A buried steel pipe connecting structure

Abstract

This utility model provides a buried steel pipe connection structure, including a groove formed at the connection end of the steel pipe and a clamp assembly. The groove is an annular groove, and the clamp assembly includes two clamp halves that can form a cylindrical structure. The two clamp halves are detachably connected, and the inner sides of the two clamp halves are provided with positioning seals that cooperate with the groove and restrict its position. The inner side of the clamp halves is provided with filling grooves corresponding to the connection positions of the two steel pipes, and the filling grooves are provided with flexible sealing layers. This utility model has the advantages of fast installation, low cost, and convenient construction.

Description

Technical Field

[0001] This utility model relates to the field of steel pipe connection technology, and in particular to a buried steel pipe connection structure. Background Technology

[0002] Most existing steel pipes are connected by welding or flanges. Traditional welding connection will damage the anti-corrosion coating on the inner and outer walls of the steel pipe. The outer anti-corrosion coating can be repaired by measures, but the inner anti-corrosion coating is difficult to repair, which affects the service life of the steel pipe and the welding quality is unstable. Flange connection is complicated to install, has high cost, is difficult to maintain, and has poor sealing performance. It is only suitable for small diameter, low pressure pipelines. Utility Model Content

[0003] In view of the shortcomings of the existing technology, this utility model provides a buried steel pipe connection method that avoids damage to the anti-corrosion coating through a simplified mechanical connection method.

[0004] According to an embodiment of the present invention, a buried steel pipe connection structure includes a groove formed at the end of the steel pipe connection and a clamp assembly. The groove is an annular groove, and the clamp assembly includes two clamp halves that can form a cylindrical structure. The two clamp halves are detachably connected. The inner side of the two clamp halves is provided with a positioning seal that cooperates with the groove and is used to limit its position. The inner side of the clamp halves is provided with a filling groove corresponding to the connection position of the two steel pipes, and a flexible sealing layer is provided in the filling groove.

[0005] Preferably, the positioning seal includes a positioning strip disposed inside the hoop body and extending into the groove, and an elastic sealing ring disposed in the groove.

[0006] More preferably, the elastic sealing ring is disposed on the side of the positioning strip near the steel pipe connection end, and the side of the positioning strip near the elastic sealing ring is provided with a compression bevel.

[0007] More preferably, the positioning seal further includes a compression ring movably disposed in the groove, the compression ring being located between the positioning strip and the elastic sealing ring, and the side of the compression ring near the positioning strip having a pressure-bearing inclined surface that cooperates with the compression inclined surface.

[0008] More preferably, the sidewall of the groove away from the steel pipe connection section is provided with a plurality of positioning grooves evenly distributed along its circumference, and the side of the positioning strip is provided with a positioning block that cooperates with the positioning groove.

[0009] More preferably, the two grooves are symmetrically arranged about the steel pipe connection end face.

[0010] In a further preferred embodiment, each of the hoop bodies has at least two sets of through holes located on both sides, and the through holes on the two hoop bodies correspond to each other and are detachably connected by bolts.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] This application features a two-part clamp body with a groove on the outer wall of the steel pipe. The inner side of the clamp body has a positioning seal that mates with the groove. The clamp body is detachably connected by bolts. This mechanical connection method will not damage the anti-corrosion layer of the steel pipe. The positioning seal, in conjunction with the groove, ensures the stability between the clamp assembly and the steel pipe. Furthermore, the combined effect of the flexible sealing layer and the positioning seal ensures good sealing performance of the connection structure. Attached Figure Description

[0013] Figure 1 This is a front view sectional view of a buried steel pipe connection structure according to the present invention.

[0014] Figure 2 This is a side sectional view of a buried steel pipe connection structure according to the present invention.

[0015] Figure 3 This utility model Figure 1 A magnified schematic diagram of part A in the middle.

[0016] In the above figures: 1. Groove; 2. Clamp assembly; 210. Clamp body; 211. Through hole; 212. Bolt; 220. Positioning seal; 221. Positioning strip; 222. Elastic sealing ring; 223. Extrusion slope; 224. Extrusion ring; 225. Pressure-bearing slope; 226. Positioning groove; 227. Positioning block; 230. Filling groove; 231. Flexible sealing layer. Detailed Implementation

[0017] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0018] This utility model provides an embodiment, such as Figure 1 , Figure 2 As shown, a buried steel pipe connection structure includes a groove 1 formed at the connection end of the steel pipe and a clamp assembly 2. The groove 1 is an annular groove and is set on the outer wall of the steel pipe. The clamp assembly 2 includes two clamp bodies 210 that can form a cylindrical structure. Each clamp body 210 has a semi-circular cross-section. The two clamp bodies 210 are detachably connected and are symmetrically arranged about the connection end of the steel pipe.

