CN115876307B - Low-frequency dynamic signal trend analysis sensor for special equipment - Google Patents
Low-frequency dynamic signal trend analysis sensor for special equipment Download PDFInfo
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- CN115876307B CN115876307B CN202310043202.3A CN202310043202A CN115876307B CN 115876307 B CN115876307 B CN 115876307B CN 202310043202 A CN202310043202 A CN 202310043202A CN 115876307 B CN115876307 B CN 115876307B
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Abstract
The invention belongs to the technical field of sensors, in particular to a low-frequency dynamic signal trend analysis sensor of special equipment, which comprises a shell, a connecting screw, an installation protecting shell, a signal transmission line, a waveform output module, a signal processing module and a polysilicon wafer body, wherein the connecting screw is fixedly installed at the bottom of the shell, and the waveform output module, the signal processing module and the polysilicon wafer body are all installed inside the shell; according to the invention, the low-frequency vibration signal is timely detected through the polysilicon wafer body and is converted into the electric signal which can be identified by the signal processing module, so that after data processing, the electric signal is output through the waveform output module, and the means such as envelope analysis, scrambling analysis and the like are utilized, so that the accurate health evaluation is carried out on the degradation trend generated in the driving process of the escalator driving wheel, the situation can be timely found when the equipment to be detected is excessively worn, the equipment to be detected is timely maintained and replaced, and the probability of accident occurrence is reduced.
Description
Technical Field
The invention belongs to the technical field of sensors, and particularly relates to a low-frequency dynamic signal trend analysis sensor for special equipment.
Background
In the highly developed modern industry, the development of modern test technology has become a necessary development trend towards digitization and informatization, and the forefront of the test system is a sensor, which is the soul of the whole test system and is listed as a tip technology by various countries in the world, in particular to an IC technology and a computer technology which are rapidly developed in recent years, so that a good and reliable scientific technology foundation is provided for the development of the sensor. The sensor has new moon in development days, and digitization, multifunction and intellectualization are important characteristics of the modern sensor development.
The vibration sensor can analyze the vibration trend of the tested equipment according to the vibration of the tested equipment so as to judge the working condition of the tested equipment; in the operation of the escalator bearing of special equipment, the friction produced in the working operation process easily causes component damage and causes major accidents, but the transmission frequency of the main driving wheel of the escalator is extremely low, so the detection is difficult, the field is a blank phenomenon for a long time, the transmission research of the main driving wheel is not started for the specificity of the escalator until recent years, but the existing sensor is difficult to achieve the degree of accurate analysis, so the good effect is not obtained all the time, the working state of the main driving wheel of the escalator is difficult to accurately and timely judge, and the excessive abrasion and maintenance and replacement of the main driving wheel of the escalator are timely found.
In the existing installation process, the shell part of the sensor is often connected with the position to be measured on the equipment to be measured through a connecting screw, the end part of the connecting screw is inserted into a hole reserved on the position to be measured for installation, and the relative fixation between the shell part and the equipment to be measured is realized through the locking of mutually matched threads; in the use process, the detection personnel find that the installation stability between the connecting screw on the shell and the equipment to be detected has a larger influence on the accuracy of the detection result, in the installation process, if the installation position is unstable, the connection between the connecting screw and the position to be detected can interfere with the acquisition of the normal vibration signal of the equipment to be detected, which can cause the detected vibration degree to be obviously larger than the normal vibration, and the misjudgment on the detection result is easy to be caused when the result is output, so that the maintenance and the replacement are carried out in advance when the maintenance and the replacement are not needed, and the cost is increased.
The important reason for unstable connection is that in the connection and installation process, particularly in the installation position of the escalator driving wheel of special equipment, impurities such as dust moisture from the outside infiltrate into the joint between the connecting screw and the position to be tested in the use process, so that the corrosion of the connection part is aggravated and the connection is unstable; and after the impurity at the connecting part is increased and corrosion is aggravated, the disassembly of the shell body can also cause larger obstruction when the shell body needs to be replaced, and the sensor and the equipment to be tested are easily damaged in the disassembly.
Disclosure of Invention
In order to make up for the deficiency of the prior art, solve the above-mentioned technical problem; the invention provides a low-frequency dynamic signal trend analysis sensor for special equipment.
