CN102944343A - Overload protection device for tension and pressure sensor - Google Patents
Overload protection device for tension and pressure sensor Download PDFInfo
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- CN102944343A CN102944343A CN2012104461506A CN201210446150A CN102944343A CN 102944343 A CN102944343 A CN 102944343A CN 2012104461506 A CN2012104461506 A CN 2012104461506A CN 201210446150 A CN201210446150 A CN 201210446150A CN 102944343 A CN102944343 A CN 102944343A
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- overload
- pressure sensor
- pull pressure
- gag lever
- tension
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Abstract
The invention discloses an overload protection device for a tension and pressure sensor. Compressed spacing rods are connected with a lower action plate to form a rack; an upper spacing plate and the two compressed spacing rods are in clearance fit; the lower end of the upper spacing plate is provided with the tension and pressure sensor; the lower end of the tension and pressure sensor is provided with a tension support; the upper surface of a middle plate of a lower action plate and the lower end surface of the tension and pressure sensor form elastic connection by an upper overload deformation device; the upper surface of the middle plate of the lower action plate and the upper surface of the tension support form elastic connection by a lower overload deformation device; a stretching overload switch is installed on an upper wiring block fixed by stretching spacing nuts; a compressing overload switch is installed on a lower wiring block fixed by the compered spacing rods; and the stretching overload switch, a stretching overload warning light, the compressing overload switch, a compressing overload warning light and a power supply are connected into a ground line. The overload protection device for the tension and pressure sensor has the advantages of simple structure, good mechanical property and long service life.
Description
Technical field
The present invention relates to a kind of pull pressure sensor overload protection arrangement.
Background technology
What extensively adopt in the mechanical property testing system at present is strain gauge drawing force and compression force transducer.This sensor has simple in structure, the characteristics that cost is low, and the test macro technology maturation, thereby be able to widespread use.Each pull pressure sensor indicates range when dispatching from the factory, in the process of imposed load, if load above the range of pull pressure sensor, can make the pull pressure sensor internal elastomeric produce permanent strain and damage, cause test macro to produce fault.Therefore in use must strictly control the load on the pull pressure sensor, guarantee that load is in pull pressure sensor allows range ability.Yet, in actual use owing to reasons such as design and maloperations, easily make the pull pressure sensor overload, cause its damage.
Summary of the invention
The object of the invention is to; solve above-mentioned existing existing problem; provide a kind of pull pressure sensor that not only can prevent to be subjected to two-way overload load and to damage, can also be when pull pressure sensor be subjected to the overload load, the pull pressure sensor overload protection arrangement of the indication that gives the alarm.
The present invention is achieved in that two compression gag lever posts and lower action plate connect and compose frame, on two compression gag lever posts the stretching stop nut is installed respectively, upper limit plate and two compression gag lever post clearance fit, can move axially along the compression gag lever post, the simultaneously by compression restriction of the gag lever post shaft shoulder and stretching stop nut of shift position, pull pressure sensor is installed in upper limit plate lower end, the pulling force holder is installed in the pull pressure sensor lower end, the intermediate plate upper surface of lower action plate forms elastic coupling by upper overload deformation device and pull pressure sensor lower surface, the intermediate plate upper surface of lower action plate forms elastic coupling by lower overload deformation device and pulling force holder upper surface, the tensile overload switch is installed on the upper wiring board that the stretching stop nut fixed, and the compressive overload switch is installed on the lower terminal block that the compression gag lever post fixes.
Upper overload deformation device is identical with lower overload deformation device structure, and its structure is that piston, dish spring are installed in the shell, and the pretension seat adopts with shell and is threaded.
One end of tensile overload switch is connected with the negative pole of power supply, and the other end of tensile overload switch is connected with tensile overload warning light one end, and the tensile overload warning light other end is connected with the positive pole of power supply; Connect the compressive overload switch in parallel and be connected with the negative pole of power supply, the other end of compressive overload switch is connected with compressive overload warning light one end, and the compressive overload warning light other end is connected with the positive pole of power supply.
