Metal welding corrugated pipe

Abstract

The utility model provides a metal welding corrugated pipe which comprises a corrugated pipe fitting, the corrugated pipe fitting is composed of a corrugated pipe body and connecting ends, the connecting ends are symmetrically connected to the two ends of the corrugated pipe body, the outer side faces of the connecting ends are fixedly connected with a fixing outer ring and a fixing inner ring respectively, and the fixing outer ring and the fixing inner ring are fixedly connected. The end face of the fixing inner ring is fixedly connected with the end face of the corrugated pipe body, the outer side face of the fixing inner ring is fixedly connected with one end of the reinforcing ring, and the other end of the reinforcing ring is fixedly connected with one end of the corrugated pipe body. Through cooperation of the fixing outer ring, the fixing inner ring, the positioning rods and the reinforcing rings, the structural strength of the two ends of the corrugated pipe body can be effectively enhanced, and then the probability that the first corrugated annular structures at the two ends of the corrugated pipe fitting are broken is effectively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of bellows, in particular to a metal welded bellows. Background Art

[0002] The bellows is composed of a series of annular corrugated structures connected together. It is a closed thin shell container with axial elasticity. It has similar performance to industrial springs and can be axially extended and compressed under the action of external force. In the fields of aviation, aerospace, nuclear power, and chemical industry, the role of the metal welded bellows used on valves is mainly to isolate the medium, withstand a certain pressure, and meet a certain displacement. The pressure and displacement both affect the lifespan. The greater the pressure, the shorter the lifespan, and the greater the displacement, the shorter the lifespan. However, in the actual pressure-bearing process of the bellows, the first corrugated ring structure at both ends of the bellows is susceptible to stress concentration under high pressure, and is then the most likely to rupture first, which will make the bellows as a whole unusable and need to be replaced with a new bellows, thereby reducing the stability of the bellows in actual use. Utility Model Content

[0003] In order to overcome the defects of the prior art, a metal welded bellows is provided to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, a metal welded bellows is provided, comprising: a bellows fitting, wherein the bellows fitting is composed of a bellows body and a connecting end, and the connecting end is symmetrically connected to the two ends of the bellows body, and the outer side surfaces of the connecting end are respectively fixedly connected to the fixed outer ring and the fixed inner ring, and the fixed outer ring and the fixed inner ring are fixedly connected, and at the same time, the end face of the fixed inner ring is fixedly connected to the end face of the bellows body, and the outer side face of the fixed inner ring is fixedly connected to one end of the reinforcement ring, and the other end of the reinforcement ring is fixedly connected to one end of the bellows body.

[0005] Preferably, the bellows main body and the connecting ends fixedly connected at both ends are an integrally formed structure, and both sets of connecting ends are in a circular ring structure.

[0006] Preferably, four groups of positioning grooves are formed on the outer arc surface of the connecting end at equal intervals along the circumferential direction, the four groups of positioning grooves are all in the shape of long strips, and the length of the positioning grooves is equal to the axial length of the connecting end.

[0007] Preferably, the fixed outer ring is annular in structure, the inner diameter of the fixed outer ring is equal to the outer diameter of the connecting end, and multiple groups of through holes are opened at equal intervals around the outer side of the fixed outer ring surface along the circumferential direction, and the multiple groups of through holes are cylindrical in structure.

[0008] Preferably, the fixed inner ring has a circular ring structure, the inner diameter of the fixed inner ring is equal to the outer diameter of the connecting end, the outer diameter of the fixed inner ring is smaller than the outer diameter of the fixed outer ring, and a buffer groove is provided on the outer arc surface of the fixed inner ring away from the end of the fixed outer ring, and the buffer groove has a circular ring structure.

[0009] Preferably, the inner side surfaces of the fixed outer ring and the fixed inner ring are fixedly connected to the positioning plates relative to the positioning grooves, the four groups of positioning plates are all semi-cylindrical structures, and the arc surface dimensions of the positioning plates are adapted to the arc surface dimensions of the positioning grooves, and at the same time, multiple groups of positioning holes are opened at equal intervals along the circumferential direction on the outer arc surface of the fixed inner ring.

