pipe pipeline welded joint - Google Patents

Abstract

The utility model provides a double-layer pipe pipeline welded joint, including the weld end, the inboard welding of weld end has the nipple pipe, and the outside of nipple pipe is provided with the outer tube, and the inboard welding of outer tube has the inner tube, the sealing member is installed to the medial extremity face of inner tube, and the outside of sealing member sets up to the rubber ring to the inboard of rubber ring is provided with the inner ring piece, the sliding connection of sealing member has the external screw thread pipe, and the outside of external screw thread pipe slides and has cup jointed the locking ring to the both ends of external screw thread pipe all with the nipple pipe spiro union. The utility model provides a welded joint who relates to in the background art patent file can not connect the pipeline of different pipe diameters, and can't adjust the problem of self length in order to adapt to pipeline port interval.

Description

Double-layer pipe pipeline welded joint

Technical Field

The utility model relates to a welded joint technical field, concretely relates to double-deck pipe pipeline welded joint.

Background

The double-layer pipe is a pipeline which can keep the temperature of a conveying medium and is structurally a two-layer steel pipe, the inner layer of the double-layer pipe is a conveying pipe, the outer layer of the double-layer pipe is a protective sleeve, a heat-insulating material is placed in an annular gap between the inner pipe and the outer pipe, and the double-layer pipe pipeline is usually connected by a welding joint in use; a welded joint refers to a joint where two or more parts are to be joined by welding, or a joint where two or more parts are joined by a welding method, including a weld, a fusion zone, and a heat-affected zone. The fusion welded joint is formed by local heating with a high temperature heat source, and consists of weld metal, a fusion zone, a heat affected zone and base metal.

Chinese patent with application number CN201921133862.6 discloses a safe type welded joint, the utility model discloses a first connector corresponds the form of a plurality of second connectors, mix various joint modes such as cross joint, butt joint, the T-joint, the angle joint is mixed together, be applicable to the connected mode of different pipelines, need not take this kind of single connection of 90 degrees, can realize the installation of a plurality of angles, synthesize, thus, just can take a standard component, the adaptation is in the demand of multiple mounting means, do not worry the unmatched problem of the model that leads to of joint unadaptation, can also carry out the adaptability according to the quantity of pipeline and select, it is convenient, bring breakthrough's progress for the connection work of joint, furthermore, annular installed part slides in the ring channel, can realize the direction regulation of installation piece, just so can adjust the position of mounting hole according to actual installation demand, realize the installation of joint main part, need not worry the direction problem of fixing device.

Although the above patent documents meet the requirement of adapting the welding joint to various connection modes, there are still some disadvantages:

this connect main part internal thread can only connect specific size's standard pipeline, and the double-deck pipeline of different pipe diameters of not being convenient for uses, and the spiro union connection leakproofness is relatively poor, secondly, to the pipeline of level butt joint, if this joint length of not arranging of pipeline port interval then leads to connecting inconveniently, consequently should connect the length of being not convenient for adjust self, uses comparatively to limit.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects in the prior art, a double-layer pipe pipeline welding joint is provided so as to solve the problems that the welding joint related in the patent document of the background art can not be connected with pipelines with different pipe diameters and can not adjust the length of the welding joint to adapt to the distance between the ports of the pipelines.

In order to achieve the above object, there is provided a double-pipe welded joint, comprising:

the welding end, the inboard welding of welding end has the nipple pipe, and the outside of nipple pipe is provided with the outer tube, and the inboard welding of outer tube has the inner tube, the sealing member is installed to the medial surface of inner tube, and the outside of sealing member sets up to the rubber ring to the inboard of rubber ring is provided with the inner ring piece, the sliding connection of sealing member has external screw thread pipe, and the outside slip of external screw thread pipe has cup jointed the locking ring to the both ends of external screw thread pipe all with the nipple pipe spiro union.

Furthermore, the outer side of the screwed pipe is sleeved with a corrugated pipe made of a plastic material, the outer diameter of the corrugated pipe is smaller than the diameter of the inner side end of the welding end, and two ends of the corrugated pipe are in elastic contact with the end face of the inner side of the welding end.

Furthermore, the outside of the welding end is provided with a conical pipe, the narrow end opening of the conical pipe faces outwards, and a rectangular strip-shaped welding groove is formed in the outer wall of the conical pipe.

Furthermore, the port of the inner side of the outer pipe is provided with a first screw hole, the ring body of the locking ring is provided with a second screw hole, and the internal threads of the first screw hole and the second screw hole are the same.

Furthermore, an installation groove is formed between the inner side end openings of the outer pipe and the inner pipe, the sealing element is embedded in the installation groove, and the outer end of the sealing element protrudes out of the groove opening of the installation groove.

