A water collection and moisturizing grounding module suitable for arid areas and a preparation method thereof

Abstract

The present invention discloses a water-collecting and moisturizing grounding module suitable for arid areas and a preparation method thereof, wherein the water-collecting and moisturizing grounding module comprises a flexible graphite grounding wire and a non-metallic module body coated on the outside of the flexible graphite grounding wire, the two ends of the flexible graphite grounding wire extend out of the non-metallic module body, and the non-metallic module body is dispersed with a plurality of holes and / or a plurality of channels, each hole is filled with a water-absorbing resin particle, and each channel is filled with a plurality of water-absorbing resin particles. The present invention has a good moisturizing and water-collecting capacity, can improve the serious loss of water resources around the grounding grid in arid areas, and has excellent properties such as acid and alkali resistance, corrosion resistance, high and low temperature resistance, no rust, stable electrical properties, and long service life.

Description

Technical Field

[0001] The invention relates to a grounding module, in particular to a water-collecting and moisture-keeping grounding module suitable for arid areas and a preparation method thereof. Background Art

[0002] The grounding module is a new type of grounding material and an important component of the lightning protection grounding system. Electronic equipment is connected to the grounding body through wires, and the grounding body is buried in the earth, which conducts the static electricity or leakage accumulated on the electronic equipment to the earth to avoid the risk of electric shock to the operator. The non-metallic module material on the outside of the grounding body has good contact with the earth, can be integrated with the soil, and can flow and penetrate into the surrounding soil gaps, forming a low-resistance area with a gentle resistivity change around the grounding body, greatly increasing the dispersion area of ​​the grounding body and greatly enhancing the dispersion effect of the grounding device. Because the grounding body has been buried underground for a long time, it has high environmental adaptability requirements. In some arid and water-scarce areas such as karst landforms, the grounding material is generally required to have a certain moisture absorption and moisture retention ability to ensure that the grounding module still maintains a stable grounding resistance and good dispersion stability in the arid soil environment. Summary of the invention

[0003] The purpose of the present invention is to provide a water-collecting and moisture-retaining grounding module suitable for arid areas and a preparation method thereof, which can not only slowly release the stored water under arid environmental conditions to keep the soil moist, but also absorb and collect rainwater to improve the serious water loss problem around the grounding grid in arid areas.

[0004] To achieve the above-mentioned purpose, the technical solution of the present invention is as follows: the water collection and moisturizing grounding module includes a flexible graphite grounding wire and a non-metallic module body coated on the outside of the flexible graphite grounding wire, the two ends of the flexible graphite grounding wire extend out of the non-metallic module body, and the non-metallic module body is dispersed with a plurality of holes and / or a plurality of channels, each hole is filled with a water-absorbing resin particle, and each channel is filled with a plurality of water-absorbing resin particles.

[0005] Preferably, the channels are arranged in parallel in layers within the non-metallic module body, both ends of the channels located in the outermost layer penetrate the non-metallic module body, and one end of the channels located in the inner layer penetrates the non-metallic module body.

[0006] Preferably, when a plurality of holes and a plurality of channels are dispersed inside the non-metallic module body, the plurality of channels are arranged in layers and in parallel near the center of the non-metallic module body, and each channel is connected to a plurality of holes.

[0007] Preferably, a resin filling port communicating with the end of the channel is provided on the surface of the non-metallic module body, and the resin filling port is blocked by a blocking block.

[0008] Preferably, a metal skeleton is buried inside the non-metallic module body, and the metal skeleton is connected to the flexible graphite grounding wire.

[0009] Preferably, the flexible graphite grounding wire is a solid cylinder, and the cross-section of the non-metallic module body is square, circular or plum blossom-shaped.

[0010] Preferably, the surface of the non-metallic module body is provided with concave-convex patterns.

