CN207246606U - Tensile force type pipe fitting - Google Patents

Abstract

The utility model provides a tension type pipe joint, which comprises a joint body, a nut, a sealing ring and a tension sleeve, and is suitable for large-diameter thin-walled pipes with an outer pipe diameter of 145-225mm and a wall thickness of 1.5-2.5mm. ; No welding, no flange, using a tension sleeve. The front end of the tension sleeve has a ring of seam. Under the condition of the inner cone of the nut, the tension sleeve can complete the cutting of the tension sleeve seam in the outer diameter of the connected pipe through the displacement of the tapered locking hole, so as to prevent the pipe joint from being connected to the pipe. It can be pulled out easily, and can be cut in by twisting half of the teeth at an angle of 45 degrees, forming a sealed pipeline for medium transportation. It has simple structure, reliable sealing, high pull-out resistance, and wide application.

Description

Pull type pipe joint

technical field

The utility model relates to a pipe joint, in particular to a tension type pipe joint, which is mainly used to be installed in a pipeline for conveying air, such as the pipeline can be connected with an air compressor.

Background technique

The pipe joint is a connection tool between pipes and a detachable connection point between components and pipes. It plays an indispensable and important role in pipe fittings, and it is one of the two main components of hydraulic pipelines. There are many types of pipe joints. Commonly used pipe joints can generally be divided into two types: hard pipe joints and hose joints. If it is divided according to the connection method of the pipe joint and the pipe, the hard pipe joint has three types: flare type, ferrule type and welding type, and the hose joint is mainly a buckle type hose joint.

The publication date is December 8, 2015, and the Chinese patent with the publication number CN204879137U discloses a leak-proof and corrosion-resistant bimetallic transition pipe joint, which belongs to the technical field of pipeline welding connection. An anti-leakage and anti-corrosion bimetallic transition pipe joint, which has a tubular structure, and is characterized in that it includes an inner transition layer and an outer wrapping anti-corrosion metal layer (40) of any one of aluminum, aluminum alloy, titanium or titanium alloy , the transition layer along the axial direction of the tube is sequentially formed by stacking and compounding annular structures made of aluminum-titanium-steel, aluminum alloy-titanium-steel, titanium-titanium-steel or titanium alloy-titanium-steel. The utility model uses the technology of explosive welding to process composite materials to metallurgically weld different single metal plates together to make them airtight, and process them into a transitional connection pipe joint structure that meets engineering needs. The utility model effectively prevents the leakage of the wave vortex cavity at the welding interface, improves the reliability of the high sealing characteristics of the transition pipe joint; effectively prevents the initiation of surface cracks, improves the fatigue performance and low-temperature impact resistance; improves the transition The durability of the joint; the structure is designed to insert a single metal tube into the counterbore for welding to achieve the role of fixing the position of the pipe fittings and facilitate welding construction. After the transition joint is welded and installed, no routine maintenance is required. The pipe joint is firmly installed, but the installation is complicated and cannot be disassembled.

The diameter of the existing pipes with cut-in seal and tension seal structure can only be 50mm in diameter at present, and those exceeding 50mm are usually flanged or welded, which has complex structure, complicated installation, inconvenient operation, and insufficient flexibility in use. . In the case of a thin wall, if the pipe diameter is large, the pipe wall will be deformed before cutting into the outer wall when cutting into the seal and tension seal, and the sealing effect cannot be achieved.

Utility model content

The purpose of the utility model is to overcome the above-mentioned deficiencies in the prior art, and provide a tension type pipe joint with a reasonable structural design, which has a simple structure, good sealing performance, and high pull-out resistance.

The technical solution adopted by the utility model to solve the above problems is: a tension type pipe joint, including a joint body, the outer walls of both ends of the joint body are provided with external threads, and the two ends of the joint body are provided with joint body through holes; It also includes nuts, sealing rings and tension sleeves; the through hole of the joint body is connected with a cylindrical hole, and the diameter of the first cylindrical hole is larger than the through hole of the joint body; the middle hole wall of the through hole of the joint body is formed A ring of bumps; the joint body is provided with a hexagonal head; the nut is provided with a nut through hole, and the nut through hole includes an internal thread part, a No. 2 cylindrical hole, and a tapered locking hole connected in sequence; The internal thread part of the nut is provided with an internal thread; the aperture of the No. 2 cylindrical hole is larger than the aperture of the internal thread part, and the maximum aperture of the tapered locking hole is smaller than the aperture of the No. 2 cylindrical hole. The tapered lock A ring of bosses is formed between the tight hole and the No. 2 cylindrical hole; the diameter of the tapered locking hole gradually decreases from the connection end with the No. 2 cylinder to be equal to the diameter of the connected pipe; the nut is set There is a hexagonal head; the sealing ring and the tension sleeve are distributed between one end of the joint body and the nut in turn, and the sealing ring is installed in the No. 1 cylindrical hole; the front end of the tension sleeve is provided with a ring stop, and the tension sleeve There is a groove at the rear end of the groove, and the groove and the joint body are clamped to fix the sealing ring in the No. 1 cylindrical hole; the joint body and the nut are connected by threads, and the stop of the tension sleeve is located between the nut and the connected Between the pipe walls of the pipes, the spigot is in contact with the hole wall of the tapered locking hole, and under the action of the hole wall of the tapered locking hole, it bends inwards and compresses the connected pipe so as to fix the connected pipe.

