CN204964324U - Microwave buoyancy method spot test device - Google Patents

Abstract

The utility model discloses a microwave buoyancy method spot test device, include: the specimen cup container, its glass of body evenly distributed aperture, the electronic scale, it includes the rigidity fine rule that is used for measuring weight, the rigidity fine rule hangs the specimen cup container, the water tank, it is upper end open -ended container, sets up in specimen cup container below, the elevating platform, it sets up in the water tank below, and the drive water tank goes up and down, wherein, when the elevating platform rose to the highest point, the drive water tank can be with test data in the complete water intrusion of specimen cup container, when the elevating platform dropped to lower, the drive water tank dropped to and to make the specimen cup container break away from the water tank totally. The utility model has the characteristics of automatic competent, convenient, quick, accurate, environmental protection, sample need not prior crushing can test etc.

Description

A rapid measuring device for microwave buoyancy method

technical field

The utility model relates to the field of grain moisture measurement, in particular to a microwave buoyancy method rapid measurement device.

Background technique

Moisture content is an important restrictive item in grain quality standards, which has an important impact on grain processing, storage, transportation and sales. It is of great significance to determine a fast, accurate and convenient method for grain moisture determination. Although there are many methods for measuring grain moisture, there are many deficiencies, for example: my country's national standard method (drying method), although the detection accuracy is very high, it is time-consuming, energy-consuming, and inefficient, and cannot achieve fast online detection; Although the method has the advantages of simple structure, low cost, and fast detection speed, it has low measurement accuracy and is susceptible to interference; the resistance method is not suitable for the determination of high-moisture and large-grain grains; although the infrared heating method is fast in measurement, it is easy to cause dry matter loss. , low precision, although the near-infrared method is fast, but the variety, size, density, ambient temperature, vibration, etc. of the sample will affect the measurement results, the stability is poor, and the applicable area is small; other methods such as microwave and radio method, nuclear magnetic resonance method , neutron method, acoustic method, etc., are all unable to be widely used due to many factors such as high cost and high condition requirements. In the field of grain moisture content measurement, our country is still relatively weak in terms of testing methods and basic theoretical research compared with other countries with relatively developed science and technology.

The patent number of the "rapid determination of grain moisture by buoyancy method and its measuring instrument" was first applied for: CN200810050625.3, which discloses the rapid detection of grain moisture by using the buoyancy method. Data accuracy and other purposes, but due to the need for sample crushing, water injection and pressure during the measurement process, the operation is inconvenient, and at the same time, the measurement process is unstable, the automation level is low, and manual operations are more cumbersome, and, in the background file , the device is relatively large in size, and there are inconvenient problems in moving and transporting.

Utility model content

The utility model designs and develops a microwave buoyancy method rapid measuring device, the purpose of which is to provide a test device with small fluctuation of test data and accurate and stable test results according to the principle of "Archimedes' buoyancy law".

Another purpose of the utility model is to enable the weighing test to be integrated in the same device, and the design of the device is compact, easy to move, and highly automated.

At the same time, the utility model also has another utility model purpose, which is to fully wet the sample through the action of microwaves before the test, which increases the flexibility, stability and accuracy of the buoyancy test of the sample in water. At the same time, microwave operation Simple, flexible and convenient, the goal can be achieved without manual cumbersome operations.

The technical scheme provided by the utility model is:

A microwave buoyancy method rapid determination device, comprising:

The sample cup container has small holes evenly distributed on the cup body; the sample cup container is made of stainless steel;

an electronic scale comprising a rigid thin wire for measuring weight, the rigid thin wire suspending the sample cup container;

A water tank, which is a container with an open upper end, is arranged below the sample cup container;

Lifting platform, which is arranged under the water tank and drives the water tank to go up and down;

Wherein, when the lifting table rises to the highest point, driving the water tank can completely immerse the sample cup container in water to test data; The sample cup container was completely disengaged from the water tank.

