CN217173876U - Protection device for to stress corrosion is strutted to coal road anchor net - Google Patents
Protection device for to stress corrosion is strutted to coal road anchor net Download PDFInfo
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- CN217173876U CN217173876U CN202220421986.XU CN202220421986U CN217173876U CN 217173876 U CN217173876 U CN 217173876U CN 202220421986 U CN202220421986 U CN 202220421986U CN 217173876 U CN217173876 U CN 217173876U
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Abstract
The utility model provides a protection device to stress corrosion is strutted to coal road anchor net, include: anchor rods and anchor cables anchored into the coal rock as a cathodic protection object; the surface layer of the sacrificial anode is coated with a metal protective net plated with active metal or an active metal net clamped between the metal protective net and the coal rock; the metal protecting net is used for supporting the coal roadway anchor net, the reticular sacrificial anode is kept in close contact with the supported coal rock while the metal protecting net is used for providing a tensioning effect for the coal roadway anchor net, the reticular sacrificial anode, the anchor rod anchored into the coal rock and the anchor cable form a galvanic couple, and the anchor rod and the anchor cable are subjected to cathodic protection. The utility model discloses the use does not need to dig the netted sacrificial anode that buries, carries out cathodic protection to steel stock and the anchor rope in the anchor goes into the coal petrography, not only has anticorrosive construction simple and easy safety, is suitable for stock anchor rope stress corrosion protection, the convenient characteristics that detect the protecting effect, still has the ability that can automatically regulated electrochemistry protection output current, can exempt from to examine in a short time.
Description
Technical Field
The utility model belongs to the technical field of it is anticorrosive, particularly, relate to a protector to stress corrosion is strutted to coal road anchor net.
Background
The coal roadway anchor net support is an advanced active support technology for preventing roof fall, collapse and deformation damage of coal roadway surrounding rocks, and is the most main support technical means of the coal roadway support in China at present. The coal roadway anchor net supporting material comprises anchor rods and accessories (supporting plates, washers and nuts), anchor cables and accessories, resin anchoring agents, protecting nets, reinforcing steel bar joists, steel belts and the like, and all belong to stress parts, wherein the steel anchor rods and the anchor cables bear the largest tensile stress, and the high risk of stress corrosion cracking exists at the parts with serious corrosion such as top plate water spraying and the like. The technical specification of coal roadway anchor rod support (MT/T1104-2009) of the coal industry standard of the people's republic of China makes special regulations and requirements on the type specifications and tensile strength of steel anchor rods and anchor cables, but does not relate to the protection technology of stress corrosion of the steel anchor rods and the anchor cables.
Because the parts of the steel anchor rods and the anchor cables anchored in the coal rock stratum are difficult to perform anticorrosion treatment by adopting a method of coating anticorrosion paint or antirust oil, the sacrificial anode method cathode protection technology is usually considered to be selected to prevent stress corrosion fracture. However, the conventional method for protecting the cathode of the sacrificial anode needs to face a plurality of problems, the most prominent of which is the construction trouble and the safety risk existing in digging and burying the sacrificial anode at the arch or the side of the coal roadway.
Therefore, the research and design of the novel protective device which is simple and safe in corrosion prevention construction, can carry out cathodic protection on the steel anchor rods and the anchor cables anchored in the coal rock stratum without burying the sacrificial anode in the coal rock stratum and effectively inhibit the stress corrosion is an urgent need of coal mine safety production.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides a protection device to stress corrosion is strutted to coal road anchor net, the device be the simple and easy safety of construction, protective effect is good, be convenient for detect the sacrificial anode type cathodic protection device who maintains for steel stock and the anchor rope emergence stress corrosion fracture risk in the elimination anchor goes into the coal petrography.
In order to achieve the above purpose, the utility model adopts the following technical scheme: a protection device for coal road anchor net support stress corrosion includes:
anchor rods and anchor cables anchored into the coal rock as a cathodic protection object;
the surface layer of the sacrificial anode is coated with a metal protective net plated with active metal or an active metal net clamped between the metal protective net and the coal rock;
the metal protecting net is used for supporting the coal roadway anchor net, and the net-shaped sacrificial anode is kept in close contact with the supported coal rock while the metal protecting net is used for providing a tensioning effect for the coal roadway anchor net support, so that the net-shaped sacrificial anode, an anchor rod and an anchor rope anchored into the coal rock form a galvanic couple, and the anchor rod and the anchor rope are subjected to cathodic protection.
