Corrosion resistant welded steel pipe

Abstract

The utility model discloses a kind of corrosion-resistant welded steel pipes, including steel pipe body and butt steel pipe, snap-fit assembly is equipped between steel pipe body and butt steel pipe, the one end of butt steel pipe close to steel pipe body is equipped with butt joint groove, multiple clamping slots are equipped with on butt joint groove, the one end of steel pipe body close to butt steel pipe is equipped with clamping plate, multiple clamping balls are equipped with on the top end of clamping plate, fixed hole is equipped with on the outside of butt steel pipe and clamping plate, fixed bolt is equipped with in fixed hole, movable limiting groove is equipped with in the top end of butt joint groove. The utility model is through adding snap-fit assembly between two embedded steel pipes, by clamping ball aiming at clamping slot and rotating and rotating into movable limiting groove, rotating fixed bolt carries out first fixing to two embedded steel pipes, then install bolt is rotated into mounting hole, fixed clamping ring and butt plate are fixed again, improve the tightness of two embedded steel pipe connection.

Description

Technical Field

[0001] This utility model relates to a corrosion-resistant steel pipe device, specifically a corrosion-resistant welded steel pipe, belonging to the field of welded steel pipe technology. Background Technology

[0002] Welded steel pipes are steel pipes with seams on the surface, which are made by bending and deforming steel strips or plates into shapes such as circles and squares and then welding them together. The raw materials used for welded steel pipes are steel plates or steel strips. With the rapid development of high-quality strip steel continuous rolling production and the progress of welding and inspection technologies, the quality of welds has been continuously improved.

[0003] A search revealed Chinese patent CN217130732U, which discloses a corrosion-resistant welded steel pipe. This pipe utilizes the interplay between a first epoxy resin layer, a first curing agent layer, a second epoxy resin layer, and a second curing agent layer to ensure the quality of the welded steel pipe. This avoids the problem of the welded steel pipe itself lacking corrosion resistance, leading to damage and increased costs due to prolonged exposure to liquid corrosion. However, in this patented product, the connection between the two steel pipes involves inserting one end of a connecting pipe inside an external conduit into the welded steel pipe body and then securing it with screws. However, after prolonged use, the bolts may loosen, and there is still a risk of the two fitted steel pipes falling apart, resulting in an unstable connection. Utility Model Content

[0004] The purpose of this utility model is to provide a corrosion-resistant welded steel pipe in order to solve the above-mentioned problems.

[0005] This utility model achieves the above-mentioned objective through the following technical solution: a corrosion-resistant welded steel pipe, comprising a steel pipe body and a butt-jointing steel pipe, wherein a locking assembly is provided between the steel pipe body and the butt-jointing steel pipe, the locking assembly comprising a butt groove, a locking plate, locking balls, locking slots, fixing holes, fixing bolts, and a movable limiting slot; a butt groove is provided at one end of the butt-jointing steel pipe near the steel pipe body, and multiple locking slots are provided at equal intervals on the butt groove; a locking plate is provided at one end of the steel pipe body near the butt-jointing steel pipe, and multiple locking balls are provided at equal intervals on the top of the locking plate; fixing holes are provided on the outer side of the butt-jointing steel pipe and on the locking plate, and fixing bolts are provided in the fixing holes; and a movable limiting slot is provided at the top of the inner part of the butt groove.

[0006] Preferably, both the docking groove and the card plate are arranged in a ring shape.

[0007] Preferably, the position of the slot corresponds to the position of the ball, and the width of the slot is the same as the diameter of the ball.

[0008] Preferably, the width and height of the movable limiting groove are the same as the width and height of the card slot, and the movable limiting groove and the card slot are arranged in a "T" shape.

[0009] Preferably, the fixing hole is located at the middle position of the top of the movable limiting groove.

[0010] Preferably, a fixing ring is provided on the outer side of the end of the steel pipe body near the docking steel pipe, and multiple docking plates are provided at equal intervals on the outer side of the end of the docking steel pipe near the steel pipe body. The docking plates and the fixing ring are provided with mounting holes, the mounting holes penetrate the docking plates and the fixing ring, the mounting holes are equipped with mounting bolts, and the mounting bolts are equipped with fixing nuts.

