CN211717611U - Intrinsic safety explosion-proof vibration sensor - Google Patents
Intrinsic safety explosion-proof vibration sensor Download PDFInfo
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- CN211717611U CN211717611U CN201922212795.3U CN201922212795U CN211717611U CN 211717611 U CN211717611 U CN 211717611U CN 201922212795 U CN201922212795 U CN 201922212795U CN 211717611 U CN211717611 U CN 211717611U
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- intrinsically safe
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Abstract
The utility model provides an intrinsically safe flame-proof vibration sensor belongs to sensor technical field. The intrinsically safe explosion-proof vibration sensor comprises a sensor main body, an intrinsically safe explosion-proof converter and a connecting piece, wherein the sensor main body is connected with the intrinsically safe explosion-proof converter through the connecting piece; the sensor main body comprises a shell, a circuit board arranged in the shell, and a high-frequency vibration induction chip and a medium-frequency vibration induction chip which are arranged on the circuit board. The utility model discloses an intrinsically safe flame proof vibration sensor utilizes independently research and development technique, through set up high frequency vibration induction chip and intermediate frequency vibration induction chip in the sensor main part, realize the true measurement of three direction vibration, in addition, the converter adopts explosion-proof casing and intrinsically safe circuit to keep apart the spark discharge energy of surrounding environment and restriction circuit, realize explosion-proof purpose, in order to reach and install the deployment fast under the circumstances that equipment does not shut down, and wireless gateway carries out data transmission's purpose.
Description
Technical Field
The utility model belongs to the technical field of the sensor, concretely relates to this ampere of flame proof vibration sensor.
Background
Modern large-scale chemical industry or metallurgical special environment enterprises often have many large-scale mechanical equipment, they are heavy work under adverse circumstances such as high temperature, high humidity, heavy load, dusty and harmful medium mostly, and a mechanical equipment breaks down and will make whole production influenced, even compel to shut down production and overhaul, and this not only influences the completion of production plan, can cause huge economic loss for the enterprise moreover, therefore carry out vibration monitoring to key equipment running state, foresee the emergence of equipment trouble in advance, diagnose equipment trouble and have great meaning.
In practical test application, many occasions do not have the condition and permission of wired installation, and particularly in some chemical metallurgy sites, special explosive gas exists, so that a vibration sensor needs to be developed and can be quickly installed and deployed under the condition that equipment does not shut down, and the threshold of applying an online monitoring system is reduced.
SUMMERY OF THE UTILITY MODEL
The utility model discloses aim at solving one of the technical problem that exists among the prior art at least, provide an intrinsically safe flame proof vibration sensor.
The utility model provides an intrinsically safe flame-proof vibration sensor, which comprises a sensor main body, an intrinsically safe flame-proof converter and a connecting piece, wherein the sensor main body is connected with the intrinsically safe flame-proof converter through the connecting piece; wherein the content of the first and second substances,
the sensor main body comprises a shell, a circuit board arranged in the shell, and a high-frequency vibration induction chip and a medium-frequency vibration induction chip which are arranged on the circuit board.
Optionally, the high-frequency vibration induction chip adopts a single-axis high-g-value accelerometer, and the medium-frequency vibration induction chip adopts a three-axis low-g-value accelerometer.
Optionally, the magnetic connector further comprises a first magnetic member and a fastening member, the first magnetic member is located on one side of the housing in the thickness direction, and the fastening member penetrates through the housing from the other side of the housing in the thickness direction to be connected with the first magnetic member.
Optionally, the intrinsically safe flameproof converter includes an explosion-proof housing, a power supply assembly and an intrinsically safe circuit, a first cavity and a second cavity which are isolated from each other are arranged in the explosion-proof housing, the power supply assembly is arranged in the first cavity, the intrinsically safe circuit is arranged in the second cavity, and the power supply assembly is connected with the intrinsically safe circuit to supply power to the intrinsically safe circuit.
Optionally, the power supply assembly comprises a box body, a power source and an encapsulation cover plate, the box body is arranged in the first cavity, the power source is arranged in the box body, and the encapsulation cover plate covers the box body.
Optionally, this ampere of circuit includes the circuit board and sets up acquisition unit, the control unit, power management unit and wireless transceiver unit on the circuit board, acquisition unit's input with the output electricity of sensor main part is connected, acquisition unit's output with the control unit electricity is connected, the control unit still with power management unit wireless transceiver unit electricity is connected.
