Carbon fiber composite grounding body and manufacturing method and mold thereof

Abstract

The invention discloses a carbon fiber composite grounding body and a manufacturing method and a mold thereof. The grounding body comprises a metal framework and a carbon fiber composite material protection layer wrapping the outer surface of the metal framework. The carbon fiber composite material protection layer is made of a carbon fiber composite material; raw materials of the carbon fiber composite material comprise an anhydrous phase and a water phase, and the anhydrous phase comprises the following components in percentage by mass: 30%-40% of Portland cement, 15%-20% of bentonite, 10%-15% of silica fume, 10%-15% of graphite, 1%-5% of carbon fibers, 5%-10% of stainless steel fibers and 1%-5% of polyacrylamide. According to the carbon fiber composite grounding body and the manufacturing method and the mold thereof, the resistance reduction characteristic and the heat and corrosion resistance of the grounding body can be improved, the power transmission grounding stability and safety requirements are met, the service life is greatly prolonged, replacement and maintenance are avoided, and a large amount of manpower and material resources are saved.

Description

Technical Field

[0001] The invention relates to the technical field of power transmission line grounding, and in particular to a carbon fiber composite grounding body and a manufacturing method and a mold thereof. Background Art

[0002] With the development of science and technology, people's demand for electricity is increasing, and the requirements for power transmission stability and safety are also getting higher and higher. The tripping of transmission lines caused by lightning in nature is an important factor threatening the safe and reliable operation of the power system. Studies have shown that by reducing the grounding resistance of transmission equipment such as towers, the tripping of transmission lines caused by lightning can be effectively improved.

[0003] However, traditional power transmission equipment usually uses flat steel, stainless steel, copper, and galvanized steel with electroplated metal layers, stainless steel clad steel, and copper clad steel metal grounding materials. The metal material is not homogeneous with the soil. After construction, the contact between the two is not dense and the contact resistance is large. At the same time, the corrosion resistance of the metal material is poor, which not only easily causes galvanic corrosion and brings hidden dangers to power transmission safety, but also accelerates corrosion over time, increases the grounding resistance, and reduces the grounding performance. Therefore, in some places with high soil resistivity or inconvenient construction, it is difficult to achieve the requirements of grounding stability and safety by only using traditional metal grounding materials. Meeting the grounding requirements by extending the laying length will bring about problems such as large construction excavation volume and excessively high construction costs. Summary of the invention

[0004] The purpose of the present invention is to solve the technical problem that the metal grounding materials used in traditional power transmission equipment in the prior art are not homogeneous with the soil and have poor corrosion resistance, resulting in loose contact and large contact resistance, which makes it difficult to meet the requirements of power transmission grounding stability and safety.

[0005] The purpose of the present invention is to adopt the following technical solutions to achieve:

[0006] The present invention proposes a carbon fiber composite grounding body, comprising: a metal frame and a carbon fiber composite material protective layer coated on the outer surface of the metal frame; the carbon fiber composite material protective layer is made of carbon fiber composite material; the raw material of the carbon fiber composite material comprises an anhydrous phase and an aqueous phase, and the anhydrous phase comprises the following components by mass percentage:

[0007] 30% to 40% Portland cement, 15% to 20% bentonite, 10% to 15% silica fume, 10% to 15% graphite, 1% to 5% carbon fiber, 5% to 10% stainless steel fiber and 1% to 5% polyacrylamide.

[0008] Preferably, the carbon fiber composite material comprises the following components by mass percentage:

[0009] 30% Portland cement, 20% bentonite, 15% silica fume, 15% graphite, 5% carbon fiber, 10% stainless steel fiber and 5% polyacrylamide.

[0010] Preferably, the method for preparing the carbon fiber composite material comprises:

[0011] Mixing silicate cement, silica fume, graphite, carbon fiber, stainless steel fiber and polyacrylamide in a certain proportion to obtain a mixture, adding water to the mixture, and stirring to obtain a first slurry;

[0012] adding water to the bentonite to expand it, adding the expanded bentonite to the first slurry, and stirring to obtain a second slurry;

[0013] Water is added to the second slurry, and the mixture is stirred to obtain the carbon fiber composite material.

[0014] Preferably, the water content added to the mixture is 2-5% by weight.

[0015] Preferably, the water content added to the bentonite is 50-80% by weight.

[0016] Preferably, the water content added to the second slurry is 40-50% by weight.