According to the utility model discloses a device, the metal protecting wire net is steel protecting wire net and/or iron protecting wire net.
According to the utility model discloses a device, the metal protecting wire net that coats with active metal is selected from galvanized steel protecting wire net and indisputable protecting wire net, aluminized steel protecting wire net and indisputable protecting wire net, coating rich zinc anticorrosive paint's in steel protecting wire net and the indisputable protecting wire net one or more.
According to the utility model discloses a device, the active metal net is selected from one or more in aluminium net, magnesium net, zinc net and almag net, aluminium-zinc alloy net, almag net made by aluminium, magnesium, zinc and alloy thereof.
According to the utility model discloses a device, stock and anchor rope are steel stock and steel anchor rope.
According to the utility model discloses a device, the net type of metal protecting wire net or active metal net is rhombus and rectangle, net twine diameter 1 ~ 6mm, mesh density 100 ~ 10000 per square metre.
According to the utility model discloses a device, the net type of metal protecting wire net or active metal net is rhombus and rectangle, and net twine diameter 2 ~ 3mm, mesh density 500 ~ 4000 per square metre.
According to the utility model discloses a device, through pretightning force and the electric conductivity of metal protecting wire net and coal road anchor net support component, make netted sacrificial anode keep in close contact with and with the direct electric conduction of stock anchor rope with coal road coal rock, carry out cathodic protection to steel stock and the steel anchor rope that the anchor goes into in the coal rock.
According to the utility model discloses a device, coal road anchor net support component includes reinforcing bar joist, steel band, stock layer board nut, anchor rope layer board nut etc..
According to the utility model discloses a device still includes voltmeter and reference electrode with stock electricity intercommunication.
The utility model provides a technical scheme has following beneficial effect:
the utility model discloses strut stress corrosion to the anchor net, the tensioning force that utilizes metal protecting net normal existence makes netted sacrificial anode keep in close contact with by the coal petrography of strutting, makes netted sacrificial anode and anchor go into steel stock and anchor rope constitution good galvanic couple in the coal petrography, carries out cathodic protection inhibition stress corrosion to the anchor stock anchor rope. The utility model discloses the use does not need to dig the netted sacrificial anode that buries, carries out cathodic protection to steel stock and anchor rope in the anchor goes into the coal petrography, not only has anticorrosive construction simple and easy safety, is suitable for stock anchor rope stress corrosion protection, the convenient characteristics that detect the protecting effect, still has the ability that can automatically regulated electrochemistry protection output current, can exempt from to examine in a short time, for example: under the environmental condition that the top plate water spraying position is corroded seriously, the contact conductivity of the reticular sacrificial anode and the moist coal rock is larger, and the cathodic protection current provided for the anchor rod and the anchor cable is also larger; on the contrary, under the environment condition of relatively light dry corrosion, the contact conductivity of the mesh sacrificial anode and the wet coal rock is low, and the cathodic protection current provided for the anchor rod and anchor cable is also low, so that the potential negative shift of the anchor rod and anchor cable can be stably kept at the appropriate 150-300 mV for a long time, and the occurrence of stress corrosion can be efficiently and durably inhibited.
Drawings
FIG. 1 is a schematic structural installation diagram of a protection device for supporting stress corrosion of a coal roadway anchor net;
FIG. 2 is a schematic structural installation diagram of another protection device for the stress corrosion of a coal roadway anchor net support;
the coal rock is marked as follows, namely coal rock (1), an active metal net (2), an anchor rod (3), a side metal protecting net (4), an anchor rod/anchor cable supporting plate nut (5), a supporting plate (6), an anchor cable (7), a top metal protecting net (8), a reference electrode (9) and a voltmeter (10); fig. 2 compares with fig. 1, the side metal protecting net (4) and the top metal protecting net (8) are replaced by an anode type protecting net (11).
Detailed Description
Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first position" and "second position" are two different positions.
Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "secured" are to be construed broadly and encompass, for example, both fixed and removable connections; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
The embodiment of the utility model provides a all kinds of lively metal mesh, metal protecting wire net, active cladding layer metal protecting wire net and rich zinc anticorrosive paint etc. that adopt all can obtain from the channel of selling on the market, do not limit the producer.
