Steel pipe lined with HDPE (high-density polyethylene) pipe

Abstract

The utility model discloses a steel pipe lining HDPE (High-Density Polyethylene) pipe, which belongs to the technical field of pipelines and comprises a lining pipe main body, an annular groove is arranged at the end part of the lining pipe main body, and a positioning groove is arranged at the end part of the lining pipe main body. The annular groove and the positioning groove are formed in the lining pipe main body, the connecting cylinder and the abutting spring are arranged in the positioning groove, and the end sealing assemblies are arranged at the ends of the lining pipe main body, so that after the steel pipe main body is spliced, the abutting spring is used for abutting the adjacent end sealing assemblies together, and the connection sealing performance is ensured; the sealing performance of follow-up material conveying is guaranteed, the situation of connection gaps or excessive connection is avoided, good sealing performance of the end sealing assemblies and the lining pipe body can be guaranteed through the arrangement of the rubber sealing sleeves and the rubber rings, the using effect is guaranteed, the rubber rings are arranged in the annular grooves, the sealing effect is further improved, and the service life of the lining pipe is prolonged. The positioning grooves, the connecting cylinders, the abutting springs and other structures are distributed in an annular array mode, and even acting force can be applied.

Description

TECHNICAL FIELD

[0001] The utility model relates to pipeline technical field, especially a kind of steel pipe lining HDPE pipe. BACKGROUND

[0002] Steel pipe in use process, single steel pipe although have good mechanical strength, but it is easy to appear rust in corrosive environment, long time use is easy to damage, to improve the corrosion resistance of steel pipe when using, usually set up lining HDPE pipe in steel pipe interior, utilize the corrosion resistance and wear resistance of HDPE pipe to increase the overall performance of steel pipe when using, can long time use.

[0003] In existing steel pipe lining HDPE pipe, lining HDPE pipe is fixedly arranged in the interior of steel pipe, when adjacent steel pipes are spliced, lining HDPE pipes are butt-jointed for use. However, for the existing lining HDPE pipe, there is no abutting portion between the lining HDPE pipes of adjacent steel pipes, and the lining HDPE pipes are only fixed by connecting the end portions of the steel pipes. If the length of the lining HDPE pipe is insufficient, the lining HDPE pipes cannot be connected, and leakage is likely to occur after connection. The connection sealing property is general. If the length of the lining HDPE pipe is excessive, the lining HDPE pipe is likely to be damaged due to excessive extrusion force after connection, thereby affecting the use effect. SUMMARY

[0004] The main purpose of the utility model is to provide a steel pipe lining HDPE pipe, which can effectively solve the problems in the background art.

[0005] To achieve the above-mentioned purpose, the utility model adopts the technical scheme that:

[0006] A steel pipe lining HDPE pipe, comprising a lining pipe main body, an annular groove is formed at the end portion of the lining pipe main body, and a positioning groove is arranged at the end portion of the lining pipe main body, a connecting cylinder is arranged in the positioning groove of the lining pipe main body, a pressing spring is arranged on the connecting cylinder, and an end portion sealing assembly is connected to the end portion of the lining pipe main body.

[0007] Preferably, the positioning grooves are arranged in an annular array on the lining pipe main body, the connecting cylinder is fixed in the positioning groove on the lining pipe main body, and the end portion of the pressing spring is sleeved on the connecting cylinder.

[0008] Preferably, the end portion sealing assembly comprises an annular sealing plate, an abutting plate, a positioning plug, a rubber sealing sleeve and a rubber ring, the annular sealing plate and the abutting plate are fixedly connected, the annular sealing plate is arranged in the interior of the lining pipe main body, the positioning plug is fixedly arranged on the abutting plate, the rubber sealing sleeve and the rubber ring are fixedly connected, and the rubber sealing sleeve is arranged on the annular sealing plate.

[0009] Preferably, the positioning rods are arranged in a ring array on the abutting plate, and the ends of the positioning rods are inserted into the positioning grooves on the inner liner pipe body, the ends of the positioning rods are in contact with the abutting springs, and the rubber ring is arranged in the annular groove on the inner liner pipe body.

[0010] Preferably, the outer surface of the inner liner pipe body is provided with a steel pipe body, and the end of the steel pipe body is fixed with an end connecting flange, and the end connecting flange is provided with connecting holes arranged in a ring array.

