Pipeline cathode protection test fixing test piece assembly and test pile thereof

Abstract

The utility model belongs to the technical field of cathode protection test, and discloses a pipeline cathode protection test fixed test piece assembly and a test pile thereof, which are arranged in a cathode protection test pile of a buried pipeline to keep a polarization state for direct detection. Comprising a test piece part and a cable, the test piece part comprises a shell and a connector at one end of the shell, the cable is connected with a test piece arranged in the shell through the connector, and the other end of the cable is connected to a standby binding post of a test pile; one end of the switch module is connected to the standby binding post of the test pile, and the other end of the switch module is connected to the zero binding post of the test pile.

Description

Technical Field

[0001] The utility model belongs to the technical field of cathode protection testing, and in particular relates to a pipeline cathode protection testing fixed test piece component and a test pile thereof. Background Art

[0002] Cathodic protection test piles are essential devices in the cathodic protection system of long-distance pipelines. They are mainly used for the detection of pipeline kilometer indication, cathodic protection effect and operating parameters. The test piles are designed as multifunctional test piles for the detection of cathodic protection parameters and are generally arranged along the line according to the test function. The test piles are used for the detection of pipeline potential, current and insulation performance. The test piles are generally equipped with 6-8 terminals, which can be conveniently composed of potential, current, sacrificial anode, insulation performance test piles or cross-pipeline test piles according to the specific requirements of the design unit.

[0003] Steel buried pipelines are generally protected by a combination of anti-corrosion layer and cathodic protection. The anti-corrosion layer is the first layer of fortress, and its good insulation, impermeability and mechanical properties are used to achieve the purpose of anti-corrosion. The cathodic protection system is the second line of defense. When the anti-corrosion layer is damaged or there are micropores, the cathodic polarization of the pipeline can be applied through the protection current to slow down or eliminate the corrosion of the pipe wall. According to GB / T21448-2017 "Technical Specifications for Cathodic Protection of Buried Steel Pipelines", the evaluation of the cathodic protection effect of pipelines should adopt the power-off potential index. The field test generally uses the GPS synchronous interruption method, but it is not suitable for the cathodic protection current in the pipe that cannot be synchronously interrupted, and the pipe section disturbed by stray current. The cathodic protection potential detection test piece can solve this problem. By simulating the leakage point of the pipeline anti-corrosion layer, the instantaneous disconnection potential of the test piece is used to achieve the measurement of the approximate pipeline power-off potential. The cathodic protection potential test piece is used to simulate the potential of the investigated pipeline after cathodic polarization. It is buried at the test point of the pipeline. Part of the test piece is exposed, and the other part has an anti-corrosion layer. The design state and material of the test piece are similar to those of the pipeline. It is connected to the pipeline through a cable, so that the exposed part of the test piece simulates an anti-corrosion layer leakage point of the same area and shape as the pipeline. When the pipeline is in the cathodic protection state, the pipeline is polarized by the protection current synchronously, and the test piece will also be polarized to a degree similar to the pipeline. It only needs to measure the instantaneous disconnection potential of the test piece to represent the power-off potential of the pipeline measurement point.

[0004] However, when conducting power-off potential detection on cathodic protection, it is generally necessary to carry a "temporary" test piece to be polarized near the test point. The test piece can only be tested after it has been polarized to the natural potential. The existing defects are: the polarization time of the test piece is relatively long, resulting in a longer test time for a single test pile, which affects the detection efficiency. Utility Model Content

[0005] In order to solve the problems existing in the prior art, the utility model provides a pipeline cathodic protection test fixed test piece assembly and a test pile thereof, which mainly avoids the need to connect the test piece terminal for polarization treatment every time a test is performed through the structural design of the fixed test piece, thereby saving time and improving detection efficiency.

