Combined metal corrugated pipe

Abstract

The utility model relates to the technical field of metal corrugated pipes, in particular to a combined metal corrugated pipe which comprises a flange, a corrugated pipe fixedly connected to the inner side of the flange, a guide cylinder arranged on the inner side of the corrugated pipe, a second screw in threaded connection with the top end of one side of the flange, a nut in threaded connection with the surface of the second screw, and a first screw in threaded connection with the top end of the other side of the flange. An inner threaded pipe is screwed to the joint of the second screw and the first screw, a sliding groove is formed in the surface of one side of the second screw, and a sliding rod is arranged on the inner side of the sliding groove; the corrugated pipe can be installed after being adjusted by a certain length in a telescopic mode, when the corrugated pipe stretches out and draws back or axially deviates, the sliding rods can slide on the inner sides of the sliding grooves, the sliding rods and the spherical joints can be bent by a certain angle along with the corrugated pipe, and the heat absorption deformation amount of the corrugated pipe is greatly increased; the internal threaded pipe is prevented from automatically rotating and loosening due to vibration during transportation and losing limitation on the compressed or stretched corrugated pipe, and the internal threaded pipe is simple to mount and easy to operate.

Description

Technical Field

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

[0002] A metal bellows is a pipe with a regular wavy shape. Common metal bellows are made of carbon steel, stainless steel, steel lined with plastic, aluminum, etc. It is mainly used for non-concentric axial transmission with a very small bending radius, or irregular turning, expansion and contraction, or absorbing the thermal deformation of the pipeline, or connecting pipelines to pipelines or pipelines to equipment in occasions where it is not convenient to install fixed elbows. However, there are still some problems with existing metal bellows;

[0003] Existing metal bellows only have a wavy treatment and lack an adjustment function. When installing metal bellows at low temperatures, the metal bellows itself is also in a contracted state. When it reaches high temperatures, the pipelines at both ends of the metal bellows absorb heat and expand. At this time, the metal bellows is squeezed and deformed by the pipelines at both ends. Since the metal bellows is installed in a contracted state and expands itself after absorbing heat, the amount of squeezing deformation that can be received at this time is limited. For this reason, we propose a combined metal bellows. Content of the Utility Model

[0004] In order to overcome the deficiencies of the prior art, the utility model provides a combined metal bellows. By setting the bellows to be able to expand and contract and adjust a certain length before installation, when the bellows expands and contracts or axially offsets, the sliding rod can slide inside the chute, and the sliding rod and the spherical joint can bend at a certain angle along with the bellows, greatly increasing the heat absorption deformation amount of the bellows. And a clamping block is set to prevent the internal threaded pipe from automatically rotating and loosening when receiving vibration during transportation, losing the restriction on the already compressed or stretched bellows, and the installation is simple and easy to operate.

[0005] To solve the above technical problems, the utility model provides the following technical solution: A combined metal bellows, including a flange, a bellows is fixedly connected inside the flange, a flow guide cylinder is arranged inside the bellows, a second screw rod is screwed on the top end of one side of the flange, a nut is screwed on the surface of the second screw rod, a first screw rod is screwed on the top end of the other side of the flange, an internal threaded pipe is screwed at the connection of the second screw rod and the first screw rod, a chute is opened on the surface of one side of the second screw rod, a sliding rod is arranged inside the chute, one end of the sliding rod penetrates through the chute and is inside the internal threaded pipe, and a spherical joint is fixedly connected to one end of the sliding rod. One end of the first screw rod is inside the internal threaded pipe, and one end of the spherical joint is fixedly connected to one end of the first screw rod.

[0006] Preferably, a bearing seat is fixedly connected to the middle of the internally threaded pipe. A bearing is arranged inside the bearing seat. A rubber membrane is fixedly connected to the bottom end of the bearing. Both ends of the rubber membrane are fixedly connected to the flange.

[0007] Preferably, a pressing groove is formed on the surface of the top end of the internally threaded pipe. A clamping groove is formed on the surface of the top end of the first screw rod. A spring is arranged inside the clamping groove. A clamping block is arranged at the top end of the spring. The top end of the clamping block penetrates through the clamping groove and is located inside the pressing groove. A pressing block is arranged at the top end of the clamping block. The top end of the pressing block penetrates through the pressing groove and is located outside the internally threaded pipe.

[0008] Preferably, four second screw rods are provided, and sixteen nuts are provided.

[0009] Preferably, a pressing plate is arranged at the top end of the pressing block, and a diagonal pattern is formed on the surface of the pressing plate.

[0010] Preferably, one end of the flow guide cylinder is fixedly connected to the inner wall of the corrugated pipe, and one end of the flow guide cylinder is movably connected to the inner wall of the corrugated pipe.

[0011] Compared with the prior art, the beneficial effects that the present utility model can achieve are as follows:

[0012] 1. By providing a corrugated pipe, it can be telescopically adjusted to a certain length before installation. When the corrugated pipe expands and contracts or axially offsets, the sliding rod can slide inside the sliding groove. The sliding rod and the spherical joint can bend at a certain angle along with the corrugated pipe, greatly increasing the heat absorption deformation amount of the corrugated pipe. And a clamping block is provided to prevent the internally threaded pipe from automatically rotating and loosening due to vibration during transportation, losing the restriction on the already compressed or stretched corrugated pipe. The installation is simple and easy to operate.

