CN205593882U - Measure apparent density's device - Google Patents

Abstract

The utility model is applicable to the technical field of measurement, and provides a device for measuring bulk density, which includes an electronic scale, a measuring cylinder, a fixing part and a funnel; the bottom of the fixing part is fixed on the electronic scale, and the The upper part of the fixed part is fixed on the funnel; the measuring cylinder is placed on the electronic scale and below the funnel, and is used to hold the powder falling from the funnel; the electronic scale is used to weigh the Graduated cylinder and mass of powder. The device for measuring the bulk density combines the funnel and the electronic scale through the fixing part. After the powder falls from the funnel into the measuring cylinder, the mass of the powder can be obtained directly, so that the bulk density of the powder can be quickly obtained, which not only saves time saving and easy to operate.

Description

A device for measuring bulk density

technical field

The utility model belongs to the technical field of measurement, in particular to a device for measuring bulk density.

Background technique

Powder density can be divided into bulk density and tap density because of its different packing methods. The bulk density refers to the bulk density measured after the powder is freely filled in a standard container under specified conditions, that is, the mass per unit volume of the powder when it is loosely packed, and the unit is expressed in g/ ^cm3 . Bulk density is a comprehensive manifestation of various properties of powder, which is very important for the stability of powder metallurgy, mechanical parts production process, and product quality control, and is also the basis for mold design. Tap density refers to the mass per unit volume measured after the powder in the container is tapped under specified conditions, and the unit is expressed in g/ ^cm3 . The tap density has a guiding effect on the design of the mold for powder compaction and the design of the storage tank or bag for storage and transportation, and is a process property of the powder.

There are three common measurement methods for powder bulk density, namely: funnel method, Scott volumetric method and vibrating funnel method.

Funnel method: The powder falls freely from the funnel hole at a certain height to fill the cup.

Scott volumetric method: Put the powder on the screen of the upper combined funnel, flow into the distribution box freely or by external force, alternately pass through the 4 glass plates with an inclination angle of 25 degrees in the distribution box and the square funnel, and finally press through the hole of the funnel. Free fall from a certain height to fill the cup.

Vibrating funnel method: Put the powder into a funnel with a vibrating device and vibrate under certain conditions. With the help of vibration, the powder falls freely from the funnel hole at a certain height to fill the cup.

For powders that flow freely under specified conditions, the funnel method is used, while for powders that are not free flowing, the Scott volumetric or vibrating funnel method is used.

The existing natural accumulation loose packing density meter, its working process is to plug the funnel opening with a plugging rod made of stainless steel material to prevent dust from falling after it is loaded into the funnel, then take a certain amount of powder and fill it into the funnel, and then plug the plugging rod into the funnel. Pull it out so that the dust falls freely from the mouth of the funnel at a certain height to fill the entire measuring cylinder, then use a scraper to scrape off the dust accumulated on the upper part of the measuring cylinder, and measure the mass of dust per unit volume in the measuring cylinder in the loose state, which is the bulk density of the powder .

The disadvantages of using the existing natural bulk bulk density meter to measure the bulk density are: the operation is complicated, and two sets of equipment are required to obtain the bulk density, namely, the bulk bulk density meter and the electronic scale, and the two devices are not easy to carry , the bulk density cannot be obtained quickly. Moreover, it is difficult to take the graduated cylinder out of the bulk bulk density meter, which may cause the loaded powder to fall out of the graduated cylinder, making the bulk density of the powder to be measured smaller, thereby affecting the measurement accuracy.

Utility model content

The technical problem to be solved by the utility model is to provide a device for measuring the bulk density, aiming at solving the problem that the powder bulk density cannot be quickly measured.

The utility model is achieved in this way, a device for measuring bulk density, comprising an electronic scale, a measuring cylinder, a fixing part and a funnel;

The bottom of the fixing part is fixed on the electronic scale, and the upper part of the fixing part is fixed on the funnel;

The measuring cylinder is placed on the electronic scale and below the hopper, and is used to contain the powder falling from the hopper; the electronic scale is used to weigh the quality of the measuring cylinder and the powder.

