CN203268752U - Material level detecting device used in material storage tank - Google Patents
Material level detecting device used in material storage tank Download PDFInfo
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- CN203268752U CN203268752U CN 201320199656 CN201320199656U CN203268752U CN 203268752 U CN203268752 U CN 203268752U CN 201320199656 CN201320199656 CN 201320199656 CN 201320199656 U CN201320199656 U CN 201320199656U CN 203268752 U CN203268752 U CN 203268752U
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- storage tank
- detecting device
- moving plate
- level detecting
- housing
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Abstract
The utility model relates to a material level detecting device used in a material storage tank. The material level detecting device used in the material storage tank comprises a shell body (1), wherein the shell body (1) is provided with an upper sealing end cover and a lower sealing end cover, one ends of elastic vibration pieces (2) penetrate into the shell body (1) through holes which are evenly formed in one side of the shell body (1), each elastic vibration piece (2) is provided with a strain piece set (4) and a reset spring (3), the other ends of the elastic vibration pieces (2) stretch out of the wall of the shell body (1) in a suspending mode, the elastic vibration pieces (2) are connected with the shell body (1) through pin shafts, a rotary shaft (6) is vertically installed on the side, corresponding to the elastic vibration pieces (2), in the shell body (1), the upper end of the rotary shaft (6) stretches out of the upper end cover of shell body (1) to be connected with a motor (7), ball head rotary arms (5) which are perpendicular to the axis of the rotary shaft (6) and are used for knocking the elastic vibration pieces (2) are fixedly connected to the middle of the rotary shaft (6) in the axial direction, and the ball head rotary arms (5) correspond to the elastic vibration pieces (2) are at the same heights with the elastic vibration pieces (2) respectively. According to the material level detecting device used in the material storage tank, a mechanical vibration structure and an elastic vibration piece stress-strain signal detection method are adopted, the structure is simple, the antijamming capability is strong, the service life is long, the accuracy is high, and the cost is low.
Description
Technical field
The utility model relates to a kind of material-level detecting device for storage tank, relates to specifically a kind of detecting device of measuring powder material level in storage tank, and this device adopts the vibrating reed vibration deformation to cause that strain-gauge group output signal judges powder material level.
Background technology
Storage tank is job facilities important in a lot of industries, as the cement in the flour storage tank in food processing enterprises, concrete mixing plant in construction trade and yellow ground storage tank etc.Storage tank requires and can continuously work, and neither can also can not affect manufacturing schedule because charging causes to slow down slowly because of the too fast too much wharf explosion of charging, and this just requires in feeder process and can carry out Real-Time Monitoring to the material level of the material of batch can.
At present, for the monitoring material position of powder batch can, mainly contain radar level gauge, ultrasonic material level detection unit, microwave level-sensing device etc. contactless, and weight hammer type, electric motor type level-sensing device etc.The principle of work of Non-contact type level gage is by emitting electromagnetic wave, super sonic or microwave pulse, encounter the measured medium surface, its part is reflected back, thereby obtain the material level value, but in powder storing tank working process, be generally high dust working environment, ultrasonic material level detection unit can't penetrate heavy dust, radar level gauge, easily at exit skirt knot ash, impact is measured, and electromagnetic wave propagation very high speed, transmitter pulse and the time gap very little (nanosecond order) of accepting pulse are difficult to confirm that error is large; Plumb-bob Material Level Meter and mechanical level meter are because electrical equipment is worked under high load capacity for a long time, and be fragile, and it is a lot of to affect the factor of output electrical signals power, and the result of acquisition is inaccurate.
Chinese utility model patent 94219234.6 discloses a kind of utilization and has led the shell transmitting vibrations of shaking, and judges that by the delay time vibration shape of vibration of judgement solid accumulation arrives the detecting device of height.But due to: (1) needs a plurality of motors, and among motor is sealed in, is not easy to maintenance, changes; (2) rigidity that is connected with response body of the mass of vibration in assembly is large, and during vibration, the relative acceleration of mass and response body is less, a little less than causing signal that response body exports, is unfavorable for signal measurement and differentiation; (3) vibration is more violent usually when work for batch can, will make the vibration assembly continue to do forced vibration when being buried by material, disturbs its time-delay vibration, the accuracy that impact is measured.