Optionally, the wireless transceiver unit includes an antenna subunit and a main control transceiver subunit; wherein the content of the first and second substances,
the antenna subunit is used for receiving the instruction and transmitting vibration data in each direction;
and the main control receiving and transmitting subunit is used for adjusting the gain of the high-frequency antenna according to the vibration data.
Optionally, the radio transceiver unit employs an LORA radio transceiver unit or an NB-IOT radio transceiver unit.
Optionally, the intrinsically safe explosion-proof converter further comprises a back plate and an antenna box, the back plate is detachably covered on the explosion-proof shell, and the antenna box is arranged on the explosion-proof shell along the length direction and close to one side of the circuit board; wherein the content of the first and second substances,
and a second magnetic part is arranged on one side of the back plate, which deviates from the explosion-proof shell.
Optionally, the connecting piece adopts multicore fluoroplastic insulation shielding cable and covers metal bellows outward.
The utility model provides an intrinsically safe flame-proof vibration sensor has following beneficial effect for prior art: firstly, through setting up high frequency vibration induction chip and intermediate frequency vibration induction chip in the sensor main part, can realize the true measurement of three direction vibrations. Secondly, the converter adopts an explosion-proof shell and an intrinsic safety circuit simultaneously to isolate the surrounding environment and limit the spark discharge energy of the circuit, thereby realizing the purpose of intrinsic safety explosion prevention. The utility model provides an intrinsically safe flame proof vibration sensor utilizes independently research and development technique, adopt intrinsically safe type modularization circuit design thinking, flame proof structural design is simple reliable, protection level IP67, can be to the chemical industry, special occasions such as metallurgical industry slewing bearing equipment is perpendicular, the level, axial vibration carries out for a long time, real-time supervision, it is uneven to accurately reflect rotating mechanical equipment, the structure is not hard up, the vibration anomaly that common fault brought such as well as not, be used for the analysis, judge the equipment state in advance, carry out equipment failure diagnosis, in order to reach and install the deployment under the circumstances that equipment does not shut down fast, carry out data transmission's mode with the wireless gateway. In addition, the intrinsically safe explosion-proof vibration sensor omits construction deployment work such as power supply, cable laying, wiring, bridge frame walking and the like, a wireless monitoring network which accords with intrinsic safety is safely and reliably and quickly built, the threshold of an applied online monitoring system is greatly reduced, and batch installation and production are easy.
Drawings
Fig. 1 is a schematic view of the overall structure of an intrinsically safe explosion-proof vibration sensor in the embodiment of the present invention;
FIG. 2 is a schematic diagram of a sensor main structure of an intrinsically safe flameproof vibration sensor according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of an intrinsically safe flameproof converter of an intrinsically safe flameproof vibration sensor in an embodiment of the present invention;
fig. 4 is a schematic block diagram of the intrinsically safe circuit structure of the intrinsically safe flameproof converter in the embodiment of the present invention.
Detailed Description
In order to make the technical solution of the present invention better understood by those skilled in the art, the present invention will be described in further detail with reference to the accompanying drawings and the detailed description.
As shown in fig. 1 to 4, the present invention provides an intrinsically safe flame-proof vibration sensor 100, which includes a sensor main body 110, an intrinsically safe flame-proof converter 120 and a connecting member 130, wherein the sensor main body 110 is connected to the intrinsically safe flame-proof converter 120 through the connecting member 130; the sensor body 110 includes a housing 111, a circuit board 112 disposed in the housing 111, and a high frequency vibration sensing chip and a medium frequency vibration sensing chip disposed on the circuit board 112.
It should be noted that the circuit board 112 may be a PCB circuit board, the high-frequency vibration sensing chip may be a single-axis high-g accelerometer, and the medium-frequency vibration sensing chip may be a three-axis low-g accelerometer. Wherein, the full range (FSR) of the triaxial low-g-value accelerometer is +/-4 g to +/-50 g, and the triaxial low-g-value accelerometer has 1Hz to 10kHz selectable digital filtering, 25 mu/Hz low noise density and 150 mu A power consumption, thereby realizing the performance level of expensive broadband vibration equipment at lower cost. By arranging the high-frequency vibration induction chip and the medium-frequency vibration induction chip in the circuit board 112, real measurement of vibration in three directions can be realized. Vibration data measured by the sensor main body 110 are transmitted to the intrinsically safe flameproof converter 120 through the connecting piece 130, and further vibration signals are processed through an intrinsically safe circuit 123 arranged in the intrinsically safe flameproof converter 120, so that the running state of equipment is monitored and analyzed in a wireless gateway mode.
