CN105973339B - Vibrating material level switch and vibrating device thereof - Google Patents
Vibrating material level switch and vibrating device thereof Download PDFInfo
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- CN105973339B CN105973339B CN201610511184.7A CN201610511184A CN105973339B CN 105973339 B CN105973339 B CN 105973339B CN 201610511184 A CN201610511184 A CN 201610511184A CN 105973339 B CN105973339 B CN 105973339B
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- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
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Abstract
The application discloses vibrating material level switch and vibrating device thereof. The vibrating device comprises a piezoelectric component, a lower bridging block, a transition body, a diaphragm, a pressing piece, a positioning mechanism and the like. The piezoelectric assembly is abutted against the lower bridging block, and the vibration generated by the piezoelectric assembly is transmitted to the lower bridging block. Gaps are reserved between the transition body and the piezoelectric assembly and between the transition body and the lower bridging block, and the lower bridging block is supported and positioned through a support body. The diaphragm is fixedly sleeved on the transition body, one end of the pressing piece is fixed with the lower bridging block, and the other end of the pressing piece abuts against the diaphragm to transmit the vibration of the lower bridging block to the diaphragm. The positioning mechanism is abutted to the upper end of the piezoelectric assembly and compresses the piezoelectric assembly on the lower bridging block through the abutment. All there is the clearance between transition body and piezoelectric assembly, lower bridging piece and the piece that compresses tightly, consequently can not exert an influence to the transmission of the vibration that piezoelectric assembly produced and vibration to guarantee vibrating device's reliability and life-span.
Description
Technical Field
The present application relates to vibrating level switches, and more particularly to vibrating devices in vibrating level switches.
Background
In modern industrial and agricultural production, the storage amount of plastic granules, coal powder, grains, flour and other granules or powdery solids is often controlled, and the accurate position of the plastic granules, the coal powder, the grains, the flour and other granules or powdery solids is often required to be detected.
The vibration type material level switch is a high-sensitivity vibration type material level switch formed by a piezoelectric element and a mechanical resonance structure. The control circuit outputs voltage signals to excite the piezoelectric element to drive the matched mechanical element to generate resonance, and the resonance is transmitted to the detection probe. When the material to be measured covers the detection probe in vibration, the vibration amplitude of the material is reduced sharply due to the damping effect generated by the material, and the information of the mechanical vibration change is converted into an electric signal through the detection receiver and transmitted to the control circuit, so that the measurement and control of the position of the material are realized. The vibrating material level switch is mainly suitable for controlling and detecting solid particles or powdery materials in a bin or a container, and is particularly suitable for substances which are easy to form hanging and clamping and substances with poor liquidity.
The existing vibrating material level switch adopts a double-tube vibrating structure, vibrates under the excitation of a piezoelectric ceramic piece and is transmitted to a diaphragm through a tension rod, the diaphragm transmits the vibration to a vibrating outer tube, and the vibrating outer tube and the vibrating inner tube resonate under the resonance condition; when the vibration outer tube receives the damping of material, the load grow, with the unable resonance that produces of vibration inner tube, the vibration stops, and piezoelectric assembly detects this change, converts control circuit output into, and the detection that has or not as the material.
However, the following disadvantages exist in the prior art:
among the current double-barrelled vibrating structure, drive piezoceramics takes place the contraction expansion through inverse piezoelectric effect and produces the vibration, and the vibration is through taut, bridging piece and compress tightly on piece transmits diaphragm and vibration outer tube to make the vibration outer tube play vibration, the vibration of vibration outer tube leads to the vibration inner tube to produce the sympathetic vibration, and when double-barrelled free vibration frequency was unanimous, double-barrelled production resonance. When vibration is transmitted through the tension rod, because no gap or small gap exists between the tension rod and the piezoelectric component, vibration friction is easily caused, the vibration friction causes the loss of vibration energy, the loss of the vibration energy can enable the vibration to become weak or incapable of vibrating, the vibration characteristic is influenced, and the reliability and the service life of the vibration device are influenced.
Disclosure of Invention
The present application provides a novel vibrating device for a vibrating level switch and a vibrating level switch employing such a vibrating device.