[0019] The inner sides of the two clamps 210 are provided with positioning seals 220 that cooperate with the grooves 1 and are used to limit their positions. There are two sets of positioning seals 220. The inner sides of the clamps 210 are provided with filling grooves 230 corresponding to the connection positions of the two steel pipes. The filling grooves 230 are provided with flexible sealing layers 231. The flexible sealing layers 231 are SR / GB flexible fillers. They are pre-applied in the filling grooves 230 before the clamp assembly 2 is installed and connected. After the clamp assembly 2 is installed, the flexible filler forms a flexible sealing layer 231 that seals the connection end of the steel pipe.

[0020] To improve the sealing effect and prevent the clamp assembly 2 from moving axially along the steel pipe, in a further embodiment, such as Figure 3 As shown, the positioning seal 220 includes a positioning strip 221 disposed inside the clamp 210 and extending into the groove 1, and an elastic sealing ring 222 disposed in the groove 1. The positioning strip 221 abuts against the side wall of the groove 1, restricting the position of the clamp assembly 2 and ensuring the stability of the steel pipe connection.

[0021] To improve the sealing effect of the elastic sealing ring 222, in a further embodiment, the elastic sealing ring 222 is disposed on the side of the positioning strip 221 near the steel pipe connection end. The side of the positioning strip 221 near the elastic sealing ring 222 is provided with a pressing bevel 223. When the positioning strip 221 enters the groove 1, the pressing bevel 223 presses the elastic sealing ring 222, so that the outer side of the elastic sealing ring 222 is in interference fit with the inner wall surface of the hoop 210, thereby improving the sealing effect.

[0022] To facilitate the compression of the elastic sealing ring 222, in a further embodiment, the positioning seal 220 further includes a compression ring 224 movably disposed in the groove 1. The compression ring 224 can move along the axial direction of the steel pipe. The compression ring 224 is located between the positioning strip 221 and the elastic sealing ring 222. The side of the compression ring 224 near the positioning strip 221 is provided with a pressure-receiving inclined surface 225 that cooperates with the compression inclined surface 223. The pressure-receiving inclined surface 225 is arranged parallel to the compression inclined surface 223.

[0023] When the extrusion inclined surface 223 engages with the pressure-receiving inclined surface 225, the extrusion ring 224 moves toward the elastic sealing ring 222 and engages with the sidewall of the groove 1 to extrude the elastic sealing ring 222, causing the outer side of the elastic sealing ring 222 to bulge outward and fit tightly against the inner side of the hoop 210.

[0024] In order to prevent relative rotation between the hoop 210 and the steel pipe, in a further embodiment, the side wall of the groove 1 away from the steel pipe connecting section is provided with a plurality of positioning grooves 226 evenly distributed along its circumference, and the side of the positioning strip 221 is provided with positioning blocks 227 that cooperate with the positioning grooves 226.

[0025] Specifically, in order to facilitate the quick installation of the clamp assembly 2, in a further embodiment, each clamp body 210 is provided with two sets of through holes 211 at its left and right ends. In this embodiment, each set is provided with two through holes 211 located on the upper and lower sides respectively. The through holes 211 on the two clamp bodies 210 correspond to each other and are detachably connected by bolts 212.

[0026] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A buried steel pipe joint structure characterized by comprising: The device includes a groove (1) formed at the end of the steel pipe connection and a clamp assembly (2). The groove (1) is an annular groove. The clamp assembly (2) includes two clamp bodies (210) that can form a cylindrical structure. The two clamp bodies (210) are detachably connected. The inner side of the two clamp bodies (210) is provided with a positioning seal (220) that cooperates with the groove (1) and is used to limit its position. The inner side of the clamp body (210) is provided with a filling groove (230) corresponding to the connection position of the two steel pipes. The filling groove (230) is provided with a flexible sealing layer (231).

2. A buried steel pipe joint structure according to claim 1, characterized by The positioning seal (220) includes a positioning strip (221) disposed inside the hoop (210) and extending into the groove (1), and an elastic sealing ring (222) disposed in the groove (1).

3. A buried steel pipe joint structure according to claim 2, wherein The elastic sealing ring (222) is disposed on the side of the positioning strip (221) near the steel pipe connection end, and the side of the positioning strip (221) near the elastic sealing ring (222) is provided with a pressing bevel (223).

4. The buried steel pipe joint structure according to claim 3, wherein The positioning seal (220) further includes a compression ring (224) movably disposed in the groove (1). The compression ring (224) is located between the positioning strip (221) and the elastic sealing ring (222). The side of the compression ring (224) near the positioning strip (221) is provided with a pressure-bearing inclined surface (225) that cooperates with the compression inclined surface (223).

5. A buried steel pipe joint structure according to claim 4, wherein The groove (1) has multiple positioning grooves (226) evenly distributed along its circumference on the side wall away from the steel pipe connection section, and the side of the positioning strip (221) has a positioning block (227) that cooperates with the positioning groove (226).

6. A buried steel pipe joint structure according to any one of claims 1 to 5, characterized by The two grooves (1) are symmetrically arranged about the steel pipe connection end face.

7. A buried steel pipe joint structure according to claim 6, wherein Each of the hoop bodies (210) has at least two sets of through holes (211) located on both sides respectively. The through holes (211) on the two hoop bodies (210) correspond to each other and are detachably connected by bolts (212).

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