Welding-free pipeline flange mounting structure

Abstract

The utility model discloses a welding-free pipeline flange mounting structure, which comprises a pipeline main body, a conical sealing sleeve, a sealing flange and a locking nut, the inner diameter of the conical sealing sleeve is in clearance fit with the diameter of the pipeline main body, the conical sealing sleeve is divided into two sections, one end of the conical sealing sleeve is a conical barrel section, and the other end of the conical sealing sleeve is a conical barrel section. One end of the conical sealing sleeve is a conical barrel section, the other end of the conical sealing sleeve is a cylindrical section, an annular clamping groove is formed in the outer wall of the conical barrel section of the conical sealing sleeve, two annular ring grooves are formed in the inner wall of the conical barrel section of the conical sealing sleeve, O-shaped sealing rings are arranged in the annular clamping groove and the annular ring grooves, and sawteeth are arranged on the inner wall of the cylindrical section of the conical sealing sleeve. An external thread is arranged on the outer wall of the cylindrical section of the conical sealing sleeve, the locking nut is in threaded connection with the external thread, and an open groove is formed in the cylindrical section of the conical sealing sleeve. The utility model has the beneficial effects of firm and stable fixation, improved safety, simple structure, convenience in manufacture, low manufacturing cost, no need of fire operation during installation and operation, and suitability for explosion-proof places.

Description

Technical Field

[0001] The utility model relates to the technical field of explosion-proof area mounting flanges, in particular to a pipeline flange mounting structure that does not require welding. Background Art

[0002] Coal chemical production uses coal as raw material and converts it into gas, liquid and solid fuels and chemicals through chemical processing. Specifically, it includes coal gasification, liquefaction, distillation and other processing processes. In the coal chemical production and transportation process, the most common way of connecting the transportation pipeline is to connect it through flanges. Some pipelines need to install flanges, and the commonly used method is welding. However, hot work in chemical areas is very dangerous, and some dangerous media pipelines cannot be operated with hot work.

[0003] It should be noted that the above contents belong to the technical knowledge of the inventor and do not necessarily constitute prior art. Utility Model Content

[0004] The utility model aims to solve the above problems and designs a pipeline flange installation structure which does not require welding.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A pipe flange installation structure that does not require welding comprises a pipe body, a conical sealing sleeve, a sealing flange and a locking nut. The conical sealing sleeve, the sealing flange and the locking nut are sleeved on the pipe body. The inner diameter of the conical sealing sleeve is clearance-matched with the diameter of the pipe body. The conical sealing sleeve is divided into two sections. One end of the conical sealing sleeve is a conical barrel section, and the other end of the conical sealing sleeve is a cylindrical section. An annular groove is provided on the outer wall of the conical barrel section of the conical sealing sleeve, and two annular ring grooves are provided on the inner wall of the conical barrel section of the conical sealing sleeve. O-rings are provided in the annular groove and the annular ring grooves. The inner wall of the cylindrical section of the conical sealing sleeve is provided with serrations, and the outer wall of the cylindrical section of the conical sealing sleeve is provided with an external thread. The locking nut is threadedly connected to the external thread, and the cylindrical section of the conical sealing sleeve is provided with a slot.

[0007] Furthermore, the inner diameter of the sealing flange and the conical barrel section of the conical sealing sleeve are inclined surfaces with the same taper.

[0008] Furthermore, the locking nut is provided with a threaded through hole, the threaded through hole is threadedly connected with a fixing screw, and one end of the fixing screw is in contact with the conical sealing sleeve.

[0009] Furthermore, there are two slots, and the two slots are located opposite to each other.

[0010] Furthermore, the locking nut, the sealing flange and the conical sealing sleeve are sequentially installed on the pipeline body.