Summary of the invention
The purpose of this utility model is in order to overcome problems of the prior art and deficiency, provide a kind of simple in structure, antijamming capability strong, powder level detection device in long working life, highly versatile and storage tank with low cost.
for achieving the above object, solve the problems of the technologies described above, technical solution adopted in the utility model is, a kind of powder level detection device, comprise the housing 1 that is provided with the upper-lower seal end cap, one sidewall of described housing 1 offers several uniform holes for elastic vibrating moving plate 2 is installed from bottom to top, the end that described elastic vibrating moving plate 2 is provided with strain-gauge group 4 and retracing spring 3 penetrates in housing 1 by the hole of offering, the other end overhangs outside housing 1 wall, the middle bearing pin that adopts is connected with housing 1, a side of corresponding described elastic vibrating moving plate 2 vertically is mounted with rotating shaft 6 in described housing 1, the lower end of described rotating shaft 6 is arranged on the supporting plate 8 that is provided with, the upper end is stretched out housing 1 upper end cover and is connected with motor 7, middle-end corresponding described elastic vibrating moving plate 2 equal-height positions vertically is fixedly connected with respectively the bulb pivoted arm 5 that be used for impact elastic vibrating moving plate 2 perpendicular with rotating shaft 6 axis.
Also offer respectively the window with cover that is used for installation and maintenance of some corresponding elastic vibrating moving plates 2 on described housing 1 sidewall corresponding with elastic vibrating moving plate 2 is installed.
Described elastic vibrating moving plate 2 and described housing 1 also are provided with the elastic seal lasso between installing.
The upper and lower side of described rotating shaft 6 also is provided with bearing.
Described motor 7 is low frequency electric machine.
Described retracing spring 3 is for drawing spring.
The utility model is owing to adopting the mechanical vibration structure, the mode of elastic vibrating moving plate ess-strain signal detection, and device performance is reliable, and accuracy of detection is high, has avoided the large problem of knot dirt, reflection error of contactless material-level detecting device commonly used; Due to the mode that adopts distortional stress to measure, avoid the machine work load of traditional contact material-level detecting device large again, held damageable problem; Simultaneously, the utility model only needs a motor-driven, and functional reliability is high, convenient maintenance, change, and the elastic vibrating moving plate flows or blow over and cover completely distortion and the self-vibration mutually noninterfere of tank body own, and applied widely, survey precision is high.
Description of drawings
Fig. 1 is organigram of the present utility model;
Fig. 2 is the A-A line profile of Fig. 1;
Fig. 3 is the structure cutaway view that the utility model is used in the powder storing tank.
The specific embodiment
The utility model is described in further detail below in conjunction with drawings and embodiments.Figure 1 shows that the material-level detecting device organigram for storage tank, this device consists of the following components: the housing 1 that is provided with the upper-lower seal end cap, one sidewall of described housing 1 offers several uniform holes for elastic vibrating moving plate 2 is installed from bottom to top, the end that described elastic vibrating moving plate 2 is provided with strain-gauge group 4 and retracing spring 3 penetrates in housing 1 by the hole of offering, the other end overhangs outside housing 1 wall, the middle bearing pin that adopts is connected with housing 1, a side of corresponding described elastic vibrating moving plate 2 vertically is mounted with rotating shaft 6 in described housing 1, the lower end of described rotating shaft 6 is arranged on the supporting plate 8 that is provided with, the upper end is stretched out housing 1 upper end cover and is connected with motor 7, middle-end corresponding described elastic vibrating moving plate 2 equal-height positions vertically is fixedly connected with respectively the bulb pivoted arm 5 that be used for impact elastic vibrating moving plate 2 perpendicular with rotating shaft 6 axis.Also offer respectively the window with cover that is used for installation and maintenance of some corresponding elastic vibrating moving plates 2 on described housing 1 sidewall corresponding with elastic vibrating moving plate 2 is installed.Described elastic vibrating moving plate 2 and described housing 1 also are provided with the elastic seal lasso between installing.The upper and lower side of described rotating shaft 6 also is provided with bearing.Described motor 7 is low frequency electric machine.Described retracing spring 3 is for drawing spring.