[0010] Preferably, there are two groups of reinforcement rings, both of which are semicircular ring structures, and the cross-section of the reinforcement ring is triangular structure, and the side of the reinforcement ring close to the end face of the bellows body is a corresponding arc-shaped structure. At the same time, the inner side surface of the reinforcement ring close to one end of the fixed inner ring is connected to the positioning rod corresponding to the position of the positioning hole, and the positioning rod is a cylindrical structure.

[0011] Compared with the prior art, the beneficial effect of the present invention is that through the cooperation of the fixed outer ring, the fixed inner ring, the positioning rod and the reinforcing ring, the structural strength of the first corrugated ring structure at both ends of the bellows body can be effectively strengthened, thereby increasing the upper limit of stress tolerance, thereby reducing the probability of the bellows fitting breaking and ensuring the stability of the bellows fitting during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a front view schematic diagram of an embodiment of the utility model.

[0013] Figure 2 It is a side view schematic diagram of an embodiment of the utility model.

[0014] Figure 3 This is a front view schematic diagram of a reinforcement ring according to an embodiment of the present invention.

[0015] Figure 4 For the embodiment of the utility model Figure 1 A magnified schematic diagram of .

[0016] In the figure: 1. Bellows fitting; 2. Bellows body; 3. Reinforcement ring; 4. Fixed outer ring; 5. Fixed inner ring; 6. Connecting end; 7. Through hole; 8. Positioning plate; 9. Positioning rod; 10. Buffer groove. DETAILED DESCRIPTION

[0017] Reference Figures 1 to 4As shown, the utility model provides a metal welded bellows, comprising: a bellows fitting 1, wherein the bellows fitting 1 is composed of a bellows main body 2 and a connecting end 6, and the connecting end 6 is symmetrically connected to the two ends of the bellows main body 2, and the outer side surfaces of the connecting end 6 are respectively fixedly connected to the fixed outer ring 4 and the fixed inner ring 5, and the fixed outer ring 4 and the fixed inner ring 5 are fixedly connected, and at the same time, the end face of the fixed inner ring 5 is fixedly connected to the end face of the bellows main body 2, and the outer side face of the fixed inner ring 5 is fixedly connected to one end of the reinforcement ring 3, and the other end of the reinforcement ring 3 is fixedly connected to one end of the bellows main body 2.

[0018] The locating plate 8 is first aligned with the locating groove, and then, in the process of the locating plate 8 and the inner ring 5 being connected, the locating plate 8 can also be synchronously embedded in the locating groove, thereby helping to enhance the stability of the connection between the locating plate 4 and the inner ring 5 and the connecting end 6, thereby facilitating the subsequent welding process, and avoiding the problem of accidental rotation of the locating plate 4 and the inner ring 5 relative to the connecting end 6 in the early stage of welding. Afterwards, the connection between the locating plate 4 and the connecting end 6 is welded and fixed, and the connection between the locating plate 5 and the end face of the bellows main body 2 is welded and fixed, and the locating rod 9 provided on the reinforcing ring 3 is embedded in the locating hole opened on the outer side surface of the fixed inner ring 5, so that the reinforcing ring 3 can be quickly positioned on the surface of the fixed inner ring 5 and the bellows main body 2, and then the two ends of the reinforcing ring 3 can be respectively welded and fixed to the fixed inner ring 5 and the end face of the bellows main body 2, thereby effectively enhancing the structural strength of the first corrugated ring structure at both ends of the bellows part 1 and enhancing the stability of the bellows part 1 during use.

[0019] As a preferred embodiment, the bellows body 2 and the connecting ends 6 fixedly connected at both ends are an integrally formed structure, and both sets of connecting ends 6 are in a circular ring structure.

[0020] In this embodiment, if Figure 1 The bellows body 2 and the connecting end 6 are integrally formed, which can then help enhance the structural strength of both ends of the bellows 1 and facilitate subsequent corresponding welding.