The technical scheme adopted for solving the technical problems is as follows: the low-frequency dynamic signal trend analysis sensor of the special equipment comprises a shell, a connecting screw, an installation protecting shell, a signal transmission line, a waveform output module, a signal processing module and a polysilicon wafer body, wherein the connecting screw is fixedly installed at the bottom of the shell, and the waveform output module, the signal processing module and the polysilicon wafer body are all installed inside the shell;
the signal transmission line penetrates through an outlet arranged at the top of the shell, stretches into the shell and is communicated with the waveform output module, and the installation protecting shell is arranged at the bottom of the shell and is positioned at the two sides of the connecting screw;
the mounting protection shell comprises a protection ring body and a protection circular plate, the protection ring body is mounted at the bottom of the shell, and the protection circular plate is mounted on the protection ring body and opposite to one end of the connecting screw; the end part of the connecting screw extends out through a mounting hole arranged in the middle part of the protective circular plate;
the protection plectane top edge position is equipped with annular closed groove, closed groove internally mounted has the closed circle, the closed circle is elastic material.
Preferably, a fixed sliding groove is formed in the bottom of the shell, close to the connecting screw, a fixed hole is uniformly formed in the fixed sliding groove, a fixed sliding block is arranged on the inner side surface of the protection ring body, corresponding to the fixed sliding groove, and a threaded hole is formed in the fixed sliding block.
Preferably, the inside of the closed ring is hollow, an annular air cavity is arranged on the inner wall of the protective ring body and close to the protective circular plate, the annular air cavity is communicated with air supply equipment, and the annular air cavity is communicated with the inside of the closed ring.
Preferably, a plurality of partition plates are uniformly arranged on the inner wall of the closed ring, and isolate the hollow area inside the closed ring into a plurality of isolated air chambers which are not communicated with each other;
the side wall of the annular air cavity is provided with a plurality of air guide holes at positions corresponding to the isolation air chamber, and control air valves are arranged in the air guide holes.
Preferably, a push rod is arranged at one side, close to the isolation air chamber, inside the air guide hole, and the push rod is slidably arranged inside the air guide hole; the end part of one side of the air guide hole, which is close to the isolation air chamber, is of a horn-shaped structure; the side wall of the ejector rod is uniformly provided with air guide grooves; and the side wall of the ejector rod is connected with the inner wall of the air guide hole through a spring.
Preferably, a stabilizer bar is arranged at one end part of the ejector rod far away from the air guide hole, and the stabilizer bar is arc-shaped; and a stabilizing groove is formed in the middle of the inner wall of the closed ring, and the cross section of the stabilizing groove is V-shaped.
Preferably, an annular cleaning air cavity is arranged in the protective circular plate, and the cleaning air cavity is communicated with the annular air cavity through an air duct;
the inner wall of the mounting hole is uniformly provided with a cleaning hole, the cleaning hole is obliquely directed to the outer side of the mounting hole, and the cleaning hole is communicated with the inside of the cleaning air cavity.
Preferably, the outer surface of the protection circular plate is uniformly provided with drainage grooves, the drainage grooves are distributed annularly around the mounting holes, and the drainage grooves extend into the closed grooves.
The beneficial effects of the invention are as follows.
1. The low-frequency dynamic signal trend analysis sensor of the special equipment timely detects the low-frequency vibration signal through the polycrystalline silicon wafer body and converts the low-frequency vibration signal into the electric signal which can be identified by the signal processing module, so that after data processing is carried out, the vibration primary waveform is output through the waveform output module and is transmitted to external data computing processing equipment through the connected signal transmission line, and accurate health assessment is carried out on degradation trend generated in the transmission process of the escalator driving wheel by means of envelope analysis, frequency inversion analysis and the like, so that the situation can be found when the equipment to be detected is excessively worn, maintenance and replacement can be carried out timely, and the probability of accident occurrence is reduced.
2. According to the low-frequency dynamic signal trend analysis sensor for the special equipment, the protection of the connecting screw is formed by the protection ring body and the protection circular plate, so that the possible damage to the connecting screw part caused by external collision in the use process can be effectively avoided, the tight and stable combination between the connecting screw and the position to be detected is ensured, the interference of relative vibration between the connecting parts on the working vibration signal of the equipment to be detected in the sensor equipment is reduced, the detection accuracy is improved, the safety of the connecting screw part on the shell is ensured, the connecting screw part can be repeatedly used, and the replacement cost is reduced.
Drawings
The invention is further described below with reference to the accompanying drawings.
Fig. 1 is a perspective view of the present invention.
Fig. 2 is a schematic view of the internal structure of the housing according to the present invention.
FIG. 3 is a front view of the present invention with the housing removed and the protective housing installed.
Fig. 4 is a partial cross-sectional view of the present invention.
Fig. 5 is a partial enlarged view at a in fig. 4.
Fig. 6 is a partial enlarged view at B in fig. 5.
Fig. 7 is a perspective view of another view of the present invention.
Fig. 8 is a partial enlarged view at C in fig. 7.
