Rectangular corrugated pipe with four arc angles formed at one time

Abstract

The utility model discloses a one-step formed rectangular corrugated pipe with four arc angles, which comprises a rectangular pipe section with a hollow rectangular structure, a corrugated pipe section is arranged in the middle of the rectangular pipe section, and a first mounting plate and a second mounting plate which are used for being butted with a main pipeline are fixedly mounted on the upper side and the lower side of the rectangular pipe section respectively. And butt joint threaded holes penetrating up and down are formed in the first mounting plate and the second mounting plate at equal intervals, a supporting mechanism used for improving the overall anti-bending effect of the device is arranged between the first mounting plate and the second mounting plate, and the supporting mechanism comprises four longitudinally-arranged supporting rods which are in bilateral symmetry. According to the once-formed rectangular corrugated pipe with the four arc angles, the novel structural design is adopted, the supporting mechanism is arranged between the first mounting plate and the second mounting plate, the first mounting plate and the second mounting plate are supported through supporting rods in the supporting mechanism, and therefore the anti-bending capacity is provided for the whole corrugated pipe; and the situation that the device droops and is bent during transverse installation is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of rectangular corrugated pipes, in particular to a rectangular corrugated pipe with four arc corners formed in one step. Background Technique

[0002] The rectangular corrugated pipe can be deformed well and telescoped freely, and is widely used in compensators (corrugated compensators). The corrugated compensator is an important part of the expansion joint and is widely used in the flexible connections of the inlet and outlet of fans in large thermal power plants, iron and steel smelting, petrochemical industry, nuclear energy and other fields.

[0003] In the prior art, a Chinese patent with the authorization announcement number CN210165024U discloses a rectangular corrugated pipe that can convey two paths of gas, including a rectangular corrugated pipe body. First installation flanges and second installation flanges are respectively welded to the two end faces of the rectangular corrugated pipe body. Two first inlets and outlets and two second inlets and outlets are respectively opened on the first installation flange and the second installation flange. The diameter of the first inlet and outlet is smaller than that of the second inlet and outlet. A first diversion pipe is welded to each first inlet and outlet, and a second diversion pipe is welded to each second inlet and outlet. Each first diversion pipe extends into the corresponding second diversion pipe and extends into the corresponding second inlet and outlet. First bolt installation holes and second bolt installation holes are also respectively opened on the first installation flange and the second installation flange. Two inner and outer layer diversion pipe structures are arranged inside the rectangular corrugated pipe body, and two paths of gas can pass through at the same time. The inner and outer layer diversion pipes can effectively attenuate the inlet air temperature, reduce the surface temperature of the rectangular corrugated pipe, and extend the service life.

[0004] The above device uses the deformation of the rectangular corrugated pipe to achieve the purpose of compensation. However, in the actual use process, there is no support and strengthening measure on the overall side of the device. Therefore, when the device is installed horizontally, the middle position of the device will sag and bend under its own gravity, thus affecting its normal use. Content of the Utility Model

[0005] The purpose of the utility model is to provide a rectangular corrugated pipe with four arc corners formed in one step to solve the problem of poor support effect proposed in the above background technique.

[0006] To achieve the above purpose, the utility model provides the following technical solution: A rectangular corrugated pipe with four arc corners formed in one step, including a rectangular pipe section in a hollow rectangular structure, and a corrugated pipe section is arranged in the middle of the rectangular pipe section. The rectangular corrugated pipe with four arc corners formed in one step further includes:

[0007] First installation plates and second installation plates for docking with the main pipeline are respectively and fixedly installed on the upper and lower sides of the rectangular pipe section, and docking threaded holes penetrating up and down are equidistantly opened inside the first installation plates and the second installation plates;

[0008] A support mechanism for increasing the overall anti-bending effect of the device is arranged between the first mounting plate and the second mounting plate, and the support mechanism includes four longitudinally arranged support rods that are symmetric left and right.

[0009] Preferably, connecting sleeves are installed at the upper and lower ends of the support rods, and a through-type telescopic structure is formed between the connecting sleeves and the support rods.

[0010] Preferably, a telescopic spring for extruding the support rod is fixedly installed inside the connecting sleeve, and a positioning piece is fixedly installed outside the connecting sleeve.

[0011] Preferably, an insertion-type detachable installation structure is formed between the positioning piece and the positioning grooves opened on the surfaces of the first mounting plate and the second mounting plate, and a fixing bolt for fixing the positioning piece is installed outside the positioning grooves.

[0012] Preferably, rubber sealing gaskets are fixedly installed on the outer surfaces of the first mounting plate and the second mounting plate.

