Plastic-coated composite steel pipe connector

Abstract

The utility model relates to the field of pipeline connection, in particular to a plastic-coated composite steel pipe connector which comprises an insertion opening and a bellmouth, a shell is arranged on the outer circumference of the bellmouth, a connecting mechanism is arranged in the shell, and the connecting mechanism comprises a push block, a connecting rod and a fixing block. A track is arranged on the outer side of the shell, the push block is slidably arranged in the track, and the bottom end of the push block penetrates out of the track and extends into the shell; the connecting rod is rotationally arranged in the shell; a spring is arranged between the connecting rod and the shell; one end of the connecting rod is matched with the bottom end of the push block, and the other end of the connecting rod is rotationally provided with a slider; a through hole is formed in the socket, the bottom end of the fixing block penetrates through the through hole and then is matched with a fixing groove formed in the spigot, a sliding way is fixedly arranged at the top end of the fixing block, the sliding way is arranged in the axial direction of the socket, and the sliding block is arranged in the sliding way in a sliding mode. The problem that an anti-corrosion layer of a pipeline connector is prone to being damaged is effectively solved. The service life of the pipeline is prolonged, and installation is more convenient.

Description

Technical Field

[0001] The utility model relates to the field of pipeline connection, in particular to a plastic-coated composite steel pipe connector. Background Art

[0002] At present, with the government's concern for people's livelihood, the safety of pipeline transportation has received more and more attention. In recent years, the choice of pipelines has become increasingly inclined towards safety and ease of installation.

[0003] Plastic coated composite steel pipe is based on steel pipe, and a layer of anti-corrosion layer is welded on the inner surface of the steel pipe or on the inner and outer surfaces through spraying, rolling, dipping and suction processes. At present, the connection method of plastic coated composite steel pipe is generally welding, which will damage the anti-corrosion layer, causing rust and leakage at the joints, greatly reducing the service life of the pipeline.

[0004] At present, no technical solution that can solve the above technical problems has been found in the existing public technologies. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a plastic-coated composite steel pipe connector in view of the above shortcomings. Compared with the prior art, the connector can prevent damage to the anti-corrosion layer, increase the service life of the pipeline, and is easy to install.

[0006] In order to solve the above technical problems, the technical solution of the utility model is:

[0007] A plastic-coated composite steel pipe connector, comprising a socket and a bell, an outer shell being arranged on the outer circumference of the bell, a connecting mechanism being arranged inside the shell, the connecting mechanism comprising a push block, a connecting rod and a fixed block; a track being arranged on the outer side of the shell, the push block being slidably arranged inside the track, the bottom end of the push block passing through the track and extending into the interior of the shell; the connecting rod being rotatably arranged inside the shell, a spring being arranged between the connecting rod and the shell; one end of the connecting rod being matched with the bottom end of the push block, and a sliding block being rotatably arranged on the other end of the connecting rod; a through hole being arranged on the bell, the bottom end of the fixed block passing through the through hole and cooperating with a fixing groove arranged on the socket, a slide being fixedly arranged on the top end of the fixed block, the slide being arranged along the axial direction of the bell, and the sliding block being slidably arranged in the slide.

[0008] Furthermore, a locking device is arranged between the push block and the shell, and the locking device includes a compression spring, a shell and a steel ball; an external thread is arranged on the outer side of the shell, and an internal thread matching the external thread is arranged on one side of the push block; one side of the shell is arranged in an opening, and the steel ball is arranged at the opening of the shell, and the steel ball is connected to the shell through the compression spring; a limiting groove matching the steel ball is arranged in the track.

[0009] Furthermore, the connection mechanism is provided in multiple groups.

[0010] Furthermore, the bottom ends of adjacent pushing blocks in a plurality of groups of the connecting mechanisms are connected.

[0011] Furthermore, a limiting ring is arranged inside the socket, and the limiting ring cooperates with the end face of the socket.

[0012] Furthermore, a sealing ring is provided between the socket and the plug.

[0013] Furthermore, the bottom end of the push block is provided with an inclined surface.

[0014] Furthermore, the spring is a torsion spring.

[0015] The utility model adopts the above technical solution, and has the following advantages compared with the prior art:

[0016] The setting of the connecting mechanism makes the connection between plastic-coated composite steel pipes more convenient without damaging the anti-corrosion layer, thereby increasing the service life of the pipeline.

[0017] The setting of the locking device enables the push block to be fixed, and the push block can be fixed in a state of supporting the connecting rod, making the disassembly between the plastic-coated composite steel pipes more convenient.

