CN211315442U - A pipeline connection system for fluid transportation - Google Patents

Abstract

The utility model provides a pipeline connection system for fluid conveying, comprising: a spiral corrugated pipe; a corrugated straight pipe at the pipe end, the two ends of the corrugated straight pipe at the pipe end are provided with threads; The connecting head includes a straight-through joint, an elbow joint and a three-way joint, and the outer ends of the straight-through joint, the elbow joint and the three-way joint are provided with connecting threads, and the straight-through joint is used for the adjacent pipe end corrugated straight pipe and pipe end corrugated pipe. The straight connection between straight pipes or spiral corrugated pipes, the elbow joint is used for the curved connection between the adjacent pipe end corrugated straight pipe and the pipe end corrugated straight pipe or the spiral corrugated pipe, the three-way joint is used for The T-connection between the corrugated straight pipe at the adjacent pipe end and the corrugated straight pipe or spiral corrugated pipe at the pipe end. The pipeline connection system for fluid conveying provided by the utility model has the advantages of simple structure, convenient operation, high reliability and convenient popularization.

Description

A pipeline connection system for fluid transportation

technical field

The utility model relates to the field of stainless steel pipeline connection for fluid transportation, and is especially suitable for the connection of stainless steel pipeline systems for drinking water, tap water, hot water and other water supplies, and also suitable for pipeline system connection in the fields of gas, fuel and other fields of oil and gas.

Background technique

In the fields of drinking water, tap water, hot water, gas and other water supply and gas supply, thin-walled stainless steel pipes are gradually replacing carbon steel pipes and plastic pipes due to their strong corrosion resistance, long service life and high reliability, and are more and more widely used. . Due to the low working pressure and cost factors of such thin-walled stainless steel pipes, the wall thickness is generally controlled below 2mm.

Due to the thin wall thickness, this type of stainless steel pipe cannot be connected with threaded joints like carbon steel pipe. Therefore, the existing thin-walled stainless steel pipe connection methods often use connection methods such as welded joint connection or compression connection, rather than based on threaded connection methods. GB/T29038-2012 Technical Specifications for Thin-walled Stainless Steel Pipelines lists the compression connection, ring compression connection, flexible thread connection, compression connection, clip connection, butt argon arc welding connection, socket argon connection in detail Arc welding connection, ring expansion connection, groove connection, flange connection and other pipeline connection technologies. The above connection methods are all based on welding-type joint connection or compression-type connection method, which have their own shortcomings, such as bulky field installation equipment, inability to disassemble and assemble joints, complex structure, high cost, and low reliability.

The connection method using threaded connection is still the most convenient and reliable connection method for pipelines. However, since the thin-walled stainless steel pipe cannot be sheathed with standard wires, the method of corrugating the end of the thin-walled stainless steel pipe to realize the spiral connection is the present invention. A feasible solution provided. Checking the existing domestic and foreign technologies and related patents, no corrugated helical connection joints and devices that are the same or similar to the present technology are used. At the same time, the technical scheme and system provided by the present invention can not only realize the straight pipe and the straight pipe, but also facilitate the connection between the straight pipe and the corrugated pipe, and the corrugated pipe and the corrugated pipe. After checking related technologies and patents, no similar technology can be found. It is also suitable for connecting joints and devices of straight pipes and corrugated pipes.

Utility model content

Aiming at the above deficiencies in the prior art, the utility model provides a pipeline connection system for fluid transportation, which is simple in structure, convenient in operation, high in reliability and convenient for popularization.

In order to achieve the above-mentioned purpose of the utility model, the technical scheme adopted by the present utility model is:

A pipeline connection system for fluid transportation, comprising:

Spiral bellows;

The pipe end corrugated straight pipe has threads at both ends of the pipe end corrugated straight pipe;

A screw-type connector, the screw-type connector includes a straight-through joint, an elbow joint and a three-way joint, and connecting threads are provided on the outside of the ends of the straight-through joint, the elbow joint and the three-way joint, and the straight-through joint is used for adjacent The direct connection between the pipe end corrugated straight pipe and the pipe end corrugated straight pipe or the spiral corrugated pipe, the elbow joint is used for the turning between the adjacent pipe end corrugated straight pipe and the pipe end corrugated straight pipe or the spiral corrugated pipe The tee joint is used for the T-type connection between the corrugated straight pipe at the adjacent pipe end and the corrugated straight pipe or spiral corrugated pipe at the pipe end;

A thread nut, a stop washer and a sealing ring with internal threads are arranged in the thread nut, the stop washer and the sealing ring are fitted and connected with the pipe end corrugated straight pipe or the spiral corrugated pipe, the said The screw nut is provided with an inner thread to be connected with the screw type connector.

As an improvement, the end of the sealing ring away from the stop washer is externally chamfered to form an external conical surface, and each inner hole end of the screw-type connector is internally chamfered to form an internal conical surface.

As an improvement, the chamfering angles of the outer and inner conical surfaces are the same to achieve better sealing.