[0013] Preferably, the following manufacturing method is included:

[0014] S1. According to the requirements of the wave number, wave depth, wave distance, wave thickness and inner diameter size of the designed rectangular corrugated pipe, cut the rectangular sheet metal well, and use a straight seam welding machine to butt-join the sheet metal into a cylindrical pipe blank.

[0015] S2. First, put the cylindrical pipe blank on the material supporting column arranged on the expanding piece, and expand it into a rectangular pipe blank according to the perimeter of the material.

[0016] S3. Then, put the rectangular pipe blank on the periphery of the mold and place it on the tray that can move up and down arranged below the mold, and adjust the expanding wave distance each time according to the wave number, wave depth and wave distance.

[0017] S4. The mold is mainly composed of an expanding piece, an outer mold and a hammer head moving up and down to form a rectangle, and has the function of mechanically expanding a rectangular corrugated pipe.

[0018] Preferably, the mechanical expanding mold used in S4 is composed of a mold bottom plate, a support plate, a base, an expanding piece, a hammer head and an outer mold to form a rectangular mold. The expanding piece is further divided into several arc expanding pieces and straight expanding pieces, and dovetail keys with linear guidance and trapezoidal keys inclined at 15° are arranged on the expanding piece.

[0019] Compared with the prior art, the beneficial effects of the present utility model are as follows: The one-time formed rectangular corrugated pipe with four arc corners adopts a novel structural design, and the specific content is as follows:

[0020] 1. A support mechanism is arranged between the first mounting plate and the second mounting plate, and the support rods in the support mechanism are used to support the first mounting plate and the second mounting plate, so as to provide the overall anti-bending ability for the device and avoid the situation of sagging and bending when the device is horizontally installed.

[0021] Furthermore, connection sleeves are installed at the upper and lower ends of the support rod. The support rod is slidably connected through the connection sleeve. The telescopic spring inside the connection sleeve is used to squeeze the support rod for telescoping, so as to cooperate with the telescopic compensation of the whole device.

[0022] 2. When manufacturing, cut the rectangular sheet metal according to the pre-designed wave number, wave depth, wave pitch, wave thickness and inner diameter size of the rectangular bellows. Use a straight seam welding machine to butt the sheet metal into an angle shape, and then put it on the rectangular mold to form a rectangular bellows with four arc corners at one time. Moreover, a rectangular bellows with up to ten layers of waves can be expanded. This method avoids multiple welds, eliminates welding difficulty and welding stress, can improve production efficiency, reduce costs, and improve the quality and service life of the finished product. Description of the Drawings

[0023] Figure 1 It is a schematic diagram of the overall structure of the present utility model;

[0024] Figure 2 It is a schematic diagram of the installation state structure of the positioning piece of the present utility model;

[0025] Figure 3 It is a schematic diagram of the disassembly state structure of the positioning piece of the present utility model;

[0026] Figure 4 It is a schematic diagram of the support rod structure of the present utility model;

[0027] Figure 5 It is a schematic diagram of the cross-sectional structure of the connection sleeve of the present utility model;

[0028] Figure 6 For the present utility model Figure 1 The enlarged structure schematic diagram at A in it.

[0029] In the figure: 1, rectangular pipe section; 2, bellows section; 3, first mounting plate; 4, second mounting plate; 5, docking threaded hole; 6, support rod; 7, connection sleeve; 8, positioning piece; 9, positioning groove; 10, fixing bolt; 11, telescopic spring; 12, sealing gasket. Detailed Implementation Modes

[0030] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present utility model.

[0031] In this embodiment, in order to solve the problem that the device droops and bends due to its own gravity when installed horizontally, the following technical solution is provided. An anti-bending effect is provided by a support mechanism, and specifically, it is disclosed that: it includes a rectangular pipe section 1 with a hollow rectangular structure, and a corrugated pipe section 2 is arranged in the middle of the rectangular pipe section 1. First mounting plates 3 and second mounting plates 4 for docking with the main pipeline are respectively and fixedly installed on the upper and lower sides of the rectangular pipe section 1, and docking threaded holes 5 penetrating up and down are equidistantly opened inside the first mounting plates 3 and the second mounting plates 4. A support mechanism for increasing the overall anti-bending effect of the device is arranged between the first mounting plates 3 and the second mounting plates 4. The support mechanism includes four longitudinally arranged support rods 6 that are symmetric left and right. Connecting sleeves 7 are installed at the upper and lower ends of the support rods 6, and a through-type telescopic structure is formed between the connecting sleeves 7 and the support rods 6. A telescopic spring 11 for squeezing the support rods 6 is fixedly installed inside the connecting sleeves 7, and positioning pieces 8 are fixedly installed outside the connecting sleeves 7.