Preferably, it also includes:

The bracket includes an electronic scale tray, an arc-shaped support frame and a base; wherein, the electronic scale tray is used to place the electronic scale, and its center is provided with a hole structure, and the base is used to place the electric lifting platform , the upper end of the arc-shaped support frame is connected to the rear edge of the electronic scale tray, and the lower end is connected to the front edge of the base. The upper part of the arc-shaped support frame is a hollow structure, which can be used to drive the lifting platform to the water tank Pass through the hollow structure when lifting; the electronic scale tray, the arc-shaped support frame and the base are welded into one.

Preferably, it also includes: an outer shell, which is welded and fixed on the base, and passes through the arc-shaped support frame, and the lifting platform is placed inside the outer shell.

Preferably, a water tank stabilizing device is provided between the water tank and the lifting platform, which is used to stabilize the water tank during the lifting process of the water tank.

Preferably, the lifting platform further includes an upper limiter and a lower limiter for limiting the lifting height.

Preferably, the rigid thin wire is tied with a hook, and the hook can pass through the opening structure of the electronic scale tray for hanging the sample cup container.

Preferably, a vertical partition plate is provided through the interior of the water tank, the upper edge of which is flush with the upper edge of the water tank, and the partition plate and the side wall of the water tank divide 1/4 of the volume of the water tank, so An overflow hole is provided at the distance from the upper edge of the dividing plate.

Preferably, the sample cup container includes a cup body, a cup cover and a handle; small holes are evenly distributed on the cup body, the cup cover and the bottom of the cup, the cup cover is detachably connected to the cup body, the A handle is provided on the upper end of the side of the cup cover, and a groove is provided in the middle of the handle, which is used to cooperate with the hook to hang the sample cup container.

Beneficial effects described in the utility model:

1. Through the test device provided by the utility model, it overcomes the shortcomings of the traditional "drying method" such as long operation time, untimely guidance and large error of other rapid moisture analyzers, and can conveniently, quickly, accurately and environmentally friendly test the moisture in the sample. The water content is tested, and the sample does not need to be pulverized, water injection and pressure and other cumbersome operations. At the same time, the electric lifting platform is used to increase the stability of the buoyancy measurement and the automation level of the measurement process;

2. After the sample is weighed and before the test in water, perform microwave operation to make the sample fully wet and then put the sample into the sample cup so that it can enter the water more smoothly and make the measurement more stable and accurate;

3. The equipment of this utility model adopts an integrated bracket design, so that the weighing test can be integrated in the same device. The design of the device is compact, easy to move, high in automation, and convenient to move and transport. The shell is welded on the integrated bracket In addition, the lifting platform and water tank are installed inside the shell and pass through the design of the main body of the bracket, so that the test results are less affected by the external environment and the test is stable.

Description of drawings

Fig. 1 is the cross-sectional view of the microwave buoyancy method grain moisture fast measuring device described in the utility model;

Fig. 2 is the front view of the microwave buoyancy method grain moisture fast measuring device described in the utility model;

Fig. 3 is the left view of the microwave buoyancy method grain moisture fast measuring device described in the utility model;

Fig. 4 is the top view of the microwave buoyancy method grain moisture fast measuring device described in the utility model;

Fig. 5 is a three-dimensional view of the microwave buoyancy method grain moisture fast measuring device described in the utility model;

Fig. 6 is the sample cup described in the utility model;

Fig. 7 is the water tank described in the utility model;

Fig. 8 is a three-dimensional view of the bracket described in the utility model;

detailed description

The utility model will be described in further detail below in conjunction with the accompanying drawings, so that those skilled in the art can implement it by referring to the description.

As shown in Figure 1, Figure 5, and Figure 6, the utility model provides a microwave buoyancy method rapid measurement device, the main body of which includes an electronic scale 100, a water tank 200 and an electric lifting platform 300; The "S" type hook 110 hangs the stainless steel sample cup container 500 with small holes evenly distributed. "S" type hook 110; the water tank 200 is a container with an open upper end, which is arranged below the sample cup container 500 and placed on the electric lifting platform 300, when the sample cup container 500 is hung on the " When the S”-shaped hook 110 is on, the electric lifting platform 300 can lift the water tank 200 to the highest point, and immerse the sample cup container 500 in water, so as to measure the tare weight and gross weight of the sample cup container, and then calculate the moisture value of the sample to be tested , when the electric lifting platform 300 descends to the lowest point, the water tank 200 is driven down to a position where the sample cup container 500 can be completely separated from the water tank 200 .

