TWI788973B - connecting device - Google Patents

Abstract

A connecting device, comprising two receiving parts spaced apart from each other along an axis direction, a bellows made of metal material and arranged between the receiving parts along the axis direction, and two respectively fixed on the receiving parts along the axis direction. Adapting flanges on the outside of the receiving parts, and a plurality of tie rods arranged in a ring shape at intervals along the circumferential direction of the adapting flanges. The corrugated tube includes a plurality of bent sections that are connected to each other and can expand and contract along the axial direction, and two extension sections extending outward from the two outermost bent sections. Each pull rod extends along the axis, and its two ends are respectively fixed on the adapter flanges. The bellows can expand and contract along the axial direction, thereby absorbing the deformation of the pipe fittings in the axial direction, and has the advantages of corrosion resistance, high temperature resistance and pressure resistance.

Description

connecting device

The invention relates to a connecting device, in particular to a connecting device for connecting pipes.

Fiber-reinforced plastic (FRP, Fiber-reinforced plastic) pipe fittings are made of resin and glass fiber through a cross-winding process, which has the advantages of high structural strength of the pipe wall and corrosion resistance. When connecting different pipe fittings, it is necessary to connect these pipe fittings through a connecting device. Because these pipe fittings will encounter thermal expansion and contraction, pipeline pulling, strong water pressure, etc., there are often radial and radial gaps between the pipe fittings. Axial force is applied. In addition, when the pipe fittings are exposed to the sun or the environment is low temperature and cause thermal expansion and contraction, the pipe fittings will stretch and deform. Usually, a connecting device is used to connect the pipe fittings on both sides to absorb the heat expansion and cooling between the pipe fittings. The amount of deformation caused by shrinkage, and achieve the effect of tightly connecting pipe fittings without leakage.

It can be seen from the above that the connection device should have high strength, corrosion resistance, and can effectively absorb the expansion and contraction deformation between the two pipes. The current practice is to install a U-shaped pipe made of the same material as the pipes and connected to the pipes at both ends. Connector, with U-shaped connector two The sides are coaxial with the pipe fittings, even if the pipe fittings expand and contract axially, the U-shaped connector will move accordingly without causing damage, and it can effectively absorb the expansion and contraction deformation between the two pipe fittings. However, the U-shaped connector cannot connect the pipes along the same axis, the space required for installation is large, and an additional intermediate support structure is required to maintain, and it does not have the ability to withstand high-frequency vibrations. When the pipes are installed When near the pump, the U-shaped connectors may be damaged due to high-frequency vibration, so there is still a lot of room for improvement in this connection method.

Therefore, the purpose of the present invention is to provide a connecting device capable of absorbing displacement vibration, high durability and long service life.

Therefore, the connecting device of the present invention comprises two receiving parts coaxially arranged at intervals along an axis direction, a bellows made of metal material and arranged between the receiving parts along the axis direction, and two receiving parts along the axis direction. Adaptive flanges respectively fixed on the outer sides of the receiving parts, and a plurality of tie rods arranged annularly at intervals along the circumferential direction of the adapter flanges. The corrugated tube includes a plurality of bent sections connected to each other so as to expand and contract along the axial direction, and two extension sections extending outward from the two outermost bent sections to abut against the receiving parts respectively. Each pull rod extends along the axis, and its two ends are respectively fixed on the adapter flanges.

The effect of the present invention is that the bellows can expand and contract along the axial direction, thereby absorbing the deformation of the pipes in the axial direction, and can coaxially connect the Pipe fittings can greatly reduce the space required for installation, without the need for additional support structure maintenance, and have the ability to withstand high-frequency vibrations. In addition, the bellows are made of metal, which has the advantages of corrosion resistance, high temperature resistance and pressure resistance. Therefore, durability and service life can be improved. Not only that, the bellows made of metal also has better strength, which can overcome the known problems.

1: Undertake parts

11: end pipe

12: Fixed ring piece

2: Bellows

21: Bending section

22: Extended section

3: interlayer sheet

4: Adaptive flange

41: Main body

42: Inner edge

43: Outer edge

5: Tie rod

51: gusset

52: rod body

53: spherical washer

6: Gasket

7: mask

A: Axial direction

B: hatching

Other characteristics and effects of the present invention will be clearly presented in the implementation manner with reference to the drawings, wherein: Fig. 1 is a side view sectional view illustrating an embodiment of the connecting device of the present invention; and Fig. 2 is a front view sectional view Fig. 1 illustrates the front view sectional state viewed from the B-B section line in Fig. 1, wherein Fig. 2 does not show a plurality of rod bodies and a plurality of spherical washers.