[0011] The beneficial effects of this utility model are as follows: In the above-mentioned patented products, the connection of two steel pipes is achieved by inserting one end of the connecting pipe inside the external pipe into the interior of the welded steel pipe body and then fixing it with screws. However, after long-term use, the bolts may loosen, and there is still a risk of the two fitted steel pipes falling apart, resulting in an unstable connection. This utility model adds a locking component between the two fitted steel pipes. By aligning the locking ball with the locking groove and rotating it into the movable limiting groove, the fixing bolt is screwed in to fix the two fitted steel pipes for the first time. Then, the mounting bolt is screwed into the mounting hole to fix the fixing ring and the connecting plate again, thereby improving the tightness of the connection between the two fitted steel pipes. Attached Figure Description

[0012] Figure 1 This is a three-dimensional view of the overall structure of a corrosion-resistant welded steel pipe proposed in this utility model;

[0013] Figure 2 This is a three-dimensional view of the overall structure of a corrosion-resistant welded steel pipe proposed in this utility model;

[0014] Figure 3 for Figure 1 Enlarged view of the structure at point A in the middle;

[0015] Figure 4 This is a schematic diagram of the overall structure of a corrosion-resistant welded steel pipe proposed in this utility model.

[0016] Figure 5 for Figure 4 Enlarged view of the structure at point B in the middle.

[0017] In the diagram: 1. Steel pipe body; 101. Connecting steel pipe; 2. Clamping assembly; 201. Connecting groove; 202. Clamping plate; 203. Clamping ball; 204. Clamping groove; 205. Fixing hole; 206. Fixing bolt; 207. Movable limiting groove; 3. Fixing retaining ring; 301. Connecting plate; 302. Mounting bolt; 303. Mounting hole; 304. Fixing nut. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Please see Figure 1-5 As shown, a corrosion-resistant welded steel pipe includes a steel pipe body 1 and a connecting steel pipe 101. A locking assembly 2 is provided between the steel pipe body 1 and the connecting steel pipe 101. The locking assembly 2 includes a connecting groove 201, a locking plate 202, locking balls 203, locking slots 204, fixing holes 205, fixing bolts 206, and a movable limiting groove 207. The connecting steel pipe 101 is provided with a connecting groove 201 at one end near the steel pipe body 1. Multiple locking slots 204 are provided at equal intervals on the connecting groove 201. The steel pipe body 1 is provided with a locking plate 202 at one end near the connecting steel pipe 101. Multiple locking balls 203 are provided at equal intervals on the top of the locking plate 202. Fixing holes 205 are provided on the outside of the connecting steel pipe 101 and on the locking plate 202. Fixing bolts 206 are provided in the fixing holes 205. The movable limiting groove 207 is provided at the top of the connecting groove 201.

[0020] Both the docking groove 201 and the clamping plate 202 are annular. The position of the clamping groove 204 corresponds to the position of the clamping ball 203, and the groove width of the clamping groove 204 is the same as the diameter of the clamping ball 203.

[0021] The width and height of the movable limiting groove 207 are the same as those of the slot 204, and the movable limiting groove 207 and the slot 204 are arranged in a "T" shape.

[0022] According to the above embodiments, it should be noted that when welding two corrosion-resistant steel pipes, the clamping plate 202 at one end of the steel pipe body 1 is inserted into the docking groove 201 at one end of the docking steel pipe 101. Before insertion, the clamping ball 203 on the clamping plate 202 is aligned with the clamping groove 204 of the docking groove 201 so that the clamping plate 202 is horizontally inserted into the docking groove 201.

[0023] The ball 203 and the movable limiting groove 207 are both set in two groups. When the locking plate 202 is fully inserted into the docking groove 201, the position of the ball 203 is directly opposite the connection position between the movable limiting groove 207 and the locking groove 204. Rotate the steel pipe body 1 to make the ball 203 rotate into the movable limiting groove 207. Screw the fixing bolt 206 into the fixing hole 205 to limit the position of the ball 203. At the same time, the steel pipe body 1 and the docking steel pipe 101 are initially connected.

[0024] After the fixing bolt 206 is screwed in, the position of the mounting hole 303 of the fixing ring 3 on the main body of the steel pipe 1 corresponds one-to-one with the mounting hole 303 of the docking plate 301 on the docking steel pipe 101. The mounting bolt 302 is screwed in to fix the main body of the steel pipe 1 and the docking steel pipe 101 again. Welding is performed at the connection position. The triple fixation of the fixing bolt 206 for positioning, the mounting bolt 302 for fixing, and the welding connection improves the tightness of the connection between the two connected steel pipes.

[0025] Please see Figure 1-5 As shown, a corrosion-resistant welded steel pipe includes a fixing hole 205 located at the middle of the top of the movable limiting groove 207.

[0026] A fixing ring 3 is provided on the outer side of the end of the steel pipe body 1 near the connecting steel pipe 101. Multiple connecting plates 301 are provided at equal intervals on the outer side of the end of the connecting steel pipe 101 near the steel pipe body 1. The connecting plates 301 and the fixing ring 3 are provided with mounting holes 303. The mounting holes 303 penetrate the connecting plates 301 and the fixing ring 3. The mounting holes 303 are equipped with mounting bolts 302. The mounting bolts 302 are equipped with fixing nuts 304.