In another embodiment, as shown in Fig. 1, Fig. 5 and Fig. 8, it also includes: a support 400 capable of placing the electronic scale 100, the water tank 200 and the automatic lifting platform 300 as a whole, and the whole is an integrated design, wherein , the bracket 400 includes an electronic scale tray 410, a base 420 and an arc support frame 430, an electronic scale 100 is placed on the electronic scale tray 410, and a hole with a diameter of 10 cm is opened at the center of the electronic scale tray, and the "S" type hook 110 can Pass through this hole to hang the sample cup container 500, place the electric lifting platform 300 on the base 420, the upper end of the arc support frame 430 is welded on the rear edge of the electronic scale tray 410, and the lower end of the arc support frame 430 is welded on the base 420 At the same time, the upper part of the arc-shaped support frame 430 is a hollow structure, and when the electric lifting platform 300 drives the water tank 200 to go up and down, it can pass through the hollow structure; and this method is only a description of a better example, But it is not limited thereto. As a preference, the electronic scale tray 410 and the arc-shaped support frame 430 can also be connected by a screw connection, and the arc-shaped support frame 430 and the base 420 are also connected by a screw connection, so that the electronic scale The scale tray 410, the base 420 and the arc support frame 430 are detachable for easy replacement and cleaning.

In another embodiment, as shown in Fig. 1 and Fig. 5, it also includes: a shell 440 welded and fixed on the base 420, which passes through the arc support frame 430; the water tank 200 and the electric lifting platform 300 are placed in the shell 440 Internally, it reduces external interference to the measurement during measurement, making the measurement more stable and accurate; and, this method is only a description of a better example, but it is not limited thereto. The most preferred case is the housing 440 It can also be detachably fixed on the base 420 by screwing, so that the shell 440 can be easily replaced and disassembled.

In another embodiment, as shown in FIG. 1 , a water tank stabilizing device 450 is also provided between the water tank 200 and the electric lifting platform 300. The water tank stabilizing device 450 is used to make the water tank 200 more stable in the lifting process. ; In the present embodiment, the water tank stabilizing device 450 is a plank with a flat surface, and this mode is only a description of a preferred example, but is not limited thereto. As a preference, the water tank stabilizing device 450 can also be The buffer foam pad makes the water tank 200 more stable during the lifting process, and the water in the water tank 200 reduces shaking.

In another embodiment, as shown in FIG. 1 , the electric lifting platform 300 also includes an upper limiter 310 and a lower limiter 320 for limiting the lifting height, and a limit switch is arranged inside the electric lifting platform 300. The lowest point is controlled by the upper limiter 310 and the lower limiter 320 respectively. Through the limitation of the lifting height of the upper limiter 310 and the lower limiter 320, the height of each lifting of the electric lifting platform 300 and the water tank 200 is fixed, and the test is increased. accuracy.

In another embodiment, as shown in FIG. 7 , a vertical partition plate 441 equal in height to the water tank 200 is penetrated and welded inside the volume 1/4 of the water tank 200 , and its upper edge is flush with the upper edge of the water tank. The partition plate 441 and the side wall of the water tank 200 are divided into 1/4 of the volume of the water tank, and an overflow hole is opened at a distance of 2 cm from the upper edge of the partition plate 441, and the liquid level of the water in the test process is always maintained by opening the overflow hole. Located at the overflow hole to improve the accuracy of the test; in this embodiment, the number of small holes is 1, as a preference, different numbers of small holes can be opened according to the needs of the implementer, so that the height is even That's it.