[0013] 2. By providing a rubber membrane to cover the corrugated pipe, the rubber membrane can prevent particulate impurities from entering the grooves on the outer surface of the corrugated pipe, effectively protecting the corrugated pipe to work normally. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic structural diagram of an embodiment of the present utility model;

[0015] Figure 2 is Figure 1 an enlarged structural diagram at A in

[0016] Figure 3 is Figure 1 an enlarged structural diagram at B in

[0017] Wherein: 1. Flange; 2. Second screw; 3. First screw; 4. Spherical joint; 5. Internally threaded tube; 6. Chute; 7. Slide bar; 8. Bearing seat; 9. Rubber membrane; 10. Bellows; 11. Nut; 12. Flow guide cylinder; 13. Block; 14. Spring; 15. Pressing block; 16. Pressing groove; 17. Card slot; 18. Bearing. Detailed implementation mode

[0018] In order to make the technical means, creative features, achieved purposes and effects realized by the present utility model easy to understand, the present utility model will be further described below in conjunction with specific embodiments. However, the following embodiments are only the preferred embodiments of the present utility model and not all of them. Based on the embodiments in the implementation mode, other embodiments obtained by those skilled in the art without creative work all belong to the protection scope of the present utility model. The experimental methods in the following embodiments are all conventional methods unless otherwise specified, and the materials, reagents, etc. used in the following embodiments can all be obtained from commercial channels unless otherwise specified.

[0019] Embodiment:

[0020] As Figure 1 shown in Figure 2 the figure, a combined metal bellows includes a flange 1. A bellows 10 is fixedly connected to the inner side of the flange 1. A flow guide cylinder 12 is arranged inside the bellows 10. A second screw 2 is screwed to the top end of one side of the flange 1. A nut 11 is screwed on the surface of the second screw 2. A first screw 3 is screwed to the top end of the other side of the flange 1. An internally threaded tube 5 is screwed at the connection of the second screw 2 and the first screw 3. A chute 6 is formed on the surface of one side of the second screw 2. A slide bar 7 is arranged inside the chute 6. One end of the slide bar 7 penetrates through the chute 6 and is inside the internally threaded tube 5, and one end of the slide bar 7 is fixedly connected with a spherical joint 4. One end of the first screw 3 is inside the internally threaded tube 5. One end of the spherical joint 4 is fixedly connected with one end of the first screw 3. A pressing groove 16 is formed on the top surface of the internally threaded tube 5. A card slot 17 is formed on the top surface of the first screw 3. A spring 14 is arranged inside the card slot 17. A block 13 is arranged at the top end of the spring 14. The top end of the block 13 penetrates through the card slot 17 and is inside the pressing groove 16. A pressing block 15 is arranged at the top end of the block 13. The top end of the pressing block 15 penetrates through the pressing groove 16 and is outside the internally threaded tube 5.

[0021] The existing metal bellows only have a wavy treatment and lack an adjustment function. When installing the metal bellows at low temperatures, the metal bellows itself is also in a contracted state. When it reaches high temperatures, the pipes at both ends of the metal bellows absorb heat and expand. At this time, the metal bellows is squeezed and deformed by the pipes at both ends. Since the metal bellows is installed in a contracted state and is expanding itself at this time, the amount of squeezing deformation it can receive is limited. By setting the second screw 2, the first screw 3 and the internal thread pipe 5, before connecting the pipes, stretch or squeeze the flange 1 according to the temperature at the installation site. After the bellows is deformed, tighten the nut 11, and then rotate the internal thread pipe 5. The internal thread pipe 5 rotates forward on the surface of the second screw 2 until the internal thread pipe 5 wraps around the first screw 3 and the block 13 aligns with the pressing groove 16. The spring 14 in the contracted state pushes the block 13 into the pressing groove 16 to prevent the internal thread pipe 5 from rotating automatically due to vibration, completing the fixation. Then, after being transported to the installation site, after connecting the flange 1 and the pipe, at this time, loosen the second screw 2 and the first screw 3, as Figure 2 shown, press the pressing block 15. The pressing block 15 pushes the block 13 to slide from the pressing groove 16 into the inner side of the clamping groove 17. At this time, the spring 14 is stressed and contracts. Then rotate the internal thread pipe 5. Under the interaction of the threads, the internal thread pipe 5 moves towards the side of the second screw 2. The internal thread pipe 5 leaves the surface of the first screw 3 and completely sleeves on the surface of the second screw 2, exposing the spherical joint 4 and the sliding rod 7 outside, completing the operation; By setting the bellows 10, it can be telescoped and adjusted to a certain length before installation. When the bellows 10 expands and contracts or axially offsets, the sliding rod 7 can slide inside the sliding groove 6. The sliding rod 7 and the spherical joint 4 can bend at a certain angle along with the bellows 10, greatly increasing the amount of heat absorption and deformation of the bellows 10. And by setting the block 13, it can prevent the internal thread pipe 5 from rotating and loosening automatically due to vibration during transportation, losing the restriction on the already compressed or stretched bellows 10. The installation is simple and easy to operate.