Example 1
The protection device for inhibiting the stress corrosion of the support of the anchor net of the coal roadway, which is characterized by clamping the active metal net (zinc net), comprises:
a steel anchor rod 3 and an anchor cable 7 anchored in the coal rock 1 as a cathodic protection object;
an active metal net 2 (zinc net in this embodiment) which is used as a netted sacrificial anode and is clamped between a metal protecting net (comprising a side metal protecting net 4 and a top metal protecting net 8, in this embodiment, an iron protecting net and a steel protecting net) and coal rock;
the side metal protecting net 4 and the top metal protecting net 8 are used for supporting the coal roadway anchor net, and when the side metal protecting net and the top metal protecting net are used for supporting the coal roadway anchor net to provide a tensioning effect, the active metal net 2 is kept in close contact with the supported coal rock 1, so that the active metal net 2, the anchor rod 3 anchored into the coal rock and the anchor cable 7 form a good galvanic couple, and the anchor rod and the anchor cable are subjected to cathodic protection.
When the device is installed, according to the structure diagram of the protection device shown in fig. 1, the anchor cable 7 and the anchor rod 3 are fastened, then the active metal net 2 is clamped between the side metal protecting net 4 and the coal roadway coal rock 1 and between the top metal protecting net 8 and the coal roadway coal rock 1, and by means of the pretightening force applied to the anchor net supporting members such as the side metal protecting net 4 or the top metal protecting net 8 and the anchor rod/anchor cable supporting plate nut 5 and the pretightening force and the conductivity of the conductive anchor net supporting members, the active metal net 2 is in close contact with the coal rock 1, the side metal protecting net 4 and the top metal protecting net 8 and is directly and electrically conducted with the anchor rod 3 and the anchor cable 7, and the steel anchor rod 3 and the anchor cable 7 anchored in the coal rock 1 are subjected to cathode protection; also included in the device are a voltmeter 10 and a reference electrode 9 in electrical communication with the anchor 7.
The main technical parameters of the zinc mesh are as follows:
chemical components: is high-purity zinc with the mass fraction of more than 99 percent,
the net shape and the preparation method are as follows: the diamond-shaped and the woven structure are adopted,
mesh density: 550 pieces/square meter;
diameter of the net wire: 2 mm.
The zinc mesh is used as a sacrificial anode, and the judgment mode of the protective effect of the anchor rod 3 and the anchor cable 7 is as follows: the potential negative displacement of the steel anchor cable 7 in 180 days after being communicated with the top metal protecting net 8 (steel protecting net) clamping the active metal splashing metal net 2 (zinc net) is 220-305 mV, the potential negative displacement of the steel anchor rod 3 in 180 days after being communicated with the side metal protecting net 4 (iron protecting net) clamping the active metal splashing metal net 2 (zinc net) is 205-295 mV, and the protection device has excellent cathodic protection capability on the steel anchor cable 7 and the anchor rod 3 and can effectively inhibit the occurrence of stress corrosion of the anchor rod 3 and the anchor cable 7.
This embodiment protector has avoided digging and burying the construction trouble and the safe risk that sacrificial anode exists through utilizing anchor net initiative to strut inherent pretightning force and electric conductivity, has still saved the loaded down with trivial details operation that electrochemical protection needs the wiring simultaneously, and is very practical to preventing that the stock anchor rope from taking place stress corrosion.
Example 2
Similar to the embodiment 1, the difference is that the active metal mesh 2 is an aluminum mesh, and the active metal mesh is sandwiched between a metal protecting mesh (including a side metal protecting mesh 4 and a top metal protecting mesh 8, in this embodiment, an iron protecting mesh and a steel protecting mesh) and the coal rock 1 as a mesh sacrificial anode, and the main technical parameters of the aluminum mesh are as follows:
chemical components: is high-purity aluminum with the mass fraction of more than 99 percent,
the net shape and the preparation method are as follows: the shape of the rectangle is woven,
mesh density: 1000 per square meter;
diameter of the net wire: 3 mm.
The aluminum mesh is used as a sacrificial anode to judge the protection effect of the anchor rod and the anchor cable in the following modes: the potential negative displacement of the steel anchor cable 7 within 180 days of being communicated with the top metal protecting net 8 for clamping and releasing the aluminum net is 160-270 mV, and the potential negative displacement of the steel anchor rod 3 within 180 days of being communicated with the side metal protecting net 4 for clamping and releasing the aluminum net is 155-250 mV, so that the protection device has excellent cathodic protection capacity on the steel anchor cable 7 and the anchor rod 3, and can effectively inhibit the occurrence of stress corrosion of the anchor rod and the anchor cable.
