CN111883904A - Mining explosion-proof wireless antenna leading-in device and installation method thereof - Google Patents
Mining explosion-proof wireless antenna leading-in device and installation method thereof Download PDFInfo
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- CN111883904A CN111883904A CN202010871899.XA CN202010871899A CN111883904A CN 111883904 A CN111883904 A CN 111883904A CN 202010871899 A CN202010871899 A CN 202010871899A CN 111883904 A CN111883904 A CN 111883904A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
- G01M13/005—Sealing rings
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/30—Investigating strength properties of solid materials by application of mechanical stress by applying a single impulsive force, e.g. by falling weight
- G01N3/313—Investigating strength properties of solid materials by application of mechanical stress by applying a single impulsive force, e.g. by falling weight generated by explosives
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/02—Arrangements for de-icing; Arrangements for drying-out ; Arrangements for cooling; Arrangements for preventing corrosion
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K5/00—Casings, cabinets or drawers for electric apparatus
- H05K5/06—Hermetically-sealed casings
- H05K5/064—Hermetically-sealed casings sealed by potting, e.g. waterproof resin poured in a rigid casing
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K5/00—Casings, cabinets or drawers for electric apparatus
- H05K5/06—Hermetically-sealed casings
- H05K5/069—Other details of the casing, e.g. wall structure, passage for a connector, a cable, a shaft
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Abstract
The invention discloses a mining explosion-proof wireless antenna leading-in device and an installation method thereof, wherein the device comprises an explosion-proof sleeve and a sealing pressing piece, a radio-frequency cable penetrates through the sealing pressing piece, an explosion-proof shell and the explosion-proof sleeve, the explosion-proof sleeve comprises an explosion-proof outer sleeve and an explosion-proof inner sleeve, and the explosion-proof inner sleeve and the explosion-proof outer sleeve are in explosion-proof threaded connection; the sealing pressing piece comprises a pressure plate, a sealing cylinder and a sealing gasket, the pressure plate, the sealing cylinder and the sealing gasket extend into the flameproof shell, the radio-frequency cable sequentially penetrates through the pressure plate, the sealing cylinder, the sealing gasket, the flameproof shell and the flameproof inner sleeve, and epoxy resin is filled between the radio-frequency cable and the flameproof inner sleeve; the method comprises the following steps: firstly, testing an explosion-proof outer sleeve and an explosion-proof inner sleeve; secondly, testing the sealing pressing piece; thirdly, testing the explosion-proof shell; fourthly, installing the explosion-proof sleeve, the sealing pressing piece and the radio frequency cable; and fifthly, testing the wireless antenna lead-in device. The invention ensures safe and reliable wireless operation and is suitable for mining explosion-proof equipment.
Description
Technical Field
The invention belongs to the technical field of explosion-proof equipment, and particularly relates to a mining explosion-proof wireless antenna lead-in device and an installation method thereof.
Background
Along with the development of coal mine equipment, in order to improve the reliability and safety of the coal mine equipment, more and more coal mine equipment adopts a wireless control device to realize a wireless control function and telemeter coal mine mechanical operation parameters and fault states.
Currently, the following two types of signal transmitting (receiving) apparatuses are generally used: one is to place the signal receiving and transmitting antenna at the inner wall of the flameproof shell, and although the antenna is not easy to be damaged by the outside, the signal intensity attenuation of the receiving and transmitting antenna is very serious due to the shielding effect of the flameproof shell, so that the operable distance is greatly shortened. In addition, signals are transmitted through a through-wall terminal connected with the mining explosion-proof shell and the wiring cavity, and due to the fact that other control lines generally exist in the through-wall terminal, the wireless signals of the receiving and transmitting antenna are easily affected. Therefore, the mining explosion-proof wireless antenna introducing device and the installation method thereof are urgently needed, the signal attenuation of the wireless antenna is reduced, the receiving and transmitting distance of wireless signals is increased, the wireless operation is safe and reliable, the service life is long, the installation is convenient and fast, and the maintenance is convenient.
Disclosure of Invention
The technical problem to be solved by the invention is to provide the mining explosion-proof wireless antenna introducing device aiming at the defects in the prior art, the design is reasonable, the signal attenuation of the wireless antenna is reduced, the receiving and transmitting distance of wireless signals is improved, the wireless operation is ensured to be safe and reliable, the service life is long, the installation is convenient, and the mining explosion-proof wireless antenna introducing device can be adapted to mining explosion-proof equipment.
In order to solve the technical problems, the invention adopts the technical scheme that: the mining flame-proof type wireless antenna introducing device is characterized in that: the radio frequency cable penetrates through the flameproof sleeve, the flameproof shell and the sealing pressing piece, the flameproof sleeve comprises a flameproof outer sleeve arranged on the inner side of the flameproof shell and a flameproof inner sleeve arranged in the flameproof outer sleeve, and the flameproof inner sleeve and the flameproof outer sleeve are in flameproof threaded connection;
the sealing and compressing piece comprises a pressure plate, a sealing cylinder and a sealing gasket which are sequentially arranged from outside to inside, the sealing cylinder and the sealing gasket both extend into the flameproof shell, the radio-frequency cable sequentially penetrates through the flameproof inner sleeve, the flameproof shell, the sealing gasket, the sealing cylinder and the pressure plate, and epoxy resin is filled between the radio-frequency cable and the flameproof inner sleeve.
The mining flame-proof type wireless antenna introducing device is characterized in that: the explosion-proof shell is provided with a step hole, the step hole comprises a first through hole and a second through hole communicated with the first through hole, the inner diameter of the first through hole is larger than that of the second through hole, the sealing cylinder and the sealing gasket are located in the first through hole, the sealing gasket is in contact with the inside of the bottom of the first through hole, and the outer side wall of the sealing cylinder and the outer side wall of the sealing gasket are in contact with the inner side wall of the first through hole.