[0011] Compared with the prior art, the steel pipe lined HDPE pipe has the following beneficial effects: the annular groove and the positioning groove are arranged on the inner liner pipe body, the connecting cylinder and the abutting spring are arranged in the positioning groove, the end sealing assembly is arranged at the end of the inner liner pipe body, the abutting spring can abut the adjacent end sealing assemblies together after the steel pipe body is spliced, the connection sealing property is ensured, the sealing property of subsequent material conveying is ensured, the connection gap or over-connection condition is avoided, the rubber sealing sleeve and the rubber ring are arranged, the end sealing assembly and the inner liner pipe body can be well sealed, the use effect is ensured, the rubber ring is arranged in the annular groove, the sealing effect is further improved, the positioning groove, the connecting cylinder and the abutting spring are arranged in a ring array, uniform force can be applied, and the connection sealing effect is improved. BRIEF DESCRIPTION OF DRAWINGS

[0012] Fig. 1 It is a schematic view of the overall structure of the utility model;

[0013] Fig. 2 It is a schematic view of the structure of the inner liner pipe body of the utility model;

[0014] Fig. 3 It is a schematic view of the structure of the end sealing assembly of the utility model.

[0015] In the drawing: 1, inner liner pipe body; 2, annular groove; 3, positioning groove; 4, connecting cylinder; 5, abutting spring; 6, end sealing assembly; 601, annular sealing plate; 602, abutting plate; 603, positioning rod; 604, rubber sealing sleeve; 605, rubber ring; 7, steel pipe body; 8, end connecting flange; 9, connecting hole. DETAILED DESCRIPTION

[0016] In order to make the technical means, creative features, purposes and effects of the utility model easy to understand, the utility model is further described in combination with specific embodiments.

[0017] For example, Figs. 1-3As shown, a steel pipe lining HDPE pipe, including the lining pipe body 1, the end position of the lining pipe body 1 is provided with an annular groove 2, and the end of the lining pipe body 1 is provided with a positioning groove 3, the positioning groove 3 on the lining pipe body 1 is provided with a connecting cylinder 4, and the connecting cylinder 4 is provided with a abutting spring 5, and the end of the lining pipe body 1 is connected with an end sealing assembly 6. The positioning groove 3 is arranged in an annular array on the lining pipe body 1, the connecting cylinder 4 is fixed in the positioning groove 3 on the lining pipe body 1, and the end of the abutting spring 5 is sleeved on the connecting cylinder 4.

[0018] The outer surface of the lining pipe body 1 is provided with a steel pipe body 7, and the end of the steel pipe body 7 is fixed with an end connecting flange 8, and the end connecting flange 8 is provided with a connecting hole 9, and the connecting hole 9 is arranged in an annular array on the end connecting flange 8.

[0019] When connecting the steel pipe and the lining pipe, the lining pipe body 1 is arranged inside the steel pipe body 7, the lining pipe body 1 and the steel pipe body 7 are fixed together by means of adhesion, then the abutting spring 5 is arranged in the positioning groove 3 at the end of the lining pipe body 1, so that the end of the abutting spring 5 is sleeved on the connecting cylinder 4 inside the positioning groove 3, and then the end sealing assembly 6 is arranged at both ends of the lining pipe body 1, so that the parts in the end sealing assembly 6 are in contact with the abutting spring 5, and part of the end sealing assembly 6 is located in the annular groove 2 on the lining pipe body 1.

[0020] After the assembly is completed, the pipeline is laid and used, when the adjacent steel pipes are spliced, the end connecting flanges 8 at the ends of the steel pipe bodies 7 are contacted together, the connecting holes 9 are accurately aligned, and the end sealing assemblies 6 at the ends of the adjacent lining pipe bodies 1 are also contacted together, the bolts are passed through the connecting holes 9, the nuts are arranged at the ends of the bolts, so that the adjacent end connecting flanges 8 are fixed together, the adjacent steel pipes are fixed and connected, at this time, the end sealing assemblies 6 at the ends of the adjacent lining pipe bodies 1 are also moved and compressed to abut the spring 5, under the action of the abutting spring 5, the end sealing assemblies 6 can be displaced and contacted together, which ensures the normal connection of the steel pipes and the sealing property.

[0021] When the steel pipe is laid and used, the materials flow in the lining pipe body 1, the lining pipe body 1 cooperates with the end sealing assembly 6 to provide wear resistance and corrosion resistance, and the steel pipe body 7 provides mechanical strength to ensure long-term use of the pipeline.

[0022] By the above-mentioned embodiment, the end sealing assembly 6 comprises an annular sealing plate 601, an abutting plate 602, a positioning plug 603, a rubber sealing sleeve 604 and a rubber ring 605, the annular sealing plate 601 and the abutting plate 602 are fixedly connected, the annular sealing plate 601 is arranged inside the inner liner pipe body 1, the positioning plug 603 is fixed on the abutting plate 602, the rubber sealing sleeve 604 and the rubber ring 605 are fixedly connected, and the rubber sealing sleeve 604 is arranged on the annular sealing plate 601.

[0023] The positioning plugs 603 are arranged in an annular array on the abutting plate 602, the ends of the positioning plugs 603 are inserted into the positioning grooves 3 on the inner liner pipe body 1, the ends of the positioning plugs 603 are in contact with the abutting springs 5, and the rubber ring 605 is arranged in the annular groove 2 on the inner liner pipe body 1.