The application provides a vibration device, includes:
a piezoelectric assembly for generating and detecting vibrations;
the piezoelectric assembly is abutted to the lower bridging block and transmits the generated vibration to the lower bridging block;
gaps are reserved between the transition body and the piezoelectric assembly and between the transition body and the lower bridging block, and the lower bridging block is supported and positioned through a support body;
the diaphragm is fixedly sleeved on the transition body;
the pressing piece is provided with a gap with the transition body, one end of the pressing piece is fixed with the lower bridging block, and the other end of the pressing piece abuts against the diaphragm to transmit vibration to the diaphragm;
the positioning mechanism is connected to the transition body, is abutted against one end of the piezoelectric assembly for detecting vibration, and is pressed on the lower bridging block through abutment;
the vibration outer pipe is fixedly connected with the diaphragm;
and the vibration inner pipe is fixedly connected with the transition body.
As a further improvement of the vibration device, the lower bridging block is provided with a first groove, the transition body is provided with a second groove, the support body is installed in a cavity defined by the first groove and the second groove, and the support body at least has a spherical outer wall at a part matched with the first groove and the second groove.
As a further improvement of the vibration device, the first groove and the second groove have the same groove diameter, and the depth of the second groove is greater than that of the first groove, so that the part of the support body located in the second groove is greater than that located in the first groove.
As a further improvement of the vibration device, a boss is arranged on one side, facing the piezoelectric assembly, of the lower bridging block, and a positioning hole is arranged on one side, facing the boss, of the piezoelectric assembly, and the boss is matched with the positioning hole.
As a further improvement of the vibration device, the transition body is provided with a through hole, the lower bridging block is positioned above the through hole, the diaphragm is arranged below the through hole, the pressing piece penetrates through the through hole to press the diaphragm, and a gap is formed between the pressing piece and the hole wall of the through hole.
As a further improvement of the vibration device, the positioning mechanism includes an upper bridging block that is pressed against an upper end of the piezoelectric assembly.
As the further improvement of the vibration device, the transition body comprises a disk body and a hanging arm formed by extending from the protrusion of one side of the disk body, the positioning mechanism further comprises a fixing piece, one end of the upper bridging block transversely penetrates through a through hole of the hanging arm to be installed on the hanging arm, and the fixing piece penetrates through a matching hole at the other end of the upper bridging block from top to bottom and is locked on the disk body.
As a further improvement of the vibration device, the positioning mechanism further comprises two fixing pieces which are arranged side by side, and the fixing pieces respectively penetrate through two ends of the upper bridging block and are locked on the transition body.
As a further improvement of the vibration device, the transition body comprises a disk body and two hanging arms formed by extending from protrusions on two sides of the disk body, the positioning mechanism comprises an upper bridging block and a pre-tightening bolt, the upper bridging block is transversely installed on the two hanging arms, a threaded hole is formed in the upper bridging block, the pre-tightening bolt is screwed in the threaded hole, and the lower end of the pre-tightening bolt abuts against the piezoelectric assembly.
The application provides a vibrating material level switch, including control circuit, still include as above-mentioned any one the vibrating device, control circuit is connected with the piezoelectric component among the vibrating device.
The beneficial effect of this application is:
the application provides a vibrating device, it includes piezoelectric assembly, lower bridging piece, transition body, diaphragm, compresses tightly piece, positioning mechanism, vibration outer tube and vibration inner tube. The piezoelectric assembly abuts against the lower bridging block and transmits vibration generated by the piezoelectric assembly to the lower bridging block. Gaps are reserved between the transition body and the piezoelectric assembly and between the transition body and the lower bridging block, and the lower bridging block is supported and positioned through a support body. The diaphragm is fixedly sleeved on the transition body, a gap is formed between the pressing piece and the transition body, one end of the pressing piece is fixed with the lower bridging block, and the other end of the pressing piece abuts against the diaphragm to transmit vibration to the diaphragm. Positioning mechanism connects on the transition body to the one end that butt piezoelectric assembly is used for detecting the vibration, transmits the vibration that detects to piezoelectric assembly and compresses tightly piezoelectric assembly on the bridging piece down. All there is the clearance between transition body and piezoelectric assembly, lower bridging piece and the piece that compresses tightly, consequently can not exert an influence to the transmission of the vibration that piezoelectric assembly produced and vibration, guarantees vibrating device's reliability and life-span.
