Test electrode structure suitable for grounding resistance deep well test method
By designing a test electrode structure suitable for longitudinal deep wells, the problem of limited electrode layout is solved and efficient and stable ground resistance measurement is achieved.
Patent Information
- Application Number
- CN202421974737.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-15
- Publication Date
- 2025-08-22
- Estimated Expiration
- 2034-08-15
AI Technical Summary
When measuring grounding resistance with the existing horizontal line lay-off method, it is limited by the terrain and traffic conditions, and the electrode layout is inconvenient, so it cannot be fixed and isolated from each other in the longitudinal deep well.
Design a test electrode structure suitable for longitudinal deep wells, using brackets and current and voltage test electrodes, splicing and reinforcement through PE tubes, and using metal materials and insulated cables to achieve the fixation and electrical isolation of the electrodes in the deep wells.
Improves the efficiency of line laying construction, protects the test cable from damage, and realizes stable fixation and electrical isolation of electrodes in deep wells.
Smart Images
Figure CN223259805U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of grounding resistance testing, in particular to a testing electrode structure suitable for a grounding resistance deep well testing method. Background Art
[0002] The statements in this section merely provide background information related to the present disclosure and may not constitute prior art.
[0003] Grounding resistance is a key indicator of the overall current dissipation performance of the grounding grid. It is also the most important parameter in the grounding grid safety index and an important indicator for measuring the effectiveness and safety of the grounding system.
[0004] At present, the industry generally adopts the horizontal line measurement method. Figure 5 This method requires the placement of test electrodes over long distances on the surface, and the placement of electrodes is restricted by topography, traffic conditions, and personnel safety.
[0005] This solution, however, uses a vertical deep-well testing method that differs from horizontal line testing. The test electrodes are arranged vertically underground, not horizontally on the surface. Since they are permanently fixed within the vertical deep-well, they cannot be altered. Therefore, a specialized test electrode design is required to secure the electrodes at the calculated depth and electrically isolate them from each other, while also protecting the electrode test lines. Utility Model Content
[0006] The purpose of the utility model is to provide a test electrode structure suitable for a ground resistance deep well test method in response to the problems existing in the prior art, which is suitable for a test method based on a vertical deep well, thereby solving the above problems.
[0007] The technical solution of the utility model is as follows:
[0008] A test electrode structure suitable for a ground resistance deep well test method comprises: a bracket, the length of which is consistent with the designed depth of the deep well; a current test electrode is installed at the end of the bracket, and a voltage test electrode is installed in the middle; the current test electrode and the voltage test electrode are both connected to an external ground resistance tester via test wires; the bracket is hollow inside, and small holes are opened on the bracket at positions corresponding to the current test electrode and the voltage test electrode; the test wires are all inserted into the bracket through the small holes and exit from above the bracket.
[0009] Furthermore, the bracket is formed by splicing a number of PE pipes, and the splicing positions are fixed by sleeves of another type of PE pipe and reinforced by special bolts for hollow bricks.
[0010] Furthermore, the current test pole is a metal tube with a conical lower end and a load-bearing ring at the upper end for fixing the load-bearing rope.
[0011] Furthermore, a load-bearing ring is welded on the left and right sides of the upper end of the current testing pole.
[0012] Furthermore, a stainless steel bolt is connected to the upper end of the current testing pole, and a terminal is installed on the stainless steel bolt for connecting a testing line.
[0013] Furthermore, the voltage testing electrode is a clamp made of metal material, and the clamp is tightly locked on the outside of the bracket.
[0014] Furthermore, the clamp is mounted on the bracket via stainless steel bolts, and a terminal is mounted on one of the stainless steel bolts for connecting a test line.
[0015] Furthermore, the test wires are all double-insulated cables.
[0016] Compared with the existing technology, the beneficial effects of the present invention are:
[0017] A test electrode structure suitable for a deep-well ground resistance test method can be prefabricated as a whole outside the well, achieving high wire-laying construction efficiency. High-strength plastic pipes are used as supports. The integrated structure solves the problems of fixing current and voltage test electrodes in deep wells and preventing them from being electrically connected to each other. It also protects the test cable from damage caused by construction and settlement. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 This is a schematic diagram of a test electrode structure suitable for a ground resistance deep well test method;
[0019] Figure 2 is a schematic diagram of the structure of the bracket;
[0020] Figure 3 It is a structural diagram of the current test electrode;
[0021] Figure 4 It is a structural diagram of the voltage test electrode;
[0022] Figure 5 This is a schematic diagram for horizontal line laying and ground resistance testing.
[0023] Reference numerals: 1- bracket, 2- current test pole, 3- voltage test pole, 4- load-bearing lifting ring, 5- stainless steel bolt, 6- terminal block, 7- special bolt for hollow brick. DETAILED DESCRIPTION
[0024] It should be noted that relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus comprising the element.
[0025] The features and performance of the present invention are further described in detail below with reference to the embodiments.
[0026] Example 1
[0027] See also Figure 1 , a test electrode structure suitable for a ground resistance deep well test method, specifically comprising:
[0028] Bracket 1, the length of which is consistent with the designed depth of the deep well; a current test pole 2 is installed at the end of the bracket 1, and a voltage test pole 3 is installed in the middle; that is, the current test pole 2 is installed at the bottom of the deep well, serving as both a current return pole and a load-bearing device for fixing the bracket 1;
[0029] The current test electrode 2 and the voltage test electrode 3 are both connected to an external ground resistance tester via test wires. The interior of the bracket 1 is hollow, and small holes are provided on the bracket 1 at positions corresponding to the current test electrode 2 and the voltage test electrode 3. The test wires are inserted into the bracket 1 through the small holes and exit from the top of the bracket 1, thereby protecting the test wires.