As a preference, the nut described in the utility model is a lock nut.

Preferably, the sealing ring of the present invention is a single sealing ring or a double sealing ring.

As a preference, the front end of the spigot described in the utility model is acute-angled.

As a preference, the range of the included angle between the two busbars in the axial section of the tapered locking hole of the utility model is between 10°-30°.

As a preference, the diameter of the through hole of the joint body of the present invention ranges from 6 to 200 mm.

Preferably, the diameter of the through hole of the joint body of the present invention is equal to the minimum diameter of the tapered locking hole.

Preferably, the outer diameter of the connected pipe in the present invention is 145-225mm, and the wall thickness of the connected pipe is 1.5-2.5mm.

Compared with the prior art, the utility model has the following advantages and effects: it is suitable for large-diameter thin-walled pipes with an outer pipe diameter of 145-225mm and a wall thickness of 1.5-2.5mm, without welding and without flanges; Tension sleeve, the front end of the tension sleeve has a circle of seam, the tension sleeve under the condition of the inner cone of the nut through the displacement of the tapered locking hole to complete the cutting of the tension sleeve seam in the outer diameter of the connected pipe to prevent the pipe joint The unplugging of the connected pipeline forms a sealed pipeline for medium transportation, which has a simple structure, reliable sealing, high resistance to pulling out, and a wide range of applications. The O-ring is a fill-in type, which can play a reliable sealing role. The tolerance of the O-ring does not affect the reliability of the O-ring; the cut-in sleeve is an anti-pull-out part to prevent the pipe from being pulled out. And the utility model can realize cutting in by twisting half a tooth at an angle of 45 degrees.

Description of drawings

Fig. 1 is a schematic structural view of an embodiment of the utility model.

Fig. 2 is a schematic cross-sectional structure diagram of the joint body of the embodiment of the present invention.

Fig. 3 is a side view schematic diagram of the joint body of the embodiment of the utility model.

Fig. 4 is a schematic cross-sectional structure diagram of a nut in an embodiment of the present invention.

Fig. 5 is a side view structural schematic diagram of the nut of the embodiment of the utility model.

Fig. 6 is a schematic cross-sectional structure diagram of the tension sleeve of the embodiment of the utility model.

Fig. 7 is a schematic side view of the tension sleeve of the embodiment of the utility model.

Fig. 8 is a schematic cross-sectional structure diagram of a single sealing ring in an embodiment of the present invention.

Fig. 9 is a side view schematic diagram of the single sealing ring of the embodiment of the utility model.

Fig. 10 is a schematic cross-sectional structure diagram of a double sealing ring according to an embodiment of the present invention.

Fig. 11 is a side view structural schematic diagram of the double sealing ring of the embodiment of the utility model.

Detailed ways

The utility model will be further described in detail below in conjunction with the accompanying drawings and examples. The following examples are explanations of the utility model and the utility model is not limited to the following examples.

Example.

Referring to FIG. 1 to FIG. 11 , the tension pipe joint in this embodiment includes a joint body 1 , a nut 4 , a sealing ring 2 and a tension sleeve 3 .

In this embodiment, the outer walls of both ends of the joint body 1 are provided with external threads 12 , and the two ends of the joint body 1 are also provided with joint body through holes 6 . The through hole 6 of the joint body is connected with a cylindrical hole 7 , and the diameter of the first cylindrical hole 7 is larger than that of the through hole 6 of the joint body. Both the joint body 1 and the nut 4 are provided with a hexagonal head 9 for installing the joint body 1 , the nut 4 and the pipe 5 with a wrench. A ring of bumps 17 is formed on the middle hole wall of the through hole 6 of the joint body, and the bumps 17 play a role in positioning the pipe 5 .

The nut 4 in this embodiment is a lock nut. The nut 4 is provided with a nut through hole, and the nut through hole includes an internal thread portion 14 , a second cylindrical hole 15 , and a tapered locking hole 8 connected in sequence. The internal thread 13 is provided on the internal thread part 14 . The aperture of the No. 2 cylindrical hole 15 is greater than the aperture of the internal thread portion 14, and the maximum aperture of the tapered locking hole 8 is smaller than the aperture of the No. 2 cylindrical hole 15. Between the tapered locking hole 8 and the No. 2 cylindrical hole 15 A ring of bosses 16 is formed. The aperture of the tapered locking hole 8 gradually decreases to be equal to the aperture of the connected pipeline 5 from the connecting end with the second cylindrical hole 15 . The outer diameter of the connected pipeline 5 is 145-225mm, the wall thickness is 1.5-2.5mm, and the common value of the wall thickness is 2mm.