Drawings
FIG. 1 is a cross-sectional view of a first embodiment of a vibratory device of the vibrating level switch of the present application;
FIG. 2 is another cross-sectional view of the first embodiment of the vibratory device of the vibrating level switch of the present application;
FIG. 3 is a schematic view of a first embodiment of a vibratory device of the vibrating level switch of the present application;
FIG. 4 is a schematic view from another perspective of the first embodiment of the vibrating device of the vibrating level switch of the present application;
FIG. 5 is a schematic structural view of a transition body according to the first embodiment;
FIG. 6 is a schematic view of the transition body of FIG. 5 from another perspective;
FIG. 7 is a schematic structural view of a lower bridging block in the first embodiment;
FIG. 8 is a schematic view of the lower bridge block shown in FIG. 7 from another perspective;
FIG. 9 is a schematic structural view of an upper bridging block in the first embodiment;
FIG. 10 is a cross-sectional view of a second embodiment of a vibratory device of the vibrating level switch of the present application;
FIG. 11 is another cross-sectional view of a second embodiment of a vibratory device of the vibrating level switch of the present application;
FIG. 12 is a schematic view of a second embodiment of a vibratory device of the vibrating level switch of the present application;
FIG. 13 is a schematic structural view of a transition body in the second embodiment;
FIG. 14 is a cross-sectional view of a third embodiment of a vibratory device of the vibrating level switch of the present application;
FIG. 15 is another cross-sectional view of a third embodiment of a vibratory device of the vibrating level switch of the present application;
FIG. 16 is a schematic view of a third embodiment of a vibratory device of the vibrating level switch of the present application;
FIG. 17 is a schematic structural view of a transition body in the third embodiment;
fig. 18 is a schematic structural diagram of an upper bridging block in the third embodiment.
Detailed Description
The present invention will be described in further detail with reference to the following detailed description and accompanying drawings. The present application may be embodied in many different forms and is not limited to the embodiments described in the present embodiment. The following detailed description is provided to facilitate a clear and thorough understanding of the present disclosure, and the words upper, lower, left, right, etc. used to indicate orientation are simply for the purpose of illustrating the structure in the corresponding figures.
One skilled in the relevant art will recognize, however, that one or more of the specific details can be omitted, or other methods, components, or materials can be used. In some instances, some embodiments are not described or not described in detail.
Furthermore, the technical features, aspects or characteristics described herein may be combined in any suitable manner in one or more embodiments. It will be readily appreciated by those of skill in the art that the order of the steps or operations of the methods associated with the embodiments provided herein may be varied. Thus, any sequence in the figures and examples is for illustrative purposes only and does not imply a requirement in a certain order unless explicitly stated to require a certain order.
The numbering of the components as such, e.g., "first", "second", etc., is used herein only to distinguish the objects as described, and does not have any sequential or technical meaning. The term "connected" and "coupled" when used in this application, unless otherwise indicated, includes both direct and indirect connections (couplings).
The first embodiment is as follows:
the first embodiment provides a vibrating device of a vibrating material level switch.
Referring to fig. 1 to 5, the vibration device includes:
a piezoelectric assembly 10 for generating and detecting vibrations;
a lower bridge block 20, which is abutted against the piezoelectric assembly 10 and transmits the vibration generated by the piezoelectric assembly to the lower bridge block 20;
a transition body 30, wherein gaps are formed between the transition body 30 and the piezoelectric assembly 10 and between the transition body 30 and the lower bridging block 20, and the lower bridging block 20 is supported and positioned by a support body 90;
a membrane 40, wherein the membrane 40 is fixedly sleeved on the transition body 30;
a pressing piece 60, a gap is formed between the pressing piece 60 and the transition body 30, one end of the pressing piece 60 is fixed with the lower bridging block 20, and the other end of the pressing piece 60 is tightly pressed against the membrane 40, so that the vibration of the lower bridging block 20 is transmitted to the membrane 40;
a positioning mechanism (51, 52 in fig. 1-4 are embodiments of an embodiment of the positioning mechanism) connected to the transition body 30 and abutting the upper end of the piezoelectric assembly 10, pressing the piezoelectric assembly 10 against the lower bridging block 20 by the abutment;
a vibration outer tube 70, the vibration outer tube 70 being fixedly coupled with the diaphragm 40;
and a vibrating inner tube 80, the vibrating inner tube 80 being fixedly coupled to the transition body 30.
