Volume testing device

Abstract

The utility model relates to the technical field of volume testing, and discloses a volume testing device which comprises an electronic scale base and a liquid storage tank, a weighing support in a base shell is provided with a first protruding contact electrically connected with a temperature controller, and the bottom face of a scale pan is provided with a first groove contact correspondingly matched with the first protruding contact. The top face of the weighing pan is provided with a second groove contact correspondingly connected with the first groove contact, the bottom face of the liquid storage tank is provided with a second protruding contact correspondingly matched with the second groove contact, the second protruding contact is electrically connected with a thermoelectric refrigerating unit in the bottom of the liquid storage tank, and the upper portion of the liquid storage tank is provided with a water guide pipe. Based on the combination of a drainage method and temperature control, the volume change and the expansion characteristic of an object are accurately calculated by measuring the weight change of a test liquid caused by the object in a liquid storage tank at different temperatures and combining the dynamic influence of different temperatures on the density of the test liquid. The device has the characteristics of high measurement precision, convenience in operation, strong practicability, small influence of environment temperature, wide application range and good use effect.

Description

TECHNICAL FIELD

[0001] The utility model relates to product volume test technical field especially irregular product and packing's volume test, and the utility model provides a volume test device. BACKGROUND

[0002] In the production of wet wipes, the characterization test of wet wipes is often concentrated on the detection in two-dimensional plane, such as the length and width of the wet wipe package film, the length and width of the wet wipe white sheet, the height of the wet wipe, etc. However, for obtaining the overall volume of the wet wipe, the current method is to estimate the value of length x width x height through a formula, which is not accurate enough. Moreover, due to the different degrees of expansion of the wet wipe at different temperatures, it is difficult to obtain the volume expansion ratio of different wet wipes at different temperatures through formula calculation. However, measuring the volume, volume expansion or contraction ratio of the wet wipe is very helpful for the production, storage and transportation of the wet wipe.

[0003] In the prior art, the patent application for invention with publication number CN107941652A discloses a detection method and device for the density of irregular-shaped solid without holes, and the patent with publication number CN211205425U discloses a high-precision volume measuring device based on the drainage method, which is particularly suitable for products and packaging with irregular shapes. However, the above-mentioned prior art has the disadvantage that it is inconvenient to adjust the temperature of the test liquid to measure the volume and volume expansion or contraction ratio of the product at different temperatures.

[0004] Therefore, the applicant innovatively designs the volume test device of the present application, which is aimed at measuring the volume and volume expansion or contraction ratio of the product at different temperatures through temperature control and quality detection. It is not only suitable for the volume measurement of wet wipes and other sanitary products, but also suitable for other objects that can be measured by the drainage method. SUMMARY

[0005] The utility model provides a volume test device to solve the problems raised in the background art.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0007] The utility model provides a volume testing device, including electronic scale base and liquid storage tank, electronic scale base includes base shell and the weighing support that sets up in base shell, is provided with the scale pan on the weighing support, the liquid storage tank sets up on the scale pan, first protruding contact is provided with on the weighing support with the temperature controller in the base shell electricity connection, the scale pan bottom surface is provided with the first recessed contact corresponding with first protruding contact cooperation, the scale pan top surface is provided with the second recessed contact corresponding with first recessed contact connection, the liquid storage tank bottom surface is provided with the second protruding contact corresponding with second recessed contact cooperation, and second protruding contact is electrically connected with the thermoelectric refrigerator in the bottom of liquid storage tank, the upper portion of liquid storage tank is provided with the water guide pipe.

[0008] Preferably, the liquid storage tank is a heat-insulated liquid storage tank, which comprises a tank body and a top cover, and a heat-insulating layer is arranged in the tank body and the top cover.

[0009] Further preferably, a support frame is arranged on the base shell of the electronic scale base, and a top seat is arranged on the top of the support frame through a horizontal rod, and a temperature monitor extending into the liquid storage tank is arranged on the top seat.

[0010] A liquid adding funnel extending into the liquid storage tank is further arranged on the top seat.

[0011] A first display screen, a second display screen and a temperature control knob are arranged on the base shell of the electronic scale base.

[0012] Still further preferably, the support frame comprises an upper tube and a lower tube connected in an extendable manner, and the wires of the temperature monitor are connected to the temperature controller in the base shell through the upper tube and the lower tube of the support frame.

[0013] Still further preferably, a limiting partition plate is arranged in the liquid storage tank, and through holes are arranged on the limiting partition plate.

[0014] The limiting partition plate comprises a first partition plate and a second partition plate connected through a rotating shaft, and the first partition plate has a limiting clamping table extending to the bottom of the second partition plate.

[0015] The volume testing device of the utility model is based on the combination of drainage method and temperature control, the weight change of the test liquid caused by the object in the liquid storage tank at different temperatures is measured, the dynamic influence of different temperatures on the density of the test liquid is combined, and the volume change and expansion characteristics of the object are accurately calculated. The core is to realize the synchronous monitoring of temperature and weight, and the liquid level is adjusted by the hydrophobic valve to make the height stable at the calibrated test liquid level, so that the total volume of the object and the test liquid remains constant, thereby eliminating the influence of liquid level fluctuation caused by temperature change on volume calculation.

