Mounting structure of corrugated pipe

Abstract

The utility model discloses a mounting structure of a corrugated pipe, which comprises a welding head, a connecting head, a check nut and a flange piece, the length of the welding head is larger than that of the connecting head, the welding head and the connecting head are hollow, the outer diameter of the welding head is smaller than the inner diameter of the connecting head, a boss is coaxially arranged on the welding head, and the outer diameter of the boss is larger than the inner diameter of the connecting head; the welding head comprises a first threaded section, the connector comprises a second threaded section and a second smooth section, and the flange piece is coaxially arranged on the second smooth section; a fixed state and a movable state are formed among the welding head, the connector and the check nut, in the fixed state, the welding head is sleeved with the connector, the second threaded section abuts against the boss, the first threaded section penetrates out of the connector, and the check nut is screwed on the first threaded section and abuts against the second smooth section. According to the structure, the connector can be rotated at will to align the hole positions in the flange pieces, the stainless steel corrugated pipe cannot rotate during installation, and installation and fixation of the stainless steel corrugated pipe are facilitated.

Description

Technical Field

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

[0002] The bellows is a kind of elastic pipe fitting. Stainless steel bellows are often used in the assembly of integrated stoves. Flanges are often fixed on the ends of the stainless steel bellows. When installing the bellows, due to the small installation space inside the integrated stove and the complicated installation situation, after fixing one end of the bellows, the rotation angle of the end of the bellows with the flange is small, so that the installation hole on the flange cannot be aligned with the pre-set fixing hole on the integrated stove, thus affecting the installation of the stainless steel bellows and the pipe fitting to be connected. Therefore, it is necessary to improve this. Summary of the invention

[0003] The utility model provides a new installation structure for a bellows, aiming at the defects in the prior art that when installing a bellows, one end is fixed first, which results in the inability to adjust the angle of the end of the bellows with a flange installed, thus causing installation difficulties.

[0004] In order to solve the above technical problems, the utility model is implemented through the following technical solutions:

[0005] A bellows installation structure comprises a welding head, a connecting head, a tightening nut and a flange, wherein the length of the welding head is greater than that of the connecting head, the welding head and the connecting head are hollow inside, the outer diameter of the welding head is smaller than the inner diameter of the connecting head, a boss is coaxially arranged on the welding head, and the outer diameter of the boss is greater than the inner diameter of the connecting head; the welding head comprises a first threaded section, the connecting head comprises a second threaded section and a second smooth section, and the flange is coaxially arranged on the second smooth section; a fixed state and an active state are formed between the welding head, the connecting head and the tightening nut, and in the fixed state, the connecting head is sleeved on the welding head, the second threaded section is pressed against the boss, the first threaded section passes through the connecting head, and the tightening nut is screwed on the first threaded section and pressed against the second smooth section.

[0006] During installation, the stainless steel bellows is passed through the welding head and the connecting head is sleeved on the outside of the welding head. The connecting head can be rotated at will to align the holes on the flange with the holes on the large enclosure of the integrated stove, which is convenient for fixing the flange on the large enclosure of the integrated stove. At this time, the connecting head is pressed against the welding head by tightening the nut, so that when the pipe to be connected is tightened on the second threaded section to fix the stainless steel bellows and the pipe to be connected, the stainless steel bellows inside the welding head will not rotate, which also increases the torque between the pipe to be connected and the second threaded section, facilitating the installation and fixation between the stainless steel bellows and the integrated stove.

[0007] Preferably, in the above-mentioned installation structure of the corrugated pipe, a hexagonal nut is provided on the second smooth section, and the flange is distributed between the hexagonal nut and the second threaded section.

[0008] When the large enclosure of the integrated stove is not provided with a fixing hole for installing the flange and the pipe to be connected cannot rotate, the connecting head can be conveniently driven to rotate by the hexagonal nut, so that the second threaded section can be tightened in the pipe to be connected, thereby realizing the installation and fixation of the bellows.

[0009] Preferably, in the above-mentioned installation structure of a corrugated pipe, the welding head further comprises a first smooth section, and the first smooth section is distributed between the first threaded section and the boss.