The mining flame-proof type wireless antenna introducing device is characterized in that: the explosion-proof inner sleeve is provided with a wiring through hole, the wiring through hole comprises a first through hole section, a second through hole section and a third through hole section which are sequentially communicated, the inner diameters of the first through hole section, the second through hole section and the third through hole section are gradually reduced, a plurality of annular grooves are arranged in the explosion-proof inner sleeve, the annular grooves are located in the second through hole section, a baffle ring is arranged at the joint of the second through hole section and the third through hole section, a limiting boss is arranged at the end part of the outer side wall of the explosion-proof inner sleeve, and the radio-frequency cable penetrates through the baffle ring.
The mining flame-proof type wireless antenna introducing device is characterized in that: the outer side wall of the explosion-proof jacket is sleeved with an anti-loosening sheet, and the anti-loosening sheet is positioned between the limiting boss and the end part of the explosion-proof jacket;
the outer side wall of the explosion-proof inner sleeve is provided with an outer explosion-proof thread, the inner side wall of the explosion-proof outer sleeve is provided with an inner explosion-proof thread, and the outer explosion-proof thread is matched with the inner explosion-proof thread.
The mining flame-proof type wireless antenna introducing device is characterized in that: the flameproof outer sleeve comprises a horizontal installation part and a cylindrical part which is integrally formed with the horizontal installation part and is vertically arranged, the horizontal installation part is integrally connected with the flameproof shell through a first bolt, and the inner flameproof thread is positioned on the inner side wall of the cylindrical part;
the pressure plate comprises a pressure cover and a boss which is integrally formed with the pressure cover and is vertically arranged, the end part of the boss extends into the first through hole, the end part of the boss is attached to the sealing barrel, and a wire passing hole for a radio frequency cable to pass through is formed in the pressure cover and the boss;
the pressure cover is provided with a fixing hole for a second bolt to pass through, and the second bolt connects the pressure plate and the flameproof shell into a whole.
The mining flame-proof type wireless antenna introducing device is characterized in that: the end part of the radio frequency cable, which is positioned outside the explosion-proof outer sleeve, is sleeved with a flexible rubber sleeve, and the length of the flexible rubber sleeve is not less than 1700 mm.
The mining flame-proof type wireless antenna introducing device is characterized in that: the sealing cylinder is a nitrile rubber sealing cylinder, and a BNC joint is arranged at the end part of the radio frequency cable positioned in the explosion-proof jacket;
the anti-loosening piece comprises a sleeve ring part and two vertical parts symmetrically arranged on the sleeve ring part, two first plane parts symmetrically arranged are arranged on the outer side wall of the end part of the explosion-proof inner sleeve, and the vertical parts are attached to the first plane parts;
and the horizontal mounting part of the explosion-proof jacket is provided with two second plane parts which are symmetrically distributed.
Meanwhile, the invention also discloses a method for installing the mining explosion-proof wireless antenna lead-in device, which has the advantages of simple steps, reasonable design, convenient implementation and good use effect, and is characterized by comprising the following steps:
step one, testing the explosion-proof outer sleeve and the explosion-proof inner sleeve:
101, testing the explosion-proof outer sleeve and the explosion-proof inner sleeve for 28 days at the temperature of 80 ℃ and the relative humidity of 90%;
102, standing the explosion-proof outer sleeve and the explosion-proof inner sleeve for 24 hours at room temperature;
103, testing the explosion-proof outer sleeve and the explosion-proof inner sleeve for 28 days at the temperature of-30 ℃ and the relative humidity of 90%, wherein the explosion-proof outer sleeve and the explosion-proof inner sleeve are intact, and the explosion-proof outer sleeve and the explosion-proof inner sleeve are qualified;
step two, testing the sealing pressing piece:
step 201, testing the pressure plate according to the method from step 101 to step 103 until the pressure plate is qualified;
202, testing the sealing cylinder and the sealing gasket for 28 days at the temperature of 95 ℃ and the relative humidity of 93%;
step 203, testing the sealing cylinder and the sealing gasket for 24 hours at the temperature of minus 25 ℃;
step 204, placing the sealing cylinder and the sealing gasket in No. 2 oil at the temperature of 50 ℃ for 24 hours, wiping the sealing cylinder and the sealing gasket, and standing for 24 hours at room temperature, wherein the sealing cylinder and the sealing gasket are intact, and the sealing cylinder and the sealing gasket are qualified;
step three, testing the flameproof shell:
step 301, impacting the explosion-proof shell by using a 1kg heavy hammer at the temperature of 22.7 ℃, wherein the explosion-proof shell is intact;
302, carrying out primary test on the explosion-proof shell in a methane air mixing environment with the methane volume concentration of 9.3% -10.3% and the pressure of 0-0.416 MPa;
303, carrying out secondary test on the explosion-proof shell in a methane air mixing environment with the methane volume concentration of 9.3-10.3% and the pressure of 0.060 MPa-0.636 MPa;
step 304, filling mixed gas of hydrogen and air inside and outside the explosion-proof shell, wherein the volume concentration of the hydrogen is 54.5-55.5%, igniting the hydrogen in the explosion-proof shell under atmospheric pressure, and if the explosion-proof shell is not propagated, indicating that the explosion-proof shell is qualified;
fourthly, installing the explosion-proof sleeve, the sealing pressing piece and the radio frequency cable:
step 401, installing an explosion-proof outer sleeve on the inner side of an explosion-proof shell;
step 402, installing the explosion-proof inner sleeve in the explosion-proof outer sleeve, and enabling the end part of the radio-frequency cable extending out of the explosion-proof inner sleeve to penetrate through a first through hole and a second through hole in the explosion-proof shell;
step 403, sequentially sleeving a sealing gasket, a sealing cylinder and a pressure plate on the outer end of the radio-frequency cable extending out of the flameproof shell, and extending the sealing cylinder and the sealing gasket into the second through hole until the sealing gasket is contacted with the bottom of the first through hole; the outer side walls of the sealing cylinder and the sealing gasket are both contacted with the inner side wall of the first through hole;
step 404, a second bolt penetrates through a fixing hole in the gland to connect the pressure plate and the explosion-proof shell into a whole;
step five, testing the wireless antenna lead-in device:
step 501, applying 140N-180N of pulling force to the radio frequency cable, keeping for 6h, and when the displacement of the radio frequency cable is not more than 6mm and the first bolt and the second bolt are not loosened, testing the pulling force of the radio frequency cable to be qualified;
and 502, when 2000kPa pressure is applied to the air filled in the explosion-proof shell, keeping for 10s, and if no leakage occurs at the installation position of the radio frequency cable, the wireless antenna introducing device is qualified to meet the requirement of mining explosion-proof.
