A metal bellows expansion joint with external protection

Abstract

The utility model relates to the technical field of metal bellows expansion joints, and discloses a metal bellows expansion joint with external protection, which solves the problem that the current bellows is exposed to the outside and is easily damaged by the outside. The utility model comprises a bellows, wherein two ends of the bellows are respectively fixedly installed with a connecting pipe 1 and a connecting pipe 2, and flanges are fixedly installed on the outer sides of the connecting pipe 1 and the connecting pipe 2, and two limit rods are symmetrically arranged between the two flanges, and a protective mechanism is installed on the outer side of the bellows; the utility model, through the cooperation between the positioning rod and the fixing ring 1 and the screw and the nut, facilitates the two protective semi-cylinders 2 to fit each other and be sleeved on the outer side of the bellows, and through the cooperation between the protective semi-cylinder 1 and the fixing ring 2 and the positioning block, facilitates the two protective semi-cylinders 1 to fit each other and be sleeved on the outer side of the bellows, and then the bellows can be wrapped, thereby protecting the outer side of the bellows.

Description

Technical Field

[0001] The utility model belongs to the technical field of metal bellows expansion joints, in particular to a metal bellows expansion joint with external protection. Background Art

[0002] Metal bellows expansion joints are important connecting components in engineering technology. They are composed of corrugated flexible pipes, mesh sleeves and joints. They are used as compensation elements, sealing elements, connecting elements and shock-absorbing elements in various gas and liquid pipeline systems as well as length, temperature, position and angle compensation systems. They are used in aerospace, petrochemical, mining electronics, machinery and shipbuilding, medical and health, light textile electronics, energy and construction and other fields.

[0003] The bellows of the existing metal bellows expansion joint is exposed to the outside when in use, which can easily cause the bellows to be damaged by the outside. Utility Model Content

[0004] In view of the above situation, in order to overcome the defects of the prior art, the utility model provides a metal bellows expansion joint with external protection, which effectively solves the problem that the current bellows is exposed to the outside and easily damaged by the outside.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a metal corrugated expansion joint with external protection, comprising a bellows, a connecting pipe 1 and a connecting pipe 2 are respectively fixedly installed at both ends of the bellows, flanges are fixedly installed on the outer sides of the connecting pipe 1 and the connecting pipe 2, two limit rods are symmetrically arranged between the two flanges, and a protective mechanism is installed on the outer side of the bellows;

[0006] The protection mechanism includes a fixing ring 1 fixed to the outside of a connecting pipe 2, two protecting semi-cylinders 2 are symmetrically arranged on the outside of the fixing ring 1, the two protecting semi-cylinders 2 are fitted together and sleeved on the outside of the bellows, the two protecting semi-cylinders 2 are movably sleeved with a protecting semi-cylinder 1, the two protecting semi-cylinders 1 are fitted together and sleeved on the outside of the bellows, a fixing ring 2 is fixedly installed on the outside of the connecting pipe 1, and the two protecting semi-cylinders 1 are sleeved on the outside of the fixing ring 2.

[0007] Preferably, two positioning blocks are symmetrically fixedly connected to the outer side of the fixing ring 2, and two protective semi-cylinders 1 are respectively sleeved on the outer sides of the two positioning blocks.

[0008] Preferably, the side of the second protective semi-cylinder away from the second fixing ring is symmetrically fixedly connected with two positioning rods, and the two positioning rods both pass through the first fixing ring.

[0009] Preferably, an inner block 1 is fixedly installed on the inner side of the protective semi-cylinder 2, and the inner block 1 does not contact the bellows. A screw is fixedly installed on the side of the inner block 1 away from the fixing ring 2, and the screw passes through the fixing ring 1. A nut is threadedly sleeved on the outer side of the screw, and the nut is located on the side of the fixing ring 1 away from the protective semi-cylinder 2.

[0010] Preferably, an inner block 2 is fixedly installed on the inner side of the protective semi-cylinder 1, and the inner block 2 does not contact the bellows. A U-shaped round rod is fixedly installed on the side of the inner block 1 close to the inner block 2, and the inner block 2 penetrates the U-shaped round rod and is movably connected to the U-shaped round rod.