[0018] The arrangement of multiple groups of connection mechanisms makes the plastic-coated composite steel pipe connector suitable for large-diameter plastic-coated composite steel pipes. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of a plastic-coated composite steel pipe connector of the utility model. Figure 1 ;

[0020] Figure 2 yes Figure 1 A is a schematic diagram of the enlarged structure of the middle part;

[0021] Figure 3 This is a schematic diagram of a plastic-coated composite steel pipe connector of the utility model. Figure 2 ;

[0022] Figure 4 yes Figure 3 A schematic diagram of the enlarged structure of B;

[0023] Figure 5 yes Figure 4 Schematic diagram of the enlarged structure of C in the middle;

[0024] Figure 6 It is a schematic diagram of a three-dimensional structure in which two groups of push blocks are connected;

[0025] In the figure:

[0026] 1. Socket; 101. Fixing groove; 2. Socket; 201. Through hole; 3. Shell; 301. Track; 302. Limiting groove; 4. Push block; 5. Connecting rod; 6. Fixing block; 7. Spring; 8. Slider; 9. Slideway; 10. Compression spring; 11. Shell; 12. Steel ball; 13. Limiting ring; 14. Sealing ring. DETAILED DESCRIPTION

[0027] Embodiment 1, as Figure 1-6 As shown, a plastic-coated composite steel pipe connector includes a socket 1 and a socket 2. A shell 3 is arranged on the outer circumference of the socket 2. A connecting mechanism is arranged inside the shell 3. The connecting mechanism includes a push block 4, a connecting rod 5 and a fixing block 6.

[0028] The outer shell 3 is fixedly arranged on the outer circumference of the socket 2. The outer shell 3 is divided into two parts. After the push block 4, the connecting rod 5 and the fixed block 6 and other components are installed, the two parts of the outer shell 3 are combined and welded with the socket 2, and then an anti-corrosion layer is added. In order to prevent the interior of the outer shell 3 from being corroded, the interior of the outer shell 3 and its internal components can be added with an anti-corrosion layer in advance, and a rubber sealing ring can also be arranged between the fixed block 6 and the through hole 201. A track 301 is arranged on the outside of the outer shell 3, and the push block 4 is slidably arranged in the track 301. The bottom end of the push block 4 passes through the track 301 and extends into the interior of the outer shell 3. Preferably, anti-slip grooves are arranged on the top of the push block 4. In order to enable the push block 4 to better push the connecting rod 5, an inclined surface is arranged at the bottom end of the push block 4.

[0029] The connecting rod 5 is rotatably arranged inside the housing 3 through a rotating shaft. Preferably, the distance between the rotating shaft and the push block 4 is closer than the distance between the rotating shaft and the fixed block 6. When the top of the connecting rod 5 is pushed to rotate a smaller angle, the bottom end of the connecting rod 5 will rotate a larger angle, thereby driving the fixed block 6 to move a larger distance in the radial direction of the socket 2. A spring 7 is arranged between the connecting rod 5 and the housing 3. Preferably, the spring 7 can be a torsion spring, which is sleeved on the rotating shaft of the connecting rod 5, one end of the torsion spring is connected to the connecting rod 5, and the other end of the torsion spring is connected to the housing 3. Of course, the spring 7 can also be a tension spring. One end of the connecting rod 5 is matched with the bottom end of the push block 4, and the other end of the connecting rod 5 is rotatably arranged with a slider 8. The socket 2 is provided with a through hole 201, and the bottom end of the fixed block 6 passes through the through hole 201 and then matches with the fixed groove 101 arranged on the socket 1. The top of the fixed block 6 is fixedly provided with a slideway 9, which is arranged along the axial direction of the socket 2, and the slider 8 is slidably arranged in the slideway 9.

[0030] When the plastic-coated composite steel pipe needs to be connected, push the push block 4, and continue to push the push block 4 after the bottom end of the push block 4 abuts against one end of the connecting rod 5. The connecting rod 5 rotates under the drive of the push block 4; the slider 8 at the bottom end of the connecting rod 5 slides along the slideway 9 and drives the fixed block 6 to move outward until the bottom end of the fixed block 6 moves into the through hole 201; insert the socket 1 into the socket 2, release the push block 4, and slowly push the socket 1. When the fixed block 6 and the fixed groove 101 are opposite, the connecting rod 5 is reset under the action of the spring 7, and the bottom end of the fixed block 6 is inserted into the fixed groove 101. When the plastic-coated composite steel pipe needs to be disassembled, push the push block 4 until the bottom end of the fixed block 6 moves into the through hole 201. Figure 4 As shown, the fixing effect of the fixing block 6 on the socket 1 is released, and the socket 1 is pulled out. Therefore, the connection between the plastic-coated composite steel pipes is more convenient, and the anti-corrosion layer will not be damaged, thereby increasing the service life of the pipeline.