Fig. 9 is a perspective view of the ejector pin in the present invention.
Fig. 10 is a schematic diagram of functional modules in the present invention.
In the figure: the device comprises a shell 1, a connecting screw 11, a mounting protective shell 12, a protective ring body 121, a protective circular plate 122, a fixed sliding block 123, an annular air cavity 124, a mounting hole 125, an outlet 13, a closed groove 14, a closed ring 15, a partition plate 151, an isolated air chamber 152, an air guide hole 153, a stabilizing groove 154, a fixed sliding groove 16, a fixed hole 161, a push rod 17, an air guide groove 171, a stabilizing rod 172, a cleaning air cavity 18, an air guide pipe 181, a cleaning hole 182, an air guide groove 183, a signal transmission line 2, a waveform output module 3, a signal processing module 4 and a polysilicon wafer 5.
Detailed Description
The technical solutions of the embodiments of the present invention will be clearly and completely described with reference to the drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
The low-frequency dynamic signal trend analysis sensor of the special equipment is shown as figures 1-10 in the specification and the drawings, can be used as a vibration sensor for analyzing the vibration trend of the tested equipment according to the vibration of the tested equipment so as to judge the working condition of the tested equipment; in the running of the escalator bearing of special equipment, the friction generated in the working running process is easy to cause component damage and cause major accidents, so that the damage is extremely large, but the transmission frequency of the main driving wheel of the escalator is extremely low, the detection is difficult, the field is a blank phenomenon for a long time, the transmission research of the main driving wheel is not started for the specificity of the escalator until recent years, but the existing sensor is difficult to achieve the degree of accurate analysis, so that the good effect is not obtained all the time, the working state of the main driving wheel of the escalator is difficult to accurately and timely judge, and the excessive abrasion and maintenance and replacement of the main driving wheel of the escalator are timely found;
therefore, the low-frequency dynamic signal trend analysis sensor for the special equipment comprises a shell 1, a connecting screw 11, a mounting protective shell 12, a signal transmission line 2, a waveform output module 3, a signal processing module 4 and a polysilicon wafer body 5, wherein the shell 1 is made of metal, and the connecting screw 11 is fixedly arranged at the bottom of the shell 1 and is used for being connected with a preset mounting detection position on equipment to be detected, such as an escalator main driving wheel; the waveform output module 3, the signal processing module 4 and the polysilicon wafer body 5 are all arranged in the shell 1;
the adopted signal transmission line 2 penetrates through the outlet 13 arranged at the top of the shell 1 to extend into the shell 1, and a line locking device can be arranged at the position of the outlet 13 and used for ensuring the connection stability of the signal transmission line 2, and a waterproof sealing layer can prevent dust and moisture from penetrating through the position of the signal transmission line 2 in the use process, so that the normal operation of an internal functional module structure is ensured, and the line locking device and the waterproof sealing layer are selected and arranged as common structures on the vibration sensor in the prior art; the signal transmission line 2 is communicated with the waveform output module 3;
in the existing installation process, the part of the shell 1 of the sensor is often connected with a position to be measured on the equipment to be measured through a connecting screw 11, the end part of the connecting screw 11 is inserted into a hole reserved on the position to be measured for installation, and the relative fixation between the part of the shell 1 and the equipment to be measured is realized through the locking of mutually matched threads; in the use process, the detection personnel find that the installation stability between the connecting screw 11 on the shell 1 and the equipment to be detected has a great influence on the accuracy of the detection result, if the installation position is not firm in the installation process, in the vibration process of the equipment to be detected, the relative vibration generated by the connection between the connecting screw 11 and the position to be detected because of the infirm can interfere and influence the acquisition of the normal vibration signal of the equipment to be detected by the functional module in the shell 1, thus the detected vibration degree is usually caused to be obviously greater than the normal vibration, the misjudgment on the detection result is easily caused when the result is output, and the maintenance and the replacement are performed in advance when the maintenance and the replacement are not required, so that the cost is increased;
the important reason for unstable connection is that in the connection and installation process, particularly in the installation position of the escalator driving wheel of special equipment, impurities such as dust, moisture and the like from the outside penetrate into the joint between the connecting screw 11 and the position to be tested in the use process, so that the corrosion of the connection part is aggravated and the connection is unstable; in addition, after the impurities at the connecting part are increased and corrosion is aggravated, the disassembly of the shell 1 is also greatly hindered when the shell needs to be replaced, and the sensor and the equipment to be tested are easily damaged in the disassembly;