Referring to Fig. 1 and Fig. 2, an embodiment of the connecting device of the present invention includes two receiving parts 1 coaxially arranged at intervals along an axis direction A, and a receiving part 1 arranged between the receiving parts 1 along the axis direction A The corrugated pipes 2 and 2 respectively abut against the outer sides of the receiving parts 1 along the axial direction A and the ring-shaped interlayer sheets 3 and 2 respectively abut against the outer sides of the interlayer sheets 3 along the axial direction A and are connected to the receiving parts. The adapter flange 4 fixedly connected to the part 1, eight tie rods 5 arranged annularly at intervals from each other along the circumferential direction of the adapter flanges 4, plural numbers arranged on the adapter flanges 4 and the tie rods 5, and a cover 7 that is fixed on one of the receiving parts 1 and surrounds in the circumferential direction to cover the bellows 2. In this example, The receiving parts 1 , the bellows 2 , and the adapter flanges 4 are arranged coaxially along the axial direction A.

Each receiving member 1 includes an end tube 11 set on the corrugated tube 2 , and a fixing ring piece 12 surrounding the end tube 11 and fixed on the corresponding adapter flange 4 by screw locking. Both ends of the end pipe 11 in the axial direction A contact the bellows 2 and the interlayer sheet 3 respectively, and the fixing ring piece 12 is fixed on the outer peripheral surface of the end pipe 11 by welding, and the outer surface Leaning against the sandwich piece 3, this fixing method allows the end pipe 11 and the fixing ring piece 12 to touch the sandwich piece 3 evenly, so that gaps between the fixing ring piece 12 and the sandwich piece 3 can be avoided , and then prevent the fixed ring piece 12 from being deformed due to the aforementioned gap under repeated use, causing corrosive fluid to enter the gap generated by the deformation, causing corrosion damage. In this embodiment, the end pipe 11 located on the inner side and thus requiring high corrosion resistance is made of Inconel 625 alloy (Inconel 625) or titanium alloy, and the fixing tube 11 located on the outer side does not require high corrosion resistance. The ring piece 12 is made of SUS316 stainless steel. This configuration makes the receiving part 1 not entirely made of Inconel 625 alloy or titanium alloy, thereby reducing the manufacturing cost and still maintaining sufficient corrosion resistance.

The bellows 2 includes a plurality of bent sections 21 connected to each other along the axial direction A, and two extension sections 22 extending outward from the two outermost bent sections 21 to abut against the end pipes 11 respectively. Each extension section 22 is sheathed by the corresponding end pipe 11 , and the bending section 21 connected to the extension section 22 also partially touches the end pipe 11 . In this embodiment, the bellows 2 is made of Inconel 625 alloy. These bending sections 21 can be in the It expands and contracts in the axial direction A, and has the advantages of corrosion resistance, high temperature resistance, and pressure resistance. Each interlayer piece 3 is sandwiched between the corresponding receiving part 1 and the corresponding adapter flange 4 along the axial direction A, and flatly touches the end pipe 11 and the fixing ring piece 12 of the corresponding receiving part 1 . In this embodiment, the interlayer sheet 3 is made of polytetrafluoroethylene (PTFE, commonly known as Teflon).

Each adapter flange 4 includes a main body portion 41 extending along the axial direction A, an inner edge portion 42 extending circumferentially outward from the main body portion 41 and touching the corresponding interlayer sheet 3, and an inner edge portion 42 formed by the main body portion 41 The main body portion 41 extends circumferentially outward and has an outer edge portion 43 that is spaced apart from the inner edge portion 42 along the axial direction A. As shown in FIG. In this embodiment, the adapter flange 4 is made of fiber-reinforced plastic (FRP, Fiber-reinforced plastic), and the outer edge portion 43 can be connected to the pipe fitting through screw locking. The outer edge portions 43 of the adapter flanges 4 can be respectively connected with two different pipe fittings (not shown in the figure), so as to make the two pipe fittings communicate with each other.

Each pull rod 5 includes two gusset plates 51 respectively fixed on the inner end edges 42 in a screw-locking manner, and one through the gusset plates 51 along the axial direction A and fixed on the gusset plates 51 The rod body 52 on the top, and four spherical washers 53 which are pierced by the rod body 52 and abut against the gusset plates 51 . Each gusset plate 51 is located on the outside of the corresponding inner edge portion 42, and is fixed together with the inner edge portion 42, the corresponding fixing ring piece 12, and the corresponding gasket 6 through the same bolt, and in this In the embodiment, the gusset plate 51 is made of SUS316 stainless steel. The spherical washers 53 correspond to the equal gussets in groups of two 51, the two spherical washers 53 of each group are respectively located on the inner and outer sides of the corresponding gusset plate 51 along the axial direction A. The spherical washer 53 is deformed by the force along the axis direction A, and generates a restoring force through its own hemispherical structure, thereby resisting vibration along the axis direction A, and increasing tightness and looseness ability. Limiting effects can be generated through the pull rods 5 to avoid excessive axial displacement between the connected pipes.