As an improvement, the chamfer angle of the outer cone surface and the inner cone surface is 45°-75°.

As an improvement, the helical direction of the helical corrugated pipe and the pipe end corrugated straight pipe is not limited to left-handed or right-handed.

As an improvement, the spiral corrugated pipe is a 4-meter or 6-meter fixed-length full spiral corrugated pipe, the wall thickness of the spiral corrugated pipe is 0.8-2mm, and the diameter of the spiral corrugated pipe is 12.7-108mm. The spiral corrugated pipe should be annealed And meet the manual bending requirements.

As an improvement, the corrugated straight pipe at the pipe end is a straight pipe with a fixed length of 4 meters or 6 meters, and its wall thickness is in the range of 0.8-2 mm, and the pipe diameter is in the range of 12.7-108 mm. The pipe end corrugated straight pipe has different pipe diameters. The corresponding wave pitch and wave depth of the corrugated sections at both ends are set to be consistent with the corrugation of the spiral corrugated pipe of the same specification.

As an improvement, the spiral corrugated pipe is connected with the outermost pipe end corrugated straight pipe.

As an improvement, the helical direction of the helical corrugated pipe and the pipe end corrugated straight pipe is opposite to that of the screw nut, so as to achieve better stopping and loosening of the stop washer.

The beneficial effects of the present utility model are:

The utility model adopts the sealing method of the screw type connection joint, the end face of the sealing ring and the end face of the screw type connection head are matched with an oblique angle of 45-75°, and the sealing performance is highly reliable and the pressure bearing capacity is strong. The internal thread of the stop washer is matched with the corrugated end of the spiral corrugated pipe or the corrugated straight pipe at the pipe end, so as to realize the threaded fastening, and the fastening is more reliable. The corrugated straight pipe at the pipe end and the spiral corrugated pipe are connected by the spiral connection joint by the method of screw connection joint, which can be used in combination in the field construction, and the corrugated pipe can be cut off according to the required length for short distance. Therefore, compared with the prior art, there is no need for bulky hydraulic pressing equipment or welding equipment on site, and the convenience of on-site operation is greatly improved. The helical corrugated tube can be bent manually, so that bending at small distances can reduce the use of elbows.

Description of drawings

Fig. 1 is the structural representation of the utility model;

2 is an enlarged view of the structure of the stop washer and the sealing ring of the utility model;

Reference number comparison table:

1- Spiral corrugated pipe, 2- Pipe end corrugated straight pipe, 3- Spiral joint, 31- Straight joint, 32- Elbow joint, 33- Tee joint, 4- Thread nut, 5- Stop washer, 6- Sealing ring.

Detailed ways

The specific embodiments of the present utility model will be further described below in conjunction with the accompanying drawings. Wherein the same parts are denoted by the same reference numerals.

It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to the directions in the drawings, and the words "inner" and "outer" ” refer to directions towards or away from the geometric center of a particular part, respectively.

In order to make the content of the present utility model easier to understand clearly, the technical solutions in the embodiments of the present utility model will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present utility model.

As shown in Figures 1 and 2, a pipeline connection system for fluid transportation includes:

Spiral bellows;

The pipe end corrugated straight pipe has threads at both ends of the pipe end corrugated straight pipe;

A screw-type connector, the screw-type connector includes a straight-through joint, an elbow joint and a three-way joint, and connecting threads are provided on the outside of the ends of the straight-through joint, the elbow joint and the three-way joint, and the straight-through joint is used for adjacent The direct connection between the pipe end corrugated straight pipe and the pipe end corrugated straight pipe or the spiral corrugated pipe, the elbow joint is used for the turning between the adjacent pipe end corrugated straight pipe and the pipe end corrugated straight pipe or the spiral corrugated pipe The tee joint is used for the T-type connection between the corrugated straight pipe at the adjacent pipe end and the corrugated straight pipe or spiral corrugated pipe at the pipe end;

A thread nut, a stop washer and a sealing ring with internal threads are arranged in the thread nut, the stop washer and the sealing ring are fitted and connected with the pipe end corrugated straight pipe or the spiral corrugated pipe, the said The screw nut is provided with an inner thread to be connected with the screw type connector.

The end of the sealing ring away from the stop washer is subjected to an outer chamfering process to form an outer conical surface, and each inner hole end of the screw type connector is internally chamfered to form an inner conical surface.

The chamfering angles of the outer conical surface and the inner conical surface are the same and are arranged to fit.

The chamfer angle of the outer cone surface and the inner cone surface is 45°-75°.

The helical direction of the spiral corrugated pipe and the pipe end corrugated straight pipe is not limited to left-handed or right-handed.

The spiral corrugated pipe is a 4-meter or 6-meter fixed-length full spiral corrugated pipe. The wall thickness of the spiral corrugated pipe is 0.8-2mm, and the diameter of the spiral corrugated pipe is in the range of 12.7-108mm. The spiral corrugated pipe should be annealed and meet the requirements of manual operation. Bending requirements.