therefore, the mounting protective shell 12 is arranged at the bottom of the shell 1 and positioned at the positions of two sides of the connecting screw 11, the mounting protective shell 12 comprises a protective ring body 121 and a protective circular plate 122, the protective ring body 121 is arranged at the bottom of the shell 1, the protective circular plate 122 is arranged on the protective ring body 121 and is opposite to one end of the connecting screw 11, and the end part of the connecting screw 11 extends out through a mounting hole 125 arranged at the middle part of the protective circular plate 122 and is mounted on a position to be tested; the upper edge part of the protection circular plate 122 is provided with an annular closed groove 14, a closed ring 15 is arranged in the closed groove 14, and the closed ring 15 is made of elastic materials, so that in the installation process, the closed ring 15 is tightly contacted with the surface of a position to be detected, and the connection part between the connecting screw 11 and equipment to be detected is better protected by matching with the installation protection shell 12;
the specific working flow is as follows: in the mounting process, the end part of the connecting screw 11 is aligned with a reserved hole on the position to be measured, and the connecting screw 11 is rotationally embedded until being stably mounted on the position to be measured; at this time, the protection circular plate 122 on the protection shell 12 is attached to the surface of the position to be tested of the device to be tested, and the surface of the closing ring 15 positioned in the closing groove 14 is tightly attached to the area near the position to be tested, so that an annular closed protection area is formed, and impurities such as dust, moisture and the like possibly entering in the outside environment are effectively prevented; the protection ring body 121 and the protection circular plate 122 form protection for the connecting screw 11, so that possible damage to the connecting screw 11 caused by external collision in the use process can be effectively avoided, the tight and stable combination between the connecting screw 11 and the position to be detected is ensured, the interference of relative vibration between the connecting parts on the working vibration signal of the device to be detected in the sensor device is reduced, the detection accuracy is improved, the safety of the connecting screw 11 on the shell 1 is ensured, the repeated use of the connecting screw 11 is ensured, and the replacement cost is reduced;
specifically, the polysilicon wafer body 5 can timely detect the low-frequency vibration signal in the working process and convert the low-frequency vibration signal into an electric signal which can be identified by the signal processing module 4, so that after data processing is performed, the vibration primary waveform is output by the waveform output module 3 and is transmitted to external data computing processing equipment through the connected signal transmission line 2, and accurate health assessment is performed on the degradation trend generated in the driving process of the escalator driving wheel by means of envelope analysis, scrambling analysis and the like, so that the situation can be found when the equipment to be detected is excessively worn, the equipment to be detected is maintained and replaced in time, and the probability of accident occurrence is reduced;
the waveform output module 3, the signal processing module 4 and the polysilicon wafer body 5 in the application all adopt structural components which can meet the functions in the prior art, comprehensively adopt the existing technical products which can perform the special functions such as low-frequency dynamic signal trend analysis, and further strengthen and upgrade the detection accuracy of the existing vibration sensor for detecting special equipment such as the escalator driving wheel.
Example two
On the basis of the first embodiment, as shown in fig. 1-3 in the drawings of the specification, a fixed chute 16 is arranged at the bottom of the shell 1 near the connecting screw 11, fixed holes 161 are uniformly arranged on the fixed chute 16, corresponding threads are also arranged on the inner wall of the fixed hole 161, a fixed slide block 123 is arranged at the position corresponding to the fixed chute 16 on the inner side surface of the protection ring body 121, and a threaded hole is arranged on the fixed slide block 123; the length of the end part of the connecting screw 11 extending out of the mounting hole 125 is better adjusted through the movement of the fixed sliding block 123 on the fixed sliding groove 16, so that the device can adapt to different devices to be tested to a greater extent, and the application range of the device is improved;
the specific working flow is as follows: on the basis of the specific workflow in the first embodiment, during the storage and transportation process before the installation, the fixing slide block 123 is moved so that the fixing slide block 123 moves in the fixing chute 16, thereby moving the installation protecting shell 12, so that the end part of the connecting screw 11 completely enters the inner wall of the installation protecting shell 12, fixing the installation protecting shell 12 by using a fixing piece such as a fixing bolt to pass through a threaded hole on the fixing slide block 123 and a corresponding fixing hole 161 on the fixing chute 16, and sealing the installation hole 125 by using equipment such as an adhesive tape, thereby ensuring the complete sealing protection of the connecting screw 11 during the storage and transportation process;
when the installation is needed, firstly, after the fixing of the installation protecting shell 12 is released, the fixing sliding block 123 is moved to enable the connecting screw 11 to extend out of the installation hole 125, and the extending length of the connecting screw 11 is determined according to the depth of the hole reserved at the position to be detected for installation; after the connecting screw 11 extends out for a proper length, the fixing piece is used again to fix the mounting protecting shell 12, so that the extending length of the connecting screw 11 can be effectively adapted to holes with different lengths at positions to be tested, and different devices to be tested can be adapted; in this way, even if the device to be tested is not used, the protection circular plate 122 on the installation protection shell 12 can still be guaranteed to be closely attached to the surface to be tested, so that the sealing protection of the connecting part is guaranteed.