[0027] Based on the above embodiments, it should be noted that the outer side of the corrosion-resistant welded steel pipe is mainly exposed to atmospheric oxidation, ultraviolet rays, rainwater, acids, alkalis and salts in the soil, microorganisms, and mechanical impacts (such as soil friction when buried). Therefore, the 3PE / 3PP composite coating on the outer side of the steel pipe can resist soil corrosion, resist microorganisms, resist impact, and is suitable for high-temperature environments.

[0028] The inner side of this corrosion-resistant welded steel pipe will directly contact the transported liquids (water, acids, alkalis, oils) and gases (sulfur-containing gases, humid gases), requiring strong resistance to chemical corrosion and erosion. Furthermore, it must meet food-grade standards when hygiene requirements (such as for drinking water) are present. Therefore, the inner side of the steel pipe is coated with epoxy resin. This coating is resistant to acids and alkalis (non-oxidizing acids, alkalis, and salt solutions), has good water resistance, excellent adhesion, and food-grade epoxy can be used for drinking water pipelines (compliant with GB / T17219 standard).

[0029] In summary, the operating procedure of this device is as follows: When welding two corrosion-resistant steel pipes, insert the clamping plate 202 at one end of the steel pipe body 1 into the docking groove 201 at one end of the docking steel pipe 101. Before insertion, align the clamping ball 203 on the clamping plate 202 with the clamping groove 204 in the docking groove 201 so that the clamping plate 202 is inserted horizontally into the docking groove 201.

[0030] The ball 203 and the movable limiting groove 207 are both set in two groups. When the locking plate 202 is fully inserted into the docking groove 201, the position of the ball 203 is directly opposite the connection position between the movable limiting groove 207 and the locking groove 204. Rotate the steel pipe body 1 to make the ball 203 rotate into the movable limiting groove 207. Screw the fixing bolt 206 into the fixing hole 205 to limit the position of the ball 203. At the same time, the steel pipe body 1 and the docking steel pipe 101 are initially connected.

[0031] After the fixing bolt 206 is screwed in, the position of the mounting hole 303 of the fixing ring 3 on the main body of the steel pipe 1 corresponds one-to-one with the mounting hole 303 of the docking plate 301 on the docking steel pipe 101. The mounting bolt 302 is screwed in to fix the main body of the steel pipe 1 and the docking steel pipe 101 again. Welding is performed at the connection position. The triple fixation of the fixing bolt 206 for positioning, the mounting bolt 302 for fixing, and the welding connection improves the tightness of the connection between the two connected steel pipes.

Claims

1. A corrosion-resistant welded steel pipe, comprising a steel pipe body (1) and a butt-jointed steel pipe (101), characterized in that: A locking assembly (2) is provided between the main body of the steel pipe (1) and the connecting steel pipe (101). The locking assembly (2) includes a docking groove (201), a locking plate (202), a locking ball (203), a locking groove (204), a fixing hole (205), a fixing bolt (206), and a movable limiting groove (207). The connecting steel pipe (101) is provided with a docking groove (201) at one end near the main body of the steel pipe (1). Multiple locking grooves (204) are provided at equal intervals on the docking groove (201). The main body of the steel pipe (1) is provided with a locking plate (202) at one end near the connecting steel pipe (101). Multiple locking balls (203) are provided at equal intervals on the top of the locking plate (202). Fixing holes (205) are provided on the outside of the connecting steel pipe (101) and on the locking plate (202). Fixing bolts (206) are provided in the fixing holes (205). A movable limiting groove (207) is provided at the top of the inside of the docking groove (201).

2. The corrosion-resistant welded steel pipe according to claim 1, characterized in that: Both the docking groove (201) and the card plate (202) are arranged in a ring shape.

3. The corrosion-resistant welded steel pipe according to claim 1, characterized in that: The position of the slot (204) corresponds to the position of the ball (203), and the width of the slot (204) is the same as the diameter of the ball (203).

4. The corrosion-resistant welded steel pipe according to claim 3, characterized in that: The width and height of the movable limiting groove (207) are the same as the width and height of the slot (204), and the movable limiting groove (207) and the slot (204) are arranged in a "T" shape.

5. The corrosion-resistant welded steel pipe according to claim 1, characterized in that: The fixed hole (205) is located at the middle of the top of the movable limiting groove (207).

6. The corrosion-resistant welded steel pipe according to claim 5, characterized in that: The steel pipe body (1) has a fixing ring (3) on the outer side of one end near the docking steel pipe (101). The docking steel pipe (101) has multiple docking plates (301) equidistantly arranged on the outer side of one end near the steel pipe body (1). The docking plates (301) and the fixing ring (3) have mounting holes (303). The mounting holes (303) penetrate the docking plates (301) and the fixing ring (3). The mounting holes (303) are equipped with mounting bolts (302). The mounting bolts (302) are equipped with fixing nuts (304).

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