In this embodiment, the spacers 6 are made of Inconel 625 alloy, each spacer 6 is located between the corresponding gusset 51 and the corresponding inner edge 42, and is connected to the gusset 51 , the inner edge portion 42, and the corresponding fixing ring piece 12 are fixed together through the same bolt. The gasket 6 can increase the equivalent thickness to prevent the glass fiber reinforced plastic surfaces of the adapter flanges 4 from being damaged due to scratches or stress concentration during the fastening of the bolts. The cover 7 is fixed on the outer peripheral surface of the end pipe 11 of one of the receiving parts 1 , and surrounds and covers the bent sections 21 in the circumferential direction, so as to protect the bellows 2 .

To sum up, the present invention can achieve the position-limiting function and absorb the axial displacement through the tie rods 5. The bellows 2 is scalable and can absorb vibrations, and the movement in the axial direction A due to sun exposure and other reasons The amount of deformation produced, each receiving part 1 welds the fixed ring piece 12 made of SUS316 stainless steel to the end pipe 11 made of Inconel 625 alloy or titanium alloy, which can reduce the cost while considering the corrosion resistance. And it can touch the corresponding interlayer sheet 3 evenly, avoiding the deformation of the fixing ring sheet 12 under repeated use, so the purpose of the present invention can indeed be achieved.

But what is described above is only an embodiment of the present invention, and should not be used as The scope of implementation of the present invention is limited, and all simple equivalent changes and modifications made according to the patent scope of the present invention and the content of the patent specification are still within the scope covered by the patent of the present invention.

1: Undertake parts

11: end pipe

12: Fixed ring piece

2: Bellows

21: Bending section

22: Extended section

3: interlayer sheet

4: Adaptive flange

41: Main body

42: Inner edge

43: Outer edge

5: Tie rod

51: gusset

52: rod body

53: spherical washer

6: Gasket

7: mask

A: Axial direction

B: hatching

Claims (7)

A connecting device, comprising: two receiving parts, arranged coaxially and spaced apart from each other along an axis direction, each receiving part includes an end tube, and a fixed ring piece surrounding the end tube, and the fixed ring piece is fixed to the end tube by welding The outer peripheral surface of the end pipe; a bellows, made of metal material and arranged between the receiving parts along the axis, the bellows includes a plurality of bending sections connected to each other and can be stretched along the axis, and 2. Extend outwards from the two outermost bent sections to contact the extension sections of the receiving parts respectively. Each extension section is sleeved by the corresponding end pipe; 2. Adaptive flanges are respectively fixed on the On the outside of the adapters, each adapter flange and the corresponding fixed ring piece are screwed and fixed; a plurality of tie rods are arranged in a ring shape at intervals along the circumference of the adapter flanges, and each tie rod is arranged along the circumference of the adapter flanges. The axial direction extends, and the two ends are respectively fixed on the adapter flanges, and the pull rod includes two gusset plates respectively fixed on the adapter flanges in a screw-locking manner, and one passes through the adapter flanges along the axis direction. A rod body fixed to the gusset plates, and a plurality of spherical washers pierced by the rod body and abutting against the gusset plates; and two interlayer sheets sandwiched between the receiving parts and between the adapter flanges, each interlayer sheet is attached to the end pipe and the fixing ring piece of the corresponding receiving piece, and is screwed between the receiving piece and the corresponding adapter flange. The connecting device according to claim 1, wherein the bellows is made of Inconel 625 alloy. The connecting device as claimed in claim 1, wherein the end pipe of each receiving piece is Made of Inconel 625 alloy or titanium alloy, the fixed ring piece is made of SUS316 stainless steel. The connecting device as claimed in claim 1, wherein the interlayer sheets are made of polytetrafluoroethylene. The connecting device according to claim 1, wherein each adapter flange includes a main body extending along the axis direction, and an inner end edge extending circumferentially outward from the main body and abutting against the corresponding interlayer sheet part, and an outer end edge portion which extends circumferentially outward from the main body portion and is spaced apart from the inner end edge portion along the axial direction, the connection device also includes a plurality of gusset plates sandwiched between the tie rods and the Gaskets between matching flanges, each spacer is located between a corresponding gusset plate and a corresponding inner end edge. According to the connection device described in claim 5, each gasket is made of SUS316 stainless steel. The connecting device as claimed in claim 1, further comprising a cover fixed on one of the receiving parts and surrounding and covering the bellows.

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