[0017] Preferably, in the step of adding the first aqueous phase to the mixture and stirring to obtain the first slurry, the stirring speed is 27-34 r / min, and the stirring time is 10-15 min; in the step of adding the third aqueous phase to the second slurry and stirring to obtain the carbon fiber composite material, the stirring speed is 52-58 r / min, and the stirring time is 5-10 min.

[0018] Preferably, the metal skeleton comprises: a trunk and at least one branch; a plurality of the branches are symmetrically distributed at intervals on both sides of the trunk.

[0019] Preferably, the branches and the main trunk are arranged perpendicular to each other.

[0020] Preferably, the branches located on the same side of the main trunk are arranged in parallel.

[0021] Preferably, the outer surfaces of the main trunk and the branches are both provided with an anti-corrosion layer.

[0022] Preferably, the anti-corrosion layer comprises: an anti-rust paint layer and / or a galvanized layer.

[0023] Preferably, the metal skeleton further comprises: a connecting piece, one connecting piece is respectively arranged at both ends of the metal skeleton; and a connecting hole is arranged on the connecting piece.

[0024] Based on the same inventive concept, the present invention also provides a mold for making the above-mentioned carbon fiber composite grounding body, the mold comprising: a base plate, multiple end plates and multiple side sealing plates; the end plates and the side sealing plates are respectively arranged on the upper surface of the base plate, and are surrounded by the base plate to form a cavity, and the carbon fiber composite grounding body is accommodated in the cavity.

[0025] Preferably, the mold further comprises: a plurality of partitions arranged in the cavity; the partitions divide the cavity into a plurality of sub-cavities, and each of the sub-cavities accommodates one of the carbon fiber composite grounding bodies.

[0026] Preferably, the partition plate is arranged parallel to the end plate.

[0027] Preferably, the side sealing plate is arranged on one side of the end of the partition, and the side sealing plate includes: an upper sealing plate and a lower sealing plate connected up and down; the bottom surface of the lower sealing plate is fixedly connected to the upper surface of the bottom plate, and the left and right side surfaces of the lower sealing plate are respectively fixedly connected to the end plate; the bottom surface of the upper sealing plate is fit-connected to the top surface of the lower sealing plate, and the left and right side surfaces of the upper sealing plate are respectively fit-connected to the end plates.

[0028] Preferably, the top surface of the lower sealing plate is provided with a plurality of grooves, and the bottom surface of the upper sealing plate is provided with a plurality of convex grooves, one of the grooves is correspondingly fitted and connected with one of the convex grooves to form a socket, one of the sockets is correspondingly connected with one of the sub-cavities, and the end of the metal skeleton is plugged into the corresponding socket.

[0029] Based on the same inventive concept, the present invention also provides a method for manufacturing the above-mentioned carbon fiber composite grounding body, the manufacturing method comprising:

[0030] A mold for making a carbon fiber composite grounding body, wherein the mold has a cavity;

[0031] Making a metal skeleton, and placing the metal skeleton in the cavity with a gap between the metal skeleton and the cavity;

[0032] Making a carbon fiber composite material protective layer, preparing a carbon fiber composite material, and pouring the carbon fiber composite material into the gap to form a carbon fiber composite material protective layer covering the outside of the metal skeleton;

[0033] After demoulding and curing, the carbon fiber composite grounding body is obtained.

[0034] Compared with the prior art, the present invention has the following beneficial effects:

[0035] The carbon fiber composite grounding body provided by the present invention is formed by coating a layer of carbon fiber composite material protective layer on the outside of a metal skeleton, wherein the carbon fiber composite material protective layer is made of carbon fiber composite material. As a current discharge material, the carbon fiber composite material has better hygroscopicity and adhesion than metal, and its compactness of adhesion to the soil is also better than that of metal, thereby reducing the contact resistance between the grounding body and the soil and the grounding resistance of the grounding body itself; secondly, the carbon fiber composite material itself has thermal stability and strong alkalinity, and can form a non-soluble passivation film on the metal surface, which has a good heat and corrosion resistance effect on the metal skeleton, and improves the overall heat and corrosion resistance of the grounding body. The present invention reasonably optimizes the components and ratios of the carbon fiber composite material to form a carbon fiber composite material protective layer coated on the outer surface of the metal skeleton. The prepared carbon fiber composite grounding body has excellent resistance reduction characteristics and corrosion resistance, has stable electrical performance, can meet the stability and safety requirements of power transmission grounding, and greatly extends the service life, avoids replacement and maintenance, and saves a lot of manpower and material resources.