In another embodiment, as shown in Figure 6, the sample cup container 500 includes a cup body 510, a cup cover 520 and a handle 530; The cover 520 is connected by threads, and the upper end of the side of the cup cover 520 is provided with a lifting beam 530, and a groove is arranged in the middle of the lifting beam 530, and the sample cup container 500 is lifted through the groove and the "S"-shaped hook 110, and the " The S"-shaped hook 110 is at the same position every time it hangs on the handle 530 of the sample cup container 500.

As shown in Figure 1, by using the microwave buoyancy method quick measuring device provided by the utility model to test, comprising the following steps:

Step 1: Sample weighing: Weigh 99.00-99.10 grams of sample with a weighing vessel, and record the sample weight;

Step 2: Microwave treatment: Pour the sample into a clean container, add a certain amount of water, the volume of the water is about twice the volume of the sample, cover the container cover, there are holes in the container cover, which is conducive to the escape of water vapor, and the container Put it in a microwave oven, heat it on high heat for 10 minutes, and take out the sample;

Step 3: Sample cup tare weighing: When the electric lifting platform 300 is raised to the highest point, the electronic scale 100 clears "0"; then the electric lifting platform 300 is lowered to the lowest point, and the sample cup container 500 is hung on the electronic scale 100 Lower the "S" hook 110 of the weighing hook, and then raise the electric lifting platform 300 to the highest point. At this time, the sample cup container 500 is completely immersed in water. After the balance data is stable, record the tare weight data;

Step 4: Gross weight weighing after microwave treatment: take the sample out of the microwave oven, cool it in water for 10 minutes, and then put it into the sample cup container 500; "0"; then lower the electric lifting platform 300 to the lowest point, hang the sample cup container 500 containing the sample on the "S" type hook 110 of the electronic weighing scale hook, and then lift the electric lifting platform 300 to the highest point , at this time, the sample cup container 500 is completely immersed in water, and after the balance data is stable, record the gross weight data;

Step 5: Calculation of results: Calculate the moisture value of the tested sample according to the sample weight, sample cup tare weight, and gross weight; use the principle of "Archimedes buoyancy law" to immerse the sample in water for suspension weighing, and the water weight loss in the sample is At the same time as "0", weigh the weight of dry matter in water, and then convert the percentage of dry matter to derive the moisture content of the grain;

In this embodiment, it is assumed that the weight of water in the sample is W=V×d ₁ , wherein, V is the volume of water in the sample, in mL, and d ₁ is the density of water in the sample, in g/mL, because the sample If it is completely immersed in water and weighed, then the buoyancy of the water in the sample in the water is F=V×d ₂ , where V is the volume of water in the sample, in mL, and d ₁ is the density of water in the water tank, in g/ mL, because the sample cup body has a hole, and the sample cup is operated in the water tank, so the water in the sample and the water in the water tank have reached temperature equilibrium, that is, d ₁ =d ₂ , therefore, WF=Vd ₁ -Vd ₂ = 0, so when the sample is immersed in water and suspended for weighing, the water in the sample will lose weight as "0", and when the water in the sample loses weight in water as "0", what is weighed on the electronic scale 100 is the dry matter in water The weight of the weight can be converted by using the formula to obtain the percentage of dry matter, and finally determine the percentage of moisture; among them, the moisture formula is derived as follows:

W ₀ =W _g +W _s =ρ _g ×V _g +ρ _s ×V _s …………………………(1)

W ₁ =(ρ _g -ρ _s )×V _g ………………………………………………(2)

(1)-(2) get,

W ₀ -W ₁ =ρ _s ×(V _s +V _g )…………………………………………………(3)

From (2),

${\mathrm{<span\; class="notranslate">\; V</span>}}_{\mathrm{<span\; class="notranslate">\; g</span>}}<span\; class="notranslate">\; =</span>\frac{{\mathrm{<span\; class="notranslate">\; W</span>}}_{\mathrm{<span\; class="notranslate">\; 1</span>}}}{{\mathrm{<span\; class="notranslate">\; \&rho;</span>}}_{\mathrm{<span\; class="notranslate">\; g</span>}}<span\; class="notranslate">\; -</span>{\mathrm{<span\; class="notranslate">\; \&rho;</span>}}_{\mathrm{<span\; class="notranslate">\; the\; s</span>}}}\mathrm{<span\; class="notranslate">\; ...</span>}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 4</span>}<span\; class="notranslate">\; )</span>$