It should be further noted that the connecting member 130 may be a multi-core corrugated pipe cable, specifically, the multi-core corrugated pipe cable is a high temperature resistant multi-core fluoroplastic insulation shielding cable, and an outer sheath of the multi-core corrugated pipe cable is a metal corrugated pipe, so as to be used for signal transmission between the sensor main body 110 and the intrinsically safe flameproof converter 120, and at the same time, the multi-core corrugated pipe cable can effectively protect the cable from wear and aging.
In order to attach the sensor body to the position of the device under test, specifically, as shown in fig. 2, the sensor body 110 further includes a first magnetic member 113 and a fastening member 114, the first magnetic member 113 is located on one side of the housing 111 in the thickness direction, and the fastening member 114 penetrates the housing 111 from the other side of the housing 111 in the thickness direction to be connected to the first magnetic member 113. In addition, the sensor body 110 further includes a housing cover 115, the housing 111 has an inlet along a length direction to allow the high frequency vibration sensing chip and the medium frequency vibration sensing chip to be taken and placed, and the housing cover 115 is detachably covered on the inlet of the housing 111. It should be noted that, in the present embodiment, the housing 111 is made of stainless steel, and the housing 111 may have other shapes such as a rectangular parallelepiped, a square cube, etc., and the fastening member 114 may be any one of a bolt, a nut, a stud, a screw, etc. for fastening, and secondly, the first magnetic member 113 in the present embodiment may be made of a ring-shaped magnet, such as an oval magnet, so that the shape of the housing 111, the type of the fastening member 114, and the shape of the first magnetic member 113 are not specifically limited herein, and those skilled in the art can select them according to actual needs.
Specifically, this embodiment adopts two bolts to run through casing 111 thickness and is connected ring magnet and casing 111, and the rotatory vibration position of equipment under test is covered with epoxy glue to the adsorption affinity through ring magnet to, casing 111 is inside to be full of with epoxy glue, and the fastening and the waterproof between connecting piece 130 and casing 111 are guaranteed to the watertight tail end.
Specifically, as shown in fig. 3, the intrinsically safe flameproof converter 120 in this embodiment includes an explosion-proof housing 121, a power supply assembly 122, and an intrinsically safe circuit 123, wherein a first chamber 121a and a second chamber 121b that are isolated from each other are disposed in the explosion-proof housing 121, the power supply assembly 122 is disposed in the first chamber 121a, the intrinsically safe circuit 123 is disposed in the second chamber 121b, and the power supply assembly 122 is connected to the intrinsically safe circuit 123 to supply power to the intrinsically safe circuit 123.
The intrinsically safe flameproof converter 120 in the above example adopts the flameproof housing 121, and the intrinsically safe circuit 123 is also arranged in the flameproof housing 121. The explosion-proof housing 121 can structurally isolate the intrinsically safe circuit 123 from the surrounding environment, so that heat generated by normal operation of the intrinsically safe circuit 123 and high temperature of an electric spark machine formed in a fault are both limited between the sealed explosion-proof housing 121, and ignition of surrounding flammable and explosive gases is prevented. Secondly, the intrinsic safety circuit 123 can limit the spark discharge energy of the circuit by limiting various parameters in the device circuit, so that the spark and the heat effect generated under the normal working and the specified fault state can not ignite the explosive mixture of the surrounding environment, thereby realizing explosion prevention. That is, the present embodiment combines the two explosion-proof technologies to achieve the purpose of explosion-proof while performing vibration detection on the operation state of the device.
Specifically, as shown in fig. 3, the power supply assembly 122 includes a box 122a, a power supply 122b, and a sealing cover 122c, wherein the box 122a is disposed in the first chamber 121a, the power supply 122b is disposed in the box 122a, and the sealing cover 122c covers the box 122 a. It should be noted that, in the present embodiment, the power source 122b may be a lithium sub-battery, and the corresponding box 122a is a lithium sub-battery box, so that the first chamber 121a where the corresponding power supply assembly 122 is located corresponds to a battery compartment.