[0006] The technical solution adopted by the utility model is:

[0007] In a first aspect, the utility model provides a pipeline cathodic protection test fixed test piece assembly, which is used to be arranged in a cathodic protection test pile of an underground pipeline to maintain a polarization state for direct detection; it comprises a test piece part and a cable, the test piece part comprises a shell and a connector at one end of the shell, the cable is connected to the test piece arranged in the shell through the connector, and the other end of the cable is connected to a spare terminal of the test pile;

[0008] It also includes a switch module, one end of which is connected to the spare terminal of the test pile, and the other end of which is connected to the zero-position terminal of the test pile.

[0009] In combination with the first aspect, the utility model provides a first implementation of the first aspect, wherein the test piece is installed outside the test pile and in the soil 25-35 cm away from the position where the test pile contacts the soil, and one end of the cable penetrates into the test pile and is connected to a spare terminal.

[0010] In combination with the first aspect, the utility model provides a second implementation of the first aspect, wherein the switch module comprises an insulating plate and a switch assembly, wherein the switch assembly is arranged in the middle of the insulating plate, and two through holes for passing the spare terminal and the zero terminal are symmetrically arranged on both sides of the insulating plate;

[0011] The switch assembly comprises two connecting heads, which are respectively connected to the spare connecting post and the zero-position connecting post on the corresponding side and are connected / disconnected by the switch assembly.

[0012] In combination with the second implementation of the first aspect, the utility model provides a third implementation of the first aspect, wherein the switch assembly is a lever switch.

[0013] In a second aspect, the utility model further provides a test pile, provided with any one of the above pipeline cathodic protection test fixed test piece assemblies, specifically comprising:

[0014] The pile body is a hollow columnar structure with a circuit board for detection inside; and

[0015] The base is arranged at one end of the pile body, buried in the soil and fixed in place by bolts or rivets.

[0016] In combination with the second aspect, the utility model provides a first implementation manner of the second aspect, wherein a through hole is provided on the pile body close to the base, and the cable passes through the through hole.

[0017] In combination with the second aspect, the utility model provides a second implementation of the second aspect, wherein an inspection port is provided on the surface of the pile body above the soil, the circuit board is arranged in the inspection port, a plurality of wiring terminals are provided on the circuit board, and the cable extends from the inside of the pile body to the circuit board and is connected to the wiring terminal serving as a spare wiring post.

[0018] In combination with the second embodiment of the second aspect, the utility model provides a third embodiment of the second aspect, wherein the wiring terminals include five groups serving as test strip wiring terminals, reference wiring terminals, zero position wiring terminals, anode bed wiring terminals and spare wiring terminals, each group of wiring terminals is provided with a conductive plate connection, the two groups of wiring terminals serving as zero position wiring terminals and spare wiring terminals are arranged adjacent to each other, and the switch module is arranged between the two groups of wiring terminals serving as zero position wiring terminals and spare wiring terminals.

[0019] The beneficial effects of the utility model are:

[0020] (1) The utility model provides a fixed test piece assembly and a test pile structure provided with the assembly, which can achieve the effect of fixing the test piece to maintain the polarization state on the basis of an existing test pile or a newly built test pile, thereby avoiding the need to wait for the test piece to be polarized before testing each time, thereby greatly shortening the detection time;

[0021] (2) The switch module provided in the present invention can be directly fixed by utilizing the structural design of the wiring terminal, and at the same time, a conductive connection is achieved through a wiring head connected by a flexible wiring harness, and a quick disconnect terminal test of the test piece is achieved through a switch assembly provided in the middle. At the same time, the provision of such a switch assembly can also facilitate the restoration of the connection of the test piece immediately after the test result is obtained, thereby avoiding the loss of the polarization effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a side view of a test pile in an embodiment of the utility model;

[0023] Figure 2 is a front view of a test pile in an embodiment of the utility model;

[0024] Figure 3 This utility model Figure 2 A is a local enlarged schematic diagram;

[0025] Figure 4 It is an axonometric diagram of a test pile in an embodiment of the utility model;

[0026] Figure 5 This utility model Figure 4B is a partial enlarged schematic diagram.