[0036] The carbon fiber composite grounding body manufacturing method and mold provided by the present invention have a simple process flow and are easy to operate. The carbon fiber composite material is poured into a mold equipped with a metal skeleton in the form of a slurry. The solidification process is in contact with the metal skeleton from beginning to end, which increases the firmness of the combination of the two. The carbon fiber composite grounding body obtained has strong stability, ensuring that it has good resistance reduction characteristics and corrosion resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 A schematic diagram of a top view of a carbon fiber composite grounding body of the present invention;

[0038] Figure 2 It is a front view structural schematic diagram of a carbon fiber composite grounding body of the present invention;

[0039] Figure 3 This is a schematic diagram of the overall structure of a mold for making a carbon fiber composite grounding body according to the present invention;

[0040] Figure 4 It is a left-side structural schematic diagram of a mold for manufacturing a carbon fiber composite grounding body according to the present invention;

[0041] Figure 5 It is a schematic diagram of the axial cross-sectional structure of a carbon fiber composite grounding body before demoulding of the present invention;

[0042] Figure 6 It is a galvanized steel monomer and connects multiple carbon fiber composite grounding bodies for impact grounding resistance;

[0043] Figure 7 This is the measurement result diagram of simulated soil electrical corrosion rate;

[0044] Figure 8 This is a typical measurement result of real soil electrical corrosion rate.

[0045] Among them, the grounding body 100, the metal skeleton 101, the trunk 111, the branch 112, the connecting piece 113, the carbon fiber composite material protective layer 102, the mold 200, the sub-cavity 200a, the bottom plate 201, the end plate 202, the side sealing plate 203, the upper sealing plate 231, the protruding groove 2311, the lower sealing plate 232, the groove 2321, the jack 203a, and the partition 204. DETAILED DESCRIPTION

[0046] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0047] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0048] Example 1

[0049] An embodiment of the present invention provides a carbon fiber composite material, the preparation raw materials of which include: an anhydrous phase and an aqueous phase, the anhydrous phase including the following components by mass percentage: 30% silicate cement, 20% bentonite, 15% silica fume, 15% graphite, 5% carbon fiber, 10% stainless steel fiber and 5% polyacrylamide.

[0050] The method for preparing the carbon fiber composite material comprises the following steps:

[0051] S101: mixing silicate cement, silica fume, graphite, carbon fiber, stainless steel fiber and polyacrylamide in the above proportions to obtain a mixture, adding 2% by mass of water to the mixture, stirring at a low speed of 27 r / min for 15 minutes to uniformly disperse the mixture, and obtaining a first slurry;

[0052] S102: adding 50% by weight of water to the bentonite to expand it, adding the expanded bentonite to the first slurry, and stirring to obtain a second slurry;

[0053] S103: adding 50% by mass of water to the second slurry, stirring at a high speed of 58 r / min for 5 minutes to increase the density of the slurry, and obtaining the carbon fiber composite material.

[0054] Example 2

[0055] An embodiment of the present invention provides a carbon fiber composite material, the preparation raw materials of which include: an anhydrous phase and an aqueous phase, the anhydrous phase including the following components by mass percentage: 40% silicate cement, 20% bentonite, 10% silica fume, 10% graphite, 5% carbon fiber, 10% stainless steel fiber and 5% polyacrylamide.

[0056] The method for preparing the carbon fiber composite material comprises the following steps:

[0057] S101: mixing silicate cement, silica fume, graphite, carbon fiber, stainless steel fiber and polyacrylamide in the above proportions to obtain a mixture, adding 5% by mass of water to the mixture, and stirring at a low speed of 34 r / min for 10 minutes to obtain a first slurry;

[0058] S102: adding 80% by weight of water to the bentonite to expand it, adding the expanded bentonite to the first slurry, and stirring to obtain a second slurry;

[0059] S103: adding 50% by mass of water to the second slurry, stirring at a high speed of 58 r / min for 5 minutes to obtain the carbon fiber composite material.

[0060] Example 3

[0061] An embodiment of the present invention provides a carbon fiber composite material, the preparation raw materials of which include: an anhydrous phase and an aqueous phase, the anhydrous phase including the following components by mass percentage: 40% silicate cement, 18% bentonite, 15% silica fume, 15% graphite, 1% carbon fiber, 10% stainless steel fiber and 1% polyacrylamide.