Optionally, as shown in fig. 4, the intrinsically safe circuit 123 includes a circuit board, and an acquisition unit 123a, a control unit 123b, a power management unit 123c, and a wireless transceiver unit 123d that are disposed on the circuit board, where an input end of the acquisition unit 123a is electrically connected to an output end of the sensor body 110, an output end of the acquisition unit 123a is electrically connected to the control unit 123b, and the control unit 123b is further electrically connected to the power management unit 123c and the wireless transceiver unit 123 d.
It should be noted that the acquisition unit 123a in the above example includes signal isolation amplification and AD acquisition, and performs FFT frequency domain data spectrum analysis and recording after integration, differentiation, filtering and normalization. The core of the control unit 123b is that the embedded main control chip processes data of the acquisition unit 123a, and simultaneously implements scheduling of the power management unit 123c and frequency control of the wireless transceiver unit 123d, wherein the power management unit 123c can control the power of the power supply 122b to be effectively exerted, and simultaneously matches the requirement of controlling the intrinsically safe circuit 123 to limit power and implement discharge protection. That is, the device vibration signal collected by the sensor body 110 is analyzed and recorded by the collection unit 123a, and then the analyzed and recorded vibration signal is processed by the control unit 123 b. Therefore, the second chamber 121b in which the corresponding intrinsic safety circuit 123 is located in the embodiment corresponds to an electrical chamber.
Optionally, the wireless transceiver unit 123d includes an antenna subunit and a main control transceiver subunit; the antenna subunit is used for receiving the instruction and transmitting vibration data in each direction; and the main control receiving and transmitting subunit is used for adjusting the gain of the high-frequency antenna according to the vibration data. That is to say, the antenna subunit can establish data transmission with the main control transceiver subunit, and simultaneously adjust the gain of the high-frequency antenna in real time, and monitor and manage the running state of the equipment in a wireless gateway deployment mode aiming at measuring points far away from each other, so that the running trend of the equipment for continuous days can be observed, and professional vibration analysis can be performed.
In this example, the radio transceiver 123d is an LORA radio transceiver or an NB-IOT radio transceiver, which is not specifically limited herein.
Optionally, as shown in fig. 3, the intrinsically safe flameproof converter 120 further includes a back plate 124 and an antenna box 125, the back plate 124 is detachably covered on the flameproof housing 121, and the antenna box 125 is disposed on the flameproof housing 121 along the length direction and near one side of the circuit board 123, and is used for storing an antenna and playing a role in water resistance. Wherein, a second magnetic member (not shown) is further disposed on a side of the back plate 124 facing away from the explosion-proof housing 121, and the back plate 124 can be fastened or mounted with a magnetic strip by bolts, so as to be mounted or adsorbed near the measured portion of the device.
The utility model provides an intrinsically safe flame-proof vibration sensor has following beneficial effect for prior art: firstly, through setting up high frequency vibration induction chip and intermediate frequency vibration induction chip in the sensor main part, can realize the true measurement of three direction vibrations. Secondly, the converter adopts an explosion-proof shell and an intrinsic safety circuit simultaneously to isolate the surrounding environment and limit the spark discharge energy of the circuit, thereby realizing the purpose of intrinsic safety explosion prevention. The utility model provides an intrinsically safe flame proof vibration sensor utilizes independently research and development technique, adopt intrinsically safe type modularization circuit design thinking, flame proof structural design is simple reliable, protection level IP67, can be to the chemical industry, special occasions such as metallurgical industry slewing bearing equipment is perpendicular, the level, axial vibration carries out for a long time, real-time supervision, it is uneven to accurately reflect rotating mechanical equipment, the structure is not hard up, the vibration anomaly that common fault brought such as well as not, be used for the analysis, judge the equipment state in advance, carry out equipment failure diagnosis, in order to reach and install the deployment under the circumstances that equipment does not shut down fast, carry out data transmission's mode with the wireless gateway. In addition, the intrinsically safe explosion-proof vibration sensor omits construction deployment work such as power supply, cable laying, wiring, bridge frame walking and the like, a wireless monitoring network which accords with intrinsic safety is safely and reliably and quickly built, the threshold of an applied online monitoring system is greatly reduced, and batch installation and production are easy.