Example III
On the basis of the second embodiment, as shown in fig. 1-6 in the drawings of the specification, the interior of the closed ring 15 is hollow, and an annular air cavity 124 is arranged on the inner wall of the protective ring body 121 near the protective circular plate 122, the annular air cavity 124 is communicated with air supply equipment, the air supply equipment can be small-sized equipment capable of supplying air, such as a miniature air pump, and the like, and can be arranged on the side wall of the protective ring body 121 under appropriate conditions, the annular air cavity 124 is communicated with the interior of the closed ring 15, and the closed protection of the connecting part is ensured by inflating and colliding the closed ring 15;
the specific working flow is as follows: on the basis of the specific working flow in the second embodiment, the adjustment accuracy of the position of the mounting protecting shell 12 can only be the spacing between the fixing holes 161 uniformly distributed on the fixing chute 16, so that after the connecting screw 11 completes the relative fixing with the position to be tested in the mounting process, the protecting circular plate 122 is not contacted with the surface of the position to be tested at this time, and thus the sealing protection of the connecting part cannot be realized; at this time, the air supply device can be started, compressed air is injected into the annular air cavity 124, then the air enters the closed ring 15, the closed ring 15 is made of elastic materials, the inside is inflated and expanded, the volume is increased and rapidly fills into a gap between the protection circular plate 122 and the position to be detected, and the gap is tightly contacted with the surface of the position to be detected, so that the sealing protection of the connecting position is ensured, the relative fixation between the shell 1 and the device to be detected is prevented from being influenced by the entry of external impurities and moisture, the vibration interference is reduced, and the detection accuracy of the sensor is ensured;
when the sealing protection is not needed, the inflation of the inside of the sealing ring 15 is stopped, then the air in the inside is lost, and the deformation is recovered; the closing ring 15 is retracted into the annular closing groove 14, so that the annular closing groove 14 protects the closing ring 15 therein during installation and transportation, the situation that the closing ring is subjected to collision and abrasion is reduced, and the influence on the safety service life of the closing ring is less.
Example IV
On the basis of the third embodiment, as shown in fig. 1-8 in the drawings of the specification, a plurality of partition plates 151 are uniformly arranged on the inner wall of the closed ring 15, wherein the partition plates 151 are prepared by adopting the same material as the closed ring 15, and the partition plates 151 isolate the hollow area inside the closed ring 15 into a plurality of isolated air chambers 152 which are not communicated with each other; a plurality of air guide holes 153 are formed in the side wall of the annular air cavity 124 and correspond to the isolation air chamber 152, control air valves are arranged in the air guide holes 153, and the closing and opening of the control air valves are controlled by an external controller; the hollow area inside the closing ring 15 is isolated into a plurality of isolated air chambers 152 which are not communicated with each other, so that on one hand, the influence of the damage of the closing ring 15 on the sealing protection is reduced, and on the other hand, the stress of the connecting part is uneven through the expansion of a part area, so that the connection stability of the connecting part is tested;
the specific working flow is as follows: on the basis of the specific workflow in the third embodiment, because of misoperation in the use and installation process or running problem of equipment to be tested, damage may be caused to the surface of the closed ring 15, so that the interior of the closed ring 15 leaks, and expansion is difficult to ensure to seal and protect the connection part; and the equipment to be tested is difficult to extract out in the operation peak period and is difficult to maintain and replace; the hollow area inside the closing ring 15 is isolated into a plurality of isolated air chambers 152 which are not communicated with each other through the partition plate 151, so that the common damage only affects the sealing performance of one or two isolated air chambers 152, and at the moment, only the control air valves of the air guide holes 153 corresponding to different isolated air chambers 152 are required to be controlled to be closed, so that the control air valves corresponding to the isolated air chambers 152 at the damaged parts are in a separated state;
then the control air valves at other parts are normally started, and the isolation air chambers 152 at other normal parts are inflated, so that most parts of the closed ring 15 realize normal inflation and the connection parts are sealed and protected, so that most possibly infiltrated dust and impurities can be effectively protected, and corresponding operation can be continuously carried out until the opportunity of maintenance and replacement can be reached; therefore, the fault tolerance of the application for resisting accidents and the safety coefficient for protecting the connecting part are improved, so that the application is safer and more reliable for protecting the connecting part;
furthermore, in order to better find the weak condition of the connection part, the stability of the connection part can be tested at regular time; because the sealing ring 15 is subjected to a reaction force when expanding and extruding the position to be tested, if the connecting part is unstable and firm, the shell 1 can vibrate relative to the position to be tested due to the action of the reaction force, the two devices to be tested are not started at the moment, and the sensor judges the connection stability through the detected vibration degree and determines whether the connecting part needs to be maintained or re-reinforced;
specifically, during the test, the control air valve corresponding to the isolation air chamber 152 of a part can be started to ventilate the air, and the isolation air chamber 152 of other parts is kept closed to stop air supply, so that the part of the area on the sealing ring 15 expands and extrudes the position to be tested; like this, to the protection plectane 122, the reaction force that receives is inhomogeneous, if the junction is unstable firm, and the casing 1 for the vibration degree of the position that awaits measuring this moment is bigger, can more obvious detect the problem that the junction is not firm to in time make corresponding measure, thereby guarantee that the sensor detects the normal clear of work.