Comprehensive (3), (4) get,

${\mathrm{<span\; class="notranslate">\; V</span>}}_{\mathrm{<span\; class="notranslate">\; the\; s</span>}}<span\; class="notranslate">\; =</span>\frac{{\mathrm{<span\; class="notranslate">\; W</span>}}_{\mathrm{<span\; class="notranslate">\; 0</span>}}<span\; class="notranslate">\; -</span>{\mathrm{<span\; class="notranslate">\; W</span>}}_{\mathrm{<span\; class="notranslate">\; 1</span>}}}{{\mathrm{<span\; class="notranslate">\; \&rho;</span>}}_{\mathrm{<span\; class="notranslate">\; the\; s</span>}}}<span\; class="notranslate">\; -</span>\frac{{\mathrm{<span\; class="notranslate">\; W</span>}}_{\mathrm{<span\; class="notranslate">\; 1</span>}}}{{\mathrm{<span\; class="notranslate">\; \&rho;</span>}}_{\mathrm{<span\; class="notranslate">\; g</span>}}<span\; class="notranslate">\; -</span>{\mathrm{<span\; class="notranslate">\; \&rho;</span>}}_{\mathrm{<span\; class="notranslate">\; the\; s</span>}}}\mathrm{<span\; class="notranslate">\; ...</span>}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 5</span>}<span\; class="notranslate">\; )</span>$

$\mathrm{<span\; class="notranslate">\; m</span>}<span\; class="notranslate">\; =</span>\frac{{\mathrm{<span\; class="notranslate">\; \&rho;</span>}}_{\mathrm{<span\; class="notranslate">\; the\; s</span>}}{\mathrm{<span\; class="notranslate">\; V</span>}}_{\mathrm{<span\; class="notranslate">\; the\; s</span>}}}{{\mathrm{<span\; class="notranslate">\; W</span>}}_{\mathrm{<span\; class="notranslate">\; 0</span>}}}<span\; class="notranslate">\; =</span>\frac{{\mathrm{<span\; class="notranslate">\; \&rho;</span>}}_{\mathrm{<span\; class="notranslate">\; the\; s</span>}}}{{\mathrm{<span\; class="notranslate">\; W</span>}}_{\mathrm{<span\; class="notranslate">\; 0</span>}}}<span\; class="notranslate">\; (</span>\frac{{\mathrm{<span\; class="notranslate">\; W</span>}}_{\mathrm{<span\; class="notranslate">\; 0</span>}}<span\; class="notranslate">\; -</span>{\mathrm{<span\; class="notranslate">\; W</span>}}_{\mathrm{<span\; class="notranslate">\; 1</span>}}}{{\mathrm{<span\; class="notranslate">\; \&rho;</span>}}_{\mathrm{<span\; class="notranslate">\; the\; s</span>}}}<span\; class="notranslate">\; -</span>\frac{{\mathrm{<span\; class="notranslate">\; W</span>}}_{\mathrm{<span\; class="notranslate">\; 1</span>}}}{{\mathrm{<span\; class="notranslate">\; \&rho;</span>}}_{\mathrm{<span\; class="notranslate">\; g</span>}}<span\; class="notranslate">\; -</span>{\mathrm{<span\; class="notranslate">\; \&rho;</span>}}_{\mathrm{<span\; class="notranslate">\; the\; s</span>}}}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; -</span>\frac{{\mathrm{<span\; class="notranslate">\; W</span>}}_{\mathrm{<span\; class="notranslate">\; 1</span>}}}{{\mathrm{<span\; class="notranslate">\; W</span>}}_{\mathrm{<span\; class="notranslate">\; 0</span>}}}<span\; class="notranslate">\; \&times;</span>\frac{{\mathrm{<span\; class="notranslate">\; \&rho;</span>}}_{\mathrm{<span\; class="notranslate">\; g</span>}}}{{\mathrm{<span\; class="notranslate">\; \&rho;</span>}}_{\mathrm{<span\; class="notranslate">\; g</span>}}<span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; 1</span>}}\mathrm{<span\; class="notranslate">\; \dots </span>}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 6</span>}<span\; class="notranslate">\; )</span>$