[0010] The first smooth section is provided so that the connecting head will not get stuck when it rotates around the welding head.

[0011] Preferably, in the above-mentioned installation structure of a corrugated pipe, a first back-off groove is provided on the welding head, and the first threaded section is distributed between the first back-off groove and the first smooth section.

[0012] The first backing groove facilitates welding of the welding head to the stainless steel bellows, thereby improving the convenience of fixing the bellows.

[0013] Preferably, the above-mentioned installation structure of the corrugated pipe further includes a nut wrench, which is annular and has a protrusion, and the nut wrench cooperates with the hexagonal nut and the tightening nut.

[0014] The nut wrench is set in a ring shape so that the nut wrench can be sleeved on the outside of the hexagonal nut and the tightening nut, preventing the nut wrench from easily falling off when rotating the hexagonal nut and the tightening nut. The convex block provides a fulcrum for the user, making it convenient to turn the nut wrench.

[0015] Preferably, in the above-mentioned installation structure of the corrugated pipe, a second tool retreat groove is formed on the second smooth section.

[0016] The provision of the second undercut groove facilitates welding of different types of flanges on the connecting head, thereby being adaptable to different installation conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the explosion structure of the utility model stainless steel bellows installed in the connector;

[0018] Figure 2 This is a structural schematic diagram of the utility model in which the connecting head and the welding head are in a fixed state;

[0019] Figure 3 It is a structural schematic diagram of the connector of the utility model. DETAILED DESCRIPTION

[0020] The following is combined with Figure 1-3 The present invention is further described in detail with the following specific embodiments, but they are not intended to limit the present invention:

[0021] Example 1

[0022] like Figure 1 , Figure 2 , Figure 3 As shown, a bellows installation structure includes a welding head 1, a connecting head 2, a tightening nut 3 and a flange 4, the length of the welding head 1 is greater than the length of the connecting head 2, the welding head 1 and the connecting head 2 are hollow inside, the outer diameter of the welding head 1 is smaller than the inner diameter of the connecting head 2, a boss 5 is coaxially arranged on the welding head 1, and the outer diameter of the boss 5 is greater than the inner diameter of the connecting head 2; the welding head 1 includes a first threaded section 11, the connecting head 2 includes a second threaded section 21 and a second smooth section 22, and the flange 4 is coaxially arranged on the second smooth section 22; a fixed state and an active state are formed between the welding head 1, the connecting head 2 and the tightening nut 3, in the fixed state, the connecting head 2 is sleeved on the welding head 1, the second threaded section 21 is pressed against the boss 5, the first threaded section 11 passes through the connecting head 2, and the tightening nut 3 is screwed on the first threaded section 11 and pressed against the second smooth section 22.

[0023] Preferably, a hexagonal nut 6 is provided on the second smooth section 22 , and the flange 4 is distributed between the hexagonal nut 6 and the second threaded section 21 .

[0024] Preferably, the welding head 1 further includes a first smooth section 12 , and the first smooth section 12 is distributed between the first threaded section 11 and the boss 5 .

[0025] Preferably, a first undercut groove 10 is formed on the welding head 1 , and the first thread segment 11 is distributed between the first undercut groove 10 and the first smooth segment 12 .

[0026] Preferably, the utility model further comprises a nut spanner 7 , which is annular in shape and is provided with a protrusion 71 , and the nut spanner 7 cooperates with the hexagonal nut 6 and the tightening nut 3 .

[0027] Preferably, a second tool retreat groove 221 is formed on the second smooth section 22 .

[0028] Specifically, when installing the stainless steel bellows, first pre-install one end of the stainless steel bellows through a nut and a rubber pad, and then install the other end of the stainless steel bellows with the pipe fitting to be connected through a welding head 1 and a connecting head 2.

[0029] When the stainless steel corrugated pipe is installed with the pipe fitting to be butted, the following three installation methods are usually adopted according to whether the pipe fitting to be butted and the second threaded section 21 can rotate.