The installation method of the mining explosion-proof wireless antenna lead-in device is characterized by comprising the following steps: in step 402, the explosion-proof inner sleeve is arranged in the explosion-proof outer sleeve, and the specific process is as follows:
step 4021, mounting a baffle ring at the end part of the explosion-proof inner sleeve, and penetrating one end of the radio frequency cable through the explosion-proof inner sleeve and the baffle ring;
step 4022, pouring epoxy resin between the radio frequency cable and the explosion-proof inner sleeve until the surface of the epoxy resin is flush with the end part of the explosion-proof inner sleeve;
step 4023, curing the explosion-proof inner sleeve filled with the epoxy resin at room temperature for 7-10 days;
step 4024, installing the explosion-proof inner sleeve in the explosion-proof outer sleeve.
The installation method of the mining explosion-proof wireless antenna lead-in device is characterized by comprising the following steps: after step 404 is completed, the following steps are also performed:
step 405, installing a BNC connector at the end part of the radio frequency cable in the explosion-proof shell;
406, arranging a flexible rubber sleeve at the end part of the radio frequency cable outside the explosion-proof shell; wherein, the length of the flexible rubber sleeve is not less than 1700 mm.
Compared with the prior art, the invention has the following advantages:
1. simple structure, reasonable in design and simple and convenient, long service life are laid in the installation.
2. The invention is provided with the explosion-proof outer sleeve and the explosion-proof inner sleeve, on one hand, the explosion-proof outer sleeve and the explosion-proof inner sleeve are connected through the explosion-proof thread, thereby realizing the thread explosion-proof; on the other hand, an independent explosion-proof wiring cavity is formed in the explosion-proof inner sleeve, so that the filling of epoxy resin and the penetration of a radio frequency cable are facilitated, the effective explosion-proof of the wireless antenna leading-in device is realized, and the wireless antenna leading-in device is suitable for mining explosion-proof equipment.
3. The radio frequency cable adopted by the invention sequentially passes through the explosion-proof sleeve, the explosion-proof shell and the sealing pressing piece, so that the end part of the radio frequency cable in the explosion-proof shell is provided with a BNC connector, which is convenient for transmitting a wireless signal to a wireless signal receiving port of a wireless receiving device in the explosion-proof shell; the end part of the radio frequency cable, which is positioned outside the explosion-proof shell, is provided with a flexible rubber sleeve, so that a wireless antenna is formed; in addition, the shielding layer of the radio frequency cable is not damaged, the signal attenuation of the wireless antenna is reduced, the receiving and transmitting distance of wireless signals is increased, and the anti-interference capability of the wireless lead-in device is improved.
4. Epoxy resin is filled between the radio frequency cable and the explosion-proof inner sleeve, on one hand, the radio frequency cable can be fixed after the epoxy resin is cured, and therefore the radio frequency cable can meet the requirement of a tension test by matching with a sealing pressing piece; on the other hand, the epoxy resin has low shrinkage during curing, generates small internal stress, improves the adhesion strength on the radio frequency cable, and has the characteristics of alkali resistance, acid resistance, solvent resistance, heat resistance, high dielectric property, surface leakage resistance, electric arc resistance and the like after being cured.
5. The sealing pressing piece comprises a pressure plate, a sealing cylinder and a sealing gasket, the pressure plate, the sealing cylinder and the sealing gasket extend into the flameproof shell, and the pressure plate is connected with the outer side surface of the flameproof shell to seal and press the radio frequency cable, so that the radio frequency cable is not easy to loosen, the lead-in device is enabled to always press the sealing cylinder, the sealing cylinder is ensured to hold the cable tightly, and the flameproof effect is stable.
6. According to the invention, the sealing cylinder and the sealing gasket are arranged, and the end surface of the sealing cylinder is supported by the sealing gasket, so that the thrust of the pressure plate can be fully transmitted to the sealing cylinder, the deformation of the sealing cylinder is uniform, the damage of the sealing cylinder can be avoided, and the sealing cylinder is ensured to be attached to the inner side wall of the through hole in the flameproof shell, so that a radio frequency cable is tightly held, and the flameproof sealing effect is improved.
7. The installation method of the mining explosion-proof wireless antenna lead-in device is convenient to operate, good in using effect, safe and reliable in wireless operation and suitable for mining explosion-proof equipment.
8. The installation method of the mining explosion-proof wireless antenna lead-in device comprises the steps of firstly testing the explosion-proof outer sleeve and the explosion-proof inner sleeve, secondly testing the sealing pressing piece, then testing the explosion-proof shell, then installing the explosion-proof sleeve, the sealing pressing piece and the radio frequency cable on the explosion-proof shell, and testing the wireless antenna lead-in device after the installation is finished, so that the characteristic of the mining explosion-proof wireless antenna lead-in device is ensured to meet the requirement of mining explosion-proof.
In conclusion, the wireless explosion-proof device is reasonable in design, the signal attenuation of the wireless antenna is reduced, the receiving and transmitting distance of wireless signals is increased, the safety and reliability of wireless operation are guaranteed, the service life is long, the installation is convenient and fast, and the wireless explosion-proof device is suitable for mining explosion-proof equipment.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
FIG. 1 is a schematic structural diagram of a mining explosion-proof wireless antenna lead-in device.