Among them, W ₀ is the weight of the sample, g; W ₁ is the weight of dry matter in water, g; M is the water content of the sample, %; V _s is the volume of water contained in the sample, mL; V _g is the volume of dry matter in the sample, mL; ρ _s Density of water, _g /mL; density of dry matter in ρg sample, g/mL; Set as the conversion factor A, simplify (6) to The moisture content in the sample can be obtained.

Although the embodiment of the present utility model has been disclosed as above, it is not limited to the use listed in the specification and implementation, it can be applied to various fields suitable for the present utility model, and for those familiar with the art, Further modifications can be readily effected, so the invention is not limited to the specific details and examples shown and described herein without departing from the general concept defined by the claims and their equivalents.

Claims (8)

1. A microwave buoyancy method quick determination device, is characterized in that, comprises: The sample cup container has small holes evenly distributed on the cup body; the sample cup container is made of stainless steel; an electronic scale comprising a rigid thin wire for measuring weight, the rigid thin wire suspending the sample cup container; A water tank, which is a container with an open upper end, is arranged below the sample cup container; Lifting platform, which is arranged under the water tank and drives the water tank to go up and down; Wherein, when the lifting table rises to the highest point, driving the water tank can completely immerse the sample cup container in water to test data; The sample cup container was completely disengaged from the water tank. 2. microwave buoyancy method rapid measuring device as claimed in claim 1, is characterized in that, also comprises: The bracket includes an electronic scale tray, an arc-shaped support frame and a base; wherein, the electronic scale tray is used to place the electronic scale, and its center is provided with an opening structure, and the base is used to place the lifting platform, The upper end of the arc-shaped support frame is connected to the rear edge of the electronic scale tray, and the lower end is connected to the front edge of the base. The upper part of the arc-shaped support frame is a hollow structure, which can be used to drive the lifting platform to lift the water tank. When passing through the hollow structure; the electronic scale tray, the arc-shaped support frame and the base are welded into one. 3. The microwave buoyancy method rapid determination device according to claim 2, further comprising: a shell, which is welded and fixed on the base, and passes through the arc-shaped support frame, and the lifting table is placed inside the housing. 4. The microwave buoyancy method rapid determination device according to claim 3, characterized in that, a water tank stabilizing device is set between the water tank and the lifting platform, which is used to stabilize the water tank during the lifting process of the water tank. 5 . The microwave buoyancy rapid measurement device according to claim 4 , wherein the lifting platform further comprises an upper limiter and a lower limiter for limiting the lifting height. 6 . 6. The microwave buoyancy method quick measuring device as claimed in claim 4 or 5, it is characterized in that, said rigid thin wire is tied with a hook, and said hook can pass through the opening structure of said electronic balance tray for hanging all described sample cup container. 7. microwave buoyancy method rapid measuring device as claimed in claim 6, is characterized in that, described water tank interior runs through and is provided with vertical dividing plate, and its upper edge is flush with described water tank upper edge, and described dividing plate and The side wall of the water tank is divided into 1/4 of the volume of the water tank, and an overflow hole is opened at a distance from the upper edge of the partition plate. 8. microwave buoyancy method rapid assay device as claimed in claim 6, is characterized in that, described sample cup container comprises cup body, cup cover and lifting beam; Described cup body, described cup cover and cup bottom evenly distribute small holes , the cup cover is detachably connected to the cup body, the upper end of the side of the cup cover is provided with a handle, and the middle part of the handle is provided with a groove, which is used to cooperate with the hook to hang the sample cup container.