[0062] The method for preparing the carbon fiber composite material comprises the following steps:

[0063] S101: mixing silicate cement, silica fume, graphite, carbon fiber, stainless steel fiber and polyacrylamide in the above proportions to obtain a mixture, adding 4% by mass of water to the mixture, and stirring at a low speed of 30 r / min for 10 minutes to obtain a first slurry;

[0064] S102: adding 60% by weight of water to the bentonite to expand it, adding the expanded bentonite to the first slurry, and stirring to obtain a second slurry;

[0065] S103: adding 40% by mass of water to the second slurry, stirring at a high speed of 52 r / min for 10 min to obtain the carbon fiber composite material.

[0066] Example 4

[0067] An embodiment of the present invention provides a carbon fiber composite material, the preparation raw materials of which include: an anhydrous phase and an aqueous phase, the anhydrous phase including the following components by mass percentage: 35% silicate cement, 20% bentonite, 15% silica fume, 15% graphite, 5% carbon fiber, 5% stainless steel fiber and 5% polyacrylamide.

[0068] The method for preparing the carbon fiber composite material comprises the following steps:

[0069] S101: mixing silicate cement, silica fume, graphite, carbon fiber, stainless steel fiber and polyacrylamide in the above proportions to obtain a mixture, adding 2% by mass of water to the mixture, and stirring at a low speed of 30 r / min for 15 minutes to obtain a first slurry;

[0070] S102: adding 50% by weight of water to the bentonite to expand it, adding the expanded bentonite to the first slurry, and stirring to obtain a second slurry;

[0071] S103: adding 50% by mass of water to the second slurry, stirring at a high speed of 55 r / min for 8 minutes to obtain the carbon fiber composite material.

[0072] Example 5

[0073] An embodiment of the present invention provides a carbon fiber composite material, the preparation raw materials of which include: an anhydrous phase and an aqueous phase, the anhydrous phase including the following components by mass percentage: 35% silicate cement, 20% bentonite, 14% silica fume, 15% graphite, 4% carbon fiber, 10% stainless steel fiber and 2% polyacrylamide.

[0074] The method for preparing the carbon fiber composite material comprises the following steps:

[0075] S101: mixing silicate cement, silica fume, graphite, carbon fiber, stainless steel fiber and polyacrylamide in the above proportions to obtain a mixture, adding 5% by mass of water to the mixture, and stirring at a low speed of 27 r / min for 15 minutes to obtain a first slurry;

[0076] S102: adding 50% by weight of water to the bentonite to expand it, adding the expanded bentonite to the first slurry, and stirring to obtain a second slurry;

[0077] S103: adding 40% by mass of water to the second slurry, stirring at a high speed of 58 r / min for 5 minutes to obtain the carbon fiber composite material.

[0078] Example 6

[0079] Figure 1 A schematic diagram of a top view of a carbon fiber composite grounding body of the present invention; Figure 2 This is a schematic diagram of the front view of a carbon fiber composite grounding body of the present invention. Figure 1 , Figure 2 The carbon fiber composite grounding body provided in the embodiment of the present invention comprises: a metal frame 101 and a carbon fiber composite material protective layer 102 , wherein the carbon fiber composite material protective layer 102 is coated on the outer surface of the metal frame 101 .

[0080] The metal skeleton 101 is used as a grounding substrate, including but not limited to copper, steel, copper-plated steel, carbon steel, galvanized steel, etc. The carbon fiber composite material protective layer 102 is used as a substrate outer protective layer, including but not limited to being made of the carbon fiber composite material described in Examples 1-5.

[0081] The embodiment of the present invention forms a carbon fiber composite grounding body 100 by coating a layer of carbon fiber composite material protective layer 102 on the outside of a metal skeleton 101. As a current discharge material, the carbon fiber composite material has better hygroscopicity and adhesion than metal, and its compactness with soil is also better than metal, so that the contact resistance between the grounding body 100 and the soil and the grounding resistance of the grounding body 100 itself can be reduced; secondly, the carbon fiber composite material itself has thermal stability and strong alkalinity, and can form a non-soluble passivation film on the metal surface, which has a good heat resistance and corrosion resistance effect on the metal skeleton 101, and improves the overall heat resistance and corrosion resistance of the grounding body 100. The present invention forms a carbon fiber composite material protective layer 102 coated on the outer surface of the metal skeleton 101 by reasonably optimizing the components and proportions of the carbon fiber composite material. The prepared carbon fiber composite grounding body 100 has excellent resistance reduction characteristics and corrosion resistance, has stable electrical performance, can meet the stability and safety requirements of power transmission grounding, and greatly extends the service life, avoids replacement and maintenance, and saves a lot of manpower and material resources.