In this vibration device, since there are gaps between the transition body 30 and the piezoelectric element 10, and between the lower bridge block 20 and the pressing member 60, the vibration generated in the piezoelectric element 10 and the transmission of the vibration are not affected, and the transmission of the vibration is not attenuated, thereby preventing the change of the vibration characteristics due to the attenuation of the vibration.
Meanwhile, the structure is easy to process and convenient to produce and assemble, so that the production cost can be reduced, and the production efficiency and the economic benefit can be improved.
Referring to fig. 2, the piezoelectric assembly 10 is used for generating and detecting vibration, and may include a detecting piezoelectric ceramic 12 and a driving piezoelectric ceramic 11, where the detecting piezoelectric ceramic 12 may have only one piece, and the driving piezoelectric ceramic 11 may have six pieces.
Further, the positioning mechanism is used to abut the piezoelectric assembly 10, pressing the piezoelectric assembly 10 against the lower bridging block 20. At the same time, the vibration is transmitted to the detection piezo-ceramic 12 of the piezo-element 10.
The positioning mechanism may include an upper bridging block 51, the upper bridging block 51 is pressed against the upper end of the piezoelectric element 10, and the contact (except the necessary contact) between the piezoelectric element 10 and the positioning mechanism may be reduced or not reduced except the upper bridging block 51. As to the structure by which the upper bridge piece 51 is pressed against the piezoelectric element 10, various designs are possible.
Specifically, referring to fig. 1 to 6 and 8, in the exemplary structure of the positioning mechanism provided in this embodiment, the transition body 30 includes a tray 31 and a hanging arm 32 formed by extending and protruding from one side of the tray 31. The positioning mechanism further comprises a fixing member 52, one end of the upper bridging block 51 transversely passes through the through hole 321 of the hanging arm 32 and is mounted on the hanging arm 32, and the fixing member 52 passes through the matching hole 514 at the other end of the upper bridging block 51 from top to bottom and is locked on the disc body 31.
The disk 31 may be a disk shape, the hanging arm 32 may be a similar square column shape, and one side 322 of the inner side of the hanging arm may be concave toward the inner side according to a certain radian, so that a gap is formed between the piezoelectric component 10 and the transition body 30, thereby avoiding the piezoelectric component 10 and enabling the transmission of vibration not to be attenuated. The disk body 31 and the hanging arm 32 can be of an integrated structure, the rigidity of the transition body 30 is good due to the structure, the structure is firm, vibration can be better transmitted, and therefore sufficient rigid coupling can be achieved between the piezoelectric assembly 10 and the diaphragm 40, and the reliability of material level detection can be guaranteed.
Referring to fig. 9, the upper bridge block 51 may include a cylindrical cylinder 511 and a rectangular parallelepiped 512 having an upper and lower through hole 513, and the cylinder 511 and the rectangular parallelepiped 512 are integrated. The upper portion of the hanging arm 32 is formed with a circular through hole 321 in the cylindrical body 511 facing the upper bridge block 51, and the diameter of the circular through hole 321 is slightly larger than the diameter of the cylindrical body 511, so that the cylindrical body 511 is positioned across the piezoelectric element 10 through the circular through hole 321.
In the present embodiment, an adjusting bolt is used as the fixing member 52, and the adjusting bolt 52 can be adjusted. Referring to fig. 9, the upper bridge block 51 is also provided with a vertically through-going fitting hole 514, and the adjusting bolt 52 passes through the fitting hole 514 of the upper bridge block 51 from top to bottom and is screwed and locked with the transition body 30.
The adjusting bolt 52 can be directly locked on the disc 31, or as shown in fig. 1, 5 and 6, the disc 31 is convexly provided with a mounting body 33, a groove is formed between the mounting body 33 and the hanging arm 32, the lower bridging block 20 is arranged between the hanging arm 32 and the mounting body 33 and forms a gap with the hanging arm 32 and the mounting body 33, and the adjusting bolt 52 is locked on the mounting body 33.
