Density measurement device and method

Abstract

The embodiment of the present invention discloses a density measurement device and method. The device includes: a support frame, a guide column, an adjustment mechanism, a hanging scale, a counterweight basket and a liquid tank; the guide column is fixed inside the support frame, the top end of the guide column is fixed to the top plate of the support frame, and the bottom end is fixed to the bottom plate of the support frame; inside the support frame, the adjustment mechanism, the hanging scale, the counterweight basket and the liquid tank are arranged in sequence from top to bottom in the vertical direction; the adjustment mechanism is movably connected to the guide column, and the bottom is connected to the hanging scale and the counterweight basket in sequence; the liquid tank is placed on the bottom plate of the support frame, and the top opening can accommodate the counterweight basket. The flexibility of measurement is improved; there is no need to solidify the buoyancy material, which saves the detection cost, does not affect the strength of the shell material, and improves the quality of the finished product; the density measurement of the density greater than water, less than water or equal to water can be realized, which improves the universality.

Description

Technical Field

[0001] The present invention relates to the field of data measurement, and in particular to a density measurement device and method. Background Art

[0002] A certain aluminum alloy thin-walled rotating body structural part requires positive buoyancy when used in deep water, and needs to be installed and coated with low-density, high-strength materials. Due to factors such as the complex internal structure of the parts, cost, and the special processability of low-density, high-strength material molding, it is necessary to coat the uncured low-density material inside the product parts, and then pre-cure or heat-cure them. The low-density material will expand in volume during the curing process, resulting in a change in density, and the flow of the material during the curing process will cause the boundary to not adhere to the shape after curing, etc. It is necessary to continuously measure the density during and after the curing process during the production process to provide guidance for later production.

[0003] The existing technology calculates the weight of the shell before / after coating and the drainage mass to obtain the density of the coated buoyancy material. However, this method will cause the following problems: 1) The weight and volume of the shell after coating are large, and a large water tank is required for measurement, which makes it difficult to achieve flexible operation; 2) The curing process requires a large oven, and the cost of testing and inspection is high; 3) At present, the direct coating on the product is heated and insulated for curing, which reduces the strength of the shell material; 4) The drainage method used by most equipment measures a material density greater than the density of water.

[0004] There is currently no effective solution to the above problems in the prior art. Summary of the invention

[0005] In order to solve the above problems, the present invention provides a density measuring device and method. By setting a liftable adjustment device, the hanging scale and the counterweight basket are dropped into the water of the liquid tank at the same time, and the density of the buoyancy material is obtained after buoyancy calculation, so as to solve the problems in the prior art that the overall measurement of the shell after the floating material is coated is difficult, the detection cost is high, the performance of the floating material is affected, and the material density is greater than water and is difficult to measure.

[0006] To achieve the above-mentioned purpose, an embodiment of the present invention provides a density measuring device, including: a supporting frame, a guide column, an adjustment mechanism, a hanging scale, a counterweight basket and a liquid containing tank; the guide column is fixed inside the supporting frame, and its top end is fixed to the top plate of the supporting frame, and its bottom end is fixed to the bottom plate of the supporting frame; in the vertical direction inside the supporting frame, an adjustment mechanism, a hanging scale, a counterweight basket and a liquid containing tank are arranged in sequence from top to bottom; the adjustment mechanism is movably connected to the guide column, and the bottom is connected to the hanging scale and the counterweight basket in sequence; the liquid containing tank is placed on the bottom plate of the supporting frame, and its top opening can allow the counterweight basket to pass through.

[0007] Further optionally, the adjustment mechanism includes: an adjustment frame, a baffle, a pressure rod, and an elastic member; a first opening is provided at the top of the adjustment frame, and a second opening is provided at the bottom, the first opening corresponds to the position of the second opening, and can allow the guide column to pass through; the pressure rod penetrates from the outer side of the top plate of the adjustment frame and is movably connected to the adjustment frame; the baffle is obliquely arranged inside the adjustment frame, one end of which is fixed to the inner side wall of the adjustment frame, and the other end is fixed to the end of the pressure rod passing through the adjustment frame; the baffle is provided with a through hole for clamping the guide column; the elastic member is arranged inside the adjustment frame and is sleeved on the guide column, one end of which is abutted against the bottom surface of the baffle, and the other end is abutted against the bottom plate of the adjustment frame.