[0030] When in use, it is only necessary to place the assembled bracket 1 into the deep well and then backfill the deep well.
[0031] In this embodiment, specifically, the bracket 1 is made of several PE pipes, and the splicing position is fixed with another type of PE pipe sleeve, and reinforced with a hollow brick special bolt 7; for example, a 63*3.7mm PE pipe with a length of 100 meters is used for splicing, and a 75*4.5mm PE pipe with a length of 1 meter is used for the joint. After the two types of PE pipes are connected inside and outside, 8 holes are drilled at 0.5m above and below. Round hole, with The bracket 1 is connected with the special bolts 7 for hollow bricks.
[0032] In this embodiment, specifically, the current testing pole 2 is a metal tube, and the material can be selected from stainless steel, hot-dip galvanized steel, pure copper, etc.; the lower end is conical, which is convenient for piercing into the soil at the bottom of the deep well, and the upper end is provided with a load-bearing ring 4 for fixing the load-bearing rope.
[0033] In this embodiment, specifically, a load-bearing ring 4 is welded to the left and right sides of the upper end of the current testing pole 2 .
[0034] In this embodiment, specifically, a stainless steel bolt 5 is connected to the upper end of the current testing electrode 2 , and a wiring terminal 6 is installed on the stainless steel bolt 5 for connecting a testing line.
[0035] In this embodiment, specifically, the voltage testing electrode 3 is a clamp made of metal material, and the clamp is tightly locked to the outside of the bracket 1; preferably, the metal material can be stainless steel, hot-dip galvanized steel, pure copper, etc.
[0036] In this embodiment, specifically, the clamp is mounted on the bracket 1 via stainless steel bolts 5 , and a terminal 6 is mounted on one of the stainless steel bolts 5 for connecting a test line.
[0037] In this embodiment, specifically, the test wires are all double-insulated cables.
[0038] Specifically, the method of using the test electrode structure is as follows:
[0039] Connect the current terminal C1 of the ground resistance tester to the lead-out terminal of the current test electrode C in the deep well, and the voltage terminal P1 of the ground resistance tester to the lead-out terminal of the voltage test electrode P in the deep well. Then, connect the C2 and P2 terminals of the ground resistance tester to the ground grid injection point. The current (I) injected through the ground grid forms a current loop with the current test electrode C1 in the deep well, and the ground grid potential rise (ΔE) is collected through the P1 terminal (zero potential). The grounding resistance of the ground grid can be calculated using the following formula:
[0040] The above-described embodiments merely represent specific implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of protection of the present application. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the technical concept of the present application, and all such variations and improvements fall within the scope of protection of the present application.
[0041] This background technology section is provided to generally present the context of the present invention, and the work of the presently named inventors, the work to the extent described in this background technology section, and aspects of the description in this section that did not constitute prior art at the time of application are neither explicitly nor implicitly admitted to be prior art to the present invention.
Claims
1. A test electrode structure suitable for a ground resistance deep well test method, characterized in that: include: A support (1), wherein the length of the support (1) is consistent with the designed depth of the deep well; The bracket (1) is provided with a current test electrode (2) at its end and a voltage test electrode (3) at its middle; the current test electrode (2) and the voltage test electrode (3) are both connected to an external ground resistance tester via test wires; the bracket (1) is hollow inside, and small holes are provided on the bracket (1) at positions corresponding to the current test electrode (2) and the voltage test electrode (3); the test wires are passed through the bracket (1) via the small holes and are passed out from above the bracket (1).
2. A test electrode structure suitable for a ground resistance deep well test method according to claim 1, characterized in that: The bracket (1) is formed by splicing a plurality of PE pipes, and the splicing positions are fixed by sleeves of another type of PE pipe and reinforced by special bolts (7) for hollow bricks.
3. A test electrode structure suitable for a ground resistance deep well test method according to claim 1, characterized in that: The current testing pole (2) is a metal tube with a conical lower end and a load-bearing ring (4) provided at the upper end for fixing a load-bearing rope.
4. A test electrode structure suitable for a ground resistance deep well test method according to claim 3, characterized in that: A load-bearing ring (4) is welded to the left and right sides of the upper end of the current testing pole (2).
5. The test electrode structure suitable for the ground resistance deep well test method according to claim 3, characterized in that: The upper end of the current testing pole (2) is connected to a stainless steel bolt (5), and a wiring terminal (6) is installed on the stainless steel bolt (5) for connecting a testing line.
6. The test electrode structure suitable for the ground resistance deep well test method according to claim 1, characterized in that: The voltage testing pole (3) is a clamp made of metal material, and the clamp is tightly locked on the outside of the bracket (1).
7. A test electrode structure suitable for a ground resistance deep well test method according to claim 6, characterized in that: The clamp is mounted on the bracket (1) via stainless steel bolts (5), and a wiring terminal (6) is mounted on one of the stainless steel bolts (5) for connecting a test line.
8. The test electrode structure suitable for the ground resistance deep well test method according to claim 1, characterized in that: The test wires are all double-insulated cables.