[0024] When the end sealing assembly 6 is installed, the rubber sealing sleeve 604 and the rubber ring 605 are compressed, the rubber sealing sleeve 604 and the rubber ring 605 are arranged inside the inner liner pipe body 1, so that the rubber ring 605 is located in the annular groove 2, and part of the annular sealing plate 601 is located inside the inner liner pipe body 1, and the ends of the positioning plugs 603 are located in the positioning grooves 3 and are in contact with the abutting springs 5. When the pipelines are connected, the end sealing assemblies 6 on the adjacent inner liner pipe bodies 1 are in contact, the abutting plates 602 on the annular sealing plates 601 are in contact, and as the connection is fixed, the abutting plates 602 move with the annular sealing plates 601 inside the inner liner pipe body 1, the rubber sealing sleeve 604 and the rubber ring 605 move together, and the positioning plugs 603 move to compress the abutting springs 5. When the pipeline connection is completed, under the action of the abutting springs 5, the positioning plugs 603 apply force to the abutting plates 602, so as to ensure that the adjacent abutting plates 602 are tightly attached, and at the same time, the annular sealing plates 601 are attached to the inner wall of the inner liner pipe body 1, and the rubber sealing sleeve 604 and the rubber ring 605 are used in cooperation, so as to ensure that the adjacent inner liner pipe bodies 1 have good connection sealing performance, and the subsequent use effect is ensured.

[0025] It should be noted that by arranging the annular groove 2 and the positioning groove 3 on the inner liner pipe body 1, arranging the connecting cylinder 4 and the abutting spring 5 in the positioning groove 3, and arranging the end sealing assembly 6 at the end of the inner liner pipe body 1, the adjacent end sealing assemblies 6 can be connected together by the abutting spring 5 after the steel pipe body 7 is spliced, so as to ensure the connection sealing performance, ensure the sealing performance of subsequent material conveying, avoid the occurrence of connection gaps or excessive connection, the arrangement of the rubber sealing sleeve 604 and the rubber ring 605 can ensure the good sealing performance of the end sealing assembly 6 and the inner liner pipe body 1, and the use effect is ensured, the rubber ring 605 is arranged in the annular groove 2, which further increases the sealing effect, and the positioning groove 3, the connecting cylinder 4 and the abutting spring 5 are arranged in an annular array, so as to apply uniform force and increase the connection sealing effect.

[0026] The above describes the use principle, features and beneficial effects of the present application. Those skilled in the art can understand from the above that the above is not limited to the present application. The above embodiments and description of the specification describe the basic principles and features of the present application. Under the premise of meeting the concept of the present application, various changes and improvements can be made to the present application, and these improvements should fall within the scope of the present application.

Claims

1. A steel pipe lined with HDPE, characterized in that: The device includes an inner liner tube body (1), an annular groove (2) is provided at the end of the inner liner tube body (1), and a positioning groove (3) is provided at the end of the inner liner tube body (1). A connecting cylinder (4) is provided in the positioning groove (3) on the inner liner tube body (1), and a clamping spring (5) is provided on the connecting cylinder (4). An end sealing assembly (6) is connected to the end of the inner liner tube body (1).

2. The HDPE-lined steel pipe according to claim 1, characterized in that: The positioning grooves (3) are arranged in a ring array on the inner liner tube body (1), the connecting cylinder (4) is fixed in the positioning grooves (3) on the inner liner tube body (1), and the end of the clamping spring (5) is sleeved on the connecting cylinder (4).

3. The HDPE-lined steel pipe according to claim 2, characterized in that: The end sealing assembly (6) includes an annular sealing plate (601), an abutment plate (602), a positioning rod (603), a rubber sealing sleeve (604), and a rubber ring (605). The annular sealing plate (601) and the abutment plate (602) are fixedly connected, and the annular sealing plate (601) is disposed inside the inner liner tube body (1). The positioning rod (603) is fixed on the abutment plate (602). The rubber sealing sleeve (604) and the rubber ring (605) are fixedly connected, and the rubber sealing sleeve (604) is disposed on the annular sealing plate (601).

4. A steel pipe lined with HDPE according to claim 3, characterized in that: The positioning rods (603) are arranged in a ring array on the abutment plate (602), and the ends of the positioning rods (603) are inserted into the positioning grooves (3) on the inner liner tube body (1). The ends of the positioning rods (603) are in contact with the clamping spring (5), and the rubber ring (605) is set in the annular groove (2) on the inner liner tube body (1).

5. A steel pipe lined with HDPE according to claim 4, characterized in that: The outer surface of the inner liner tube body (1) is provided with a steel pipe body (7), and the end of the steel pipe body (7) is fixed with an end connecting flange (8). The end connecting flange (8) is provided with connecting holes (9), and the connecting holes (9) are distributed in a ring array on the end connecting flange (8).

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