Advantage of the present invention is, will be made into the overload anamorphoser after the precompressed of dish spring, and this overload anamorphoser bears the effect of pressure, when force value does not reach dish spring precompression, the overload anamorphoser produces miniature deformation, and when force value surpassed dish spring precompression, the overload anamorphoser produced than large deformation.Therefore, the overload anamorphoser is the load sensing device that the pressure of overload is transformed into deformed movement.Adopt two identical overload anamorphosers in the present invention, when pull pressure sensor tension and pressurized, work respectively, when pulling force or pressure load surpass the pull pressure sensor range, the overload anamorphoser produces deformed movement, compression gag lever post or stretching stop nut are spacing with an end of pull pressure sensor, prevent that the load of transshipping is delivered on the pull pressure sensor; Overload switch is connected simultaneously, and the overloading alarming lamp is bright.The overload anamorphoser that adopts the dish spring to make, simple in structure, mechanical characteristic is good, and the life-span is long.
Description of drawings
Fig. 1 is structural representation of the present invention;
Fig. 2 is circuit diagram;
Fig. 3 (a) is the structural representation of monolithic dish spring overload deformation device;
Fig. 3 (b) is the structural representation of the superimposed overload deformation of biplate dish spring device;
Fig. 4 is
Monolithic dish spring family curve.
Embodiment
Describe in detail below in conjunction with accompanying drawing: as shown in the figure, two compression gag lever posts 8 connect and compose frame with lower action plate 12, on two compression gag lever posts 8 stretching stop nut 4 is installed respectively, upper limit plate 3 and two compression gag lever post 8 clearance fit, can move axially along compression gag lever post 8, the simultaneously by compression shaft shoulder of gag lever post 8 and the restriction of stretching stop nut 4 of shift position, pull pressure sensor 7 is installed in upper limit plate 3 lower ends, pulling force holder 11 is installed in pull pressure sensor 7 lower ends, the intermediate plate upper surface of lower action plate 12 forms elastic coupling by upper overload deformation device 9 and pull pressure sensor 7 lower surfaces, the intermediate plate upper surface of lower action plate forms elastic coupling by lower overload deformation device 10 and pulling force holder 11 upper surfaces, tensile overload switch 1 is installed on the upper wiring board 2 of being fixed on the stretching stop nut 4, and compressive overload switch 6 is installed on the lower terminal block 5 of being fixed on the compression gag lever post 8.
Upper overload deformation device 9, lower overload deformation device 10 structures are identical, and its structure is shell 18 interior installation pistons 16, dish spring 17, and pretension seat 18 adopts with shell 19 and is threaded.
One end of tensile overload switch 1 is connected with the negative pole of power supply 15, and the other end of tensile overload switch 1 is connected with tensile overload warning light 13 1 ends, and tensile overload warning light 13 other ends are connected with the positive pole of power supply 15; Connect 6 parallel connections of compressive overload switch and be connected with the negative pole of power supply 15, the other end that connects compressive overload switch 6 is connected with compressive overload warning light 14 1 ends, and compressive overload warning light 14 other ends are connected with the positive pole of power supply 15.
When the application point of the pressure that device is subject on the suspension ring of upper limit plate 3 and lower action plate 12, it is fixing to set action plate 12 this moment, pressure acts on the suspension ring of upper limit plate 3.Upper overload deformation device 9 is identical with lower overload deformation device 10 structures, and its inner dish spring all is subjected to the effect of pretightning force, establishes overload deformation device 9 and lower overload deformation device 10 pretightning forces are F
0When device was stressed, pressure acted on the pull pressure sensor 7 by upper limit plate 3, the pull pressure sensor 7 upper overload deformation device 9 of exerting pressure downwards.When pressure does not surpass F
0The time, upper overload deformation device 9 produces miniature deformation, and the force value that pull pressure sensor 7 is subject to is the pressure that acts on the upper limit plate 3; When pressure surpasses F
0The time, upper overload deformation device 9 occurs than large deformation, and pressure power sensor 7 moves down, and when the distance that pressure power sensor 7 moves down was δ, compression gag lever post 8 withstood upper limit plate 3, and compressive overload switch 6 is switched at this moment, and compressive overload warning light 14 is bright.Continuation increases pressure to device and since pull pressure sensor 7 because of upper limit plate 3 by compression the spacing of gag lever post 8 be protected, pull pressure sensor 7 pressures are constant, the pressure of pull pressure sensor 7 equals the elastic force of overload deformation device 9, is worth to be F
0+ Δ F.Δ F is that upper overload deformation device 9 is at pretightning force F
0The force value that lower generation δ deflection need to increase;
When device was subjected to pulling force, pulling force acted on the pull pressure sensor 7 by upper limit plate 3, and pull pressure sensor 7 is upwards exerted pressure from the lower end to lower overload deformation device 10 by fixing the pulling force holder 11 of its lower end.When pulling force does not surpass F
0The time, lower overload deformation device 10 produces miniature deformation, and the value of thrust that pull pressure sensor 7 is subject to is the pulling force that acts on the upper limit plate 3; When pulling force surpasses F
0The time, lower overload deformation device 10 occurs than large deformation, and pull pressure sensor 7 moves up, and when the distance that pull pressure sensor 7 moves up was δ, stretching stop nut 4 withstood upper limit plate 3, and tensile overload switch 1 is switched at this moment, and tensile overload warning light 13 is bright.Continuation increases pulling force to device, because pull pressure sensor 7 is protected because of upper limit plate 3 the spacing of Tensile stop nut 4, the suffered pulling force of pull pressure sensor 7 is constant, and pull pressure sensor 7 pressures equal the elastic force of lower overload deformation device 10, are worth to be F
0+ Δ F.Δ F is for making the lower overload deformation device 10 stressed pretightning force F of surpassing
0The pressure increment of rear generation δ deflection;
Pressure 〉=the F that is subject to when device
0During+Δ F, overload protection arrangement work, the overload-alarm lamp is bright.When Δ F was very little, the overload protection arrangement working point was considered as pretightning force F
0
The selecting and arranging with reference to monolithic dish spring family curve of dish spring 17.