The device for measuring bulk density, wherein the fixing part includes at least one fixing column, one end of the fixing column is detachably fixed on the electronic scale, and the other end of the fixing column is fixed on the funnel.

The device for measuring bulk density, wherein the device also includes a clamping part for fixing the measuring cylinder, one end of the clamping part is rotatably fixed on the fixing part, and the other end of the clamping part It is clamped on the measuring cylinder.

The device for measuring bulk density, wherein the clamping part includes a semicircular fixing piece and a rotating rod, one end of the rotating rod is horizontally rotatably fixed on the fixing part, and the rotating rod The other end of the rod is fixed on the semicircular fixing part; the semicircular fixing part is clamped on the measuring cylinder.

Compared with the prior art, the utility model has the beneficial effects that: the device for measuring bulk density combines the funnel and the electronic scale through the fixing part, and the powder falls into the measuring cylinder from the funnel, and the powder can be obtained directly. Quality, so that the bulk density of the powder can be quickly obtained, which not only saves time but is also easy to operate.

Description of drawings

Fig. 1 is the structural representation of the device for measuring bulk density that the utility model embodiment provides;

Fig. 2 is a schematic structural view of the clamping part in the device for measuring bulk density in Fig. 1 .

detailed description

In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not intended to limit the utility model.

Please refer to Fig. 1, Fig. 1 is the structural schematic diagram of the device for measuring bulk density provided by the embodiment of the present invention, this structural schematic diagram is only a kind of preferred implementation mode wherein, those of ordinary skill in the art on the basis of Fig. 1 All other slightly modified embodiments obtained under the premise of not paying creative efforts all belong to the scope of protection of the present invention. The device for measuring bulk density includes an electronic scale 11 for measuring mass, a measuring cylinder 12 , a fixing part 14 and a funnel 13 . The bottom of the fixing part 14 is fixed on the electronic scale 11 , and the upper part of the fixing part 14 is fixed on the funnel 13 . The measuring cylinder 12 is placed on the electronic scale 11 and below the funnel 13, and is used for containing the powder falling from the funnel. Electronic balance 11 is used for weighing the quality of measuring cylinder 13 and powder. The setting of the fixing part 14 needs to make the height between the funnel 13 and the measuring cylinder 12 manufactured according to the national standard GB/T16913.3-2008.

The fixing part 14 includes at least one fixing post, one end of the fixing post is detachably fixed on the electronic scale 11 , and the other end of the fixing post is fixed on the funnel 13 . The fixing column is set to be detachably fixed on the electronic scale 11, which not only facilitates the carrying of the device for measuring bulk density, but also facilitates the independent use of the electronic scale 11. When the bulk density does not need to be measured, the fixed column is not fixed at the bottom of the electronic scale 11, and the electronic scale 11 can be used alone as an instrument for weighing mass. When the bulk density needs to be measured, the fixed column is fixed on the bottom of the electronic scale 11. The height of the fixed column is a fixed value, and the design of the fixed value needs to satisfy the height between the funnel 13 and the measuring cylinder 12 in accordance with the national standard GB/T16913.3-2008.

When the fixed part 14 includes a fixed post, one end of the fixed post can be detachably fixed on the base of the electronic scale 11 through parts such as screws, and the other end of the fixed post can be fixed on the funnel 13 by welding. A fixed ring can be placed on the funnel 13, and the other end of the fixed column is fixed on the fixed ring.

When the fixing part 14 includes two fixing columns, the two fixing columns can be arranged on opposite sides of the electronic scale 11, one end of which is detachably fixed on the base of the electronic scale 11, and the other end can be fixed by welding. On opposite sides of funnel 13. Or, the other ends of the two fixing columns are welded and fixed on a fixing ring, and the funnel 13 is placed on the fixing ring. When there are three, four or more fixing columns, the method is similar to the above, and will not be repeated here.