[0016] The utility model has the characteristics of high measurement precision, convenient operation, strong practicability, small influence of environmental temperature, wide application range and good use effect, and is worth popularizing and using. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a structural schematic view of an embodiment of the present application;

[0018] Figure 2 is a side view structural schematic view of a limiting partition plate in an embodiment of the present application. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0020] Referring to Figure 1 and 2 A volume testing device includes an electronic scale base 1 and a liquid storage tank 2. The electronic scale base 1 includes a base shell and a weighing support 3 arranged in the base shell. The weighing support 3 is provided with a weighing pan 4. The liquid storage tank 2 is arranged on the weighing pan 4. The weighing support 3 is arranged on a weighing base in the base shell through a pressure sensor and realizes weighing through a weighing controller, which is not shown in the figure. The base shell is further provided with a power switch 1-1 to control the power on / off of the device and a calibration peeling button 1-2 electrically connected with the weighing controller, which both belong to the prior art and will not be described in detail. The liquid storage tank 2 is a heat-insulated liquid storage tank, which includes a tank body 2-4 and a top cover 2-5. Both the tank body 2-4 and the top cover 2-5 are provided with a heat-insulating layer, so that the temperature in the liquid storage tank 2 remains relatively stable, reducing or avoiding the influence of the external environment temperature on the temperature in the tank and improving the accuracy of the test. The liquid storage tank 2 is provided with a limiting partition plate 7. The limiting partition plate 7 is provided with through holes and is clamped in the liquid surface of the liquid storage tank 2 through a limiting protrusion 2-6 in the liquid storage tank 2, so as to limit the measured object in the test liquid and avoid floating. The limiting partition plate 7 in the embodiment includes a first partition plate 7-1 and a second partition plate 7-2 connected through a rotating shaft 7-3. The first partition plate 7-1 is provided with a limiting clamping table 7-4 extending to the bottom of the second partition plate 7-2.

[0021] The weighing support 3 is provided with a first protruding contact 3-1 electrically connected with the temperature controller 5 in the base shell, the bottom surface of the weighing pan 4 is provided with a first recessed contact 4-1 corresponding to the first protruding contact 3-1, the top surface of the weighing pan 4 is provided with a second recessed contact 4-2 corresponding to the first recessed contact 4-1, the bottom surface of the liquid storage tank 2 is provided with a second protruding contact 2-1 corresponding to the second recessed contact 4-2, and the second protruding contact 2-1 is electrically connected with the thermoelectric cooler 6 in the bottom of the liquid storage tank 2, so that the temperature controller 5 is electrically connected with the thermoelectric cooler 6 through the first protruding contact 3-1, the first recessed contact 4-1, the second recessed contact 4-2 and the second protruding contact 2-1 in sequence, and the temperature of the liquid in the liquid storage tank 2 is regulated. The upper part of the liquid storage tank 2 is provided with a water guide pipe 2-2, the water guide pipe 2-2 is provided with a drain valve 2-3, and a calibration test liquid level is formed in the liquid storage tank 2 flush with the upper end of the water guide pipe 2-2.

[0022] The base shell of the electronic scale base 1 is provided with a support frame 8, the top of the support frame 8 is provided with a top seat 10 through a cross rod 9, and the top seat 10 is provided with a temperature monitor 11 extending into the liquid storage tank. The temperature monitor 11 can directly suspend a thermometer for temperature monitoring, or a temperature probe can be combined with a temperature controller and an electronic display screen to directly convert the temperature into a temperature value for display, which is more accurate and improves the accuracy of density correction. The base shell of the electronic scale base 1 is provided with a first display screen 1-3 and a second display screen 1-4 for displaying the mass and temperature data of the test liquid respectively, and is also provided with a temperature control knob 1-5 connected with the temperature controller 5 to regulate the temperature of the liquid. The top seat 10 is also provided with a liquid adding funnel 12 extending into the liquid storage tank 2 to supplement the test liquid in the liquid storage tank 2 in time. The temperature monitor 11 and the liquid adding funnel 12 are arranged on the top seat 10 through the through holes in the top seat 10, and the top cover 2-5 has through holes corresponding to the gaps of the two, so that they pass through and extend into the liquid storage tank 2.

[0023] In the embodiment, the support frame 8 includes an upper pipe 8-2 and a lower pipe 8-1 connected in an extension mode, the lower pipe 8-1 is provided with a locking knob abutting the upper pipe 8-1 through the lower pipe 8-1 to control the lifting adjustment and locking of the support frame 8, so as to realize the lifting of the temperature probe and the liquid adding funnel. After being lifted, the top cover 2-5 can be opened to take and place the limiting partition plate 7 and the wet wipe package and other articles 13. The inside of the connection between the lower pipe 8-1 and the base shell has a wire passing hole, the lead wire of the temperature monitor 11 passes through the upper pipe 8-2 and the lower pipe 8-1 of the support frame 8 and is electrically connected with the temperature controller 5 in the base shell, and the temperature of the test liquid is displayed in real time through the second display screen 1-4. The lead wire has a spiral disc excess part at both ends of the upper pipe 8-2.