In this embodiment, the sealing ring 2 and the tension sleeve 3 are sequentially distributed between one end of the joint body 1 and the nut 4, and the sealing ring 2 can be a single sealing ring or a double sealing ring. The sealing ring 2 is installed in the No. 1 cylindrical hole 7 . The front end of the tension sleeve 3 is provided with a circle of seam 10, and the front end of the seam 10 is acute-angled. The rear end of the tension sleeve 3 is provided with a groove 11, and the groove 11 is engaged with the joint body 1 to fix the sealing ring 2 in the No. 1 cylindrical hole 7. The joint body 1 and the nut 4 are connected by threads, the spigot 10 of the tension sleeve 3 is between the nut 4 and the pipe wall of the connected pipeline 5, the spigot 10 is in contact with the hole wall of the tapered locking hole 8, and The hole wall of the tapered locking hole 8 bends inwards under the action.

In this embodiment, the angle between the two busbars in the 8-axis section of the tapered locking hole ranges from 10° to 30°. The aperture of the joint body through hole 6 is equal to the minimum aperture of the tapered locking hole 8 .

A connection method of a tension type pipe joint, the steps are as follows: the connected pipe 5 passes through the nut through hole, the tension sleeve 3, the sealing ring 2, and the joint body 1 in sequence, and the connected pipes 5 on both sides are first fixed on the two ends of the connecting head 1. end, and then turn the nut 4 to fix the sealing ring 2 and the tension sleeve 3; with the displacement of the tapered locking hole 8 of the nut 4, the seam 10 bends inward under the action of the hole wall of the tapered locking hole 8 Compress the connected pipe to fix the connected pipe to prevent the connected pipe from being pulled out of the pipe joint. The utility model can realize cutting by twisting half teeth at an angle of 45 degrees.

In addition, it should be noted that the specific embodiments described in this specification may be different in parts, shapes and names of parts, and the above content described in this specification is only an illustration of the structure of the present invention. All equivalent changes or simple changes based on the structure, features and principles described in the utility model patent concept are included in the protection scope of the utility model patent. Those skilled in the technical field to which the utility model belongs can make various modifications or supplements to the described specific embodiments or adopt similar methods to replace them, as long as they do not deviate from the structure of the utility model or exceed the definition defined in the claims scope, all should belong to the protection scope of the present utility model.

Claims (8)

1. a kind of tensile force type pipe fitting, including fittings body, the both ends outer wall of the fittings body is provided with external screw thread, the fittings body It is provided at both ends with fittings body through hole, it is characterised in that：Further include nut, sealing ring and pulling sleeve；The fittings body through hole connection There is No.1 cylindrical hole, the aperture of the No.1 cylindrical hole is more than fittings body through hole；The middle hole wall of the fittings body through hole It is upper to form a circle convex block；The fittings body is provided with turret head；The nut is provided with nut through hole, and the nut through hole includes Sequentially connected internal thread part, No. two cylindrical holes, taper lock tieholen；The internal thread part of the nut is provided with internal thread；Institute The aperture for stating No. two cylindrical holes is more than the aperture of internal thread part, and the maximum diameter of hole of the taper lock tieholen is less than No. two cylinders The aperture in hole, forms a circle boss between the taper lock tieholen and No. two cylindrical holes；The aperture of the taper lock tieholen from Start to taper into No. two cylindrical connecting pins and equal by the aperture in connecting leg road；The nut is provided with turret head； The sealing ring and pulling sleeve are sequentially distributed between one end of fittings body and nut, and sealing ring is installed on No.1 cylindrical hole It is interior；The front end of the pulling sleeve is provided with a circle seam allowance, and the rear end of the pulling sleeve sets fluted, the groove and fittings body Clamping fixes sealing ring in No.1 cylindrical hole；The fittings body and nut are connected through a screw thread, the seam allowance of the pulling sleeve Positioned at nut and by between the tube wall in connecting leg road, seam allowance is contacted with the hole wall of taper lock tieholen, and in the hole wall of taper lock tieholen The compression that curves inwardly under effect is by connecting leg road so as to being fixed by connecting leg road.

2. tensile force type pipe fitting according to claim 1, it is characterised in that：The nut is locking nut.

3. tensile force type pipe fitting according to claim 1, it is characterised in that：The sealing ring is single sealing ring or double density Seal.

4. tensile force type pipe fitting according to claim 1, it is characterised in that：The front end of the seam allowance is acute angle shape.

5. tensile force type pipe fitting according to claim 1, it is characterised in that：Described two busbares in cone locking hole axle section Between angular range be 10 ° -30 ° between.

6. tensile force type pipe fitting according to claim 1, it is characterised in that：The pore diameter range of the fittings body through hole is 6- 200mm。

7. tensile force type pipe fitting according to claim 1, it is characterised in that：The aperture of the fittings body through hole and taper lock The minimum-value aperture of tieholen is equal.

8. tensile force type pipe fitting according to claim 1, it is characterised in that：The outside diameter by connecting leg is 145-225mm, It is 1.5-2.5mm by the wall thickness of connecting leg.