Example five
On the basis of the fourth embodiment, as shown in fig. 1-9 in the drawings of the specification, a push rod 17 is arranged at one side, close to the isolation air chamber 152, of the inside of the air guide hole 153, and the push rod 17 is slidably arranged inside the air guide hole 153; the end part of one side of the air guide hole 153, which is close to the isolation air chamber 152, is in a horn-shaped structure; the side wall of the ejector rod 17 is uniformly provided with an air guide groove 171, and air flow can smoothly pass through the air guide groove 171 and pass through a gap part between the ejector rod 17 and the air guide hole 153, so that the air flow enters the isolation air chamber 152; the side wall of the ejector rod 17 is connected with the inner wall of the air guide hole 153 through a spring;
further, a stabilizer bar 172 is arranged at one end of the ejector rod 17 far away from the air guide hole 153, and the stabilizer bar 172 is arc-shaped; the middle part of the inner wall of the closing ring 15 is provided with the stabilizing groove 154, the cross section of the stabilizing groove 154 is V-shaped, and the expansion and deformation of the closing ring 15 are more uniform under the action of the ejector rod 17 and the stabilizing rod 172;
the specific working flow is as follows: on the basis of the specific working flow in the fourth embodiment, after the air supply device is started, air flow enters through the air guide hole 153, so that the ejector rod 17 in the air guide hole 153 is impacted by the air flow and slides in the air guide hole 153, and at the moment, the stabilizer 172 on the end part of the ejector rod 17 contacts with the inner wall of the closed ring 15 after the ejector rod 17 moves, so that the inner wall of the closed ring 15 is directly pressed; in addition, as the middle part of the inner wall of the closing ring 15 is provided with the stabilizing groove 154, the middle position of the closing ring 15 is the part which is contacted with the surface of the position to be measured at the earliest, the surface of the closing ring 15 is possibly distorted and deformed due to the action of external force in the transportation and installation process, and the closing protection of the connecting part is affected;
the moving ejector rod 17 drives the stabilizer rod 172 to play a supporting role on the inner wall of the closed ring 15, the stabilizer rod 172 is arc-shaped, the radian is the same as that of the isolation air chamber 152, the stabilizer rod 172 slides on the inner wall of the stabilizer groove 154 and is embedded into the middle concave part of the stabilizer groove 154 under the guidance of the conical stabilizer groove 154, on one hand, the inner wall of the closed ring 15 is supported to expand smoothly, on the other hand, the combination of the stabilizer rod 172 and the stabilizer groove 154 enables the inner wall of the closed ring 15 to bear force, the abnormal distortion is supported to reset, and in the expansion and deformation process, the support of the stabilizer rod 172 on the inner wall of the stabilizer groove 154 enables the expansion and deformation of the inner wall of the closed ring 15 to be more uniform, so that the closed ring 15 is attached to a position to be tested more tightly, and the safety protection of a connecting part is further ensured;
further, after the closing ring 15 is fully expanded, the control air valve is closed to keep the isolation air chamber 152 closed, and the ejector rod 17 is not pushed by the impact air flow and is reset under the action of the connected spring; when the closing ring 15 is required to be reset, only the operation of the air supply equipment is required to be closed, and the control air valve is opened, so that the air flow reversely flows and overflows under the action of the tension on the side wall of the closing ring 15, and the closing ring 15 is deformed and reset.