[0011] The present invention also proposes a method for preparing a water-collecting and moisture-retaining grounding module suitable for arid areas, the preparation method comprising:

[0012] Ingredients: The ingredients are prepared according to the following weight percentages: 60-65% silicate, 22-27% flake graphite, 8-10% fly ash, and 3-5% water-absorbing resin;

[0013] Water-absorbing resin absorbs water: the water-absorbing resin after mixing is placed in water for 2 hours, the volume ratio of the water-absorbing resin to water is 1:1000, the water-absorbing resin absorbs water to form a hydrogel, and then drains for later use;

[0014] Mixing: Put the batched flake graphite, fly ash and silicate into a blender in sequence, add water, the weight of water and the total weight of flake graphite, fly ash and silicate put into the blender are in the ratio of 0.6:1, and stir for 5 minutes;

[0015] Dispersion of water-absorbent resin: Add the hydrogel formed after the water-absorbent resin absorbs water into the blender and stir for 1.5 minutes;

[0016] Casting: Pour the mixed material onto the outside of the metal frame connected to the flexible graphite grounding wire. After pressing and forming, place it in a cool place to dry and solidify naturally to form a grounding module with a specified shape. The volume of the hydrogel shrinks after losing water, and multiple holes are formed inside the non-metallic module.

[0017] Preferably, the preparation method further comprises:

[0018] Pre-hole making: After the mixing is completed, the mixed material is directly poured on the outside of the metal skeleton connected to the flexible graphite grounding wire, and multiple holes are pre-prepared inside the non-metallic module body through a hole making mold before solidification;

[0019] Filling of water-absorbent resin: The hydrogel formed after the water-absorbent resin absorbs water is poured into the channel from the resin filling port on the surface of the non-metallic module body, and the remaining material after mixing is used as a plugging material to seal the resin filling port. After pressing and forming, it is placed in a cool place to dry and solidify naturally to form a grounding module with a specified shape.

[0020] Preferably, the preparation method further comprises:

[0021] Pore ​​preparation: After the water-absorbing resin is dispersed, the stirred material is directly poured on the outside of the metal skeleton connected to the flexible graphite grounding wire. Before solidification, multiple channels are prepared near the center of the non-metallic module body through a hole-making mold;

[0022] Filling and curing: The same amount of hydrogel as that used in the water-absorbing resin dispersion is poured into the channel from the resin filling port on the surface of the non-metallic module body, and the remaining material after mixing is used as a sealing material to seal the resin filling port. After pressing and forming, it is placed in a cool place to dry and cure naturally to form a water-collecting and moisturizing grounding module with a specified shape. The volume of the hydrogel shrinks after losing water, and multiple holes are formed on the surface and inside of the non-metallic module body, and each channel connects multiple holes.

[0023] The water collection and moisture retention grounding module suitable for arid areas provided by the present invention has the following advantages: 1. A non-metallic flexible graphite material is used as a grounding body, which has excellent properties such as good acid and alkali resistance, corrosion resistance, high and low temperature resistance, no rust, stable electrical properties, and long service life; 2. The non-metallic module body outside the grounding body is filled with high-efficiency water-absorbing resin, which can absorb water hundreds to thousands of times heavier than itself. The hydrogel formed after absorbing water has a stable water storage effect, and it is difficult to separate water even under pressure; 3. Stable holes or channels that can accommodate resin are provided inside the non-metallic module body. When rainwater enters the holes or channels on rainy days, the resin absorbs water and expands, and can slowly release water under drought conditions to keep the surrounding soil moist. It has good water collection and moisture retention functions and can be used to improve the serious loss of water resources around the grounding grid in arid areas; 4. A metal skeleton is provided inside the non-metallic module body, so that the module body has a certain strength. The metal skeleton is connected to the flexible graphite grounding body, which can shunt the current and further improve its dispersion effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of the water collection and moisturizing grounding module of Example 1 of the present invention.

[0025] Figure 2 It is a cross-sectional view of the water collecting and moisturizing grounding module of Example 1 of the present invention.

[0026] Figure 3 It is a cross-sectional view of the water-collecting and moisturizing grounding module of Example 2 of the present invention.