It is to be understood that the above embodiments are merely exemplary embodiments adopted to illustrate the principles of the present invention, and the present invention is not limited thereto. It will be apparent to those skilled in the art that various changes and modifications can be made without departing from the spirit and substance of the invention, and these changes and modifications are also considered to be within the scope of the invention.
Claims (10)
1. An intrinsically safe explosion-proof vibration sensor is characterized by comprising a sensor main body, an intrinsically safe explosion-proof converter and a connecting piece, wherein the sensor main body is connected with the intrinsically safe explosion-proof converter through the connecting piece; wherein the content of the first and second substances,
the sensor main body comprises a shell, a circuit board arranged in the shell, and a high-frequency vibration induction chip and a medium-frequency vibration induction chip which are arranged on the circuit board.
2. The intrinsically safe flameproof vibration sensor of claim 1, wherein the high-frequency vibration sensing chip adopts a single-axis high-g-value accelerometer, and the medium-frequency vibration sensing chip adopts a three-axis low-g-value accelerometer.
3. The intrinsically safe flameproof vibration sensor of claim 2, further comprising a first magnetic member and a fastener, wherein the first magnetic member is located on one side of the shell in the thickness direction, and the fastener penetrates through the shell from the other side of the shell in the thickness direction to be connected with the first magnetic member.
4. The intrinsically safe flameproof vibration sensor of claim 1, wherein the intrinsically safe flameproof converter comprises an explosion-proof shell, a power supply assembly and an intrinsically safe circuit, a first cavity and a second cavity which are isolated from each other are arranged in the explosion-proof shell, the power supply assembly is arranged in the first cavity, the intrinsically safe circuit is arranged in the second cavity, and the power supply assembly is connected with the intrinsically safe circuit to supply power to the intrinsically safe circuit.
5. The intrinsically safe flameproof vibration sensor of claim 4, wherein the power supply assembly comprises a box body, a power supply and an encapsulation cover plate, the box body is arranged in the first cavity, the power supply is arranged in the box body, and the encapsulation cover plate covers the box body.
6. An intrinsically safe flameproof vibration sensor according to claim 5, wherein the intrinsically safe circuit comprises a circuit board, and an acquisition unit, a control unit, a power management unit and a wireless transceiving unit which are arranged on the circuit board, wherein the input end of the acquisition unit is electrically connected with the output end of the sensor body, the output end of the acquisition unit is electrically connected with the control unit, and the control unit is further electrically connected with the power management unit and the wireless transceiving unit.
7. The intrinsically safe flameproof vibration sensor of claim 6, wherein the wireless transceiver unit comprises an antenna subunit and a main control transceiver subunit; wherein the content of the first and second substances,
and the antenna subunit is used for receiving the instruction and transmitting vibration data in all directions.
8. The intrinsically safe flameproof vibration sensor of claim 7, wherein the wireless transceiver unit is an LORA wireless transceiver unit or an NB-IOT wireless transceiver unit.
9. An intrinsically safe flameproof vibration sensor according to any one of claims 6 to 8, wherein the intrinsically safe flameproof converter further comprises a back plate and an antenna box, the back plate is detachably covered on the explosion-proof shell, and the antenna box is arranged on the explosion-proof shell along the length direction and close to one side of the circuit board; wherein the content of the first and second substances,
and a second magnetic part is arranged on one side of the back plate, which deviates from the explosion-proof shell.
10. The intrinsically safe flameproof vibration sensor of any one of claims 1 to 8, wherein the connecting piece is a multi-core fluoroplastic insulated shielded cable and an externally coated metal corrugated tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922212795.3U CN211717611U (en) | 2019-12-11 | 2019-12-11 | Intrinsic safety explosion-proof vibration sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922212795.3U CN211717611U (en) | 2019-12-11 | 2019-12-11 | Intrinsic safety explosion-proof vibration sensor |
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| Publication Number | Publication Date |
|---|---|
| CN211717611U true CN211717611U (en) | 2020-10-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922212795.3U Active CN211717611U (en) | 2019-12-11 | 2019-12-11 | Intrinsic safety explosion-proof vibration sensor |
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| CN (1) | CN211717611U (en) |
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