[0011] Preferably, two springs are symmetrically fixedly connected between the inner block 2 and the inner block 1, and the two springs are both sleeved on the outer side of the U-shaped round rod.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] (1) The utility model facilitates the two protective semi-cylinders 2 to fit together and be sleeved on the outside of the bellows through the cooperation between the positioning rod and the fixing ring 1 and the screw rod and the nut, and facilitates the two protective semi-cylinders 1 to fit together and be sleeved on the outside of the bellows through the cooperation between the protective semi-cylinder 1 and the fixing ring 2 and the positioning block, thereby wrapping the bellows and protecting the outside of the bellows;

[0014] (2) The new type facilitates the connection and limiting of the protective semi-cylinder 1 and the protective semi-cylinder 2 through the cooperation between the inner block 1 and the inner block 2 and the U-shaped round rod and the spring, thereby preventing the protective semi-cylinder 1 and the protective semi-cylinder 2 from being separated. Since the spring is elastic, the protective semi-cylinder 1 and the protective semi-cylinder 2 can move relative to each other, thereby facilitating the normal use of the bellows. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation to the present invention.

[0016] In the attached picture:

[0017] Figure 1 This is a schematic diagram of the structure of the metal bellows expansion joint with external protection of the utility model;

[0018] Figure 2 This is a schematic diagram of the structure of the bellows of the utility model;

[0019] Figure 3 This is a schematic diagram of the structure of the protection mechanism of the utility model;

[0020] Figure 4 This is a schematic diagram of the disassembled structure of the fixing ring 1 and the protective semi-cylinder 2 of the utility model;

[0021] Figure 5 This is a schematic diagram of the structure of the inner block of the utility model;

[0022] In the figure: 1. bellows; 2. protective mechanism; 201. fixing ring 1; 202. nut; 203. protective semi-cylinder 1; 204. protective semi-cylinder 2; 205. fixing ring 2; 206. positioning block; 207. inner block 1; 208. positioning rod; 209. inner block 2; 2010. U-shaped round rod; 2011. spring; 2012. screw; 3. connecting pipe 1; 4. connecting pipe 2; 5. flange; 6. limit rod. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments; based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0024] Embodiment 1, by Figure 1-2 It is given that the utility model includes a bellows 1, at both ends of the bellows 1 are respectively fixedly installed with a connecting pipe 1 3 and a connecting pipe 2 4, the outer sides of the connecting pipe 1 3 and the connecting pipe 2 4 are fixedly installed with flanges 5, two limit rods 6 are symmetrically provided between the two flanges 5, and a protective mechanism 2 is installed on the outer side of the bellows 1.

[0025] Specifically, by Figure 3-5It is given that the protection mechanism 2 includes a fixing ring 201 fixed to the outside of the connecting pipe 24, and two protective semi-cylinders 204 are symmetrically arranged on the outside of the fixing ring 201. The two protective semi-cylinders 204 are fitted together and sleeved on the outside of the bellows 1. The two protective semi-cylinders 204 are movably sleeved with protective semi-cylinders 203. The two protective semi-cylinders 203 are fitted together and sleeved on the outside of the bellows 1. A fixing ring 205 is fixedly installed on the outside of the connecting pipe 3. The two protective semi-cylinders 203 are sleeved on the outside of the fixing ring 205. The outside of the fixing ring 205 is symmetrically fixedly connected with two positioning blocks 206. The two protective semi-cylinders 204 are movably sleeved with protective semi-cylinders 203. The cylinder 1 203 is respectively sleeved on the outside of the two positioning blocks 206, and the side of the protective semi-cylinder 204 away from the fixed ring 205 is symmetrically fixedly connected with two positioning rods 208, and the two positioning rods 208 both penetrate the fixed ring 1 201, and the inner side of the protective semi-cylinder 204 is fixedly installed with an inner block 1 207, and the inner block 1 207 does not contact the bellows 1, and the side of the inner block 1 207 away from the fixed ring 205 is fixedly installed with a screw 2012, and the screw 2012 penetrates the fixed ring 1 201, and the outer side of the screw 212 is threadedly sleeved with a nut 202, and the nut 202 is located on the side of the fixed ring 1 201 away from the protective semi-cylinder 204;

[0026] In the use state, first, the two protective semi-cylinders 203 are respectively put on the outside of the two positioning blocks 206 until the two protective semi-cylinders 203 are both fitted with the fixing ring 205. At this time, the two protective semi-cylinders 203 are fitted together and put on the outside of the bellows 1, and at the same time, the two protective semi-cylinders 204 are fitted together and put on the outside of the bellows 1. Then, the two protective semi-cylinders 204 are moved until they are fitted with the fixing ring 201. At this time, the two screws 2012 and each positioning rod 208 all pass through the fixing ring 201, and then the two nuts 202 are respectively put on the two screws 2012 and tightened, and the two protective semi-cylinders 204 are fixed to the fixing ring 201. Finally, the bellows 1 is wrapped by the two protective semi-cylinders 1 203 and the two protective semi-cylinders 204 to prevent the bellows 1 from being damaged by the outside.