The pull pressure sensor range is less, adopts Fig. 3 (a) monolithic dish spring overload deformation device; When the pull pressure sensor range is larger, and require δ hour, adopt the superimposed overload deformation of Fig. 3 (b) biplate dish spring device.
The overload anamorphoser of selecting this type of dish spring to make has good nonlinear characteristic, and near the peak point of dish spring before pressing, very little pressure increment can produce larger distortion.
Monolithic dish spring pretightning force F
0' the peak force F of set-point curve ascent stage before pressing
Max' near, work before not flattening when monolithic dish spring surpasses pretightning force, namely the maximum functional deformation quantity is f
0, because more straight in this working range inner curve variation, namely surpassing pretightning force F
0Effect under, when namely increasing very little power Δ F ', monolithic dish spring just can produce larger deflection f again
0
Peak force F before monolithic dish spring flattens
Max' be slightly less than the 1/n of power sensor 7 ranges, then monolithic dish spring pretightning force F
0' be the pretightning force F of upper overload deformation device 9
01/n, n is overload deformation device dish spring superimposed quantity.When n=1, upper overload deformation device 9 adopts single dish spring, and shown in Fig. 3 (a), during n=2, upper overload deformation device 9 adopts 2 dish springs superimposed shown in Fig. 3 (b).
δ among Fig. 1 chooses.At Fig. 3 (a) with (b), the dish spring adopts superimposed mode, and after the device overload, the maximum functional deformation quantity of the dish spring in the overload deformation device is f
0, i.e. δ＜f
0
Claims (2)
1. pull pressure sensor overload protection arrangement, it is characterized in that, two compression gag lever posts and lower action plate connect and compose frame, on two compression gag lever posts the stretching stop nut is installed respectively, upper limit plate and two compression gag lever post clearance fit, can move axially along the compression gag lever post, the simultaneously by compression restriction of the gag lever post shaft shoulder and stretching stop nut of shift position, pull pressure sensor is installed in upper limit plate lower end, the pulling force holder is installed in the pull pressure sensor lower end, the intermediate plate upper surface of lower action plate forms elastic coupling by upper overload deformation device and pull pressure sensor lower surface, the intermediate plate upper surface of lower action plate forms elastic coupling by lower overload deformation device and pulling force holder upper surface, the tensile overload switch is installed on the upper wiring board that the stretching stop nut fixed, and the compressive overload switch is installed on the lower terminal block that the compression gag lever post fixes;
Upper overload deformation device is identical with lower overload deformation device structure, and its structure is that piston, dish spring are installed in the shell, and the pretension seat adopts with shell and is threaded;
One end of tensile overload switch is connected with the negative pole of power supply, and the other end of tensile overload switch is connected with tensile overload warning light one end, and the tensile overload warning light other end is connected with the positive pole of power supply; Connect the compressive overload switch in parallel and be connected with the negative pole of power supply, the other end of compressive overload switch is connected with compressive overload warning light one end, and the compressive overload warning light other end is connected with the positive pole of power supply.