[0021] As a preferred embodiment, four groups of positioning grooves are provided at equal intervals around the outer arc surface of the connecting end 6 along the circumferential direction. The four groups of positioning grooves are all in the shape of long strips, and the length of the positioning grooves is equal to the axial length of the connecting end 6.

[0022] In this embodiment, if Figure 2 and Figure 4 The opening of the positioning groove can play an auxiliary positioning effect during the sleeve connection of the fixed outer ring 4 and the fixed inner ring 5, and then facilitate the subsequent welding process.

[0023] As a preferred embodiment, the fixed outer ring 4 has a circular ring structure, the inner diameter of the fixed outer ring 4 is equal to the outer diameter of the connecting end 6, and a plurality of groups of through holes 7 are provided at equal intervals around the outer side of the surface of the fixed outer ring 4 along the circumferential direction, and the plurality of groups of through holes 7 are all cylindrical structures.

[0024] In this embodiment, if Figure 1 and Figure 2 The sizes of the inner side surface of the fixed outer ring 4 and the outer side surface of the connecting end 6 are adapted to each other, which can help enhance the stability of the fixed outer ring 4 after being sleeved. At the same time, the opening of the through hole 7 facilitates the corresponding fixed connection between the bellows 1 and the external components through the fixed outer ring 4.

[0025] As a preferred embodiment, the fixed inner ring 5 has a circular ring structure, the inner diameter of the fixed inner ring 5 is equal to the outer diameter of the connecting end 6, the outer diameter of the fixed inner ring 5 is smaller than the outer diameter of the fixed outer ring 4, and a buffer groove 10 is provided on the end of the outer arc surface of the fixed inner ring 5 away from the fixed outer ring 4, and the buffer groove 10 has a circular ring structure.

[0026] In this embodiment, if Figure 1 and Figure 4 The sizes of the inner side surface of the fixed inner ring 5 and the outer side surface of the connecting end 6 are adapted to each other, which can help enhance the stability of the fixed inner ring 5 after being sleeved, and the opening of the buffer groove 10 allows the welding marks between the fixed inner ring 5 and the bellows body 2 to be hidden in the buffer groove 10, ensuring that the reinforcement ring 3 can stably fit the surfaces of the fixed inner ring 5 and the bellows body 2.

[0027] As a preferred embodiment, the inner side surfaces of the fixed outer ring 4 and the fixed inner ring 5 relative to the positioning groove are fixedly connected to the positioning plates 8. The four groups of positioning plates 8 are all semi-cylindrical structures, and the arc surface size of the positioning plates 8 is adapted to the arc surface size of the positioning groove. At the same time, multiple groups of positioning holes are opened at equal intervals along the circumferential direction on the outer arc surface of the fixed inner ring 5.

[0028] In this embodiment, if Figure 2 and Figure 4 The sizes of the positioning plate 8 and the positioning groove are adapted to each other, which can enhance the stability of the connection between the fixed outer ring 4, the fixed inner ring 5 and the connecting end 6, avoid the problem of accidental rotation, ensure the stability of the initial welding, reduce the difficulty of welding, and at the same time, the opening of the positioning hole can facilitate the improvement of the efficiency of the positioning of the reinforcing ring 3.

[0029] As a preferred embodiment, there are two groups of reinforcement rings 3, both groups of reinforcement rings 3 are semicircular structures, and the cross-section of the reinforcement ring 3 is triangular structure, and the side of the reinforcement ring 3 close to the end face of the bellows body 2 is a corresponding arc-shaped structure. At the same time, the inner side surface of the reinforcement ring 3 close to one end of the fixed inner ring 5 is connected to the positioning rod 9 corresponding to the position of the positioning hole, and the positioning rod 9 is a cylindrical structure.