[0027] In the figure: 1-pile body, 2-inspection port, 3-cable, 4-test piece part, 5-circuit board, 6-wiring terminal, 7-switch module, 8-conductive plate. DETAILED DESCRIPTION

[0028] The present invention will be further explained below in conjunction with the accompanying drawings and specific embodiments.

[0029] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0030] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0031] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0032] In the description of this application, it should be noted that if the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the product of the application is usually placed when in use. It is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on this application. In addition, if the terms "first", "second", etc. appear in the description of this application, they are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0033] In addition, if the terms "horizontal" or "vertical" appear in the description of this application, it does not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0034] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0035] Embodiment 1:

[0036] The present embodiment provides a pipeline cathodic protection test fixed test piece assembly, which is arranged in an existing test pile with a wiring terminal 6, and the polarization state of the test piece is maintained by connecting a spare wiring post, so that the inspection personnel can perform rapid testing through a portable copper / copper sulfate reference and a multimeter.

[0037] The component is fixed in the cathodic protection test pile of the buried pipeline to maintain the polarization state for direct detection. Specifically, the component includes a test piece 4 and a cable 3. The test piece 4 is composed of a shell and a connector at one end of the shell. The cable 3 is connected to the test piece in the shell through the connector, and the other end of the cable 3 is connected to the spare terminal of the test pile. In addition, the component also includes a switch module 7, one end of which is connected to the spare terminal of the test pile, and the other end is connected to the zero terminal of the test pile.

[0038] The test piece 4 is an independent structure, and its main body is installed outside the test pile and located in the soil near the contact position between the test pile and the soil. The distance between the test pile and the soil is within the range of 25-35 cm, and is generally set to a spacing of 30 cm.

[0039] The cable 3 is used as a structure for connecting the test piece 4, and one end of the cable 3 passes through the test pile and is connected to the spare terminal. This arrangement ensures that the test piece 4 can effectively simulate the cathodic protection state of the pipeline, and the fixed position facilitates direct detection.

[0040] Specifically, the switch module 7 is composed of an insulating plate and a switch assembly. The switch assembly is located in the middle of the insulating plate, and through holes are provided on both sides of the insulating plate for the spare terminal and the zero terminal to pass through. The switch assembly includes two terminals, which are respectively connected to the spare terminal and the zero terminal, and the connection or disconnection of the circuit is controlled by the switch assembly. This design allows the tester to conveniently control the polarization state of the test piece to perform accurate potential measurement.

[0041] Among them, the switch assembly adopts a lever switch, which provides reliable mechanical action and stable electrical connection. The lever switch is easy to operate, which is convenient for on-site staff to quickly test in harsh environments. As other implementations, a variety of different types of two-stage switch structures can be selected, including two-stage pressure-release switches, knob switches, rocker switches, etc. Since it is set in the middle of the insulating plate, the terminals 6 on both sides are connected through the wires and the wiring heads at the ends of the wires, and the size range that can be installed is relatively large.

[0042] Reference Figure 1-Figure 5 The utility model also provides a test pile, which has any of the above pipeline cathodic protection test fixed test pieces built in. The test pile includes a pile body 1 and a base. The pile body 1 is a hollow columnar structure, and a circuit board 5 for detection is installed inside. The base is located at one end of the pile body 1, buried in the soil, and fixed by bolts or rivets to achieve limit position.

[0043] A through hole is provided at the upper part of the pile body 1 near the base, through which the cable 3 passes, thereby ensuring the protection and neatness of the cable 3. This design helps to reduce the wear of the cable 3 and prolong its service life.