Example 3
The embodiment of the invention relates to a novel protection device for inhibiting the stress corrosion of a coal roadway anchor net support, which is characterized by installing an anode type protection net (galvanized steel protection net), and comprises the following components:
an anchor rod 3 and an anchor cable 7 anchored in the coal rock as a cathodic protection object;
an anode type protecting net 11 (galvanized steel protecting net) as a mesh sacrificial anode to replace the conventional metal protecting net;
the galvanized steel protecting net is used for supporting a coal roadway anchor net, keeps close contact with a supported coal rock 1 while providing a tensioning effect when being used for supporting the coal roadway anchor net, forms a galvanic couple with an anchor rod 3 and an anchor rope 7 which are anchored into the coal rock to carry out cathodic protection on the anchor rod 3 and the anchor rope 7, and further comprises a voltmeter 10 and a reference electrode 9 which are electrically communicated with the anchor rod 7.
When the device of the embodiment is installed, according to the structure diagram of the protection device shown in fig. 2, an anode type protecting net 11 (galvanized steel protecting net) with both tensile property of the metal protecting net and reticular sacrificial anode property is used for replacing a common metal protecting net (such as a steel protecting net), then construction and installation are carried out according to a normal coal roadway anchor net supporting construction method, the galvanized steel protecting net is kept in close contact with coal roadway coal rock and is directly and electrically communicated with an anchor rod and an anchor rope by virtue of the pretightening force and the electric conductivity of the galvanized steel protecting net and the coal roadway anchor net supporting member, and the steel anchor rod and the anchor rope anchored in the coal rock are subjected to cathode protection. The main technical parameters of the galvanized steel protecting net are as follows:
the chemical components of the coating in the galvanized steel protective net are high-purity zinc with the mass fraction of more than 99 percent;
the net shape and the preparation method are as follows: the diamond-shaped and the woven structure are adopted,
mesh density: 550 pieces per square meter;
diameter of the net wire: 3 mm.
The galvanized steel protecting net is used as a sacrificial anode to judge the protection effect of the anchor rod 3 and the anchor cable 7 in the following mode: the potential negative displacement of the steel anchor cable 7 in 180 days using the galvanized steel protecting net is 190-295 mV, the potential negative displacement of the steel anchor rod 3 in 180 days using the galvanized steel protecting net is 185-290 mV, and the protection device has good cathodic protection capability on the steel anchor cable 7 and the anchor rod 3 and can effectively inhibit the occurrence of stress corrosion of the anchor rod 3 and the anchor cable 7.
Example 4
The embodiment is similar to the embodiment 3, except that an anode type protecting net 11 (a steel protecting net coated with zinc-rich paint) is used for replacing a common metal protecting net, then construction and installation are carried out according to a normal coal roadway anchor net supporting construction method, the steel protecting net coated with zinc-rich paint is kept in close contact with coal roadway coal rock 1 and is directly and electrically communicated with an anchor rod and an anchor cable by virtue of the pretightening force and the electric conductivity of the steel protecting net coated with zinc-rich paint and a coal roadway anchor net supporting member, and a steel anchor rod 3 and an anchor cable 7 anchored in the coal rock are subjected to cathode protection. The steel protecting net coated with the zinc-rich coating has the main technical parameters that:
coating properties: the zinc powder mass fraction is more than 50 percent of the inorganic zinc-rich coating;
the net shape and the preparation method are as follows: rectangular and welding;
mesh density: 300 per square meter;
diameter of the net wire: 5 mm.
The judgment mode of the protective effect of the steel protective net coated with the zinc-rich coating on the anchor rod 3 and the anchor cable 7 as a sacrificial anode is as follows: the potential negative displacement of the steel anchor rope 7 in 120 days when the steel protecting net coated with the zinc-rich coating is used is 170-275 mV, and the potential negative displacement of the steel anchor rod 3 in 120 days when the steel protecting net coated with the zinc-rich coating is used is 165-260 mV, so that the protection device has good cathodic protection capability on the steel anchor rope 7 and the anchor rod 3, and can effectively inhibit the occurrence of stress corrosion of the anchor rod 3 and the anchor rope 7.
