Corrosion-resistant straight pipe

Abstract

The utility model relates to the technical field of straight pipes, in particular to a corrosion-resistant straight pipe, which comprises a straight pipe main body, and an internal thread part and an external thread connecting part which are respectively arranged at two ends of the straight pipe main body, the two ends of the straight pipe main body are sleeved with flange plates, the straight pipe main body is fixedly connected with the flange plates, a plurality of annularly distributed threaded holes are formed in the flange plates, and a plurality of connecting bolts are arranged in one flange plate in a penetrating mode. The two straight pipe bodies are installed in a butt joint mode, at the moment, the sealing metal ring is embedded into the annular groove, abrasion can be reduced through the sealing metal ring, and due to the fact that the sealing metal ring is attached to the annular groove, sealing treatment can be provided for the butt joint portion of the two straight pipe bodies, and the sealing performance of the two straight pipe bodies can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of straight pipes, in particular to a corrosion-resistant straight pipe. Background Art

[0002] The corrosion-resistant straight pipe is made of corrosion-resistant alloy and coated with corrosion-resistant coating on the surface of the corrosion-resistant straight pipe to enhance the corrosion resistance of the corrosion-resistant straight pipe. It can be widely used in chemical industry, pharmaceutical industry, etc. to transport liquid or gas.

[0003] In the prior art, in a corrosion-resistant straight pipe with a publication number of CN208090100U, the utility model discloses a corrosion-resistant straight pipe, the technical solution of which includes a straight pipe body, one end of the straight pipe body is provided with a threaded plug-in body, the inner side wall of the threaded plug-in body is provided with an internal thread, and the other end of the straight pipe body is provided with a threaded connection body, the threaded connection body is provided with a threaded plug-in groove matching the threaded plug-in body, and the inner side wall of the threaded plug-in groove is provided with an external thread matching the internal thread. Generally, when two corrosion-resistant straight pipes are connected, the threaded plug-in body on the corresponding straight pipe body is aligned with the threaded plug-in groove, and then the corresponding corrosion-resistant straight pipe is rotated along the direction of the internal thread line or the external thread line so that the threaded plug-in body is gradually plugged into the threaded plug-in groove, thereby playing the role of installing and fixing the two corrosion-resistant straight pipes, but the general corrosion-resistant straight pipe has the following problems:

[0004] When two corrosion-resistant straight pipes are butt-jointed, a sealing ring is used to provide sealing. However, since the butt-jointed two corrosion-resistant straight pipes will squeeze and wear the sealing ring, it is easy to cause the sealing ring to break or age, which reduces the sealing performance of the butt-jointed two corrosion-resistant straight pipes. Therefore, we propose a corrosion-resistant straight pipe. Utility Model Content

[0005] The utility model aims to provide a corrosion-resistant straight pipe to solve the problems raised in the above-mentioned background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A corrosion-resistant straight pipe, comprising:

[0008] A straight pipe body, and an internal threaded portion and an external threaded connection portion respectively provided at two ends of the straight pipe body;

[0009] Both ends of the straight pipe body are sleeved with flanges, the straight pipe body is fixedly connected to the flanges, a plurality of threaded holes distributed in an annular shape are opened inside the flanges, and a plurality of connecting bolts are penetrated inside one of the flanges.

[0010] Preferably, the internal threaded portion is threadably matched with the external threaded connection portion.

[0011] Preferably, an annular groove is provided inside one of the flanges.

[0012] Preferably, the other flange is fixed with a sealing metal ring.

[0013] Preferably, the ring groove is matched with a sealing metal ring.

[0014] Preferably, the straight pipe body is made of corrosion-resistant alloy.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] The utility model can screw the external thread connection part at one end of a straight pipe body into the internal thread part of another straight pipe body, tighten the threads of the two straight pipe bodies, align the threaded holes of the adjacent flanges on the two straight pipe bodies, and pass the connecting bolts through the threaded holes of the two flanges in sequence to butt-jointly install the two straight pipe bodies.