FIG. 2 is a schematic structural diagram of a pressure plate of the mining explosion-proof wireless antenna lead-in device.
FIG. 3 is a schematic structural diagram of an explosion-proof inner sleeve of the mining explosion-proof wireless antenna lead-in device.
FIG. 4 is a schematic position diagram of an explosion-proof outer sleeve, an explosion-proof inner sleeve and an anti-loosening sheet of the mining explosion-proof wireless antenna introducing device.
FIG. 5 is a schematic structural diagram of an anti-loosening sheet of the mining explosion-proof wireless antenna lead-in device.
FIG. 6 is a flow chart of an installation method of the mining explosion-proof wireless antenna lead-in device.
Description of reference numerals:
1-explosion-proof jacket; 1-horizontal mounting section; 1-2-cylindrical part;
1-3-first bolt; 1-4-a second planar portion; 2, an explosion-proof inner sleeve;
2-1-external explosion-proof thread; 2-2 — a first via section; 2-3-ring groove;
2-4-a second via section; 2-5-limiting boss; 2-6-baffle ring;
2-7-a third through-hole section; 2-8-a first planar portion;
3-anti-loosening sheet; 3-1-collar portion; 3-2-vertical section;
4-radio frequency cable; 5-epoxy resin; 6, sealing and pressing the parts;
6-1-gland; 6-1-wire through hole; 6-1-2-fixed holes;
6-2-sealing cylinder; 6-3-a gasket; 6-4-second bolt;
6-5-boss; 7, a flexible rubber sleeve; 7-1-frustum end;
7-2-rounded end; 10-explosion-proof shell; 10-1 — a first via;
10-2 — second via.
Detailed Description
The mining explosion-proof wireless antenna leading-in device comprises an explosion-proof sleeve arranged on the inner side of an explosion-proof shell 10 and a sealing pressing piece 6 arranged on the outer side of the explosion-proof shell 10, wherein a radio-frequency cable 4 penetrates through the explosion-proof sleeve, the explosion-proof shell 10 and the sealing pressing piece 6, the explosion-proof sleeve comprises an explosion-proof outer sleeve 1 arranged on the inner side of the explosion-proof shell 10 and an explosion-proof inner sleeve 2 arranged in the explosion-proof outer sleeve 1, and the explosion-proof inner sleeve 2 is in explosion-proof threaded connection with the explosion-proof outer sleeve 1;
the sealing and compressing member 6 comprises a pressure plate, a sealing cylinder 6-2 and a sealing gasket 6-3 which are sequentially arranged from outside to inside, the sealing cylinder 6-2 and the sealing gasket 6-3 extend into the flameproof shell 10, the radio-frequency cable 4 sequentially penetrates through the flameproof inner sleeve 2, the flameproof shell 10, the sealing gasket 6-3, the sealing cylinder 6-2 and the pressure plate, and epoxy resin 5 is filled between the radio-frequency cable 4 and the flameproof inner sleeve 2.
In the embodiment, the explosion-proof shell 10 is provided with a step hole, the step hole comprises a first through hole 10-1 and a second through hole 10-2 communicated with the first through hole 10-1, the inner diameter of the first through hole 10-1 is larger than that of the second through hole 10-2, the sealing cylinder 6-2 and the sealing gasket 6-3 are located in the first through hole 10-1, the sealing gasket 6-3 is in contact with the bottom of the first through hole 10-1, and the outer side walls of the sealing cylinder 6-2 and the sealing gasket 6-3 are in contact with the inner side wall of the first through hole 10-1.
As shown in fig. 3, in this embodiment, a wiring through hole is formed in the flameproof inner sleeve 2, the wiring through hole includes a first through hole section 2-2, a second through hole section 2-4 and a third through hole section 2-7 which are sequentially communicated, inner diameters of the first through hole section 2-2, the second through hole section 2-4 and the third through hole section 2-7 are gradually reduced, a plurality of annular grooves 2-3 are formed in the flameproof inner sleeve 2, the annular grooves 2-3 are located in the second through hole section 2-4, a baffle ring 2-6 is installed at a joint of the second through hole section 2-4 and the third through hole section 2-7, a limiting boss 2-5 is arranged at an end portion of an outer side wall of the flameproof inner sleeve 2, and the radio frequency cable 4 penetrates through the baffle ring 2-6.
As shown in fig. 4, in this embodiment, an anti-loosening sheet 3 is sleeved on the outer side wall of the flameproof jacket 1, and the anti-loosening sheet 3 is located between the limiting boss 2-5 and the end of the flameproof jacket 1;
the outer side wall of the explosion-proof inner sleeve 2 is provided with an outer explosion-proof thread 2-1, the inner side wall of the explosion-proof outer sleeve 1 is provided with an inner explosion-proof thread, and the outer explosion-proof thread 2-1 is matched with the inner explosion-proof thread.
As shown in fig. 2, in this embodiment, the flameproof housing 1 includes a horizontal installation portion 1-1 and a cylindrical portion 1-2 which is integrally formed with the horizontal installation portion 1-1 and vertically arranged, the horizontal installation portion 1-1 is connected with the flameproof housing 10 into a whole through a first bolt 1-3, and the inner flameproof thread is located on the inner side wall of the cylindrical portion 1-2;
the pressing plate comprises a pressing cover 6-1 and a boss 6-5 which is integrally formed with the pressing cover 6-1 and vertically arranged, the end part of the boss 6-5 extends into the first through hole 10-1, the end part of the boss 6-5 is attached to the sealing barrel 6-2, and a wire passing hole 6-1-1 for a radio frequency cable 4 to pass through is formed in the pressing cover 6-1 and the boss 6-5;
the gland 6-1 is provided with a fixing hole 6-1-2 for a second bolt 6-4 to pass through, and the second bolt 6-4 connects the pressure plate and the flameproof shell 10 into a whole.