[0027] Figure 4 It is a cross-sectional view of the water collecting and moisturizing grounding module of Example 3 of the present invention. DETAILED DESCRIPTION

[0028] The following examples are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0029] Example 1

[0030] according to Figure 1 and Figure 2 A water collection and moisture retaining grounding module suitable for arid areas proposed in this embodiment includes a flexible graphite grounding wire 2 and a non-metallic module body 1 coated on the outside of the flexible graphite grounding wire 2. Both ends of the flexible graphite grounding wire 2 extend out of the non-metallic module body 1. A plurality of holes 4 are dispersed inside the non-metallic module body 1. Each hole 4 is filled with a water-absorbing resin particle 5. A metal skeleton 3 is buried inside the non-metallic module body 1. The metal skeleton 3 is connected to the flexible graphite grounding wire 2 to realize current diversion. The flexible graphite grounding wire 2 is a solid cylinder. The cross-section of the non-metallic module body 1 is square, circular or plum blossom-shaped. The surface of the non-metallic module body 1 is provided with concave and convex patterns.

[0031] The water-absorbing resin contains 88% of low-crosslinked sodium polyacrylate, 8-10% of water and 0.5-1.0% of a crosslinking agent by weight, and the weight percentage of sodium in the low-crosslinked sodium polyacrylate is 24.5%.

[0032] A method for preparing a water-collecting and moisture-retaining grounding module suitable for arid areas in this embodiment includes:

[0033] Ingredients: The ingredients are prepared according to the following weight percentages: 60-65% silicate, 22-27% flake graphite, 8-10% fly ash, and 3-5% water-absorbing resin;

[0034] Water-absorbing resin absorbs water: the water-absorbing resin after mixing is placed in water for 2 hours, the volume ratio of the water-absorbing resin to water is 1:1000, the water-absorbing resin absorbs water to form a hydrogel, and then drains for later use;

[0035] Mixing: Put the batched flake graphite, fly ash and silicate into a blender in sequence, add water, the weight of water and the total weight of flake graphite, fly ash and silicate put into the blender are in the ratio of 0.6:1, and stir for 5 minutes;

[0036] Dispersion of water-absorbent resin: Add the hydrogel formed after the water-absorbent resin absorbs water into the blender and stir for 1.5 minutes;

[0037] Casting: Pour the mixed material onto the outside of the metal frame connected to the flexible graphite grounding wire. After pressing and forming, place it in a cool place to dry and solidify naturally to form a grounding module with a specified shape. The volume of the hydrogel shrinks after losing water, and multiple holes are formed inside the non-metallic module.

[0038] On rainy days, rainwater enters the holes filled with water-absorbing resin inside the non-metallic module body, and the resin absorbs water and expands, and releases water slowly under drought conditions, so that the surrounding soil remains moist, and has good water collection and moisture retention functions. The specifications of the grounding module made according to this method are 210mm×600mm×60mm, and the mass is about 13KG after testing. It can absorb more than 40KG of water on rainy days, and the slow release time after absorbing water can be as long as 2 months. The resistivity of the grounding module sample at room temperature is 0.28Ω·m after testing. The grounding module sample is applied with 10A power frequency current 5 times, each time for 10s, and 30min interval between each 2 times. The resistance change rate of the grounding module sample before and after the test is 10.5%. The grounding module sample is applied with 8 / 20μs, 1KA impulse current 20 times, each time with 1min interval, and the resistance change rate of the grounding module sample before and after the test is 8.6%. When the grounding module sample is subjected to mechanical strength test, no fracture or damage occurs.

[0039] Example 2

[0040] The overall structure of the water collection and moisturizing grounding module suitable for arid areas proposed in this embodiment is referred to as Figure 1 Its internal structure is as follows Figure 3 , including a flexible graphite grounding wire 2 and a non-metallic module body 1 coated on the outside of the flexible graphite grounding wire 2, both ends of the flexible graphite grounding wire 2 extend out of the non-metallic module body 1, and multiple channels 6 are dispersed inside the non-metallic module body 1, each channel 6 is filled with multiple water-absorbing resin particles 5, the channels 6 are arranged in layers and parallel inside the non-metallic module body 1, both ends of the channels 6 located in the outermost layer penetrate the non-metallic module body 1, and one end of the channels 6 located in the inner layer penetrates the non-metallic module body 1, and a resin filling port 7 connected to the end of the channel 6 is provided on the surface of the non-metallic module body 1, and the resin filling port 7 is blocked by a blocking block, a metal skeleton 3 is buried inside the non-metallic module body 1, and the metal skeleton 3 is connected to the flexible graphite grounding wire 2 to realize current diversion, the flexible graphite grounding wire 2 is a solid cylinder, the cross-section of the non-metallic module body 1 is square, circular or plum blossom-shaped, and the surface of the non-metallic module body 1 is provided with concave and convex patterns.