Fig. 2 is A-A line profile shown in Figure 1, elastic vibrating moving plate 2 adopt in the middle bearing pin and crust of the device housing 1 hinged, disposing quantity can decide according to the accuracy requirement of engineering test, as only needing rough early warning powder material level, can be only in the early warning position, an elastic vibrating moving plate 2 be set, arrange when a plurality of, elastic vibrating moving plate 2 should vertically evenly distribute along housing 1; Retracing spring 3 in time resets elastic vibrating moving plate 2, impacts with the periodicity that adapts to bulb pivoted arm 5; Strain-gauge group 4, the dynamic stress of measurement shell fragment judges its deformation.
The working mechanism analysis of the utility model device:
As shown in Figure 1, after the utility model device is installed on the powder material tank inwall, drive 6 cycle of lower rotary shaft low speed rotation at low frequency electric machine 7, the ball head of bulb pivoted arm 5 periodically impacts the elastic vibrating moving plate 2 on corresponding height in rotation process, thereby makes elastic vibrating moving plate 2 produce amount of deflection or corner displacement.Powder in storage tank is solid-state granular, can be constantly under himself action of gravitation in fill process falls to the bottom of storage tank, and upwards piling up gradually.Elastic vibrating moving plate 2 stretches out housing 1 part and is in succession flowed or blow over and cover completely by the material of granular from bottom to top, under the periodicity of the ball head of bulb pivoted arm 5 impacts, the elastic vibrating moving plate 2 of having been flowed or blow over and cover completely by powder will be out of shape the generation amount of deflection, be equivalent to the cantilever beam excited target that left end props up admittedly, produce larger strain, do subsequently damped vibration, then reset under the composite factor of retracing spring etc., thereby generation stress and strain, to after being attached to 4 one driving voltages of one group of strain-gauge group on elastic vibrating moving plate 2 surfaces, this moment, the electric signal of output had larger value; Not yet buried elastic vibrating moving plate 2 can produce corner displacement, namely freely rotate around the middle part hinge-point, be equivalent to a pivoted arm excited target that the middle part is hinged, produce corner displacement, but it is very little to produce strain, at this moment, and after giving 4 one driving voltages of strain-gauge group on the surface that is attached to elastic vibrating moving plate 2, the value of electrical signals of output is very little, and elastic vibrating moving plate 2 does not produce internal stress at this moment.As can be known from the above analysis, in both cases, the boundary condition of having nothing in common with each other, take solid accumulation height highest point as the boundary, the electric signal of strain-gauge group 4 outputs of pasting on the elastic vibrating moving plate 2 at this device differing heights place has strong and weak two kinds, strong and weak according to the signal of output different, namely can know the height that solid accumulation has reached.
As shown in Figure 3, the structure cutaway view of using in the powder storing tank for material-level detecting device of the present utility model, under the slack tank situation, device of the present utility model vertically is arranged on the storage tank inwall, gradually by upwards constantly piling up at the bottom of tank, elastic vibrating moving plate 2 stretches out the material that housing 1 outer part piled up from bottom to top and buries along with material in storage tank.After the elastic vibrating moving plate 2 of various boundary is impacted, the strain electromotive signal of output is different, compare analysis by the signal of observing and record, as will height zero point be made as the height of elastic oscillation shell fragment 2 present positions of below of device of the present utility model, the elastic vibrating moving plate 2 of the below of device is denoted as n
1, upwards be denoted as successively n
1, n
2, n
3,, n
NAccording to the characteristics of signal, if critical take K signal as material level, the signal characteristic that the elastic vibrating moving plate 2 of the elastic vibrating moving plate on its top 2 and its below is exported is obviously different, the height h that can judge level of filler material as:
h=Δl*K
In formula, Δ l is that elastic vibrating moving plate 2 is along the distribute spacing value of the utility model device case 1.