The outer sides of the hanging arm 32 and the mounting body 33 are provided with arc-shaped outer walls, and the hanging arm 32, the disc body 31 and the mounting body 33 can be of an integrated structure.
In order to transmit the vibration to the diaphragm 40 as losslessly as possible, the lower bridge block 20 is located between the mounting body 33 and the suspension arm 32, and is spaced apart from the mounting body 33 and the suspension arm 32 by a gap in the left-right direction. Such a gap allows the mounting body 33 and the hanger arm 32 to be in no direct contact with the lower bridge block 20, thereby avoiding vibration loss due to friction.
Further, in order to achieve a better positioning effect between the transition body 30 and the lower bridge block 20, the supporting body 90 may be designed to have a spherical outer wall in part or be a sphere in whole. Referring to fig. 2 and fig. 5 to 8, the lower bridging block 20 has a first groove 24, the transition body 30 has a second groove 312, the supporting body 90 is installed in a cavity defined by the first groove 24 and the second groove 312, and at least a portion of the supporting body 90, which is matched with the first groove 24 and the second groove 312, has a spherical outer wall.
The first and second grooves 24 and 312 may be spherical, which form a sphere, and the support 90 may be a ball, which is placed in the first and second grooves 24 and 312 to better position the plate 31 and the lower bridge block 20.
The first groove 24 and the second groove 312 have the same groove diameter, and the depth of the second groove 312 is greater than that of the first groove 24, so that the portion of the support body 90 located in the second groove 312 is greater than that located in the first groove 24.
Further, the piezoelectric element 10 directly abuts on the upper portion of the lower bridge block 20. Referring to fig. 2 and 7, the vibration device may further include a piezoelectric insulating sleeve 13, the piezoelectric insulating sleeve 13 is sleeved outside the piezoelectric assembly 10, the lower bridging block 20 has two circular grooves 22, and the piezoelectric insulating sleeve 13 is sleeved on the lower bridging block 20 through the grooves 22 and is pressed and positioned through the grooves 22.
With continued reference to fig. 2 and 7, the side of the lower bridge block 20 facing the piezoelectric element 10 has a boss 21, the side of the piezoelectric element 10 facing the boss has a positioning hole, and the boss 21 is engaged with the positioning hole. The boss 21 extends into the circular hole, thereby functioning to support the piezoelectric assembly 10.
Referring to fig. 2, the transition body 30 has a through hole 311, the lower bridge block 20 is located above the through hole 311, the membrane 40 is installed below the through hole 311, the pressing member 60 penetrates through the through hole 311 to press the membrane 40, and a gap is formed between the pressing member 60 and a wall of the through hole 311.
Specifically, the upper part of the pressing member 60 is screwed to the lower bridge block 20. As shown in fig. 2, the pressing member 60 is divided into an upper portion, a middle portion and a lower portion. The middle portion has a ring of bosses and the portion of the compression member 60 above the bosses is the upper portion and the portion below the bosses is the lower portion, the upper portion being threadably secured to the lower bridge block 20. The through hole 311 of the plate 31 is in the shape of a stepped hole, the middle and lower portions of the pressing member 60 extend into the stepped hole 311, and the lower portion extends from the stepped hole 311 to abut against the diaphragm 40.
In order to transmit the vibration generated by the piezoelectric assembly 10 to the diaphragm 40 without loss as much as possible, the pressing member 60 may be disposed in the stepped hole 311 in a friction-free and preferably contact-free manner, and the size of the pressing member 60 is smaller than the diameter of the stepped hole 311, that is, the pressing member 60 has a gap with the hole wall of the stepped hole 311, and the gap may ensure that the pressing member 60 does not contact the hole wall of the stepped hole 311, thereby avoiding the vibration loss caused by friction and enabling the vibration to be transmitted better.
Referring to fig. 2 and 8, the lower bridge block 20 has a threaded hole 23, and the upper portion of the pressing member 60 is screwed with the threaded hole 23 of the lower bridge block 20.