Example six
On the basis of the fifth embodiment, as shown in fig. 1-9 in the drawings of the specification, an annular cleaning air cavity 18 is arranged in the protective circular plate 122, and the cleaning air cavity 18 is communicated with an annular air cavity 124 through an air duct 181; the inner wall of the mounting hole 125 is uniformly provided with a cleaning hole 182, the cleaning hole 182 is obliquely directed to the outer side of the mounting hole 125, and the cleaning hole 182 is communicated with the interior of the cleaning air cavity 18;
further, the outer surface of the protection circular plate 122 is uniformly provided with the guide grooves 183, the guide grooves 183 are annularly distributed around the mounting holes 125, and the guide grooves 183 extend into the closed groove 14; the connection part and the gap part are washed and cleaned through the cleaning hole 182 and the drainage groove 183, so that the stability and the firmness of the connection part are further ensured;
the specific working flow is as follows: on the basis of the specific working flow in the fifth embodiment, under the protection of the closing ring 15, impurities with larger particles such as external dust and impurities can be effectively prevented, but in the ring shape with larger humidity such as overcast and rainy weather, air with larger humidity can possibly pass through a gap part between the closing ring 15 and a position to be tested, and moisture is liquefied at a joint part of the connecting screw 11 and the position to be tested, so that the humidity of the part is increased, the corrosion is aggravated, and the service life of the connecting part is influenced; therefore, the cleaning air cavity 18 is arranged, a maintainer controls a control air valve of the air guide hole 153 to be opened through a starting controller at regular time, air is discharged, the closing ring 15 is reset, and a gap between the protective circular plate 122 and a position to be tested is opened at the moment;
then all control air valves are closed, the control air valves arranged on the air guide pipe 181 are opened, then the air supply equipment is started, so that the annular air cavity 124 supplies air to the inside of the cleaning air cavity 18 through the air guide pipe 181, then the cleaning air cavity 18 flows out of air through the cleaning hole 182, the end part of the connecting screw 11 and the joint part of the position to be tested are flushed, under the flushing action of flowing air, accumulated moisture and dust impurities possibly existing in the air are accelerated to leave, and under the action of flowing air, the accumulated moisture and dust impurities are separated from the joint part through a clearance part between the closing ring 15 and the position to be tested, so that the firmness of the joint part is ensured, and the normal operation of the sensor is ensured;
and because of the action of the drainage groove 183, the air passing through the gap between the protection circular plate 122 and the position to be measured can more uniformly wash the surfaces of the protection circular plate 122 and the position to be measured under the action of the drainage groove 183, so that the surfaces can be effectively cleaned; the diversion trench 183 extends into the closed trench 14, so that the flowing air flushes the surface of the closed loop 15, thereby cleaning dust and moisture possibly accumulated on the surface of the closed loop 15, reducing corrosion to the surface of the closed loop 15 and ensuring the service life thereof; after a period of flushing, the control valve of the air duct 181 is closed, and the control valve of the air duct 153 is opened again, so that the closing ring 15 is expanded, and the closing protection of the connecting part is restored.
The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (7)
1. The utility model provides a special equipment low frequency dynamic signal trend analysis sensor, includes casing (1), connecting screw (11), installation protecting crust (12), signal transmission line (2), wave form output module (3), signal processing module (4) and polycrystalline silicon wafer body (5), connecting screw (11) fixed mounting is in casing (1) bottom, wave form output module (3), signal processing module (4) and polycrystalline silicon wafer body (5) are all installed inside casing (1);
the signal transmission line (2) penetrates through an outlet (13) arranged at the top of the shell (1) and stretches into the shell (1) and is communicated with the waveform output module (3), and the waveform output device is characterized in that: the installation protecting shell (12) is arranged at the bottom of the shell (1) and positioned at the positions of the two sides of the connecting screw (11);
the mounting protective shell (12) comprises a protective ring body (121) and a protective circular plate (122), the protective ring body (121) is mounted at the bottom of the shell (1), and the protective circular plate (122) is mounted on the protective ring body (121) and is opposite to one end of the connecting screw (11); the end part of the connecting screw (11) passes through a mounting hole (125) arranged in the middle part of the protection circular plate (122);
an annular closing groove (14) is formed in the edge part of the surface of the protection circular plate (122), a closing ring (15) is arranged in the closing groove (14), and the closing ring (15) is made of elastic materials;
the inside of the closed ring (15) is hollow, an annular air cavity (124) is arranged on the inner wall of the protective ring body (121) near the protective circular plate (122), the annular air cavity (124) is communicated with air supply equipment, and the annular air cavity (124) is communicated with the inside of the closed ring (15).