[0082] The carbon fiber composite grounding body 100 of the embodiment of the present invention has excellent resistance reduction characteristics and corrosion resistance compared with the traditional grounding body. The following takes the carbon fiber composite material protective layer 102 made of the carbon fiber composite material of Example 1 as an example to further illustrate the resistance reduction characteristic test and laboratory accelerated corrosion test of the carbon fiber composite grounding body 100:

[0083] 1. Resistance reduction characteristics test:

[0084] 1.1 Experimental subjects

[0085] Control group: galvanized steel grounding body, constituting comparative sample 1;

[0086] Experimental group: a carbon fiber composite grounding electrode 100, which is composed of a steel matrix and an outer surface covered with a carbon fiber composite material protective layer 102, wherein the carbon fiber composite material protective layer 102 is made of the carbon fiber composite material described in Example 1; 2, 3, and 4 carbon fiber composite grounding electrodes 100 are connected in series with galvanized steel grounding electrodes to form Sample 1, Sample 2, and Sample 3.

[0087] 1.2 Impact grounding resistance measurement and result analysis

[0088] The three-pole method was used to measure the impulse grounding resistance of comparison sample 1, sample 1, sample 2, and sample 3 under different impulse currents. The measurement results are as follows: Figure 6 As shown, it can be calculated through the grounding resistance measurement results that after 2, 3, and 4 carbon fiber composite grounding electrodes 100 are connected in series to the galvanized steel grounding electrode 100, the impact grounding resistance is reduced by 16.7%, 25.8%, and 29.2%, respectively. The results show that by connecting the carbon fiber composite grounding electrode 100 of the embodiment of the present invention, the impact grounding resistance of the grounding electrode can be significantly reduced, and it has good resistance reduction characteristics.

[0089] 2. Laboratory accelerated corrosion test:

[0090] 2.1 Experimental subjects:

[0091] Control group: copper grounding body sample, copper-plated steel grounding body sample, carbon steel grounding body sample, galvanized steel grounding body sample;

[0092] Experimental group: a carbon fiber composite grounding body sample, which is composed of a steel substrate and an outer surface covered with a carbon fiber composite material protective layer 102 described in Example 1.

[0093] 2.2 Soil corrosivity test

[0094] 2.2.1 Simulated soil electrical corrosion test

[0095] (1) Sample collection: Soil from acidic (pH=5), alkaline (pH=9) and high-salinity (pH=7) construction areas was collected, and impurities were screened out. The soil was ground and sieved; the sieved soil was placed in an oven at 75°C for 8 h, and then distilled water (30% water content in the soil to simulate actual corrosion conditions) was added to prepare acidic test soil, alkaline test soil and high-salinity test soil;

[0096] (2) Accelerated corrosion test: Take three identical containers and fill them with the acid test soil, alkaline test soil and high-salt test soil respectively. In each container, grounding samples of the control group and the experimental group are vertically inserted at intervals. The three containers are placed in a constant temperature and humidity chamber for accelerated corrosion test. The corrosion cycle is 12 days.

[0097] (3) Calculation of corrosion rate: After the accelerated corrosion test, take out the grounding body samples in the container, clean and dry them, weigh them, measure the corrosion weight loss of the samples, and calculate the corrosion rate of each sample according to the corrosion weight loss method. The simulated soil electrical corrosion rate measurement results are as follows: Figure 7 shown.

[0098] 2.2.2 Typical real soil electrical corrosion test

[0099] Soil samples were collected from construction sites in Tianjin Binhai, Tianjin Jixian, Hubei Xiangyang, Hubei Wuhan, Jiangxi Nanchang and Sichuan Chengdu. The accelerated corrosion test of grounding samples in the test soil and the calculation process of sample corrosion rate were the same as the simulated soil electrical corrosion test. Typical real soil electrical corrosion rate measurement results are shown in Figure 2. Figure 8 shown.

[0100] 2.2.3 Results Analysis

[0101] Depend on Figure 7 , Figure 8 It can be seen that, whether in simulated acidic, alkaline, high-salt soil or in typical real soil, the corrosion rate of the carbon fiber composite grounding body 100 sample coated with the carbon fiber composite material protective layer 102 is much lower than the corrosion rate of the grounding body samples such as pure copper, copper-plated steel, carbon steel, and galvanized steel. It can be shown that the carbon fiber composite grounding body 100 of the embodiment of the present invention has obvious corrosion resistance in acidic, alkaline and high-salt soils, and has a longer service life.