Claims (6)
1. material-level detecting device that is used for storage tank, comprise the housing (1) that is provided with the upper-lower seal end cap, it is characterized in that offering on a sidewall of described housing (1) several uniform holes for elastic vibrating moving plate (2) is installed from bottom to top, the end that described elastic vibrating moving plate (2) is provided with strain-gauge group (4) and retracing spring (3) penetrates in housing (1) by the hole of offering, the other end overhangs outside housing (1) wall, the middle bearing pin that adopts is connected with housing (1), a side of corresponding described elastic vibrating moving plate (2) vertically is mounted with rotating shaft (6) in described housing (1), the lower end of described rotating shaft (6) is arranged on the supporting plate (8) that is provided with, the upper end is stretched out housing (1) upper end cover and is connected with motor (7), middle-end corresponding described elastic vibrating moving plate (2) equal-height position vertically is fixedly connected with respectively the bulb pivoted arm (5) that be used for impact elastic vibrating moving plate (2) perpendicular with rotating shaft (6) axis.
2. a kind of material-level detecting device for storage tank according to claim 1, it is characterized in that, also offer respectively the window with cover that is used for installation and maintenance of some corresponding elastic vibrating moving plates (2) on described housing (a 1) sidewall corresponding with elastic vibrating moving plate (2) is installed.
3. a kind of material-level detecting device for storage tank according to claim 1 and 2, is characterized in that, described elastic vibrating moving plate (2) and described housing (1) also are provided with the elastic seal lasso between installing.
4. a kind of material-level detecting device for storage tank according to claim 1, is characterized in that, the upper and lower side of described rotating shaft (6) also is provided with bearing.
5. a kind of material-level detecting device for storage tank according to claim 1, is characterized in that, described motor (7) is low frequency electric machine.
6. a kind of material-level detecting device for storage tank according to claim 1, is characterized in that, described retracing spring (3) is for drawing spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320199656 CN203268752U (en) | 2013-04-19 | 2013-04-19 | Material level detecting device used in material storage tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320199656 CN203268752U (en) | 2013-04-19 | 2013-04-19 | Material level detecting device used in material storage tank |
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| Publication Number | Publication Date |
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| CN203268752U true CN203268752U (en) | 2013-11-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201320199656 Expired - Fee Related CN203268752U (en) | 2013-04-19 | 2013-04-19 | Material level detecting device used in material storage tank |
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| CN (1) | CN203268752U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103592001A (en) * | 2013-11-14 | 2014-02-19 | 北汽福田汽车股份有限公司 | Mixing station powder tank material level detection device and mixing station |
| CN105258762A (en) * | 2015-10-16 | 2016-01-20 | 江苏科技大学 | Cantilever beam type level measurement apparatus and measurement method thereof |
| CN105258762B (en) * | 2015-10-16 | 2018-08-31 | 江苏科技大学 | A kind of beam type apparatus for measuring charge level and measurement method |
-
2013
- 2013-04-19 CN CN 201320199656 patent/CN203268752U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103592001A (en) * | 2013-11-14 | 2014-02-19 | 北汽福田汽车股份有限公司 | Mixing station powder tank material level detection device and mixing station |
| CN105258762A (en) * | 2015-10-16 | 2016-01-20 | 江苏科技大学 | Cantilever beam type level measurement apparatus and measurement method thereof |
| CN105258762B (en) * | 2015-10-16 | 2018-08-31 | 江苏科技大学 | A kind of beam type apparatus for measuring charge level and measurement method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131106 Termination date: 20160419 |
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| CF01 | Termination of patent right due to non-payment of annual fee |