[0011] Compared with the prior art, this technical solution has the following beneficial effects:

[0012] The conical surface of the sealing flange is tightly fitted with the conical barrel section of the conical sealing sleeve through the locking nut, squeezing the O-ring in the annular groove for sealing. At the same time, the conical barrel section of the conical sealing sleeve is forced to squeeze the O-rings in the two annular grooves, squeezing the O-rings and the pipeline body to form a seal, with good sealing effect to avoid leakage;

[0013] The cylindrical section of the conical sealing sleeve is squeezed by the locking nut, and the cylindrical section of the conical sealing sleeve is fitted toward the pipe body through the slot. The serrations in the cylindrical section of the conical sealing sleeve are pressed against the pipe body, which increases the friction and prevents the conical sealing sleeve from falling off. The fixing is reliable and stable, and the safety is improved. The structure is simple, the manufacturing is convenient, the manufacturing cost is low, and the installation operation does not require the use of flames. It is suitable for explosion-proof places. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a structural schematic diagram of a pipeline flange installation structure that does not require welding described in the utility model.

[0015] Figure 2 This is the sealing flange after installation.

[0016] Figure 3 An enlarged cross-sectional view of the locking nut.

[0017] Figure 4 It is an enlarged cross-sectional view of the tapered sealing sleeve.

[0018] Figure 5 An enlarged top view of the conical sealing sleeve.

[0019] In the figure: 1. Pipe body; 2. Conical sealing sleeve; 3. Sealing flange; 4. Locking nut; 5. Conical barrel section; 6. Cylinder section; 7. Annular groove; 8. Annular ring groove; 9. O-ring; 10. Serration; 11. External thread; 12. Slot; 13. Threaded through hole; 14. Fixing screw. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are 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 understood as a limitation on the present invention. In addition, in the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0022] The utility model provides Figure 1-5 The pipe flange installation structure shown in the figure does not require welding, comprises a pipe body 1, a conical sealing sleeve 2, a sealing flange 3 and a locking nut 4, the conical sealing sleeve 2, the sealing flange 3 and the locking nut 4 are sleeved on the pipe body 1, the inner diameter of the conical sealing sleeve 2 is clearance-matched with the diameter of the pipe body 1, the conical sealing sleeve 2 is divided into two sections, one end of the conical sealing sleeve 2 is a conical barrel section 5, the other end of the conical sealing sleeve 2 is a cylindrical section 6, an annular groove 7 is provided on the outer wall of the conical barrel section 5 of the conical sealing sleeve 2, two annular ring grooves 8 are provided on the inner wall of the conical barrel section 5 of the conical sealing sleeve 2, an O-ring 9 is provided in the annular groove 7 and the annular ring groove 8, a serration 10 is provided on the inner wall of the cylindrical section 6 of the conical sealing sleeve 2, an external thread 11 is provided on the outer wall of the cylindrical section 6 of the conical sealing sleeve 2, the locking nut 4 is threadedly connected with the external thread 11, and the cylindrical section 6 of the conical sealing sleeve 2 is provided with a slot 12,

[0023] According to the specifications of the pipeline body 1, a conical sealing sleeve 2, a sealing flange 3 and a locking nut 4 are manufactured. During installation, impurities on the surface of the pipeline body 1 are first cleaned, and the locking nut 4, the sealing flange 3 and the conical sealing sleeve 2 are installed on the pipeline body 1 in sequence. The O-ring 9 is respectively sleeved in the annular groove 7 and the two annular grooves 8, and the conical surface of the sealing flange 3 is fitted with the conical barrel section 5 of the conical sealing sleeve 2. The locking nut 4 is threadedly connected with the external thread 11 on the cylindrical section 6 of the conical sealing sleeve 2, and the conical surface of the sealing flange 3 is closely fitted with the conical barrel section 5 of the conical sealing sleeve 2 through the locking nut 4, and the O-ring 9 in the annular groove 7 is squeezed for sealing. When the conical barrel section 5 of the conical sealing sleeve 2 is forced to squeeze the O-rings 9 in the two annular grooves 8, the O-rings 9 are squeezed to form a seal with the pipeline body 1, the sealing effect is good, and leakage is avoided. When the locking nut 4 is threadedly connected with the external thread 11, the locking nut 4 squeezes the cylindrical section 6 of the conical sealing sleeve 2, and the cylindrical section 6 of the conical sealing sleeve 2 is fitted toward the pipeline body 1 through the groove 12. The serrations 10 in the cylindrical section 6 of the conical sealing sleeve 2 are pressed with the pipeline body 1, which increases the friction force and avoids the conical sealing sleeve 2 from falling off. The fixing is reliable and stable, and the safety is improved. The structure is simple, the production is convenient, the manufacturing cost is low, and the installation operation does not require the use of fire, which is suitable for explosion-proof places.