2. The special equipment low-frequency dynamic signal trend analysis sensor according to claim 1, wherein: the bottom of the shell (1) is provided with a fixed chute (16) near the part of the connecting screw (11), the fixed chute (16) is uniformly provided with fixed holes (161), the part corresponding to the fixed chute (16) on the inner side surface of the protective ring body (121) is provided with a fixed slide block (123), and the fixed slide block (123) is provided with a threaded hole.
3. The special equipment low-frequency dynamic signal trend analysis sensor according to claim 1, wherein: a plurality of partition plates (151) are uniformly arranged on the inner wall of the closed ring (15), and the partition plates (151) isolate the hollow area inside the closed ring (15) into a plurality of isolated air chambers (152) which are not communicated with each other;
the side wall of the annular air cavity (124) is provided with a plurality of air guide holes (153) at positions corresponding to the isolation air chamber (152), and control air valves are arranged in the air guide holes (153).
4. A special equipment low frequency dynamic signal trend analysis sensor according to claim 3, characterized in that: a push rod (17) is arranged at one side, close to the isolation air chamber (152), inside the air guide hole (153), and the push rod (17) is slidably arranged inside the air guide hole (153); the end part of one side of the air guide hole (153) close to the isolation air chamber (152) is in a horn-shaped structure; the side wall of the ejector rod (17) is uniformly provided with air guide grooves (171); and the side wall of the ejector rod (17) is connected with the inner wall of the air guide hole (153) through a spring.
5. The special equipment low-frequency dynamic signal trend analysis sensor according to claim 4, wherein: a stabilizing rod (172) is arranged at one end part of the ejector rod (17) far away from the air guide hole (153), and the stabilizing rod (172) is arc-shaped; and a stabilizing groove (154) is arranged at the middle part of the inner wall of the closing ring (15), and the cross section of the stabilizing groove (154) is V-shaped.
6. The special equipment low-frequency dynamic signal trend analysis sensor according to claim 1, wherein: an annular cleaning air cavity (18) is arranged in the protective circular plate (122), and the cleaning air cavity (18) is communicated with the annular air cavity (124) through an air duct (181);
the inner wall of the mounting hole (125) is uniformly provided with a cleaning hole (182), the cleaning hole (182) is obliquely directed to the outer side of the mounting hole (125), and the cleaning hole (182) is communicated with the inside of the cleaning air cavity (18).
7. The special equipment low-frequency dynamic signal trend analysis sensor according to claim 6, wherein: the outer surface of the protection circular plate (122) is uniformly provided with drainage grooves (183), the drainage grooves (183) are annularly distributed around the mounting holes (125), and the drainage grooves (183) extend into the closed grooves (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310043202.3A CN115876307B (en) | 2023-01-29 | 2023-01-29 | Low-frequency dynamic signal trend analysis sensor for special equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310043202.3A CN115876307B (en) | 2023-01-29 | 2023-01-29 | Low-frequency dynamic signal trend analysis sensor for special equipment |
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| CN115876307A CN115876307A (en) | 2023-03-31 |
| CN115876307B true CN115876307B (en) | 2023-05-16 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR100289432B1 (en) * | 1999-02-25 | 2001-05-02 | 구자홍 | Apparatus for fixing sensor water level/vibration of washing machine |
| CN105953838B (en) * | 2016-06-17 | 2019-04-05 | 中国铁道科学研究院金属及化学研究所 | Locomotive traction motor bearing on-line monitoring temperature disturbance compound sensor |
| CN107238430A (en) * | 2017-05-27 | 2017-10-10 | 天府认证有限公司 | Can noise reduction piezoelectric vibration pickup |
| CN208076020U (en) * | 2018-04-10 | 2018-11-09 | 扬州熙源电子科技有限公司 | A kind of piezoelectric type vibration velocity sensor with integrating function |
| CN111650280A (en) * | 2020-06-19 | 2020-09-11 | 国电锅炉压力容器检验有限公司 | Bolt fracture online monitoring and alarming device and method |
| CN112033526B (en) * | 2020-08-10 | 2023-01-24 | 无锡韦感半导体有限公司 | Vibration sensor and method for manufacturing the same |
| CN113884174A (en) * | 2021-09-09 | 2022-01-04 | 国家石油天然气管网集团有限公司华南分公司 | Piezoelectric vibration sensor of compression type sensitive element |
| CN216770777U (en) * | 2021-12-21 | 2022-06-17 | 郑州易度传感技术有限公司 | Small vibration measuring sensor |
| CN216696381U (en) * | 2021-12-22 | 2022-06-07 | 上海道鲲科技有限公司 | Acceleration sensor for train axle vibration detection |
| CN216593775U (en) * | 2021-12-30 | 2022-05-24 | 江阴市第三电子仪器有限公司 | Three-axis vibration sensor |
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