[0027] Specifically, by Figure 5 It is given that an inner block 209 is fixedly installed on the inner side of the protective semi-cylinder 1 203, and the inner block 209 does not contact the bellows 1. A U-shaped round rod 2010 is fixedly installed on the side of the inner block 1 207 close to the inner block 209. The U-shaped round rod 2010 is parallel to the protective semi-cylinder 1 203 and does not contact the protective semi-cylinder 1 203. The inner block 209 penetrates the U-shaped round rod 2010 and is movably connected to the U-shaped round rod 2010. Two springs 2011 are symmetrically fixedly connected between the inner block 209 and the inner block 1 207, and the two springs 2011 are both sleeved on the outer side of the U-shaped round rod 2010.

[0028] In the initial state, first, the inner block 209 is fixed on the inner side of the protective semi-cylinder 203, and the inner block 207 is fixed on the inner side of the protective semi-cylinder 204, and then the U-shaped round rod 2010 is fixed on the inner block 207, so that the inner block 209 is sleeved on the outer side of the U-shaped round rod 2010, and the protective semi-cylinder 1 203 is connected with the protective semi-cylinder 204 to prevent the protective semi-cylinder 1 203 from being separated from the protective semi-cylinder 204, and then two springs 2011 are connected between the inner block 209 and the inner block 1 207, and the two springs 2011 are both sleeved on the outer side of the U-shaped round rod 2010. Since the spring 2011 is elastic, the normal use of the bellows 1 is finally guaranteed.

Claims

1. A metal bellows expansion joint with external protection, comprising a bellows (1), characterized in that: The two ends of the bellows (1) are respectively fixedly mounted with a connecting pipe 1 (3) and a connecting pipe 2 (4); flanges (5) are fixedly mounted on the outer sides of the connecting pipe 1 (3) and the connecting pipe 2 (4); two limit rods (6) are symmetrically arranged between the two flanges (5); and a protective mechanism (2) is mounted on the outer side of the bellows (1); The protection mechanism (2) comprises a fixing ring 1 (201) fixed to the outside of the connecting pipe 2 (4); two protecting semi-cylinders 2 (204) are symmetrically arranged on the outside of the fixing ring 1 (201); the two protecting semi-cylinders 2 (204) are mutually fitted and sleeved on the outside of the bellows (1); the two protecting semi-cylinders 2 (204) are both movably sleeved with protecting semi-cylinders 1 (203); the two protecting semi-cylinders 1 (203) are mutually fitted and sleeved on the outside of the bellows (1); a fixing ring 2 (205) is fixedly installed on the outside of the connecting pipe 1 (3); the two protecting semi-cylinders 1 (203) are both sleeved on the outside of the fixing ring 2 (205).

2. A metal bellows expansion joint with external protection according to claim 1, characterized in that: Two positioning blocks (206) are symmetrically fixedly connected to the outer side of the second fixing ring (205), and the two first protective semi-cylinders (203) are respectively sleeved on the outer sides of the two positioning blocks (206).

3. A metal bellows expansion joint with external protection according to claim 1, characterized in that: Two positioning rods (208) are symmetrically fixedly connected to one side of the second protective semi-cylinder (204) away from the second fixing ring (205), and the two positioning rods (208) both pass through the first fixing ring (201).

4. The metal bellows expansion joint with external protection according to claim 1, characterized in that: An inner block (207) is fixedly mounted on the inner side of the second protective semi-cylinder (204), the inner block (207) not being in contact with the bellows (1), a screw (212) is fixedly mounted on the side of the first inner block (207) away from the second fixing ring (205), the screw (212) passes through the first fixing ring (201), a nut (202) is threadedly sleeved on the outer side of the screw (212), and the nut (202) is located on the side of the first fixing ring (201) away from the second protective semi-cylinder (204).

5. The metal bellows expansion joint with external protection according to claim 1, characterized in that: An inner block 2 (209) is fixedly mounted on the inner side of the protective semi-cylinder 1 (203), the inner block 2 (209) not being in contact with the bellows (1), a U-shaped round rod (2010) is fixedly mounted on the side of the inner block 1 (207) close to the inner block 2 (209), the inner block 2 (209) penetrates the U-shaped round rod (2010) and is movably connected to the U-shaped round rod (2010).

6. A metal bellows expansion joint with external protection according to claim 5, characterized in that: Two springs (2011) are symmetrically fixedly connected between the inner block 2 (209) and the inner block 1 (207), and the two springs (2011) are both sleeved on the outside of the U-shaped round rod (2010).

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