[0008] Further optionally, the elastic member is a spring.

[0009] Further optionally, the counterweight basket is connected to the hanging scale via a locking rod.

[0010] Further optionally, a counterweight piece is provided inside the counterweight basket; and a movable door panel is provided on the surface of the counterweight basket.

[0011] Further optionally, the vertical center line of the adjustment mechanism, the vertical center line of the hanging scale, the vertical center line of the counterweight basket and the vertical center line of the liquid tank are the same straight line.

[0012] On the other hand, the present invention also provides a density measurement method, which uses the above-mentioned density measuring device for measurement, including: resetting the reading of the hanging scale to zero; connecting a counterweight basket to the hanging scale, and recording a first reading m displayed by the hanging scale; placing the object to be measured into the counterweight basket, and recording a second reading m1 displayed by the hanging scale; taking out the object to be measured, adjusting the adjustment mechanism to immerse the entire counterweight basket in a liquid tank filled with water, and recording a third reading m2 of the hanging scale; adjusting the adjustment mechanism to make the entire counterweight basket float to the surface of the water, placing the object to be measured in the counterweight basket, adjusting the adjustment mechanism to make the entire counterweight basket immersed in a liquid tank filled with water, and recording a fourth reading m3 of the hanging scale; calculating the density of the object to be measured based on the first reading m, the second reading m1, the third reading m2 and the fourth reading m3.

[0013] Further optionally, the density of the object to be measured is calculated according to the first indication m, the second indication m1, the third indication m2 and the fourth indication m3 by the following calculation formula:

[0014]

[0015] The above technical scheme has the following beneficial effects: by adding weights to the buoyancy material to be measured, the mass in the air and in water is measured respectively, and finally the density of the buoyancy material is obtained, thereby abandoning the previous scheme of measuring after the buoyancy material is coated on the shell, thereby improving the flexibility of measurement; there is no need to solidify the buoyancy material, thus saving the detection cost, not affecting the strength of the shell material, and improving the quality of the finished product; the density measurement of the density greater than water, less than water or equal to water can be realized, thereby improving universality. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 is a schematic structural diagram of a density measuring device provided by an embodiment of the present invention;

[0018] Figure 2 is a partial enlarged structural schematic diagram of the regulating structure provided by an embodiment of the present invention;

[0019] Figure 3 It is a flow chart of a density measurement method provided by an embodiment of the present invention.

[0020] Reference numerals: 1-support frame 101-top plate 102-bottom plate 2-guide column 3-adjustment mechanism 301-adjustment frame 302-blocking piece 303-pressing rod 304-elastic member 305-connecting member 4-hanging scale 5-weight basket 6-liquid storage tank 7-locking rod DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] In order to solve the above problems that the overall measurement of the shell after the floating material is coated is difficult, the detection cost is high, the performance of the floating material is affected, and the material density is greater than that of water and is difficult to measure, the present invention provides a density measuring device. Figure 1It is a structural schematic diagram of a density measuring device provided by an embodiment of the present invention, and the device includes: a supporting frame 1, a guide column 2, an adjusting mechanism 3, a hanging scale 4, a counterweight basket 5 and a liquid containing tank 6; the guide column 2 is fixed inside the supporting frame 1, one end of which is fixed to the top plate 101 of the supporting frame 1, and the other end is fixed to the bottom plate 102 of the supporting frame 1; inside the supporting frame 1, the adjusting mechanism 3, the hanging scale 4, the counterweight basket 5 and the liquid containing tank 6 are arranged in sequence from top to bottom in the vertical direction; the adjusting mechanism 3 is movably connected to the guide column 2, and the bottom is connected to the hanging scale 4 and the counterweight basket 5 in sequence; the liquid containing tank 6 is placed on the bottom plate of the supporting frame 1, and its top opening can allow the counterweight basket 5 to pass through.