As shown in Figure 1 and Figure 2, the device for measuring bulk density also includes a clamping part 15 for fixing the measuring cylinder 12, one end of the clamping part 15 is rotatably fixed on the fixed part 14, and the clamping part 15 The other end is clamped on the measuring cylinder 12 . One, two or more clamping parts 15 can be provided. The setting of the clamping part 15 is mainly used for fixing the measuring cylinder 12 to prevent the measuring cylinder 12 from shifting when the powder falls from the funnel 13 .

The clamping part 15 includes a semicircular fixing part 152 and a rotating rod 151. One end of the rotating rod 151 is fixed on the fixed column in a horizontally rotatable manner, and the other end of the rotating rod 151 is fixed on the semicircular fixing part 152. . The semicircular fixing part 152 is clamped on the measuring cylinder 12 , and there is a gap between the semicircular fixing part 152 and the measuring cylinder 12 . One end of the rotating rod 151 can be fixed on the fixed column by a bolt, and when the measuring cylinder 12 needs to be taken out, the bolt is loosened, and the rotating rod 151 can be turned to in the horizontal direction. The clamping part 15 can be designed as one, two, three, etc. When the clamping part 15 is set to one, the circular arc of the semicircular fixing part 152 will generally be greater than 1/2 of the circular arc. The semicircular fixing part 152 is designed to be elastically deformable within a small range, so as to facilitate holding the measuring cylinder 12 . When there are two clamping parts 15, the circular arc of the semicircular fixing part 152 is close to 1/2 of the circular arc. Similarly, when there are three clamping parts 15, the semicircular fixing part 152 The arc of is close to one-third of the arc.

The specific measurement process of the device for measuring bulk density is:

S1. Place the measuring cylinder 12 on the electronic scale 11, read out the mass of the measuring cylinder 12, and then reset the reading of the electronic scale to zero.

S2. Use a plugging rod to block the mouth of the funnel. When the funnel 13 is filled with a certain amount of powder, pull out the plugging rod to let the powder fall into the measuring cylinder 12. When the measuring cylinder 12 is filled with powder, use a scraper to level the powder in the measuring cylinder 12, and After wiping off the powder scattered on the electronic scale 11, read the reading of the electronic scale 11, assuming that the reading of the electronic scale 11 at this time is m ₁ .

S3, through the formula The bulk density of the powder is calculated, where v is the volume of the graduated cylinder 12.

The device for measuring the bulk density of the utility model combines the funnel 13 and the electronic scale 11 through the fixing part 14. After the powder is loaded into the measuring cylinder 12, the mass of the powder can be obtained directly, so that the bulk density of the powder can be quickly obtained. . The device requires only one set of instrument settings to measure bulk density, which saves cost, saves time, and is easier to operate.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present utility model shall be included in this utility model. within the scope of protection of utility models.

Claims (4)

1. the device measuring apparent density, it is characterised in that include electronic scale, graduated cylinder, fixed part and Funnel；

The bottom of described fixed part is fixedly arranged on described electronic scale, and the top of described fixed part is fixedly arranged on described leakage On bucket；

Described graduated cylinder is placed on described electronic scale and is positioned at the lower section of described funnel, for containing to fall from funnel Under powder；

Described electronic scale is for weighing the quality of described graduated cylinder and powder.

The device of measurement apparent density the most according to claim 1, it is characterised in that described fixed part Including at least fixing post, one end of described fixing post is removably fixedly arranged on described electronic scale, described The other end of fixing post is fixedly arranged on described funnel.

The device of measurement apparent density the most according to claim 1 and 2, it is characterised in that described dress Putting the clamping unit also included for fixing described graduated cylinder, one end of described clamping unit is fixedly arranged on rotationally On described fixed part, its other end is arranged on described graduated cylinder.

The device of measurement apparent density the most according to claim 3, it is characterised in that described card-tight part Part includes semicircular fixture and rotates bar, and one end of described rotation bar can be fixedly arranged on described with horizontally rotating On fixed part, the other end of described rotation bar is fixedly arranged on described semicircular fixture；Described semicircular Fixture is arranged on described graduated cylinder.