2. said a kind of pull pressure sensor overload protection arrangement according to claim 1 is characterized in that, the dish spring adopts
The dish spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210446150.6A CN102944343B (en) | 2012-11-09 | 2012-11-09 | Overload protection device for tension and pressure sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210446150.6A CN102944343B (en) | 2012-11-09 | 2012-11-09 | Overload protection device for tension and pressure sensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102944343A true CN102944343A (en) | 2013-02-27 |
| CN102944343B CN102944343B (en) | 2014-07-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210446150.6A Expired - Fee Related CN102944343B (en) | 2012-11-09 | 2012-11-09 | Overload protection device for tension and pressure sensor |
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| CN (1) | CN102944343B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103335759A (en) * | 2013-06-06 | 2013-10-02 | 南京航空航天大学 | Pressure sensor overload protection device |
| CN105890973A (en) * | 2016-04-01 | 2016-08-24 | 烟台正海合泰科技股份有限公司 | Elastic protection device on tension test machine |
| CN109387322A (en) * | 2017-08-08 | 2019-02-26 | 罗伯特·博世有限公司 | Pressure sensor and method for manufacturing pressure sensor |
| CN112998006A (en) * | 2021-03-06 | 2021-06-22 | 朱涛 | Animal prevention clamp for protecting animals by using push rod |
| CN116839768A (en) * | 2023-06-30 | 2023-10-03 | 济南大学 | Miniature piezoresistive stress sensor based on tungsten diselenide |
| CN116989876A (en) * | 2023-07-27 | 2023-11-03 | 中山精量衡器制造有限公司 | Weighing device with overload protection function |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2205000Y (en) * | 1994-06-16 | 1995-08-09 | 杨森平 | Weighing sensor with overload protector |
| CN1212050A (en) * | 1996-03-05 | 1999-03-24 | 西门子公司 | Safety device for mechanical motor driven systems operating with rods and/or cables |
| JPH1194657A (en) * | 1997-09-22 | 1999-04-09 | Nishikawa Seisakusho:Kk | Overload alarming device |
| US20010035122A1 (en) * | 2000-04-04 | 2001-11-01 | Wayne Margetts | Tension overload indicator |
| CN202141504U (en) * | 2011-05-18 | 2012-02-08 | 永正传感(杭州)有限公司 | Pull-press type force cell sensor |
-
2012
- 2012-11-09 CN CN201210446150.6A patent/CN102944343B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2205000Y (en) * | 1994-06-16 | 1995-08-09 | 杨森平 | Weighing sensor with overload protector |
| CN1212050A (en) * | 1996-03-05 | 1999-03-24 | 西门子公司 | Safety device for mechanical motor driven systems operating with rods and/or cables |
| JPH1194657A (en) * | 1997-09-22 | 1999-04-09 | Nishikawa Seisakusho:Kk | Overload alarming device |
| US20010035122A1 (en) * | 2000-04-04 | 2001-11-01 | Wayne Margetts | Tension overload indicator |
| CN202141504U (en) * | 2011-05-18 | 2012-02-08 | 永正传感(杭州)有限公司 | Pull-press type force cell sensor |
Non-Patent Citations (1)
| Title |
|---|
| 夏仁华: "传感器的过载保护", 《衡器》 * |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103335759A (en) * | 2013-06-06 | 2013-10-02 | 南京航空航天大学 | Pressure sensor overload protection device |
| CN105890973A (en) * | 2016-04-01 | 2016-08-24 | 烟台正海合泰科技股份有限公司 | Elastic protection device on tension test machine |
| CN109387322A (en) * | 2017-08-08 | 2019-02-26 | 罗伯特·博世有限公司 | Pressure sensor and method for manufacturing pressure sensor |
| CN112998006A (en) * | 2021-03-06 | 2021-06-22 | 朱涛 | Animal prevention clamp for protecting animals by using push rod |
| CN112998006B (en) * | 2021-03-06 | 2023-08-04 | 南京林中发智能科技有限公司 | Animal-proof clamp for protecting animals by pushing rod |
| CN116839768A (en) * | 2023-06-30 | 2023-10-03 | 济南大学 | Miniature piezoresistive stress sensor based on tungsten diselenide |
| CN116839768B (en) * | 2023-06-30 | 2024-02-20 | 济南大学 | Miniature piezoresistive stress sensor based on tungsten diselenide |
| CN116989876A (en) * | 2023-07-27 | 2023-11-03 | 中山精量衡器制造有限公司 | Weighing device with overload protection function |
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| Publication number | Publication date |
|---|---|
| CN102944343B (en) | 2014-07-30 |
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