[0031] In order to make it easier for the fixing block 6 and the fixing groove 101 to reach a relative state, a limit ring 13 is arranged inside the socket 2, and the limit ring 13 cooperates with the end face of the socket 1. When the end face of the socket 1 contacts the limit ring 13, the fixing block 6 is opposite to the fixing groove 101.

[0032] In order to better fix the position of the push block 4 in the track 301, a locking device is provided between the push block 4 and the housing 3, and the locking device includes a compression spring 10, a shell 11 and a steel ball 12. An external thread is provided on the outer side of the shell 11, and an internal thread matching the external thread is provided on one side of the push block 4. One side of the shell 11 is open, and the steel ball 12 is provided at the opening of the shell 11. The steel ball 12 is connected to the shell 11 through the compression spring 10. A limiting groove 302 matching the steel ball 12 is provided in the track 301. Figure 4 and 5 As shown, when the push block 4 moves until the bottom end of the fixed block 6 is located inside the through hole 201, the limit groove 302 is opposite to the steel ball 12, and the steel ball 12 enters the limit groove 302 under the action of the compression spring 10, thereby fixing the push block 4. The staff can first fix the push block 4, then insert the socket 1 into the socket 2, and then push the push block 4 in the opposite direction to release the locking device from fixing the push block 4.

[0033] In order to better connect the plastic coated composite steel pipe, the connecting mechanism is provided with multiple groups, such as Figure 1 As shown, the connection mechanism is provided with two groups. The bottom ends of the adjacent push blocks 4 in the multiple groups of connection mechanisms are connected to better push the connecting rod 5, such as Figure 6 As shown, the bottom ends of the two groups of push blocks 4 are connected to form a ring.

[0034] In order to improve the sealing performance of the connection between the plastic-coated composite steel pipes, a sealing ring 14 is provided between the socket 2 and the plug 1. Multiple sealing rings 14 may be provided, such as two.

[0035] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A plastic-coated composite steel pipe connector, comprising a spigot (1) and a socket (2), characterized in that: An outer shell (3) is provided on the outer circumference of the socket (2), and a connecting mechanism is provided inside the outer shell (3), wherein the connecting mechanism comprises a push block (4), a connecting rod (5) and a fixing block (6); A track (301) is arranged on the outer side of the shell (3), the push block (4) is slidably arranged in the track (301), and the bottom end of the push block (4) passes through the track (301) and extends into the interior of the shell (3); The connecting rod (5) is rotatably arranged inside the housing (3), and a spring (7) is arranged between the connecting rod (5) and the housing (3); one end of the connecting rod (5) cooperates with the bottom end of the push block (4), and the other end of the connecting rod (5) is rotatably arranged with a sliding block (8); a through hole (201) is arranged on the socket (2), and the bottom end of the fixing block (6) passes through the through hole (201) and cooperates with a fixing groove (101) arranged on the socket (1), and a slideway (9) is fixedly arranged on the top end of the fixing block (6), and the slideway (9) is arranged along the axial direction of the socket (2), and the sliding block (8) is slidably arranged in the slideway (9).

2. The plastic-coated composite steel pipe connector according to claim 1, characterized in that: A locking device is provided between the push block (4) and the housing (3), the locking device comprising a compression spring (10), a housing (11) and a steel ball (12); The outer side of the shell (11) is provided with an external thread, and one side of the push block (4) is provided with an internal thread that matches the external thread; one side of the shell (11) is provided with an opening, and the steel ball (12) is provided at the opening of the shell (11), and the steel ball (12) is connected to the shell (11) via the compression spring (10); and a limiting groove (302) that matches the steel ball (12) is provided in the track (301).

3. The plastic-coated composite steel pipe connector according to claim 2, characterized in that: The connecting mechanism is provided in multiple groups.

4. The plastic-coated composite steel pipe connector according to claim 3, characterized in that: The bottom ends of adjacent push blocks (4) in a plurality of groups of the connection mechanisms are connected.

5. A plastic-coated composite steel pipe connector according to any one of claims 1 to 4, characterized in that: A limit ring (13) is provided inside the socket (2), and the limit ring (13) matches the end surface of the socket (1).

6. A plastic-coated composite steel pipe connector according to any one of claims 1 to 4, characterized in that: A sealing ring (14) is provided between the socket (2) and the plug (1).

7. A plastic-coated composite steel pipe connector according to any one of claims 1 to 4, characterized in that: The bottom end of the push block (4) is provided with an inclined surface.

8. A plastic-coated composite steel pipe connector according to any one of claims 1 to 4, characterized in that: The spring (7) is a torsion spring.

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