In this embodiment, the end portion, located outside the flameproof outer sleeve 1, of the radio frequency cable 4 is sleeved with a flexible rubber sleeve 7, and the length of the flexible rubber sleeve 7 is not less than 1700 mm.
In the embodiment, the sealing cylinder 6-2 is a nitrile rubber sealing cylinder, and the end of the radio frequency cable 4 in the flameproof outer sleeve 1 is provided with a BNC connector;
as shown in fig. 5, the anti-loosening piece 3 comprises a collar portion 3-1 and two vertical portions 3-2 symmetrically arranged on the collar portion 3-1, two first plane portions 2-8 symmetrically arranged are arranged on the outer side wall of the end portion of the explosion-proof inner sleeve 2, and the vertical portions 3-2 are attached to the first plane portions 2-8;
and two second plane parts 1-4 which are symmetrically distributed are arranged on the horizontal mounting part 1-1 of the explosion-proof jacket 1.
In this embodiment, the sealing cylinder 6-2 is a nitrile rubber sealing cylinder, and the shore hardness of the sealing cylinder 6-2 is 45 ° to 55 °.
In the embodiment, the explosion-proof outer sleeve 1 and the explosion-proof inner sleeve 2 are arranged, on one hand, the explosion-proof outer sleeve 1 and the explosion-proof inner sleeve 2 are connected through explosion-proof threads, so that thread explosion-proof is realized; on the other hand, an independent explosion-proof wiring cavity is formed in the explosion-proof inner sleeve 2, so that the filling of epoxy resin and the penetration of a radio frequency cable are facilitated, the effective explosion-proof of the wireless antenna leading-in device is realized, and the wireless antenna leading-in device is suitable for mining explosion-proof equipment.
In the embodiment, the radio frequency cable 4 sequentially passes through the explosion-proof sleeve, the explosion-proof shell 10 and the sealing pressing piece 6, so that a BNC connector is arranged at the end part of the radio frequency cable 4 positioned in the explosion-proof shell 10, and the transmission of a wireless signal to the explosion-proof shell, namely a wireless signal receiving port of a wireless receiving device in the shell of the mining explosion-proof equipment is facilitated; the end part of the radio frequency cable 4 outside the flameproof shell 10 is provided with a flexible rubber sleeve 7, so that a wireless antenna is formed; in addition, the shielding layer of the radio frequency cable 4 is not damaged, and the anti-interference capability of the wireless lead-in device is improved.
In the embodiment, the epoxy resin 5 is filled between the radio frequency cable 4 and the explosion-proof inner sleeve 2, on one hand, the radio frequency cable 4 can be fixed after the epoxy resin is cured, and therefore the radio frequency cable 4 meets the requirement of a tension test by matching with the sealing pressing piece 6; on the other hand, the epoxy resin has low shrinkage during curing, generates small internal stress, improves the adhesive strength on the radio frequency cable 4, and has alkali resistance, acid resistance, solvent resistance, heat resistance, high dielectric property, surface leakage resistance and electric arc resistance after curing.
In this embodiment, the sealing and compressing member 6 comprises a sealing cylinder 6-2 and a sealing gasket 6-3, the sealing cylinder 6-2 and the sealing gasket 6-3 extend into the flameproof housing 10, and the pressure plate is attached to the outer side surface of the flameproof housing 10 to seal and compress the radio frequency cable 4, so that the radio frequency cable 4 is not easy to loosen and loosen, the introducing device compresses the sealing cylinder all the time, the cable is tightly held by the sealing cylinder, and the flameproof effect is stable.
In the embodiment, the sealing cylinder 6-2 and the sealing gasket 6-3 are arranged, and the sealing gasket 6-3 is used for supporting the end face of the sealing cylinder 6-2, so that the thrust of the pressure plate can be fully transmitted to the sealing cylinder 6-2, the deformation of the sealing cylinder 6-2 is uniform, the sealing cylinder 6-2 can be prevented from being damaged, the sealing cylinder 6-2 is ensured to be attached to the inner side wall of the through hole in the flameproof shell 10, the radio frequency cable 4 is tightly held, and the flameproof sealing effect is improved.
In this embodiment, during actual use, one end of the flexible rubber sleeve 7 close to the flameproof housing 10 is a circular end 7-2, and the other end of the flexible rubber sleeve 7 is a frustum end 7-1.
In the embodiment, it needs to be explained that the mining explosion-proof wireless antenna lead-in device meets the underground explosion-proof standard of a coal mine, also meets the national standard, is safe and reliable, solves the problem of serious attenuation of wireless signal intensity caused by mining explosion-proof equipment, can improve the sensitivity of wireless signal reception, and ensures the safe and reliable wireless operation within an effective receiving distance. In addition, the radio frequency cable 4 is used as an antenna, the antenna can be arranged at any angle, the problem that the wireless signal incidence angle is small is solved, and the lead-in device is simple in structure, free to bend, long in service life, convenient to install and convenient to maintain.