The corrugated straight pipe at the pipe end is a straight pipe with a fixed length of 4 meters or 6 meters, and its wall thickness is in the range of 0.8-2 mm, and the diameter of the pipe is in the range of 12.7-108 mm. The corrugated straight pipe at the pipe end has different diameters. The wave pitch and wave depth corresponding to the segment setting are consistent with the corrugation of the spiral corrugated pipe of the same specification.

During the use of the device, the spiral corrugated pipe 1 can be dimensioned on site as required. The size of the pipe end corrugated straight pipe 2 can be divided into two types. The length of the long pipe is twice that of the short pipe. The spiral corrugated pipe 1 can be bent at multiple angles according to the angle of the bend.

As shown in FIG. 2 , the interface consists of a screw nut 4 , a stop washer 5 , a sealing ring 6 and a screw-type connector 3 . The inner thread of the thread nut 4 is connected with the end of the screw type connector 3 in a matched manner. The thread nut 4 is provided with a stepped inner hole and a through hole (with a tapered surface), and the through hole can be matched with the spiral corrugated pipe 1. The said stop washer 5 and the sealing ring 6 are assembled into the inner hole of the screw nut 4 , and the inner teeth of the stop washer 5 and the sealing ring 6 are matched with the thread of the spiral bellows 1 .

In the specific implementation, the manufacturer needs to produce the spiral corrugated pipe 1 and the pipe end corrugated straight pipe 2 in the factory according to the parameter requirements, and can produce 4 meters or 6 meters according to the market. The corrugated straight pipe at the pipe end is combined with 2, and the pipe end is connected by a spiral straight-through joint 31. If there is a branch connected by an elbow joint 32 and a three-way joint 33, and the length of the terminal pipeline is less than 4 meters or 6 meters, Cut the spiral corrugated tube 1. In the short-distance range, especially the site that needs to turn, the spiral corrugated pipe 1 can be cut, and the spiral corrugated pipe 1 can be connected with the straight joint 31, and the spiral corrugated pipe 1 can be directly bent at the corner. The head joint 32, the three-way joint 33 or the four-way joint are branched. When installing the joint during construction, first put the screw nut 4 on the spiral corrugated pipe 1 or the pipe end corrugated straight pipe 2, and then screw in the stop washer 5 and the sealing ring 6, and the spiral corrugated pipe 1 or the pipe end corrugated straight pipe 2. The end of the pipe should protrude a part of the sealing ring 6, and then connect the screw nut 4 with the screw connection. Finally, use a wrench to lock to complete the final connection.

The above are only the preferred embodiments of the present invention patent, and are not intended to limit the present invention patent. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention patent shall be Included within the scope of protection of this utility model patent.

Claims (7)

1. A fluid transfer line connection system, comprising:

a helical bellows;

the pipe end corrugated straight pipe is provided with threads at two ends;

the spiral connector comprises a straight connector, an elbow connector and a three-way connector, connecting threads are arranged on the outer sides of the ends of the straight connector, the elbow connector and the three-way connector, the straight connector is used for directly connecting adjacent pipe end corrugated straight pipes with pipe end corrugated straight pipes or spiral corrugated pipes, the elbow connector is used for turning connection between the adjacent pipe end corrugated straight pipes and the pipe end corrugated straight pipes or spiral corrugated pipes, and the three-way connector is used for T-shaped connection between the adjacent pipe end corrugated straight pipes and the pipe end corrugated straight pipes or spiral corrugated pipes;

the screw nut is provided with a stop washer and a sealing ring with internal threads, the stop washer and the sealing ring are attached to be arranged and connected with a pipe end corrugated straight pipe or a spiral corrugated pipe, and the screw nut is provided with internal threads and is connected with a spiral connector.

2. A fluid conveying piping connection system according to claim 1, wherein: the end part of the sealing ring far away from the stop washer is subjected to outer chamfering treatment to form an outer conical surface, and each inner hole end of the spiral connector is subjected to inner chamfering to form an inner conical surface.

3. A fluid-conveying piping connection system as set forth in claim 2, wherein: the chamfer angles of the outer conical surface and the inner conical surface are the same and are arranged in a fitting mode.

4. A fluid-conveying piping connection system according to claim 3, wherein: the chamfer angle of the outer conical surface and the inner conical surface is 45-75 degrees.

5. A fluid conveying piping connection system according to claim 1, wherein: the spiral direction of the spiral corrugated pipe and the pipe end corrugated straight pipe is not limited to left-handed rotation or right-handed rotation.

6. The fluid transfer line connection system of claim 5, wherein: the spiral direction of the spiral corrugated pipe and the pipe end corrugated straight pipe is opposite to the spiral direction of the screw thread nut.

7. The fluid transfer line connection system of claim 5, wherein: the spiral corrugated pipe is connected with the pipe end corrugated straight pipe on the outermost side.

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