[0102] Example 7

[0103] Based on the same inventive concept, Figure 1 , Figure 2 The carbon fiber composite grounding body 100 provided in the embodiment of the present invention comprises: a metal frame 101 and a carbon fiber composite material protective layer 102, wherein the carbon fiber composite material protective layer 102 is coated on the outer surface of the metal frame 101. The metal frame 101 includes but is not limited to copper, steel, copper-plated steel, carbon steel, galvanized steel, etc.; the carbon fiber composite material protective layer 102 includes but is not limited to the carbon fiber composite material protective layer 102 described in Embodiments 1 to 5.

[0104] Among them, this embodiment also provides a specific structure of a metal skeleton 101, and the metal skeleton 101 includes: a trunk 111 and at least one branch 112; a plurality of the branches 112 are distributed at intervals on both sides of the trunk 111.

[0105] In some preferred embodiments, the two branches 112 on both sides of the trunk 111 are connected to the same position of the trunk 111 and are symmetrically arranged about the trunk 111. The multiple branches 112 are connected to the trunk 111 to form a "fishbone" structure.

[0106] In some preferred embodiments, the branches 112 and the trunk 111 are arranged perpendicular to each other, and the branches 112 located on the same side of the trunk 111 are arranged in parallel.

[0107] In some preferred embodiments, the outer surfaces of the trunk 111 and the branch trunk 112 are provided with an anti-corrosion layer, which may be an anti-rust paint layer or a galvanized layer, or a double protective layer of an anti-rust paint layer and a galvanized layer.

[0108] In some preferred embodiments, the metal frame 101 further includes a connector 113, and one connector 113 is disposed at each end of the metal frame 101; a connection hole is disposed on the connector 113. The connectors 113 with connection holes are reserved at both ends of the metal frame 101 to facilitate connection and fixation with external devices.

[0109] Example 8

[0110] Figure 3 This is a schematic diagram of the overall structure of a mold for making a carbon fiber composite grounding body according to the present invention; Figure 4 The figure is a left-side structural schematic diagram of a mold for making a carbon fiber composite grounding body according to the present invention.

[0111] Based on the same inventive concept, Figure 3 , Figure 4 The embodiment of the present invention provides a mold for making a carbon fiber composite grounding body, the mold 200 includes: a bottom plate 201, a plurality of end plates 202 and a plurality of side sealing plates 203; the end plates 202 and the side sealing plates 203 are respectively arranged on the upper surface of the bottom plate 201, and are surrounded by the bottom plate 201 to form a cavity, and the carbon fiber composite grounding body 100 is accommodated in the cavity.

[0112] In some preferred embodiments, the mold 200 further includes: a plurality of partitions 204 disposed in the cavity; the partitions 204 divide the cavity into a plurality of sub-cavities 200a, each of which accommodates one carbon fiber composite grounding body 100. To facilitate the formation of the same size of the carbon fiber composite grounding body 100, the partitions 204 are disposed in parallel with the end plates 202, and each sub-cavity 200a has the same volume.

[0113] In some preferred embodiments, the side sealing plate 203 is arranged on one side of the end of the partition 204, and the side sealing plate 203 includes: an upper sealing plate 231 and a lower sealing plate 232 connected up and down; the bottom surface of the lower sealing plate 232 is fixedly connected to the upper surface of the bottom plate 201, and the left and right side surfaces of the lower sealing plate 232 are respectively fixedly connected to the end plate 202; the bottom surface of the upper sealing plate 231 is fitted and connected to the top surface of the lower sealing plate 232, and the left and right side surfaces of the upper sealing plate 231 are respectively fitted and connected to the end plate 202. The top surface of the lower sealing plate 232 is provided with a plurality of grooves 2321, and the bottom surface of the upper sealing plate 231 is provided with a plurality of convex grooves 2311. One of the grooves 2321 and one of the convex grooves 2311 are correspondingly connected to form a socket 203a, and one of the sockets 203a is correspondingly connected to one of the sub-cavities 200a, and the end of the metal skeleton 101 is plugged into the corresponding socket 203a. The socket 203a is used to plug in the end of the trunk 111 of the metal skeleton 101 to facilitate fixing the metal skeleton 101. The side sealing plate 203 is configured as two upper and lower sealing plates 231 and lower sealing plates 232 that are detachable and connected to each other, which is convenient for installation, fixing and demoulding. In some preferred embodiments, bolt holes can be set on the upper sealing plate 231, the lower sealing plate 232 and the metal skeleton 101, and fixed by bolt plugging.