[0022] In other embodiments, this embodiment discloses, please as Figure 1 and Figure 3 shown, a bearing seat 8 is fixedly connected to the middle of the internal thread pipe 5. A bearing 18 is arranged inside the bearing seat 8. A rubber film 9 is fixedly connected to the bottom end of the bearing 18. Both ends of the rubber film 9 are fixedly connected to the flange 1;

[0023] When the internal thread pipe 5 rotates to the middle of the second screw 2, it drives the bearing seat 8 to rotate. The balls inside the bearing 18 rotate in friction with the bearing seat 8, so that the rubber film 9 does not rotate along. The middle part of the rubber film 9 moves towards the middle of the second screw 2, causing both sides of the rubber film 9 to open evenly and cover the surface of the bellows 10; By setting the rubber film 9 to cover the bellows 10, the rubber film 9 can prevent particulate debris from entering the grooves on the outer surface of the bellows 10, effectively protecting the normal operation of the bellows 10.

[0024] In other embodiments, this embodiment discloses that, as shown in Figure 1 As shown, there are a total of four second screws 2 and a total of sixteen nuts 11; by providing a total of four second screws 2 and a total of sixteen nuts 11, the corrugated pipe 10 is strengthened.

[0025] In other embodiments, this embodiment discloses that, as shown in Figure 2 As shown, a pressing plate is provided at the top of the pressing block 15, and the surface of the pressing plate is provided with diagonal lines; by providing a pressing plate at the top of the pressing block 15 and diagonal lines on the surface of the pressing plate, it is convenient to install the pressing block 15.

[0026] In other embodiments, this embodiment discloses that, as shown in Figure 1 As shown, one end of the flow guide tube 12 is fixedly connected to the inner wall of the corrugated pipe 10, and one end of the flow guide tube 12 is movably connected to the inner wall of the corrugated pipe 10; by providing one end of the flow guide tube 12 fixedly connected to the inner wall of the corrugated pipe 10 and one end of the flow guide tube 12 movably connected to the inner wall of the corrugated pipe 10, the flow guide tube 12 can move telescopically with the corrugated pipe 10.

[0027] The above has described in detail the embodiments of the present invention with reference to the accompanying drawings. However, the present invention is not limited thereto. Within the scope of knowledge possessed by those skilled in the art to which the present invention pertains, various changes can be made without departing from the gist of the present invention.

Claims

1. A combined metal bellows, comprising a flange (1), characterized in that: A bellows (10) is fixedly connected to the inner side of the flange (1), a guide tube (12) is arranged on the inner side of the bellows (10), a second screw (2) is screwed to the top of one side of the flange (1), a nut (11) is screwed to the surface of the second screw (2), a first screw (3) is screwed to the top of the other side of the flange (1), an internally threaded tube (5) is screwed to the connection between the second screw (2) and the first screw (3), a sliding groove (6) is provided on the surface of one side of the second screw (2), a sliding rod (7) is arranged on the inner side of the sliding groove (6), one end of the sliding rod (7) passes through the sliding groove (6) and is located inside the internally threaded tube (5), and one end of the sliding rod (7) is fixedly connected to a spherical joint (4), one end of the first screw (3) is located inside the internally threaded tube (5), and one end of the spherical joint (4) is fixedly connected to one end of the first screw (3).

2. A combined metal bellows according to claim 1, characterized in that: A bearing seat (8) is fixedly connected to the middle of the internally threaded tube (5), a bearing (18) is arranged inside the bearing seat (8), a rubber membrane (9) is fixedly connected to the bottom end of the bearing (18), and both ends of the rubber membrane (9) are fixedly connected to the flange (1).

3. The combined metal bellows according to claim 2, characterized in that: A pressing groove (16) is provided on the top surface of the internally threaded tube (5), a clamping groove (17) is provided on the top surface of the first screw rod (3), a spring (14) is arranged inside the clamping groove (17), a clamping block (13) is arranged on the top of the spring (14), the top of the clamping block (13) passes through the clamping groove (17) and is located inside the pressing groove (16), a pressing block (15) is arranged on the top of the clamping block (13), the top of the pressing block (15) passes through the pressing groove (16) and is located outside the internally threaded tube (5).

4. The combined metal bellows according to claim 1, characterized in that: There are four second screw rods (2) in total, and sixteen nuts (11) in total.

5. The combined metal bellows according to claim 3, characterized in that: A pressing plate is arranged at the top of the pressing block (15), and a surface of the pressing plate is provided with diagonal lines.

6. The combined metal bellows according to claim 1, characterized in that: One end of the guide tube (12) is fixedly connected to the inner wall of the bellows (10), and one end of the guide tube (12) is movably connected to the inner wall of the bellows (10).

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