[0017] The two straight pipe bodies provided in the utility model are butt-jointed and installed. At this time, the sealing metal ring is embedded in the inside of the ring groove. The wear can be reduced by the sealing metal ring. Since the sealing metal ring fits the ring groove, it can be used to provide sealing treatment for the butt joint of the two straight pipe bodies and improve the sealing performance of the two straight pipe bodies. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the internal structure of the straight pipe of the utility model;

[0019] Figure 2 This is a schematic diagram of the structure of the straight pipe of the utility model;

[0020] Figure 3 It is a schematic diagram of the connection structure of two straight pipes of the utility model.

[0021] In the figure:

[0022] 1. Straight pipe body; 2. Internal threaded part; 3. External threaded connection part; 4. Flange; 5. Threaded hole; 6. Ring groove; 7. Sealing metal ring; 8. Connecting bolts. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0024] See also Figure 1-3 , a corrosion-resistant straight pipe, comprising:

[0025] A straight pipe body 1, and an internal threaded portion 2 and an external threaded connection portion 3 respectively opened at both ends of the straight pipe body 1, the straight pipe body 1 is made of corrosion-resistant alloy, the internal threaded portion 2 and the external threaded connection portion 3 are threadedly matched, both ends of the straight pipe body 1 are sleeved with flanges 4, the straight pipe body 1 is fixedly connected to the flange 4, and a plurality of annularly distributed threaded holes 5 are opened inside the flange 4, and a plurality of connecting bolts 8 are penetrated inside one of the flanges 4.

[0026] Specifically, the external threaded connection part 3 at one end of a straight pipe body 1 can be screwed into the internal threaded part 2 of another straight pipe body 1, the two straight pipe bodies 1 can be screwed tightly, and the threaded holes 5 of the adjacent flanges 4 on the two straight pipe bodies 1 can be aligned, and the connecting bolts 8 can be passed through the threaded holes 5 of the two flanges 4 in turn to connect and install the two straight pipe bodies 1.

[0027] like Figure 1 and Figure 2 As shown, a ring groove 6 is formed inside one flange 4 , and a sealing metal ring 7 is fixed to the other flange 4 , and the ring groove 6 is matched with the sealing metal ring 7 .

[0028] Specifically, the two straight pipe bodies 1 are butt-jointed and installed. At this time, the sealing metal ring 7 is embedded in the ring groove 6. The sealing metal ring 7 can reduce wear. Since the sealing metal ring 7 fits the ring groove 6, it can be used to provide sealing treatment for the butt joint of the two straight pipe bodies 1 and improve the sealing performance of the two straight pipe bodies 1.

[0029] Straight pipe butt installation:

[0030] The external threaded connection portion 3 at one end of a straight pipe body 1 can be screwed into the internal threaded portion 2 of another straight pipe body 1, the two straight pipe bodies 1 can be screwed together, and the threaded holes 5 of the adjacent flanges 4 on the two straight pipe bodies 1 can be aligned. The connecting bolts 8 can be passed through the threaded holes 5 of the two flanges 4 in turn to connect and install the two straight pipe bodies 1.

[0031] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A corrosion-resistant straight pipe, characterized in that: include: A straight pipe body (1), and an internal threaded portion (2) and an external threaded connection portion (3) respectively disposed at two ends of the straight pipe body (1); Both ends of the straight pipe body (1) are sleeved with flanges (4), the straight pipe body (1) is fixedly connected to the flanges (4), a plurality of threaded holes (5) distributed in an annular shape are opened inside the flanges (4), and a plurality of connecting bolts (8) are penetrated inside one of the flanges (4); A ring groove (6) is formed inside the flange (4); The other flange (4) is fixed with a sealing metal ring (7); The annular groove (6) is matched with the sealing metal ring (7).

2. A corrosion-resistant straight pipe according to claim 1, characterized in that: The internal threaded portion (2) is threadably matched with the external threaded connection portion (3).

3. The corrosion-resistant straight pipe according to claim 1, characterized in that: The straight pipe body (1) is made of corrosion-resistant alloy.

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