[0030] like Figure 1-Figure 3 As shown, the first installation method is: first, pass the end of the stainless steel bellows through the connecting head 2, then pass the first threaded section 11 through the end of the connecting head 2 installed with the hexagonal nut 6, and then rotate the connecting head 2 to align the hole positions on the flange 4 with the hole positions on the large enclosure of the integrated stove, and then fix the flange 4 on the large enclosure of the integrated stove. At this time, the second threaded section 21 cannot rotate, and then use the nut wrench 7 to tighten the tightening nut 3 on the first threaded section 11 and make the tightening nut 3 and the hexagonal nut 6 abut against each other, and then press the connecting head 2 on the boss 5. At this time, the welding head 1 and the stainless steel bellows are welded and fixed through the first backing groove 10, and the pipe fitting to be connected is tightened on the second threaded section 21, so that the stainless steel bellows can be fixed without driving the stainless steel bellows to rotate.

[0031] The second installation method: first pass the end of the stainless steel bellows through the connecting head 2, then pass the first threaded section 11 through the end of the connecting head 2 installed with the hexagonal nut 6, and then pass the welding head 1 through the large enclosure of the integrated stove and make the large enclosure of the integrated stove distributed between the hexagonal nut 6 and the tightening nut 3, and then tighten the tightening nut 3 on the first threaded section 11, so that the welding head 1 and the connecting head 2 can be fixed on the large enclosure of the integrated stove through the hexagonal nut 6 and the tightening nut 3. At this time, tighten the pipe fitting to be connected to the second threaded section 21, so that the stainless steel bellows can be fixed without driving the stainless steel bellows to rotate, and there is no need to fix the flange 4, which facilitates the installation of the stainless steel bellows.

[0032] The third installation method: When the butted pipe fittings cannot be rotated, first fix the stainless steel bellows, welding head 1, and connecting head 2 according to the first installation method, then clamp the nut wrench 7 on the hexagonal nut 6 and drive the second threaded section 21 to be tightened in the butted pipe fittings through the hexagonal nut 6. At this time, the installation can be completed without twisting the stainless steel bellows.

[0033] In conclusion, the above is only a preferred embodiment of the present invention, and all equivalent changes and modifications made within the scope of the patent application for the present invention should fall within the scope of the present invention.

Claims

1. A bellows installation structure, characterized in that: The invention comprises a welding head (1), a connecting head (2), a tightening nut (3) and a flange (4); the length of the welding head (1) is greater than the length of the connecting head (2); the welding head (1) and the connecting head (2) are hollow inside; the outer diameter of the welding head (1) is smaller than the inner diameter of the connecting head (2); a boss (5) is coaxially arranged on the welding head (1); the outer diameter of the boss (5) is greater than the inner diameter of the connecting head (2); the welding head (1) comprises a first thread segment (11); and the connecting head (2) comprises a second thread segment (21). The flange (4) is coaxially arranged on the second smooth section (22); a fixed state and a movable state are formed between the welding head (1), the connecting head (2) and the tightening nut (3); in the fixed state, the connecting head (2) is sleeved on the welding head (1), the second threaded section (21) is pressed against the boss (5), the first threaded section (11) passes through the connecting head (2), and the tightening nut (3) is screwed on the first threaded section (11) and pressed against the second smooth section (22).

2. The installation structure of a corrugated pipe according to claim 1, characterized in that: A hexagonal nut (6) is arranged on the second smooth section (22), and the flange (4) is distributed between the hexagonal nut (6) and the second threaded section (21).

3. The installation structure of a corrugated pipe according to claim 1, characterized in that: The welding head (1) further comprises a first smooth section (12), wherein the first smooth section (12) is distributed between the first threaded section (11) and the boss (5).

4. The installation structure of a corrugated pipe according to claim 3, characterized in that: The welding head (1) is provided with a first undercut groove (10), and the first threaded section (11) is distributed between the first undercut groove (10) and the first smooth section (12).

5. The installation structure of a corrugated pipe according to claim 2, characterized in that: The invention also comprises a nut spanner (7), which is annular and has a protrusion (71). The nut spanner (7) cooperates with the hexagonal nut (6) and the tightening nut (3).

6. The installation structure of a corrugated pipe according to claim 1, characterized in that: The second smooth section (22) is provided with a second tool retreat groove (221).

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