[0114] Example 9

[0115] Figure 5 The present invention is a schematic diagram of an axial cross-sectional structure of a carbon fiber composite grounding body before demoulding.

[0116] Based on the same inventive concept, Figures 1 to 5 The embodiment of the present invention provides a method for manufacturing a carbon fiber composite grounding body, the method comprising:

[0117] S101: manufacturing a carbon fiber composite grounding body mold, wherein the mold has a cavity;

[0118] S102: manufacturing a metal skeleton, and placing the metal skeleton in the cavity with a gap between the metal skeleton and the cavity;

[0119] S103: preparing a carbon fiber composite material, and pouring the carbon fiber composite material into the gap to form a carbon fiber composite material protective layer covering the outside of the metal skeleton;

[0120] S104: demoulding and curing, that is, obtaining the carbon fiber composite grounding body.

[0121] In the above S101, the carbon fiber composite grounding body mold can be the mold 200 described in Example 8. The partition 204 divides the cavity of the mold 200 into multiple sub-cavities 200a, which can be used to place multiple metal skeletons 101 and simultaneously manufacture multiple carbon fiber composite grounding bodies 100. Before placing the metal skeletons 101, the upper sealing plate 231 of the mold 200 is removed.

[0122] In the above S102, the metal skeleton may adopt the metal skeleton 101 structure described in Example 7. The two ends of the trunk 111 of the metal skeleton 101 are respectively placed in the grooves 2321 of the lower sealing plate 232, and the upper sealing plate 231 is installed so that the protruding grooves 2311 and the grooves 2321 are correspondingly fitted to fix the ends of the trunk 111, wherein there are gaps between the trunk 111 and the branches 112 and the partition 204 and the bottom plate 201.

[0123] In the above S103 , the carbon fiber composite material may adopt the raw material composition and preparation method described in Examples 1 to 5. The carbon fiber composite material is poured into the gap of the mold 200 to form a carbon fiber composite material protective layer 102 covering the outside of the metal skeleton 101 .

[0124] In the above S104, the demoulding and curing specifically include: closing the mold 200 and performing high pressure compaction curing for 24 hours, and continuing curing for 28 to 30 days after demoulding, so as to obtain the carbon fiber composite grounding body 100.

[0125] The method for manufacturing a carbon fiber composite grounding body according to an embodiment of the present invention has a simple process flow and is easy to operate. The carbon fiber composite material is poured into a mold 200 equipped with a metal skeleton 101 in the form of a slurry. The carbon fiber composite material is in contact with the metal skeleton 101 from beginning to end during the solidification process, which increases the firmness of the combination between the two. The manufactured carbon fiber composite grounding body 100 has strong stability, ensuring that it has good resistance reduction characteristics and corrosion resistance.

[0126] The above are merely embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention are included in the scope of the claims of the present invention to be approved.

Claims

1. A carbon fiber composite grounding body, characterized in that: include: A metal skeleton (101) and a carbon fiber composite material protective layer (102) coated on the outer surface of the metal skeleton (101); the carbon fiber composite material protective layer (102) is made of a carbon fiber composite material; the raw material of the carbon fiber composite material comprises an anhydrous phase and an aqueous phase, and the anhydrous phase comprises the following components in terms of mass percentage: 30% to 40% Portland cement, 15% to 20% bentonite, 10% to 15% silica fume, 10% to 15% graphite, 1% to 5% carbon fiber, 5% to 10% stainless steel fiber and 1% to 5% polyacrylamide.

2. The carbon fiber composite grounding body according to claim 1, characterized in that: The carbon fiber composite material comprises the following components by mass percentage: 30% Portland cement, 20% bentonite, 15% silica fume, 15% graphite, 5% carbon fiber, 10% stainless steel fiber and 5% polyacrylamide.

3. The carbon fiber composite grounding body according to claim 1, characterized in that: The method for preparing the carbon fiber composite material comprises: Mixing silicate cement, silica fume, graphite, carbon fiber, stainless steel fiber and polyacrylamide in a certain proportion to obtain a mixture, adding water to the mixture, and stirring to obtain a first slurry; adding water to the bentonite to expand it, adding the expanded bentonite to the first slurry, and stirring to obtain a second slurry; Water is added to the second slurry, and the mixture is stirred to obtain the carbon fiber composite material.

4. The carbon fiber composite grounding body according to claim 3, characterized in that: The mass content of water added to the mixture is 2-5%.