Furthermore, all setting up of inner ring piece and rubber ring to the fluororubber material, and inner ring piece and rubber ring set up structure as an organic whole, and the thickness of inner ring piece sets up to half of rubber ring.

Furthermore, the welding end, the screwing pipe and the locking ring are provided in a pair, the outer diameter of the locking ring is the same as that of the screwing pipe, and the outer diameter of the screwing pipe is smaller than the diameter of the end face of the inner side of the welding end.

The beneficial effects of the utility model reside in that, the utility model discloses a double-deck pipe pipeline welded joint utilizes the conical duct that the welding end includes to be convenient for peg graft the pipeline of the same or different pipe diameters at its both ends for the pipeline port joint that treats to connect is at the outer wall of conical duct, then welds in joint department, through the welding groove, makes the welding wire that melts flow into inside the welding groove, connects as an organic whole with annular joint department welding point, plays the effect of strengthening welding strength and sealed; the distance between the welding ends at the two ends is convenient to adjust by utilizing the screwed pipe and the external threaded pipe, so that the distance between ports between pipelines is adapted, the use flexibility is enhanced, and the adjusted external threaded pipe and the screwed pipe are kept in a stable sealing connection state through the mounting groove, the sealing piece and the locking ring.

Drawings

Fig. 1 is a schematic view of the overall structure of the embodiment of the present invention.

Fig. 2 is a schematic view of an inner side end structure of a screw joint end according to an embodiment of the present invention.

Fig. 3 is a schematic structural diagram of a position a in fig. 2 according to an embodiment of the present invention.

Fig. 4 is a schematic perspective view of a sealing member according to an embodiment of the present invention.

Fig. 5 is a schematic cross-sectional structure diagram of a sealing member according to an embodiment of the present invention.

1. Welding the end; 11. a tapered tube; 12. welding a groove; 2. a screwed pipe; 21. an outer tube; 22. an inner tube; 3. a bellows; 4. a seal member; 41. a rubber ring; 42. an inner ring block; 5. locking a ring; 6. an externally threaded tube; 7. a first screw hole; 8. a second screw hole; 9. and (4) mounting the groove.

Detailed Description

The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein. The present invention can be implemented or applied by other different specific embodiments, and various details in the present specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention.

Fig. 1 is the utility model discloses overall structure schematic diagram, fig. 2 are the utility model discloses an inboard end structure schematic diagram of spiro union end, fig. 3 are the utility model discloses in the figure 2 of embodiment a department's structure schematic diagram, fig. 4 do the utility model discloses a sealing member spatial structure schematic diagram, fig. 5 are the utility model discloses a sealing member section structure schematic diagram.

Referring to fig. 1 to 5, the utility model provides a double-layer tube pipe welding connects, include: welding end 1, spiro union pipe 2, sealing member 4, locking ring 5 and mounting groove 9.

Specifically, a screwed pipe 2 is welded on the inner side of the welding end 1, an outer pipe 21 is arranged on the outer side of the screwed pipe 2, an inner pipe 22 is welded on the inner side of the outer pipe 21, a sealing member 4 is installed on the inner side end face of the inner pipe 22, a rubber ring 41 is arranged on the outer side of the sealing member 4, an inner ring block 42 is arranged on the inner side of the rubber ring 41, an outer threaded pipe 6 is connected to the sealing member 4 in a sliding mode, a locking ring 5 is sleeved on the outer side of the outer threaded pipe 6 in a sliding mode, and two ends of the outer threaded pipe 6 are both screwed with the screwed pipe 2.

In this embodiment, the welding end 1 and the screwed pipe 2 are of an integral structure, so that the independent disassembly is convenient.

When welding, firstly, the welding end 1 at one end is welded and fixed with a pipeline, then the length of the external thread pipe 6 is adjusted in a rotating mode, then the position of the screwed pipe 2 at the other end is adjusted in a rotating mode, and then the pipeline at the other end is welded.

The outer side of the screwed pipe 2 is sleeved with a corrugated pipe 3 made of plastic, the outer diameter of the corrugated pipe 3 is smaller than the diameter of the inner side end of the welding end 1, and two ends of the corrugated pipe 3 are in elastic contact with the end face of the inner side of the welding end 1.

In this embodiment, the bellows 3 is provided as two independent sections, which is convenient for the locking ring 5 to be pulled away to one end when being connected, and then the bellows 3 plays a role of protecting the screwed pipe 2 and the externally threaded pipe 6 after being connected.

The outside of welding end 1 is provided with conical tube 11, and the narrow port of conical tube 11 is outwards to rectangular strip welding groove 12 has been seted up to conical tube 11's outer wall.

In this embodiment, the tapered pipe 11 facilitates direct insertion of pipes with different pipe diameters, and the welding groove 12 enhances the firmness of welding.