As shown in fig. 6, the method for installing the mining explosion-proof wireless antenna lead-in device comprises the following steps:
step one, testing the explosion-proof outer sleeve and the explosion-proof inner sleeve:
101, testing an explosion-proof outer sleeve 1 and an explosion-proof inner sleeve 2 for 28 days at the temperature of 80 ℃ and the relative humidity of 90%;
step 102, standing the explosion-proof outer sleeve 1 and the explosion-proof inner sleeve 2 for 24 hours at room temperature;
103, testing the explosion-proof outer sleeve 1 and the explosion-proof inner sleeve 2 for 28 days at the temperature of-30 ℃ and the relative humidity of 90%, wherein the explosion-proof outer sleeve 1 and the explosion-proof inner sleeve 2 are intact, and the explosion-proof outer sleeve 1 and the explosion-proof inner sleeve 2 are qualified;
step two, testing the sealing pressing piece:
step 201, testing the pressure plate according to the method from step 101 to step 103 until the pressure plate is qualified;
step 202, testing the sealing cylinder 6-2 and the sealing gasket 6-3 for 28 days at the temperature of 95 ℃ and the relative humidity of 93%;
step 203, testing the sealing cylinder 6-2 and the sealing gasket 6-3 for 24 hours at the temperature of minus 25 ℃;
step 204, placing the sealing cylinder 6-2 and the sealing gasket 6-3 in No. 2 oil at the temperature of 50 ℃ for 24 hours, wiping the sealing cylinder 6-2 and the sealing gasket 6-3 dry, standing for 24 hours at room temperature, and ensuring that the sealing cylinder and the sealing gasket are intact, so that the sealing cylinder and the sealing gasket are qualified;
step three, testing the flameproof shell:
step 301, impacting the explosion-proof shell 10 by using a 1kg heavy hammer at the temperature of 22.7 ℃, wherein the explosion-proof shell 10 is intact;
302, carrying out a primary test on the explosion-proof shell 10 in a methane air mixing environment with the methane volume concentration of 9.3% -10.3% and the pressure of 0-0.416 MPa;
303, carrying out secondary test on the explosion-proof shell 10 in a methane air mixing environment with the methane volume concentration of 9.3-10.3% and the pressure of 0.060 MPa-0.636 MPa;
step 304, filling mixed gas of hydrogen and air inside and outside the explosion-proof shell 10, wherein the volume concentration of the hydrogen is 54.5-55.5%, igniting the hydrogen in the explosion-proof shell 10 under atmospheric pressure, and indicating that the explosion-proof shell 10 is qualified if the explosion-proof shell 10 does not transfer explosion;
fourthly, installing the explosion-proof sleeve, the sealing pressing piece and the radio frequency cable:
step 401, installing an explosion-proof outer sleeve 1 on the inner side of an explosion-proof shell 10;
402, installing the explosion-proof inner sleeve 2 in the explosion-proof outer sleeve 1, and meanwhile, enabling the end part of the radio-frequency cable 4 extending out of the explosion-proof inner sleeve 2 to penetrate through a first through hole 10-1 and a second through hole 10-2 in the explosion-proof shell 10;
403, sequentially sleeving a sealing gasket 6-3, a sealing cylinder 6-2 and a pressure plate on the outer end of the radio-frequency cable 4 extending out of the flameproof shell 10, and extending the sealing cylinder 6-2 and the sealing gasket 6-3 into the second through hole 10-2 until the sealing gasket 6-3 is contacted with the bottom of the first through hole 10-1; the outer side walls of the sealing cylinder 6-2 and the sealing gasket 6-3 are both contacted with the inner side wall of the first through hole 10-1;
404, a second bolt 6-4 penetrates through a fixing hole 6-1-2 in the gland 6-1 to connect the pressure plate and the explosion-proof shell 10 into a whole;
step five, testing the wireless antenna lead-in device:
step 501, applying 140N-180N of pulling force to the radio frequency cable 4, keeping for 6h, and when the displacement of the radio frequency cable 4 is not more than 6mm and the first bolt 1-3 and the second bolt 6-4 are not loosened, the radio frequency cable 4 is qualified in a pulling force test;
step 502, when 2000kPa pressure is applied to the air filled in the explosion-proof shell 10, 10s is kept, no leakage occurs at the installation position of the radio frequency cable 4, and the wireless antenna introducing device is qualified to meet the requirement of mining explosion-proof.
In this embodiment, in step 402, the explosion-proof inner sleeve 2 is installed in the explosion-proof outer sleeve 1, and the specific process is as follows:
step 4021, installing a baffle ring 2-6 at the end part of the explosion-proof inner sleeve 2, and enabling one end of a radio frequency cable 4 to penetrate through the explosion-proof inner sleeve 2 and the baffle ring 2-6;
step 4022, pouring epoxy resin 5 between the radio frequency cable 4 and the explosion-proof inner sleeve 2 until the surface of the epoxy resin 5 is flush with the end part of the explosion-proof inner sleeve 2;
step 4023, curing the explosion-proof inner sleeve 2 filled with the epoxy resin 5 at room temperature for 7-10 days;
step 4024, installing the explosion-proof inner sleeve 2 in the explosion-proof outer sleeve 1.
In this embodiment, after the step 404 is completed, the following steps are further performed:
step 405, installing a BNC connector at the end part of the radio frequency cable 4 in the flameproof shell 10;
406, arranging a flexible rubber sleeve 7 at the end part of the radio frequency cable 4 outside the flameproof shell 10; wherein, the length of the flexible rubber sleeve 7 is not less than 1700 mm.
In this embodiment, the epoxy resin 5 is an epoxy resin black AB glue.
In conclusion, the wireless explosion-proof device is reasonable in design, the signal attenuation of the wireless antenna is reduced, the receiving and transmitting distance of wireless signals is increased, the safety and reliability of wireless operation are guaranteed, the service life is long, the installation is convenient and fast, and the wireless explosion-proof device is suitable for mining explosion-proof equipment.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and all simple modifications, changes and equivalent structural changes made to the above embodiment according to the technical spirit of the present invention still fall within the protection scope of the technical solution of the present invention.
Claims (10)
1. The mining flame-proof type wireless antenna introducing device is characterized in that: the flame-proof cable explosion-proof device comprises a flame-proof sleeve arranged on the inner side of a flame-proof shell (10) and a sealing pressing member (6) arranged on the outer side of the flame-proof shell (10), wherein a radio frequency cable (4) penetrates through the flame-proof sleeve, the flame-proof shell (10) and the sealing pressing member (6), the flame-proof sleeve comprises a flame-proof outer sleeve (1) arranged on the inner side of the flame-proof shell (10) and a flame-proof inner sleeve (2) arranged in the flame-proof outer sleeve (1), and the flame-proof inner sleeve (2) is in flame-proof threaded connection with;
the sealing and compressing part (6) comprises a pressure plate, a sealing cylinder (6-2) and a sealing gasket (6-3) which are sequentially arranged from outside to inside, the sealing cylinder (6-2) and the sealing gasket (6-3) all extend into the flameproof shell (10), the radio frequency cable (4) sequentially penetrates through the flameproof inner sleeve (2), the flameproof shell (10), the sealing gasket (6-3), the sealing cylinder (6-2) and the pressure plate, and epoxy resin (5) is filled between the radio frequency cable (4) and the flameproof inner sleeve (2).