5. The carbon fiber composite grounding body according to claim 3, characterized in that: The mass content of water added to the bentonite is 50-80%.

6. The carbon fiber composite grounding body according to claim 3, characterized in that: The water content added to the second slurry is 40-50% by weight.

7. The carbon fiber composite grounding body according to claim 3, characterized in that: In the step of adding the first aqueous phase to the mixture and stirring to obtain the first slurry, the stirring speed is 27 to 34 r / min and the stirring time is 10 to 15 min. In the step of adding the third aqueous phase to the second slurry and stirring to obtain the carbon fiber composite material, the stirring speed is 52 to 58 r / min and the stirring time is 5 to 10 min.

8. The carbon fiber composite grounding body according to any one of claims 1 to 7, characterized in that: The metal skeleton (101) comprises: a main trunk (111) and at least one branch trunk (112); a plurality of branch trunks (112) arranged at intervals are symmetrically distributed on both sides of the main trunk (111).

9. The carbon fiber composite grounding body according to claim 8, characterized in that: The branch trunk (112) and the main trunk (111) are arranged perpendicular to each other.

10. The carbon fiber composite grounding body according to claim 8, characterized in that: The branches (112) located on the same side of the main trunk (111) are arranged in parallel.

11. The carbon fiber composite grounding body according to claim 8, characterized in that: The outer surfaces of the main trunk (111) and the branch trunk (112) are both provided with an anti-corrosion layer.

12. The carbon fiber composite grounding body according to claim 11, characterized in that: The anti-corrosion layer includes: an anti-rust paint layer and / or a galvanized layer.

13. The carbon fiber composite grounding body according to claim 8, characterized in that: The metal frame (101) further comprises: a connecting piece (113), wherein one connecting piece (113) is respectively arranged at both ends of the metal frame (101); and a connecting hole is arranged on the connecting piece (113).

14. A mold for making the carbon fiber composite grounding body according to any one of claims 1 to 13, characterized in that: The mold (200) comprises: a bottom plate (201), a plurality of end plates (202) and a plurality of side sealing plates (203); the end plates (202) and the side sealing plates (203) are respectively arranged on the upper surface of the bottom plate (201), and are surrounded by the bottom plate (201) to form a cavity, and the carbon fiber composite grounding body is accommodated in the cavity.

15. The mold according to claim 14, characterized in that The mold (200) further comprises: a plurality of partitions (204) arranged in the cavity; the partitions (204) divide the cavity into a plurality of sub-cavities (200a), and each of the sub-cavities (200a) accommodates one of the carbon fiber composite grounding bodies.

16. The mold according to claim 15, characterized in that The partition plate (204) is arranged in parallel with the end plate (202).

17. The mold according to claim 15, characterized in that The side sealing plate (203) is arranged on one side of the end of the partition (204), and the side sealing plate (203) includes: an upper sealing plate (231) and a lower sealing plate (232) connected up and down; the bottom surface of the lower sealing plate (232) is fixedly connected to the upper surface of the bottom plate (201), and the left and right side surfaces of the lower sealing plate (232) are respectively fixedly connected to the end plate (202); the bottom surface of the upper sealing plate (231) is fitted and connected to the top surface of the lower sealing plate (232), and the left and right side surfaces of the upper sealing plate (231) are respectively fitted and connected to the end plate (202).

18. The mold according to claim 17, characterized in that The top surface of the lower sealing plate (232) is provided with a plurality of grooves (2321), and the bottom surface of the upper sealing plate (231) is provided with a plurality of convex grooves (2311); one of the grooves (2321) and one of the convex grooves (2311) are correspondingly fitted and connected to form a plug hole (203a); one of the plug holes (203a) is correspondingly connected to one of the sub-cavities (200a); and the end of the metal skeleton (101) is plugged into the corresponding plug hole (203a).

19. A method for manufacturing a carbon fiber composite grounding body according to any one of claims 1 to 13, characterized in that: The production method comprises: A mold (200) for making a carbon fiber composite grounding body, wherein the mold (200) has a cavity; Making a metal skeleton (101), and placing the metal skeleton (101) in the cavity with a gap between the metal skeleton (101) and the cavity; Making a carbon fiber composite material protective layer (102), preparing a carbon fiber composite material, and pouring the carbon fiber composite material into the gap to form a carbon fiber composite material protective layer (102) covering the outside of the metal skeleton (101); After demoulding and curing, the carbon fiber composite grounding body (100) is obtained.

Images