The medial extremity mouth of outer tube 21 is provided with first screw 7, and the ring body of locking ring 5 has seted up second screw 8 to first screw 7 is the same with 8 internal thread in the second screw.

In the present embodiment, the locking ring 5 is fixedly connected to the outer tube 21 by means of bolts and the first and second screw holes 7 and 8.

An installation groove 9 is formed between the inner side end openings of the outer pipe 21 and the inner pipe 22, the sealing element 4 is embedded in the installation groove 9, and the outer end of the sealing element 4 protrudes out of the groove opening of the installation groove 9; the inner ring block 42 and the rubber ring 41 are made of fluororubber, the inner ring block 42 and the rubber ring 41 are integrated, and the thickness of the inner ring block 42 is half of that of the rubber ring 41.

In this embodiment, after the sealing member 4 is mounted in the mounting groove 9, when the locking ring 5 presses the sealing member, the inner ring block 42 is pressed on the threaded portion between the inner pipe 22 and the outer threaded pipe 6, thereby achieving the sealing effect.

The welding end 1, the screwed pipe 2 and the locking ring 5 are all provided with a pair, the outer diameter of the locking ring 5 is the same as that of the screwed pipe 2, and the outer diameter of the screwed pipe 2 is smaller than the diameter of the end face of the inner side of the welding end 1.

The utility model discloses a double-deck pipe pipeline welded joint can effectively solve the welded joint that relates to in the background art patent document and can not connect the pipeline of different pipe diameters, and can't adjust self length in order to adapt to the problem of pipeline port interval, utilize the conical duct that the welding end includes to be convenient for peg graft the pipeline of the same or different pipe diameters at its both ends, make the pipeline port joint of waiting to connect at the outer wall of conical duct, then weld at the joint, through the welding groove, make the welding wire that melts flow into inside the welding groove, connect as an organic whole with annular joint department welding point, play and strengthen welding strength and sealed effect; the distance between the welding ends at the two ends is convenient to adjust by utilizing the screwed pipe and the external threaded pipe, so that the distance between ports between pipelines is adapted, the use flexibility is enhanced, and the adjusted external threaded pipe and the screwed pipe are kept in a stable sealing connection state through the mounting groove, the sealing piece and the locking ring.

Claims (7)

1. A double-layer pipe pipeline welded joint is characterized by comprising: welding end (1), the inboard welding of welding end (1) has spiro union pipe (2), and the outside of spiro union pipe (2) is provided with outer tube (21), and the inboard welding of outer tube (21) has inner tube (22), sealing member (4) are installed to the medial surface of inner tube (22), and the outside of sealing member (4) sets up to rubber ring (41) to the inboard of rubber ring (41) is provided with inner ring piece (42), the sliding connection of sealing member (4) has external screw thread pipe (6), and the outside sliding sleeve of external screw thread pipe (6) has locking ring (5) to the both ends of external screw thread pipe (6) all with spiro union pipe (2) spiro union.

2. The double-pipe pipeline welding joint according to claim 1, wherein a corrugated pipe (3) made of plastic is sleeved on the outer side of the screwed pipe (2), the outer diameter of the corrugated pipe (3) is smaller than the diameter of the inner end of the welding end (1), and two ends of the corrugated pipe (3) are in elastic contact with the end surface of the inner end of the welding end (1).

3. The double-layer pipe pipeline welding joint as recited in claim 1, characterized in that a conical pipe (11) is arranged outside the welding end (1), the narrow end of the conical pipe (11) faces outwards, and the outer wall of the conical pipe (11) is provided with a rectangular strip-shaped welding groove (12).

4. The double-pipe welding joint according to claim 1, wherein the inner side port of the outer pipe (21) is provided with a first screw hole (7), the ring body of the locking ring (5) is provided with a second screw hole (8), and the internal threads of the first screw hole (7) and the second screw hole (8) are the same.

5. The double-pipe pipeline welding joint as recited in claim 1, wherein a mounting groove (9) is formed between the inner side ports of the outer pipe (21) and the inner pipe (22), the sealing element (4) is embedded in the mounting groove (9), and the outer end of the sealing element (4) protrudes out of the opening of the mounting groove (9).

6. The double-layer pipe pipeline welding joint as recited in claim 1, wherein the inner ring block (42) and the rubber ring (41) are both made of fluororubber, the inner ring block (42) and the rubber ring (41) are integrated, and the thickness of the inner ring block (42) is half of that of the rubber ring (41).

7. The double-pipe welding joint according to claim 1, wherein a pair of the welding end (1), the screwed pipe (2) and the locking ring (5) is provided, and the outer diameter of the locking ring (5) is the same as that of the screwed pipe (2), and the outer diameter of the screwed pipe (2) is smaller than the diameter of the end face of the welding end (1) inside.

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