2. The mining flame-proof type wireless antenna lead-in device according to claim 1, characterized in that: the explosion-proof shell (10) is provided with a step hole, the step hole comprises a first through hole (10-1) and a second through hole (10-2) communicated with the first through hole (10-1), the inner diameter of the first through hole (10-1) is larger than that of the second through hole (10-2), the sealing cylinder (6-2) and the sealing gasket (6-3) are located in the first through hole (10-1), the sealing gasket (6-3) is in contact with the bottom of the first through hole (10-1), and the outer side walls of the sealing cylinder (6-2) and the sealing gasket (6-3) are in contact with the inner side wall of the first through hole (10-1).
3. The mining flame-proof type wireless antenna lead-in device according to claim 1, characterized in that: a wiring through hole is arranged in the explosion-proof inner sleeve (2), the wiring through hole comprises a first through hole section (2-2), a second through hole section (2-4) and a third through hole section (2-7) which are communicated in sequence, the inner diameters of the first through hole section (2-2), the second through hole section (2-4) and the third through hole section (2-7) are gradually reduced, a plurality of annular grooves (2-3) are arranged in the explosion-proof inner sleeve (2), the annular grooves (2-3) are positioned in the second through hole sections (2-4), a baffle ring (2-6) is arranged at the joint of the second through hole section (2-4) and the third through hole section (2-7), the end part of the outer side wall of the explosion-proof inner sleeve (2) is provided with a limiting boss (2-5), and the radio frequency cable (4) penetrates through the baffle ring (2-6).
4. The mining flame-proof type wireless antenna lead-in device according to claim 1, characterized in that: the outer side wall of the flameproof outer sleeve (1) is sleeved with an anti-loosening sheet (3), and the anti-loosening sheet (3) is located between the limiting boss (2-5) and the end part of the flameproof outer sleeve (1);
the outer side wall of the explosion-proof inner sleeve (2) is provided with an outer explosion-proof thread (2-1), the inner side wall of the explosion-proof outer sleeve (1) is provided with an inner explosion-proof thread, and the outer explosion-proof thread (2-1) is matched with the inner explosion-proof thread.
5. The mining flame-proof type wireless antenna lead-in device according to claim 1, characterized in that: the flameproof outer sleeve (1) comprises a horizontal installation part (1-1) and a cylindrical part (1-2) which is integrally formed with the horizontal installation part (1-1) and vertically arranged, the horizontal installation part (1-1) is connected with the flameproof shell (10) into a whole through a first bolt (1-3), and an inner flameproof thread is located on the inner side wall of the cylindrical part (1-2);
the pressing plate comprises a pressing cover (6-1) and a boss (6-5) which is integrally formed with the pressing cover (6-1) and vertically arranged, the end part of the boss (6-5) extends into the first through hole (10-1), the end part of the boss (6-5) is attached to the sealing cylinder (6-2), and a wire passing hole (6-1-1) for a radio frequency cable (4) to pass through is formed in the pressing cover (6-1) and the boss (6-5);
the gland (6-1) is provided with a fixing hole (6-1-2) for a second bolt (6-4) to pass through, and the second bolt (6-4) connects the pressure plate and the flameproof shell (10) into a whole.
6. The mining flame-proof type wireless antenna lead-in device according to claim 1, characterized in that: the end part of the radio frequency cable (4) located outside the flameproof outer sleeve (1) is sleeved with a flexible rubber sleeve (7), and the length of the flexible rubber sleeve (7) is not less than 1700 mm.
7. The mining flame-proof type wireless antenna lead-in device according to claim 1, characterized in that: the sealing cylinder (6-2) is a nitrile rubber sealing cylinder, and a BNC joint is arranged at the end part of the radio frequency cable (4) positioned in the explosion-proof outer sleeve (1);
the anti-loosening sheet (3) comprises a collar portion (3-1) and two vertical portions (3-2) symmetrically arranged on the collar portion (3-1), two first plane portions (2-8) symmetrically arranged are arranged on the outer side wall of the end portion of the explosion-proof inner sleeve (2), and the vertical portions (3-2) are attached to the first plane portions (2-8);
and the horizontal mounting part (1-1) of the flameproof jacket (1) is provided with two second plane parts (1-4) which are symmetrically distributed.