This embodiment protector is used for preventing stock anchor rope stress corrosion, has not only avoided digging the construction trouble and the safety risk that bury sacrificial anode existence equally to saved the loaded down with trivial details operation that electrochemical protection needs the wiring, can make its function that produces netted sacrificial anode through the mode of scribbling rich zinc coating to the metal protecting wire net in the anchor net is strutted with, it is more practical to prevent that stock anchor rope from taking place stress corrosion.
It will be appreciated by those skilled in the art that certain modifications or adaptations to the invention may be made in light of the teaching of this specification. Such modifications or adaptations are intended to be within the scope of the present invention as defined by the claims.
Claims (10)
1. The utility model provides a protector to stress corrosion is strutted to coal road anchor net which characterized in that: the method comprises the following steps:
anchor rods and anchor cables anchored into the coal rock as a cathodic protection object;
the surface layer of the sacrificial anode is coated with a metal protective net plated with active metal or an active metal net clamped between the metal protective net and the coal rock;
the metal protecting net is used for supporting the coal roadway anchor net, the reticular sacrificial anode is kept in close contact with the supported coal rock while the metal protecting net is used for providing a tensioning effect for the coal roadway anchor net, the reticular sacrificial anode, the anchor rod anchored into the coal rock and the anchor cable form a galvanic couple, and the anchor rod and the anchor cable are subjected to cathodic protection.
2. The protection device for the stress corrosion of the coal roadway anchor net support according to claim 1, is characterized in that: the metal protecting net is a steel protecting net and/or an iron protecting net.
3. The protection device for the stress corrosion of the coal roadway anchor net support according to claim 1 or 2, wherein: the metal protecting net coated with active metal is one or more of galvanized steel protecting net and iron protecting net, aluminized steel protecting net and iron protecting net, and steel protecting net and iron protecting net coated with zinc-rich anticorrosive paint.
4. The protection device for the stress corrosion of the coal roadway anchor net support according to claim 1, is characterized in that: the active metal net is selected from one or more of aluminum net, magnesium net, zinc net and aluminum magnesium alloy net, aluminum zinc alloy net and aluminum magnesium zinc alloy net.
5. The protection device for the stress corrosion of the coal roadway anchor net support according to claim 1, is characterized in that: the anchor rod and the anchor cable are steel anchor rods and steel anchor cables.
6. The protection device for the stress corrosion of the coal roadway anchor net support according to claim 1, wherein: the net shape of the metal protecting net or the active metal net is rhombic or rectangular, the diameter of a net wire is 1-6 mm, and the mesh density is 100-10000 meshes per square meter.
7. The protection device for the stress corrosion of the coal roadway anchor net support according to claim 6, is characterized in that: the diameter of the metal protecting net or the active metal net is 2-3 mm, and the mesh density is 500-4000 meshes per square meter.
8. The protection device for the stress corrosion of the coal roadway anchor net support according to claim 1, is characterized in that: the net-shaped sacrificial anode is kept in close contact with coal rock of the coal roadway and is directly and electrically communicated with the anchor rod and the anchor cable through the pretightening force and the electric conductivity of the metal protecting net and the supporting member of the anchor net of the coal roadway, and the anchor rod and the anchor cable anchored into the coal rock are subjected to cathodic protection.
9. The protection device for the stress corrosion of the coal roadway anchor net support according to claim 8, wherein: the coal roadway anchor net supporting component comprises a steel bar joist, a steel belt, an anchor rod supporting plate nut and an anchor cable supporting plate nut.
10. The protection device for the stress corrosion of the coal roadway anchor net support according to claim 1, is characterized in that: and a voltmeter and a reference electrode which are electrically communicated with the anchor rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220421986.XU CN217173876U (en) | 2022-02-28 | 2022-02-28 | Protection device for to stress corrosion is strutted to coal road anchor net |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220421986.XU CN217173876U (en) | 2022-02-28 | 2022-02-28 | Protection device for to stress corrosion is strutted to coal road anchor net |
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| Publication Number | Publication Date |
|---|---|
| CN217173876U true CN217173876U (en) | 2022-08-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220421986.XU Active CN217173876U (en) | 2022-02-28 | 2022-02-28 | Protection device for to stress corrosion is strutted to coal road anchor net |
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| CN (1) | CN217173876U (en) |
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- 2022-02-28 CN CN202220421986.XU patent/CN217173876U/en active Active
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