CN2528009Y

CN2528009Y - Grain Powder moisture content fast testing sensor

Info

Publication number: CN2528009Y
Application number: CN 02213436
Authority: CN
Inventors: 窦祥增
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-03-22
Filing date: 2002-03-22
Publication date: 2002-12-25
Anticipated expiration: 2012-03-22

Abstract

The utility model discloses a rapid test sensor for foodstuff moisture, which is provided with an upper cover (1) and a base 2, the utility model is characterized in that the inner bottom of the base 2 is provided with electrode contact points 10, 11 and 12, wherein an measuring cylinder 3 is arranged in the base 2, the bottom of the measuring cylinder 3 and a spring 9 are assembled together, the inner wall of the measuring cylinder 3 adjacent to the lower part is provided with a protrusion platform, an electrode plate 8 with a lower electrode 7 is arranged below the protrusion platform, the lower electrode plate is matched fixedly with an upper electrode plate 4 with an upper electrode 6. The utility model has the advantages of solving the problem about the error of sensor in the foodstuff powder inspection effectively.

Description

The quick testing sensor of a kind of grain powder moisture content

Technical field the utility model belongs to resistance-type grain water tester device, the quick testing sensor of particularly a kind of grain powder moisture content.

Background technology is fairly perfect for the means of testing of grain at present, but test for grain powder such as powders such as wheat flour, corn flour, the main Oven Method that relies on is chemically examined, detecting a moisture content need dry the sample of flour, the time that generally needs several hrs, this can't be used for instructing, controlling production in flour or other grain powder production runes.Therefore on market and in the grain powder manufacturing enterprise, also there is not grain powder moisture content high speed tester device using at present.The sensor that general grain pigment testing tool uses because have when measuring powder that the grain powder density is inconsistent, test pressure can not be constant etc. problem, have problems such as the too big and dispersion of measuring error, and can't test fast.In order to solve the grain powder pigment problem of test fast, designer of the present utility model has carried out a large amount of investigation, propose the quick testing sensor of grain powder moisture content of the present utility model, fundamentally solved the excessive problem of the quick test errors of grain powder.

The quick testing sensor of this grain powder moisture content of summary of the invention, this sensor has one to be made by insulating material, the loam cake (1) and the base (2) that can link together by matching thread, it is characterized in that having electrode contact (10) in the bottom of base (2), (11), (12), go up flexible switch plate (13) at electrode contact (10), the elastic switch slice (14) that extends to above the electrode contact (11) is arranged on electrode contact (12), tube (3) is surveyed in one of assembling in base (2), and this survey tube (3) and loam cake (1) and base (2) are for being slidingly matched.Bottom and the spring (9) of surveying tube (3) are assembled together, near on the inwall of bottom a boss is arranged in the summary of surveying tube (3), one of assembling has the lower electrode plate (8) of bottom electrode (7) on it below this boss, bottom electrode (7) and a lower electrode plate (8) and to survey tin (3) be a conductor.This lower electrode plate by insulcrete (5) with its on have the fixing assembling of electric pole plate (4) of top electrode (6), having at least an electrode to pass insulcrete (5) among the top electrode (6) extends downward under the lower electrode plate (8), this extends the top electrode that gets off and is insulated the same extension downwards of the electrode of the center of bottom electrode (7) and top electrode by insulating mat (17) and lower electrode plate (8).Its significant advantage is to detect the moisture content of grain powder (as the powder after the grain processings such as wheat flour, corn flour, soybean flour) apace.

Appended drawings 1 is the front view of sensor of the present utility model, and accompanying drawing 2 is A-A section diagrammatic sketch of accompanying drawing 1, and accompanying drawing 3 is electrical principle sketches.Sequence number in the accompanying drawing is expressed as: 1, loam cake, 2, base, 3, survey tube, 4, electric pole plate, 5, insulcrete, 6, top electrode, 7, bottom electrode, 8, lower electrode plate, 9, spring, 10,11,12, electrode contact, 13,14, elastic switch slice, 15, pilot hole under the spring, 16, pilot hole on the spring, 17, insulating mat.

Embodiment has provided a specific embodiment of the quick testing sensor of this grain powder moisture content with reference to accompanying drawing in the accompanying drawing.It has the loam cake (1) and the base (2) that can be linked together by matching thread, and loam cake and base are insulating material and make, (as ABS resin).Inner bottom part at base (2) has electrode contact (10), (11) and (12), go up flexible switch plate (13) at electrode contact (10), the elastic switch slice (14) that extends to above the electrode contact (11) is arranged on electrode contact (12), tube (3) is surveyed in one of assembling in base (2), the bottom and the spring (9) of this survey tube (3) are assembled together, and survey tube and are slidingly matched with base inner wall.Near on the inwall of bottom a boss is arranged in the summary of surveying tube (3), one of assembling has the lower electrode plate (8) of bottom electrode (7) on it below this boss, this lower electrode plate by insulcrete (5) with its on have the fixing assembling of electric pole plate (4) of top electrode (6), upper and lower battery lead plate mutual insulating.Insulcrete is preferably predicted the sidewall transition fit of tube, and like this, upper and lower battery lead plate and insulcrete have constituted the bottom of surveying tube, makes flour can not spill owing to a variety of causes from the bottom of surveying tube.Have at least an electrode to extend downward under the lower electrode plate (8) among the top electrode (6) by insulcrete (5) and lower electrode plate (8), this extends the top electrode (4) that gets off and is insulated the same extension downwards of the electrode of the center of bottom electrode (7) and top electrode by insulating mat (17) and lower electrode plate (8).