Referring to fig. 1 and 2, the outer vibrating tube 70 is sleeved outside the inner vibrating tube 80, and a gap is formed between the outer vibrating tube 70 and the inner vibrating tube 80 at a certain distance. Wherein the vibration inner tube 80 is fixedly coupled to the lower portion of the transition body 30, for example, by welding. The membrane 40 is sleeved on the transition body 30 and fixed with the transition body 30. The vibration outer tube 70 is fixedly coupled to the diaphragm 40, for example, by welding. The vibrating inner tube 80 has an internal cavity with internal threads and a mass movable therein by threaded rotation.
In the present embodiment, a gap is formed between the piezoelectric element 10 and the adjusting bolt 52 and between the piezoelectric element 10 and the suspension arm 32. Therefore, the vibration generated by the piezoelectric component 10 can be transmitted in a friction-free mode as much as possible, and the vibration energy loss caused by friction is reduced as much as possible, so that the detection is more reliable, and the detection accuracy is improved.
In this embodiment, the driving piezoelectric ceramic 11 generates contraction and expansion to generate vibration through the inverse piezoelectric effect, and the vibration is transmitted to the diaphragm 40 and the vibration outer tube 70 through the positioning mechanism, the lower bridging block 20 and the pressing piece 60, so that the vibration outer tube 70 starts to vibrate, the vibration of the vibration outer tube 70 causes the vibration inner tube 80 to generate resonance vibration, and when the free vibration frequencies of the two tubes are consistent, resonance is generated, and the vibration amplitude reaches the maximum at this time. Accordingly, when the vibration outer tube 70 is damped by the material, the load becomes large, the vibration can not generate resonance with the vibration inner tube 80, the vibration stops, the vibration of the double tube is transmitted to the detection piezoelectric ceramic 12 through the diaphragm 40, the pressing piece 60, the lower bridging block 20 and the positioning mechanism, the detection piezoelectric ceramic 12 generates a detection signal, and the detection signal is output to the control circuit for processing.
Example two:
the second embodiment provides a vibrating device of the second vibrating type material level switch.
The present vibration device differs from the first embodiment in that another positioning mechanism is provided.
Referring to fig. 10-13, the positioning mechanism of the second embodiment includes two fixing members 52 disposed side by side, and the fixing members 52 respectively penetrate through two ends of the upper bridging block 51a and are locked on the transition body 30 a.
Specifically, the transition body 30a includes a disk 31, and the disk 31 may be a circular disk. Two mounting seats 34 are provided on the plate 31, and like the hanging arm and the mounting body in the first embodiment, a groove is formed between the two mounting seats 34, and the lower bridge block 20 is mounted in the groove with a gap from both of the two mounting seats 34.
The upper bridging block 51a may have two left and right matching holes, and the fixing member 52 may also be an adjusting bolt, and the two adjusting bolts 52 respectively pass through the two matching holes of the upper bridging block 51a from top to bottom and are locked in the threaded hole of the mounting base 34, so as to press and position the upper bridging block 51a and the piezoelectric component by screwing.
Of course, the two adjustment bolts 52 may be directly screwed to the disc 31.
Example three:
the third embodiment provides a vibrating device of the third vibrating type level switch.
The present vibration device differs from the first and second embodiments in that another positioning mechanism is provided.
Referring to fig. 14 to 18, in the structure shown in the third embodiment, the transition body 30b includes a disk 31 and two hanging arms 32 formed by protruding and extending from two sides of the disk 31, the positioning mechanism includes an upper bridging block 51b and a pre-tightening bolt 54, the upper bridging block 51b is transversely installed on the two hanging arms 32, the upper bridging block 51b has a threaded hole 511b, the pre-tightening bolt 54 is screwed into the threaded hole 511b, and the lower end of the pre-tightening bolt 54 presses against the piezoelectric element 10 to pre-tighten the piezoelectric element. .
Specifically, one side of the upper portion of the hanging arm 32 is a block-shaped groove 323, the size of the groove 323 is slightly larger than that of the upper bridging block 51b, and the upper bridging block 51b is embedded in the groove 323.
Example four
The fourth embodiment provides a vibrating type material level switch, which comprises a control circuit and a vibrating device according to any one of the above embodiments, wherein the control circuit is connected with a piezoelectric component in the vibrating device.