[0032] When the device is installed horizontally, first, the docking threaded holes 5 in the first mounting plates 3 and the second mounting plates 4 are used to cooperate with bolts to be fixedly docked with the main pipeline. At this time, the support rods 6 are installed between the first mounting plates 3 and the second mounting plates 4, and the support rods 6 are used to provide a pulling effect, thereby avoiding bending deformation at the middle position of the device. When the corrugated pipe section 2 expands and contracts due to thermal expansion and contraction, the support rods 6 synchronously expand and contract inside the connecting sleeves 7 to change the overall length, and at the same time, the telescopic springs 11 inside the connecting sleeves 7 are squeezed.

[0033] An insertion-type detachable installation structure is formed between the positioning pieces 8 and positioning grooves 9 opened on the surfaces of the first mounting plates 3 and the second mounting plates 4, and fixing bolts 10 for fixing the positioning pieces 8 are installed outside the positioning grooves 9. Rubber sealing gaskets 12 are fixedly installed on the outer surfaces of the first mounting plates 3 and the second mounting plates 4.

[0034] When the device is installed vertically, the support mechanism can not be installed. At this time, the fixing bolts 10 above the positioning grooves 9 are loosened, and then the positioning pieces 8 are moved out from the side, so as to remove the support mechanism, reduce the overall waste, and use the sealing gaskets 12 to improve the sealing effect at the docking position.

[0035] In this embodiment, in order to solve the problem of poor use effect in the manufacturing and use of traditional devices, the following technical solution is provided, and the following manufacturing method is specifically disclosed:

[0036] S1. According to the requirements of the number of waves, wave depth, wave distance, wave thickness and inner diameter size of the designed rectangular corrugated pipe, cut the rectangular sheet metal well, and use a straight seam welding machine to butt the sheet metal into a cylindrical pipe blank;

[0037] S2. First, put the cylindrical pipe blank on the material supporting column set by the expanding piece, and expand it into a rectangular pipe blank according to the perimeter of the material;

[0038] S3. Then, put the rectangular pipe blank around the periphery of the mold and place it on the tray that can move up and down and is arranged below the mold, and adjust the distance of each wave expansion according to the wave number, wave depth, and wave pitch.

[0039] S4. The mold is mainly composed of an expanding sheet, an outer mold, and a hammer head that move up and down to form a rectangle, and has the function of mechanically expanding a rectangular corrugated pipe.

[0040] The mechanical expanding mold used in S4 is composed of a mold bottom plate, a support plate, a base, an expanding sheet, a hammer head, and an outer mold to form a rectangular mold. The expanding sheet is further divided into several arc expanding sheets and straight expanding sheets. The expanding sheet is provided with a dovetail key for linear guidance and a trapezoidal key inclined at 15°.

[0041] In the description of the present invention, unless otherwise specified, the meaning of "a plurality of" is two or more; the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation on the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0042] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. One - time - formed rectangular bellows with four rounded corners, including a rectangular pipe section (1) in a hollow rectangular structure, and a bellows section (2) is arranged in the middle of the rectangular pipe section (1), characterized in that, Further included are: On the upper and lower sides of the rectangular pipe section (1), a first mounting plate (3) and a second mounting plate (4) for docking with the main pipeline are fixedly installed respectively, and docking threaded holes (5) penetrating up and down are equidistantly arranged inside the first mounting plate (3) and the second mounting plate (4); A support mechanism for enhancing the overall anti-bending effect of the device is arranged between the first mounting plate (3) and the second mounting plate (4), and the support mechanism includes four longitudinally arranged support rods (6) symmetrically arranged on the left and right.

2. The one-time formed rectangular bellows with four arc corners according to claim 1, wherein: Connection sleeves (7) are installed at the upper and lower ends of the support rods (6), and a through-type telescopic structure is formed between the connection sleeves (7) and the support rods (6).

3. The one-time formed rectangular corrugated pipe with four arc corners according to claim 2, characterized in that: A telescopic spring (11) for extruding the support rods (6) is fixedly installed inside the connection sleeves (7), and positioning pieces (8) are fixedly installed outside the connection sleeves (7).

4. The one-piece formed rectangular bellows with four arc corners according to claim 3, characterized in that: An insertion-type detachable installation structure is formed between the positioning pieces (8) and positioning grooves (9) formed on the surfaces of the first mounting plate (3) and the second mounting plate (4), and fixing bolts (10) for fixing the positioning pieces (8) are installed outside the positioning grooves (9).

5. The one-time formed rectangular corrugated pipe with four arc corners according to claim 4, characterized in that: Rubber sealing gaskets (12) are fixedly installed on the outer surfaces of the first mounting plate (3) and the second mounting plate (4).

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