[0044] An inspection port 2 is provided on the surface of the pile body 1 to facilitate access to the circuit board 5 inside. The circuit board 5 is located in the inspection port 2, and a number of wiring terminals 6 are provided on the board. The cable 3 extends from the inside of the pile body 1 to the circuit board 5 and is connected to the wiring terminals 6 of the spare wiring posts. This structure makes the maintenance and replacement of the circuit board 5 more convenient. The figure only shows that the inspection port 2 is exposed. In actual setting and use, a cover plate is provided at the inspection port 2 for sealing, which is generally a rotatably connected cover plate and locked by a lock.

[0045] Further, the figure shows only four groups of terminals 6. The terminals 6 in this embodiment include five groups of test strip terminals, reference terminals, zero terminals, anode bed terminals and spare terminals. Each group of terminals 6 is connected with a conductive plate 8. The zero terminals and spare terminals are arranged adjacent to each other, and the switch module 7 is located between them, so as to realize a compact circuit layout and efficient electrical connection.

[0046] The utility model is not limited to the above optional implementation modes, and anyone can derive other various forms of products under the enlightenment of the utility model. The above specific implementation modes should not be understood as limiting the protection scope of the utility model. The protection scope of the utility model shall be based on the definition in the claims, and the description can be used to interpret the claims.

Claims

1. Pipeline cathodic protection test fixed test piece assembly, used to be set in the cathodic protection test pile of the buried pipeline to maintain the polarization state for direct detection; it is characterized by: The device comprises a test piece portion (4) and a cable (3), wherein the test piece portion (4) comprises a shell and a connector at one end of the shell, the cable (3) is connected to the test piece arranged in the shell via the connector, and the other end of the cable (3) is connected to a spare terminal of a test pile; It also comprises a switch module (7), one end of which is connected to the spare terminal of the test pile, and the other end of which is connected to the zero-position terminal of the test pile.

2. The pipeline cathodic protection test fixed test piece assembly according to claim 1, characterized in that: The test piece (4) is installed outside the test pile and in the soil at a distance of 25-40 cm from the position where the test pile contacts the soil. One end of the cable (3) penetrates into the test pile and is connected to a spare terminal.

3. The pipeline cathodic protection test fixed test piece assembly according to claim 1, characterized in that: The switch module (7) comprises an insulating plate and a switch assembly, wherein the switch assembly is arranged in the middle of the insulating plate, and two through holes for passing a spare terminal and a zero-position terminal are symmetrically arranged on both sides of the insulating plate; The switch assembly comprises two connecting heads, which are respectively connected to the spare connecting post and the zero-position connecting post on the corresponding side and are connected / disconnected by the switch assembly.

4. The pipeline cathodic protection test fixed test piece assembly according to claim 3, characterized in that: The switch assembly is a lever switch.

5. Test pile, characterized in that: A pipeline cathodic protection test fixed test piece assembly according to any one of claims 1 to 4 is provided, specifically comprising: The pile body (1) is a hollow columnar structure, and a circuit board (5) for detection is arranged inside; and The base is arranged at one end of the pile body (1), buried in the soil and fixed in position by bolts or rivets.

6. The test pile according to claim 5, characterized in that: A through hole is provided on the pile body (1) near the base, and the cable (3) passes through the through hole.

7. The test pile according to claim 5, characterized in that: The surface of the pile body (1) above the soil is provided with an inspection opening (2), the circuit board (5) is arranged in the inspection opening (2), a plurality of wiring terminals (6) are provided on the circuit board (5), and the cables (3) extend from the inside of the pile body (1) to the circuit board (5) and are connected to the wiring terminals (6) serving as spare wiring posts.

8. The test pile according to claim 7, characterized in that: The wiring terminals (6) include five groups, namely, test strip wiring posts, reference wiring posts, zero-position wiring posts, anode bed wiring posts and spare wiring posts. Each group of wiring terminals (6) is provided with a conductive plate (8) for connection. The two groups of wiring terminals (6) serving as zero-position wiring posts and spare wiring posts are arranged adjacent to each other. The switch module (7) is arranged between the two groups of wiring terminals (6) serving as zero-position wiring posts and spare wiring posts.

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