8. A mounting method of a mining explosion-proof wireless antenna lead-in device is characterized by comprising the following steps:
step one, testing the explosion-proof outer sleeve and the explosion-proof inner sleeve:
101, testing an explosion-proof outer sleeve (1) and an explosion-proof inner sleeve (2) for 28 days at the temperature of 80 ℃ and the relative humidity of 90%;
step 102, standing the explosion-proof outer sleeve (1) and the explosion-proof inner sleeve (2) for 24 hours at room temperature;
103, testing the explosion-proof outer sleeve (1) and the explosion-proof inner sleeve (2) for 28 days at the temperature of-30 ℃ and the relative humidity of 90%, wherein the explosion-proof outer sleeve (1) and the explosion-proof inner sleeve (2) are intact, and the explosion-proof outer sleeve (1) and the explosion-proof inner sleeve (2) are qualified;
step two, testing the sealing pressing piece:
step 201, testing the pressure plate according to the method from step 101 to step 103 until the pressure plate is qualified;
202, testing the sealing cylinder (6-2) and the sealing gasket (6-3) for 28 days at the temperature of 95 ℃ and the relative humidity of 93%;
step 203, testing the sealing cylinder (6-2) and the sealing gasket (6-3) for 24 hours at the temperature of-25 ℃;
step 204, placing the sealing cylinder (6-2) and the sealing gasket (6-3) in No. 2 oil at the temperature of 50 ℃ for 24 hours, wiping the sealing cylinder (6-2) and the sealing gasket (6-3) dry, standing for 24 hours at room temperature, and determining that the sealing cylinder and the sealing gasket are intact;
step three, testing the flameproof shell:
step 301, impacting the explosion-proof shell (10) by using a 1kg heavy hammer at the temperature of 22.7 ℃, wherein the explosion-proof shell (10) is intact;
302, carrying out primary test on the explosion-proof shell (10) in a methane air mixing environment with the methane volume concentration of 9.3% -10.3% and the pressure of 0-0.416 MPa;
303, carrying out secondary test on the explosion-proof shell (10) in a methane air mixing environment with the volume concentration of methane of 9.3-10.3% and the pressure of 0.060 MPa-0.636 MPa;
step 304, filling mixed gas of hydrogen and air inside and outside the explosion-proof shell (10), wherein the volume concentration of the hydrogen is 54.5-55.5%, igniting the hydrogen in the explosion-proof shell (10), and if the explosion-proof shell (10) is not propagated, indicating that the explosion-proof shell (10) is qualified;
fourthly, installing the explosion-proof sleeve, the sealing pressing piece and the radio frequency cable:
step 401, installing an explosion-proof outer sleeve (1) on the inner side of an explosion-proof shell (10);
402, installing the explosion-proof inner sleeve (2) in the explosion-proof outer sleeve (1), and meanwhile, enabling the end part of the radio-frequency cable (4) extending out of the explosion-proof inner sleeve (2) to penetrate through a first through hole (10-1) and a second through hole (10-2) in the explosion-proof shell (10);
step 403, sequentially sleeving a sealing gasket (6-3), a sealing cylinder (6-2) and a pressure plate on the outer end of the radio frequency cable (4) extending out of the flameproof shell (10), and extending the sealing cylinder (6-2) and the sealing gasket (6-3) into the second through hole (10-2) until the sealing gasket (6-3) is contacted with the bottom of the first through hole (10-1); the outer side walls of the sealing cylinder (6-2) and the sealing gasket (6-3) are in contact with the inner side wall of the first through hole (10-1);
404, a second bolt (6-4) penetrates through a fixing hole (6-1-2) in the gland (6-1) to connect the pressure plate and the explosion-proof shell (10) into a whole;
step five, testing the wireless antenna lead-in device:
step 501, applying 140N-180N of pulling force to the radio frequency cable (4), keeping for 6h, and when the displacement of the radio frequency cable (4) is not more than 6mm and the first bolt (1-3) and the second bolt (6-4) are not loosened, testing the pulling force of the radio frequency cable (4) to be qualified;
step 502, when the pressure of 2000kPa is applied to the air filled in the explosion-proof shell (10), 10s is kept, the installation position of the radio frequency cable (4) is not leaked, and the wireless antenna introducing device is qualified to meet the requirement of mining explosion-proof.
9. The installation method of the mining explosion-proof wireless antenna lead-in device according to claim 8, characterized in that: in the step 402, the explosion-proof inner sleeve (2) is arranged in the explosion-proof outer sleeve (1), and the specific process is as follows:
step 4021, installing a baffle ring (2-6) at the end part of the explosion-proof inner sleeve (2), and enabling one end of the radio-frequency cable (4) to penetrate through the explosion-proof inner sleeve (2) and the baffle ring (2-6);
step 4022, pouring epoxy resin (5) between the radio frequency cable (4) and the explosion-proof inner sleeve (2) until the surface of the epoxy resin (5) is flush with the end part of the explosion-proof inner sleeve (2);
step 4023, curing the explosion-proof inner sleeve (2) filled with the epoxy resin (5) at room temperature for 7-10 days;
step 4024, installing the explosion-proof inner sleeve (2) in the explosion-proof outer sleeve (1).
10. The installation method of the mining explosion-proof wireless antenna lead-in device according to claim 8, characterized in that: after step 404 is completed, the following steps are also performed:
step 405, installing a BNC connector at the end part of the radio frequency cable (4) in the flameproof shell (10);
406, arranging a flexible rubber sleeve (7) at the end part of the radio frequency cable (4) outside the flameproof shell (10); wherein, the length of the flexible rubber sleeve (7) is not less than 1700 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202010871899.XA CN111883904A (en) | 2020-08-26 | 2020-08-26 | Mining explosion-proof wireless antenna leading-in device and installation method thereof |
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| CN202010871899.XA CN111883904A (en) | 2020-08-26 | 2020-08-26 | Mining explosion-proof wireless antenna leading-in device and installation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113873348A (en) * | 2021-09-26 | 2021-12-31 | 陕西智引科技有限公司 | Mining explosion-proof and intrinsically safe 5g wireless base station |
| CN114784558A (en) * | 2022-03-10 | 2022-07-22 | 沈阳中科奥维科技股份有限公司 | Radio frequency connector with explosion-proof function and design method |
-
2020
- 2020-08-26 CN CN202010871899.XA patent/CN111883904A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113873348A (en) * | 2021-09-26 | 2021-12-31 | 陕西智引科技有限公司 | Mining explosion-proof and intrinsically safe 5g wireless base station |
| CN113873348B (en) * | 2021-09-26 | 2024-03-15 | 陕西智引科技有限公司 | Mining flameproof and intrinsically safe 5g wireless base station |
| CN114784558A (en) * | 2022-03-10 | 2022-07-22 | 沈阳中科奥维科技股份有限公司 | Radio frequency connector with explosion-proof function and design method |
| CN114784558B (en) * | 2022-03-10 | 2023-10-31 | 沈阳中科奥维科技股份有限公司 | Radio frequency connector with explosion-proof function and design method |
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