[0041] The water-absorbing resin contains 88% of low-crosslinked sodium polyacrylate, 8-10% of water and 0.5-1.0% of a crosslinking agent by weight, wherein the weight percentage of sodium in the low-crosslinked sodium polyacrylate is 24.5%.

[0042] A method for preparing a water-collecting and moisture-retaining grounding module suitable for arid areas in this embodiment includes:

[0043] Ingredients: The ingredients are prepared according to the following weight percentages: 60-65% silicate, 22-27% flake graphite, 8-10% fly ash, and 3-5% water-absorbing resin;

[0044] Water-absorbing resin absorbs water: the water-absorbing resin after mixing is placed in water for 2 hours, the volume ratio of the water-absorbing resin to water is 1:1000, the water-absorbing resin absorbs water to form a hydrogel, and then drains for later use;

[0045] Mixing: Put the batched flake graphite, fly ash and silicate into a blender in sequence, add water, the weight of water and the total weight of flake graphite, fly ash and silicate put into the blender are in the ratio of 0.6:1, and stir for 5 minutes;

[0046] Pre-hole making: After the mixing is completed, the mixed material is directly poured on the outside of the metal skeleton connected to the flexible graphite grounding wire, and multiple holes are pre-prepared inside the non-metallic module body through a hole making mold before solidification;

[0047] Filling of water-absorbent resin: The hydrogel formed after the water-absorbent resin absorbs water is poured into the channel from the resin filling port on the surface of the non-metallic module body, and the remaining material after mixing is used as a plugging material to seal the resin filling port. After pressing and forming, it is placed in a cool place to dry and solidify naturally to form a grounding module with a specified shape.

[0048] On rainy days, rainwater enters the pores filled with water-absorbing resin inside the non-metallic module body. The resin absorbs water and expands, and slowly releases water under drought conditions to keep the surrounding soil moist. The two ends of the pores located in the outermost layer pass through the non-metallic module body. The longer the length, the more conducive it is to the penetration and slow release of water, and it has better water collection and moisture retention functions. The specifications of the grounding module made according to this method are 210mm×600mm×60mm. The tested mass is about 12KG. It can absorb more than 40KG of water on rainy days, and the slow release time after water absorption can be as long as 2 months. The resistivity of the grounding module sample at room temperature was tested to be 0.32Ω·m. A 10A power frequency current was applied to the grounding module sample 5 times, each time for 10s, with an interval of 30min between each times. The resistance change rate of the grounding module sample before and after the test was 12.5%. An 8 / 20μs, 1KA impulse current was applied to the grounding module sample 20 times, with an interval of 1min each time. The resistance change rate of the grounding module sample before and after the test was 10.2%. No breakage or damage was found in the mechanical strength test of the grounding module sample.

[0049] Example 3

[0050] The overall structure of the water collection and moisturizing grounding module suitable for arid areas proposed in this embodiment is referenced Figure 1 Its internal structure is as follows Figure 4, including a flexible graphite grounding wire 2 and a non-metallic module body 1 coated on the outside of the flexible graphite grounding wire 2, both ends of the flexible graphite grounding wire 2 extend out of the non-metallic module body 1, a plurality of holes 4 and a plurality of channels 6 are dispersed inside the non-metallic module body 1, a plurality of holes 4 are also arranged on the surface of the non-metallic module body, each hole 4 is filled with a water-absorbing resin particle 5, each channel 6 is filled with a plurality of water-absorbing resin particles 5, a plurality of channels 6 are arranged in layers and in parallel near the center of the non-metallic module body 1, each channel 6 connects a plurality of holes 4, and the channels located on the outermost layer 6 passes through the non-metallic module body 1 at both ends, one end of the channel 6 located in the inner layer passes through the non-metallic module body 1, a resin filling port 7 connected to the end of the channel 6 is provided on the surface of the non-metallic module body 1, a plurality of holes are dispersed on the surface of the non-metallic module body 1, the resin filling port 7 is blocked by a blocking block, a metal skeleton 3 is buried inside the non-metallic module body 1, the metal skeleton 3 is connected to the flexible graphite grounding wire 2 to realize current diversion, the flexible graphite grounding wire 2 is a solid cylinder, the cross-section of the non-metallic module body 1 is square, circular or plum blossom-shaped, and the surface of the non-metallic module body 1 is provided with concave and convex patterns.