[0024] Refer to the instruction manual Figure 1 And the instruction manual Figure 2 The inner diameter of the sealing flange 3 and the conical barrel section 5 of the conical sealing sleeve 2 are inclined surfaces with the same taper.

[0025] The inclined surface of the inner diameter of the sealing flange 3 matches the inclined surface of the conical barrel section 5 of the conical sealing sleeve 2. When fixedly installed, the sealing flange 3 and the conical sealing sleeve 2 fit more closely to avoid leakage caused by gaps.

[0026] Refer to the instruction manual Figure 1 And the instruction manual Figure 3 The locking nut 4 is provided with a threaded through hole 13, and a fixing screw 14 is threadedly connected to the threaded through hole 13, and one end of the fixing screw 14 is in contact with the conical sealing sleeve 2.

[0027] After the locking nut 4 is locked with the external thread 11, the fixing screw 14 is tightened, and one end of the fixing screw 14 contacts the conical sealing sleeve 2 to prevent the locking nut 4 from loosening and falling off, and the fixation is more secure and stable.

[0028] Refer to the instruction manual Figure 5 There are two slots 12, and the two slots 12 are located opposite to each other.

[0029] By providing two slots 12 , the cylindrical section 6 of the conical sealing sleeve 2 can fit toward the pipe body 1 , so that the serrations 10 fit tightly against the pipe body 1 .

[0030] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A pipe flange installation structure without welding, comprising a pipe body (1), a conical sealing sleeve (2), a sealing flange (3) and a locking nut (4), wherein the conical sealing sleeve (2), the sealing flange (3) and the locking nut (4) are sleeved on the pipe body (1), characterized in that: The inner diameter of the conical sealing sleeve (2) is clearance-matched with the diameter of the pipeline body (1). The conical sealing sleeve (2) is divided into two sections. One end of the conical sealing sleeve (2) is a conical barrel section (5), and the other end of the conical sealing sleeve (2) is a cylindrical section (6). An annular groove (7) is provided on the outer wall of the conical barrel section (5) of the conical sealing sleeve (2). Two annular ring grooves (8) are provided on the inner wall of the conical barrel section (5) of the conical sealing sleeve (2). O-type sealing rings (9) are provided in the annular grooves (7) and the annular ring grooves (8). The inner wall of the cylindrical section (6) of the conical sealing sleeve (2) is provided with saw teeth (10). The outer wall of the cylindrical section (6) of the conical sealing sleeve (2) is provided with an external thread (11). The locking nut (4) is threadedly connected to the external thread (11). The cylindrical section (6) of the conical sealing sleeve (2) is provided with a slot (12).

2. The pipe flange installation structure without welding according to claim 1 is characterized in that: The inner diameter of the sealing flange (3) and the conical barrel section (5) of the conical sealing sleeve (2) are inclined surfaces with the same taper.

3. The pipe flange installation structure without welding according to claim 1 is characterized in that: The locking nut (4) is provided with a threaded through hole (13), and a fixing screw (14) is threadedly connected to the threaded through hole (13), and one end of the fixing screw (14) is in contact with the conical sealing sleeve (2).

4. The pipe flange installation structure without welding according to claim 1 is characterized in that: Two of the slots (12) are provided, and the two slots (12) are located opposite to each other.

5. The pipe flange installation structure without welding according to claim 1 is characterized in that: The locking nut (4), the sealing flange (3) and the conical sealing sleeve (2) are sequentially mounted on the pipeline body (1).

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