Have in the summary bottom of side neck (3) assembling lower electrode plate (8) that pilot hole (16) cooperates the location with the horizontal expansion end of spring (9) on the spring.

Have in the bottom of base (2) that pilot hole (15) cooperates the location with the following elongated end of spring (9) under the spring.There have been these two pilot holes further to limit to survey the annexation between tube and the spring, made that to survey tube reliable more and have a polarization when mobile in base.

Top electrode (6) that extends and electrode contact (10) corresponding matching are with the electrode (7) and contact (11) corresponding matching of center in the same bottom electrode that extends downwards of top electrode.

The quantity of top electrode and bottom electrode, The more the better from the angle of use and degree of accuracy, but owing to be subjected to sensor space and the manual physical condition restriction of operator, can not be too intensive.But the best symmetric offset spread of top electrode and bottom electrode is arranged, makes powder be able to even distribution therein, improves accuracy of test.

In addition, under the prerequisite that technical conditions allow, loam cake and base can be equipped with automatic equipment,, make measuring process realize robotization as by frequency conversion or stepper motor and suitable automation equipment or industrial pc.

If consider, top electrode (6) and switch plate (13) and contact (10) direct connection like this, as long as power supply is connected with electrode (12) by bottom electrode (7) and switch plate (14), can be tested moisture content fast from simplicity.

Use summary is: take off loam cake, will survey and fill flour (wheat, corn flour etc. all can) in the tube, with the screw thread of the screw thread aligning base of loam cake, firmly tighten after pressing.This moment, the inwall plane of loam cake at first was compressed to flour, because flour is more open, the pressure of loam cake also deficiency so that spring (9) compression, therefore earlier with loose flour compacting, make its density trend towards unanimity, the flour that is compacted in the survey tube closely contacts with the inwall of all top electrodes and bottom electrode and survey tube.Apply screwing force this moment again, because flour is compacted, the acting force of this moment is with the flour of compacting and survey a tube compression spring downwards together, and when length of spring compressed during to the pressure preset, its length shortens, promptly surveying tube moves down, contact with (14) with switch plate (13) respectively with bottom electrode (7) at the top electrode (6) of surveying tube bottom, continue to tighten loam cake, when bottom electrode (7) contacts with contact 11 with switch plate (14), the power supply of whole instrument is connected, and begins to measure.Its outstanding feature is: by design more cleverly, making and at first to compress flour, recompress spring subsequently, is that electrode contacts closure with contact and opens circuit power at last, begins to measure the moisture content of grain part body.Formed the grain powder and be not compressed to the density basically identical, surveyed tube and can not move, power switch can not be opened, the protective effect that instrument can not be tested.Do not have flour if survey in the tube, loam cake is screwed to the end after, the inner plane of loam cake can not run into upper/lower electrode and survey the upper edge of tube, therefore, sensor can not energized as previously mentioned, you also just can not obtain test result.If survey in the tube more flour is housed, after loam cake is tightened, directly compresses flour survey tube and spring are moved, the sensor energized is carried out the moisture content test as previously mentioned.If the interior flour of survey tube is less, after then loam cake was tightened, loam cake contacted with flour simultaneously with the upper edge of surveying tube, compressed the upper edge of flour and/or survey tube simultaneously, and survey tube and spring are moved, and therefore, the sensor energized is carried out the moisture content test as previously mentioned.

Claims

1, the quick testing sensor of a kind of grain powder moisture content, this sensor has the loam cake (1) and the base (2) that can be linked together by matching thread, it is characterized in that having electrode contact (10) at the inner bottom part of base (2), (11), (12), go up flexible switch plate (13) at electrode contact (10), the elastic switch slice (14) that extends to above the electrode contact (11) is arranged on electrode contact (12), tube (3) is surveyed in one of assembling in base (2), the bottom and the spring (9) of this survey tube (3) are assembled together, near on the inwall of bottom a boss is arranged in the summary of surveying tube (3), one of assembling has the lower electrode plate (8) of bottom electrode (7) on it below this boss, this lower electrode plate by insulcrete (5) with its on have the fixing assembling of electric pole plate (4) of top electrode (6), have at least an electrode to extend downward under the lower electrode plate (8) among the top electrode (6) by insulcrete (5), this extends the top electrode that gets off and is insulated the same extension downwards of the electrode of the center of bottom electrode (7) and top electrode by insulating mat (17) and lower electrode plate (8).

2, according to the quick testing sensor of the described grain powder of claim 1 moisture content, the summary bottom that it is characterized in that said side neck (3) assembling lower electrode plate (8) has that pilot hole (16) cooperates the location with the horizontal expansion end of spring (9) on the spring.

3, according to the quick testing sensor of the described grain powder of claim 1 moisture content, the bottom that it is characterized in that said base (2) has that pilot hole (15) cooperates the location with the following elongated end of spring (9) under the spring.

4, according to the quick testing sensor of the described grain powder of claim 1 moisture content, top electrode (6) that it is characterized in that said extension and electrode contact (10) corresponding matching, the center in the bottom electrode with same electrode (7) that extends downwards of top electrode and electrode contact (11) corresponding matching.