CN106383068A - Method for determining density of graphite center rod lubricant - Google Patents

Abstract

The invention relates to a method for determining density of a graphite center rod lubricant. The method comprises the following steps: 1. selecting the determination mode of a solid-liquid dual-purpose densimeter as a liquid mode; 2. carrying out correction on the solid-liquid dual-purpose densimeter; and 3. measuring the density of the graphite center rod lubricant. Compared with the weight cup process according to GB/T13354-92, the method provided by the invention has the advantages of fewer operation steps and good detection effect, can perform continuous detection, and is especially suitable for random sampling detection in factory mass production.

Description

A kind of method measuring central graphite rod lubricant density

Technical field

The present invention relates to technical field of chemical detection, particularly to a kind of method measuring central graphite rod lubricant density.

Background technology

Central graphite rod lubricant is a kind of dark thick shape fluid lubricant, and product selects pure natural scale fine graphitic Powder, coalescents, antioxidant, extreme pressure anti-wear additives, stabilizer etc. are compounding to be processed, and is generally sprayed during hot rolled seamless steel tube It is applied to mandrel surface, rise to mandrel lubrication, improve plug service life, improve steel pipe inner wall quality and reduce tandem mill electric current Effect.

Lubricant production factory needs when preparing central graphite rod lubricant strictly to control its density, can extract big every time The sample of amount is detected, when measuring central graphite rod lubricant density, because lubricant is formulated using graphite, its Color is very black, viscosity is higher, cannot be measured using standard method such as densimeter method, Westphal balance method or density bottle method completely, It is typically only capable in the industry measure using volume one gravimetric method or weight agar diffusion method at present, said determination method operating procedure is more, Detection efficiency is relatively low.

Content of the invention

The technical problem to be solved in the present invention is to provide a kind of method measuring central graphite rod lubricant density, and the method is grasped Make step less, detection efficiency is high.

In order to solve above-mentioned technical problem, the present invention adopts the following technical scheme that：A kind of mensure central graphite rod lubricant is close The method of degree, comprises the following steps：

The first step, model selection；

Densitometric for Solid/liquid two purpose mode determination is chosen to be liquid pattern；

Second step, Solid/liquid two purpose densimeter is corrected；

3rd step, the density to central graphite rod lubricant measure；

1）, start density measure；

2）, in beaker injection testing sample to 50ml graduation mark, be then put in measurement bay central authorities underface, will hook top End hook is hung on measurement bay central authorities, hook end is immersed in testing sample, button makes the mass figures on display screen be zeroed；

3）, 50g standard test weight is hung on hook end allow it to be completely submerged in testing sample, ensure standard test weight not simultaneously Touch beaker, testing sample surface does not produce bubble and do not overflow outward, read the density value of display screen display, this density value It is the density value of testing sample；

4）, take off standard test weight, after cleaning and wiping, by above-mentioned 2）With 3）Step continue measure other samples density.

The present invention to be surveyed using the Solid/liquid two purpose densimeter of the solution being used for measuring simple solid/simple in prior art Determine the density of the solid-liquid mixed-phase material central graphite rod lubricant of high viscosity, compare according to the weight in GB/T13354-92 Agar diffusion method, operating procedure of the present invention is less, can be with follow-on test, and Detection results are higher, is particularly suitable for when factory mass produces Sampling Detection is applied.

Specific embodiment

In order to allow those skilled in the art more clearly understand the improvements of hinge structure of the present invention, with reference to The present invention is further illustrated for embodiment, the content that embodiment refers to not limitation of the invention.

Need to illustrate in advance there is multiple Solid/liquid two purpose densimeters, the Solid/liquid two purpose of different brands at present on the market Marking keys on densimeter can be slightly different, but it is used for measuring the operating procedure of central graphite rod lubricant density substantially all It is the same.For simplifying statement, only list " Da Hongmei opens up " board producing using Dongguan Hong Tuo Instrument Ltd., type below Number for " DH-300X " the example to measure central graphite rod lubricant density for the Solid/liquid two purpose gravimeter.

Step one, model selection；

The machine has two measurement patterns, solid mode and liquid pattern, must be selected before test：Start is defaulted as solid Bulk-mode, shows M on the right of screen, now for solid mode, press【A】Key is switched to liquid pattern, shows W, now on the right of screen For liquid pattern.

Step 2, correction；

1）Solid-liquid one densimeter is plugged in, warming-up 2～30 minutes, such as start do not show [0.000] please by【ZERO】 Key makes it be zeroed.

2）In the state of display [0.000], length is pressed【ZERO】Key, until display【CAL】When let go.

3）Show in instrument【100.000】Or【200.000】And constantly flash, now please 100g or 200g counterweight is placed In test desk center, now instrument can be corrected automatically, when display on screen【END】When, screen display【100.000】Then school Just complete.

4）Take off counterweight, gravimeter automatically returns to test pattern and shows【0.000】.

Step 3, density measure；

1）Press【ENTER】Key starts density measure, and now density represents symbol and points to SG.

2）In beaker, injection testing sample, to 50ml graduation mark, is then put in the underface in measurement bay central authorities, by " J " Shape is hooked in measurement bay central authorities, and " J " shape hook distal portion need to be immersed in testing sample, presses【ZERO】Key is zeroed.

3）50g standard test weight is hung and links up with end with " J " shape and allow it to be completely submerged in testing sample, now show The density values of screen display are the density value of testing sample, notice that continuous mode Plays counterweight must not touch beaker, to be measured Sample surfaces must not have bubble and must not be excessive.

4）Take off standard test weight, after cleaning and wiping, repeat above-mentioned 2）To 3）Step, can continue to measure other samples Density.

5）Mensure takes off standard test weight after terminating, and presses【ENTER】Key is back to zero point state to be measured.

Can be seen that the present invention from said determination process and compare weight agar diffusion method GB/T13354-92, its operating procedure Less, can be with follow-on test, detection efficiency wants weight/power ratio agar diffusion method much higher, is particularly well-suited to sampling when factory mass produces Detection.

Above-described embodiment is the present invention preferably implementation, and in addition, the present invention can be realized with alternate manner, Without departing from obvious replacement any on the premise of the technical program design all within protection scope of the present invention.

In order to allow those of ordinary skill in the art more easily understand the improvements that the present invention is with respect to prior art, this Some descriptions of invention have been simplified, and for the sake of clarity, present specification is omitted some other elements, ability Domain those of ordinary skill should be aware that the element that these omit also may make up present disclosure.

Claims (1)

1. a kind of method measuring central graphite rod lubricant density, comprises the following steps：

The first step, model selection；

Densitometric for Solid/liquid two purpose mode determination is chosen to be liquid pattern；

Second step, Solid/liquid two purpose densimeter is corrected；

3rd step, the density to central graphite rod lubricant measure；

1）, start density measure；

2）, in beaker injection testing sample to 50ml graduation mark, be then put in measurement bay central authorities underface, will hook top End hook is hung on measurement bay central authorities, hook end is immersed in testing sample, button makes the mass figures on display screen be zeroed；

3）, 50g standard test weight is hung on hook end allow it to be completely submerged in testing sample, ensure standard test weight not simultaneously Touch beaker, testing sample surface does not produce bubble and do not overflow outward, read the density value of display screen display, this density value It is the density value of testing sample；

4）, take off standard test weight, after cleaning and wiping, by above-mentioned 2）With 3）Step continue measure other samples density.