[0024] The working principle of the volume testing device is as follows: based on the combination of the drainage method and temperature control, the weight change of the testing liquid caused by the article in the liquid storage tank 2 at different temperatures is measured, the dynamic influence of the temperature on the density of the testing liquid is combined, and the volume change and expansion characteristics of the article are accurately calculated.

[0025] Specifically, the working process is as follows: (1) initial calibration stage: the wet wipes are placed in the liquid storage tank 2 and the limiting partition plate 7 is arranged to prevent the influence of the buoyancy. The calibration peeling button 1-2 is zeroed, the testing liquid is added to the calibration testing liquid level or to the water guide pipe 2-2 after the liquid flows out, and the initial liquid weight m0 is recorded. According to the known liquid volume V r at the calibration line, the density p0 under the current temperature T0, and the initial volume V0 of the wet wipes V r -m0 / p0 is calculated.

[0026] (2) shrinkage test stage in the cooling process: the target temperature T1 is set through the temperature knob 1-5, the thermoelectric cooler 6 is cooled, the temperature monitor 11 monitors the actual temperature, and after the temperature is stable for a certain period of time, the liquid level is lowered below the calibration testing liquid level due to the shrinkage of the wet wipes, the testing liquid is added to the calibration testing liquid level, and the liquid weight m1 is recorded. According to the liquid density p1 under the current T1 temperature, the volume V1 of the wet wipes after shrinkage V r -m1 / p1 is calculated.

[0027] (3) expansion test stage in the heating process: the target temperature T2 is set through the temperature knob 1-5, the thermoelectric cooler 6 is heated, the temperature monitor 11 monitors the actual temperature, and after being stable for a certain period of time. The wet wipes are expanded due to heating, the liquid level is raised above the calibration testing liquid level, the drain valve 2-3 is opened to drain the excess liquid to the calibration testing liquid level, and the liquid weight m2 is recorded. According to the liquid density p2 under the current T2 temperature, the volume V2 of the wet wipes after expansion V r -m2 / p2 is calculated.

[0028] (4) cycle test and data analysis: the heating and cooling operations are repeated, a plurality of temperature points (T n ) corresponding to the liquid weight m n and the volume V n of the wet wipes are obtained. The thermal response characteristics of the wet wipes are analyzed through the formula expansion / shrinkage ratio=AV / V0x100% (AV is the volume change).

[0029] The test liquid of the present application is not limited to water, but can also be alcohol and the like, and the test object is not limited to wet wipes and the like, but can also be used for other objects suitable for drainage method measurement. In the present embodiment, the test temperature of the wet wipes is not higher than 50 DEG C, so that for objects requiring higher temperature testing, other high-temperature-resistant test liquids can be used.

[0030] The above is the preferred embodiment of the present application, and the protection scope of the present application is not limited thereto. For example, the device can also be provided with a program calculator and a parameter setting button, and through program calculation, the volume and expansion / contraction ratio of the test object at different temperatures can be directly displayed.

[0031] Therefore, equivalent changes made in accordance with the structure, shape and principle of the present application shall be covered within the protection scope of the present application.

Claims

1. A volume testing device comprising an electronic scale base and a liquid storage tank, the electronic scale base comprising a base housing and a scale support arranged within the base housing, the scale support being provided with a scale pan, the liquid storage tank being arranged on the scale pan, characterized in that: The weighing support is provided with a first protruding contact electrically connected with a temperature controller in the base shell, the bottom surface of the weighing pan is provided with a first recessed contact corresponding to the first protruding contact, the top surface of the weighing pan is provided with a second recessed contact corresponding to the first recessed contact, the bottom surface of the liquid storage tank is provided with a second protruding contact corresponding to the second recessed contact, the second protruding contact is electrically connected with a thermoelectric refrigerator in the bottom of the liquid storage tank, and the upper portion of the liquid storage tank is provided with a water guide pipe.

2. The volume testing device of claim 1, wherein: The liquid storage tank is a heat-preservation and heat-insulation liquid storage tank.

3. The volume testing device of claim 1, wherein: The base shell of the electronic scale base is provided with a support frame, the top of the support frame is provided with a top base through a horizontal rod, and the top base is provided with a temperature monitor extending into the liquid storage tank.

4. The volume testing device of claim 3, wherein: The top base is also provided with a liquid adding funnel extending into the liquid storage tank.

5. The volume testing device of claim 3, wherein: The base shell of the electronic scale base is provided with a first display screen, a second display screen and a temperature control knob.

6. The volume testing device of claim 3, wherein: The support frame comprises an upper pipe and a lower pipe connected in an extension mode, and the wires of the temperature monitor are electrically connected with the temperature controller in the base shell through the upper pipe and the lower pipe of the support frame.

7. The volume testing device of claim 1, wherein: The liquid storage tank is provided with a limiting partition plate, and the limiting partition plate is provided with a through hole.

8. The volume testing device of claim 7, wherein: The limiting partition plate comprises a first partition plate and a second partition plate connected through a rotating shaft, and the first partition plate has a limiting clamping table extending to the bottom of the second partition plate.

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