[0051] The water-absorbing resin contains 88% of low-crosslinked sodium polyacrylate, 8-10% of water and 0.5-1.0% of a crosslinking agent by weight, and the weight percentage of sodium in the low-crosslinked sodium polyacrylate is 24.5%.

[0052] A method for preparing a water-collecting and moisture-retaining grounding module suitable for arid areas in this embodiment includes:

[0053] Ingredients: The ingredients are prepared according to the following weight percentages: 60-65% silicate, 22-27% flake graphite, 8-10% fly ash, and 3-5% water-absorbing resin;

[0054] Water-absorbing resin absorbs water: the water-absorbing resin after mixing is placed in water for 2 hours, the volume ratio of the water-absorbing resin to water is 1:1000, the water-absorbing resin absorbs water to form a hydrogel, and then drains for later use;

[0055] Mixing: Put the batched flake graphite, fly ash and silicate into a blender in sequence, add water, the weight of water and the total weight of flake graphite, fly ash and silicate put into the blender are in the ratio of 0.6:1, and stir for 5 minutes;

[0056] Dispersion of water-absorbent resin: Add the hydrogel formed after the water-absorbent resin absorbs water into the blender and stir for 1.5 minutes;

[0057] Pore ​​preparation: After the water-absorbing resin is dispersed, the stirred material is directly poured on the outside of the metal skeleton connected to the flexible graphite grounding wire. Before solidification, multiple channels are prepared near the center of the non-metallic module body through a hole-making mold;

[0058] Filling and curing: The same amount of hydrogel as that used in the water-absorbing resin dispersion is poured into the channel from the resin filling port on the surface of the non-metallic module body, and the remaining material after mixing is used as a sealing material to seal the resin filling port. After pressing and forming, it is placed in a cool place to dry and cure naturally to form a water-collecting and moisturizing grounding module with a specified shape. The volume of the hydrogel shrinks after losing water, and multiple holes are formed on the surface and inside of the non-metallic module body, and each channel connects multiple holes.

[0059] On rainy days, rainwater enters the holes and channels filled with water-absorbing resin inside the non-metallic module body. In addition to the water collection and moisturizing function of the water-absorbing resin in the holes and channels, during the preparation of the grounding module, the hydrogel dispersed on the surface of the non-metallic module body loses water and forms holes on the surface of the non-metallic module body, which increases the contact area between the grounding module and the soil and the rainwater penetration area, and connects the holes near the center of the non-metallic module body through the channels. Compared with when there are only holes inside, it is more conducive to the flow of water in the center of the non-metallic module body, and the water collection and moisturizing effect is greatly increased. The specifications of the grounding module made according to this method are 210mm×600mm×60mm, and the weight is about 14KG after testing. It can absorb more than 60KG of water on rainy days, and the sustained release time after water absorption can be as long as 3 months. The resistivity of the grounding module sample at room temperature was tested to be 0.35Ω·m. A 10A power frequency current was applied to the grounding module sample 5 times, each time for 10s, with an interval of 30min between each times. The resistance change rate of the grounding module sample before and after the test was 9.8%. An 8 / 20μs, 1KA impulse current was applied to the grounding module sample 20 times, with an interval of 1min each time. The resistance change rate of the grounding module sample before and after the test was 7.6%. No breakage or damage was found in the mechanical strength test of the grounding module sample.

[0060] Although the present invention has been described in detail above by general description and specific embodiments, it is obvious to those skilled in the art that some modifications or improvements can be made to the present invention. Therefore, these modifications or improvements made without departing from the spirit of the present invention all belong to the scope of protection claimed by the present invention.