The foregoing is a more detailed description of the present invention that is presented in conjunction with specific embodiments, and the practice of the invention is not to be considered limited to those descriptions. It will be apparent to those skilled in the art that a number of simple derivations or substitutions can be made without departing from the inventive concept.
Claims (10)
1. A vibratory device of a vibratory level switch, comprising:
a piezoelectric assembly for generating and detecting vibrations;
the piezoelectric assembly is abutted to the lower bridging block and transmits the generated vibration to the lower bridging block;
gaps are reserved between the transition body and the piezoelectric assembly and between the transition body and the lower bridging block, and the lower bridging block is supported and positioned through a support body;
the diaphragm is fixedly sleeved on the transition body;
the pressing piece is provided with a gap with the transition body, one end of the pressing piece is fixed with the lower bridging block, and the other end of the pressing piece abuts against the diaphragm to transmit vibration to the diaphragm;
the positioning mechanism is connected to the transition body, abuts against the upper end of the piezoelectric assembly and presses the piezoelectric assembly onto the lower bridging block through abutting;
the vibration outer pipe is fixedly connected with the diaphragm;
and the vibration inner pipe is fixedly connected with the transition body.
2. The vibration apparatus as claimed in claim 1, wherein the lower bridge block is provided with a first recess, the transition body is provided with a second recess, the support body is installed in a cavity defined by the first recess and the second recess, and the support body has a spherical outer wall at least at a portion thereof engaged with the first recess and the second recess.
3. The vibration apparatus as claimed in claim 2, wherein the first and second recesses have the same groove diameter, and the depth of the second recess is greater than the depth of the first recess, so that the support body is located in the second recess in a greater portion than the first recess.
4. The vibration apparatus as claimed in claim 1, wherein a side of the lower bridge block facing the piezoelectric element has a boss, and a side of the piezoelectric element facing the boss has a positioning hole, and the boss is engaged with the positioning hole.
5. The vibration apparatus of claim 1 wherein the transition body has a through hole, the lower bridge block is positioned above the through hole, the diaphragm is mounted below the through hole, the pressing member passes through the through hole to press the diaphragm, and the pressing member has a gap with the wall of the through hole.
6. Vibrating device according to any one of claims 1 to 5, wherein the positioning means comprise an upper bridging block which is pressed against the upper end of the piezoelectric assembly.
7. The vibration apparatus as claimed in claim 6, wherein the transition body comprises a plate body and a hanging arm formed by extending from one side of the plate body in a protruding manner, the positioning mechanism further comprises a fixing member, one end of the upper bridging block transversely passes through the through hole of the hanging arm and is mounted on the hanging arm, and the fixing member passes through the matching hole at the other end of the upper bridging block from top to bottom and is locked on the plate body.
8. The vibration apparatus as claimed in claim 6, wherein the positioning mechanism further comprises two fixing members arranged side by side, the fixing members passing through both ends of the upper bridging block and being locked to the transition body, respectively.
9. The vibration apparatus as claimed in any one of claims 1 to 5, wherein the transition body comprises a disk body and two hanging arms formed by respectively protruding from two sides of the disk body, the positioning mechanism comprises an upper bridging block and a pre-tightening bolt, the upper bridging block is transversely installed on the two hanging arms, the upper bridging block is provided with a threaded hole, the pre-tightening bolt is screwed in the threaded hole, and the lower end of the pre-tightening bolt presses against the piezoelectric assembly.
10. A vibrating level switch comprising a control circuit, further comprising a vibrating device according to any one of claims 1 to 9, the control circuit being connected to a piezoelectric assembly in the vibrating device.
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| CN108598751B (en) * | 2018-07-05 | 2023-10-20 | 上海思方电气技术有限公司 | Open-circuit-preventing electric connector |
| CN109960848B (en) * | 2019-01-17 | 2022-05-10 | 哈尔滨工程大学 | Mode avoiding method for avoiding resonance |
| RU2713987C1 (en) * | 2019-04-16 | 2020-02-11 | Олег Владимирович Зацерклянный | Device for monitoring of limit level in reservoir and/or pipeline |
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