[0030] In this embodiment, if Figure 2 、 Figure 3 and Figure 4 The two ends of the inner side of the reinforcing ring 3 are respectively fitted with the end face of the bellows body 2 and the outer side of the fixed inner ring 5, which can help enhance the fixing effect of the reinforcing ring 3 and improve the structural strength of the first corrugated ring structure at both ends of the bellows 1. At the same time, the sizes of the positioning rod 9 and the positioning hole are adapted to each other, which can help enhance the stability of the connection between the reinforcing ring 3 and the fixed inner ring 5.

[0031] The metal welded bellows of the present invention can effectively enhance the structural strength of both ends of the bellows main body 2 through the cooperation of the fixed outer ring 4, the fixed inner ring 5, the positioning rod 9 and the reinforcing ring 3, thereby effectively reducing the probability of rupture of the first corrugated ring structure at both ends of the bellows fitting 1, and can also help reduce the difficulty of welding between the various components of the bellows fitting 1.

Claims

1. A metal welded bellows, comprising: A bellows fitting (1), characterized in that: the bellows fitting (1) consists of a bellows body (2) and a connecting end (6), and the connecting end (6) is symmetrically connected to the two ends of the bellows body (2), and the outer side surfaces of the connecting end (6) are fixedly connected to the fixed outer ring (4) and the fixed inner ring (5), respectively, and the fixed outer ring (4) and the fixed inner ring (5) are fixedly connected, and at the same time, the end surface of the fixed inner ring (5) is fixedly connected to the end surface of the bellows body (2), and the outer side surface of the fixed inner ring (5) is fixedly connected to one end of the reinforcement ring (3), and the other end of the reinforcement ring (3) is fixedly connected to one end of the bellows body (2).

2. A metal welded bellows according to claim 1, characterized in that: The bellows main body (2) and the connecting ends (6) fixedly connected at both ends are an integrally formed structure, and both sets of connecting ends (6) are in a circular ring structure.

3. The metal welded bellows according to claim 1, characterized in that: The outer arc surface of the connecting end (6) is provided with four groups of positioning grooves at equal intervals along the circumferential direction. The four groups of positioning grooves are all in the form of long strips, and the length of the positioning grooves is equal to the axial length of the connecting end (6).

4. The metal welded bellows according to claim 1, characterized in that: The fixed outer ring (4) is in a circular ring structure, the inner diameter of the fixed outer ring (4) is equal to the outer diameter of the connecting end (6), and a plurality of groups of through holes (7) are provided at equal intervals along the circumferential direction on the outer side of the surface of the fixed outer ring (4), and the plurality of groups of through holes (7) are all in a cylindrical structure.

5. The metal welded bellows according to claim 1, characterized in that: The fixed inner ring (5) is in a circular ring structure, the inner diameter of the fixed inner ring (5) is equal to the outer diameter of the connecting end (6), while the outer diameter of the fixed inner ring (5) is smaller than the outer diameter of the fixed outer ring (4), and a buffer groove (10) is provided at one end of the outer arc surface of the fixed inner ring (5) away from the fixed outer ring (4), and the buffer groove (10) is in a circular ring structure.

6. The metal welded bellows according to claim 1, characterized in that: The inner side surfaces of the fixed outer ring (4) and the fixed inner ring (5) are fixedly connected to the positioning plates (8) at positions relative to the positioning grooves. The four groups of positioning plates (8) are all semi-cylindrical in structure, and the arc surface size of the positioning plates (8) is adapted to the arc surface size of the positioning grooves. At the same time, the outer arc surface of the fixed inner ring (5) is provided with a plurality of groups of positioning holes at equal intervals along the circumferential direction.

7. The metal welded bellows according to claim 1, characterized in that: There are two groups of reinforcing rings (3), both of which are semicircular ring structures, and the cross-section of the reinforcing rings (3) is triangular, and the side of the reinforcing ring (3) close to the end face of the bellows body (2) is a corresponding arc-shaped structure, and the inner side surface of the reinforcing ring (3) close to one end of the fixed inner ring (5) is connected to the positioning rod (9) corresponding to the position of the positioning hole, and the positioning rod (9) is a cylindrical structure.

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