Claims

1. A water collection and moisturizing grounding module suitable for arid areas, characterized by: The water collection and moisture retaining grounding module comprises a flexible graphite grounding wire (2) and a non-metallic module body (1) coated on the outside of the flexible graphite grounding wire (2), the two ends of the flexible graphite grounding wire (2) extend outside the non-metallic module body (1), a plurality of holes (4) and / or a plurality of channels (6) are dispersed inside the non-metallic module body (1), each hole (4) is filled with a water-absorbing resin particle (5), and each channel (6) is filled with a plurality of water-absorbing resin particles (5); a metal skeleton (3) is buried inside the non-metallic module body (1), and the metal skeleton (3) is connected to the flexible graphite grounding wire (2); The method for preparing a water-collecting and moisturizing grounding module suitable for arid areas comprises: Ingredients: The ingredients are prepared according to the following weight percentages: 60-65% silicate, 22-27% flake graphite, 8-10% fly ash, and 3-5% water-absorbing resin; Water-absorbing resin absorbs water: the water-absorbing resin after mixing is placed in water for 2 hours, the volume ratio of the water-absorbing resin to water is 1:1000, the water-absorbing resin absorbs water to form a hydrogel, and then drains for later use; Mixing: Put the batched flake graphite, fly ash and silicate into a blender in sequence, add water, the weight of water and the total weight of flake graphite, fly ash and silicate put into the blender are in the ratio of 0.6:1, and stir for 5 minutes; Dispersion of water-absorbent resin: Add the hydrogel formed after the water-absorbent resin absorbs water into the blender and stir for 1.5 minutes; Casting: The mixed material is poured on the outside of the metal frame connected to the flexible graphite grounding wire. After pressing and forming, it is placed in a cool place to dry and solidify naturally to form a grounding module with a specified shape. The volume of the hydrogel shrinks after losing water, and multiple holes are formed inside the non-metallic module body; The preparation method further comprises: Pre-hole making: After the mixing is completed, the mixed material is directly poured on the outside of the metal skeleton connected to the flexible graphite grounding wire, and multiple holes are pre-prepared inside the non-metallic module body through a hole making mold before solidification; Filling of water-absorbing resin: the hydrogel formed after the water-absorbing resin absorbs water is poured into the channel from the resin filling port on the surface of the non-metallic module body, and the remaining material after mixing is used as a plugging material to plug the resin filling port. After pressing and forming, it is placed in a cool place to dry and solidify naturally to form a grounding module with a specified shape; The preparation method further comprises: Pore ​​preparation: After the water-absorbing resin is dispersed, the stirred material is directly poured on the outside of the metal skeleton connected to the flexible graphite grounding wire. Before solidification, multiple channels are prepared near the center of the non-metallic module body through a hole-making mold; Filling and curing: The same amount of hydrogel as that used in the water-absorbing resin dispersion is poured into the channel from the resin filling port on the surface of the non-metallic module body, and the remaining material after mixing is used as a sealing material to seal the resin filling port. After pressing and forming, it is placed in a cool place to dry and cure naturally to form a water-collecting and moisturizing grounding module with a specified shape. The volume of the hydrogel shrinks after losing water, and multiple holes are formed on the surface and inside of the non-metallic module body, and each channel connects multiple holes.

2. A water-collecting and moisturizing grounding module suitable for arid areas according to claim 1, characterized in that: The channels (6) are arranged in layers and in parallel inside the non-metallic module body (1); both ends of the channels (6) located in the outermost layer penetrate the non-metallic module body (1), and one end of the channels (6) located in the inner layer penetrates the non-metallic module body (1).

3. The water-collecting and moisturizing grounding module suitable for arid areas according to claim 2, characterized in that: When a plurality of holes (4) and a plurality of channels (6) are dispersed inside the non-metallic module body (1), the plurality of channels (6) are arranged in layers and in parallel near the center of the non-metallic module body (1), and each channel (6) is connected to the plurality of holes (4).

4. The water-collecting and moisturizing grounding module suitable for arid areas according to claim 1, characterized in that: The surface of the non-metallic module body (1) is provided with a resin filling port (7) communicating with the end of the channel (6), and the resin filling port (7) is blocked by a blocking block.

5. The water-collecting and moisturizing grounding module suitable for arid areas according to claim 1, characterized in that: The flexible graphite grounding wire (2) is a solid cylinder, and the cross-section of the non-metallic module body (1) is square, circular or plum blossom-shaped.

6. The water-collecting and moisturizing grounding module suitable for arid areas according to claim 1, characterized in that: The surface of the non-metallic module body (1) is provided with concave-convex patterns.

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