[0023] like Figure 1 As shown, the cross-section of the measuring device is square, and an integral supporting frame 1 is provided on the outside thereof. The supporting frame 1 includes a top plate 101 and a bottom plate 102. A guide column 2 is fixed between the top plate 101 and the bottom plate 102, with both ends passing through the top plate 101 and the bottom plate 102 respectively and fixed by fastening screws.

[0024] The liquid holding tank 6 is placed or fixed on the bottom plate 102 for holding the solution, and the liquid holding tank 6 is located on one side of the guide column 2, with an open top for pouring or taking out the solution. In this embodiment, water is poured into the liquid holding tank 6 for density measurement. As an optional embodiment, the liquid holding tank 6 is a beaker.

[0025] The guide column 2 is also movably connected with an adjusting device, and the adjusting mechanism 3 can be controlled to make the adjusting mechanism 3 rise and fall to meet the measurement requirements.

[0026] A hanging scale 4 is connected to the bottom of the adjusting device, and a counterweight basket 5 is connected to the bottom of the hanging scale 4. When the adjusting device is raised or lowered, the hanging scale 4 and the counterweight basket 5 are raised or lowered simultaneously. In this way, the height adjustment of the counterweight basket 5 in the air or in the liquid tank 6 can be achieved by controlling the adjusting device. During the lifting process, the hanging scale 4 always displays the weight of the connected counterweight basket 5. By collecting and calculating the readings of the hanging scale 4 under different states, the final density of the buoyancy material is obtained. In addition, the hanging scale 4 and the counterweight basket 5 are both located on the side of the guide column 2 where the liquid tank 6 is placed, and are suspended above the liquid tank 6. During the lifting process, the counterweight basket 5 can enter or leave the liquid tank 6 through the opening at the top of the liquid tank 6.

[0027] As an optional implementation, Figure 2 is a partial enlarged structural diagram of the regulating structure provided by an embodiment of the present invention, such as Figure 2As shown, the adjustment mechanism 3 includes: an adjustment frame 301, a baffle 302, a pressure rod 303, and an elastic member 304; a first opening is provided at the top of the adjustment frame 301, and a second opening is provided at the bottom, and the positions of the first opening and the second opening correspond to each other, and the guide column 2 can pass through; the pressure rod 303 penetrates from the outside of the top plate 101 of the adjustment frame 301, and is movably connected to the adjustment frame 301; the baffle 302 is obliquely arranged inside the adjustment frame 301, one end of which is fixed to the inner side wall of the adjustment frame 301, and the other end is fixed to the end of the pressure rod 303 penetrating the adjustment frame 301; the baffle 302 is provided with a through hole for clamping the guide column 2; the elastic member 304 is arranged inside the adjustment frame 301, and is sleeved on the guide column 2, one end of which is against the bottom surface of the baffle 302, and the other end is against the bottom plate 102 of the adjustment frame 301.

[0028] like Figure 2 As shown, the cross section of the adjustment mechanism 3 is square, and the outside is an adjustment frame 301, and corresponding openings are respectively opened at the top and bottom of the adjustment frame 301. The guide column 2 passes through the top opening and the bottom opening of the adjustment frame 301, and the opening size is slightly larger than the diameter of the guide column 2, so that when the friction force provided by the baffle 302 to the guide column 2 is reduced, the adjustment frame 301 can fall along the guide column 2.

[0029] The pressure rod 303 passes through the top of the adjustment frame 301 and is movably connected to the top of the adjustment frame 301. The length of the pressure rod 303 inside the adjustment frame 301 can be increased by pressing. The end of the pressure rod 303 passing through the adjustment frame 301 is connected to the baffle 302 inside the adjustment.

[0030] The baffle 302 is obliquely arranged inside the adjustment frame 301, one end of which is fixed on a side wall of the adjustment frame 301, and the other end is inclined upward and connected to the end of the pressure rod 303 entering the adjustment frame 301. A through hole is provided on the surface of the baffle 302, and the guide column 2 can pass through the through hole. In the natural state, that is, when the pressure rod 303 is not pressed, due to the oblique arrangement of the baffle 302, there will be a large friction between the through hole and the guide column 2, so that the adjustment mechanism 3 is fixed on the guide column 2 as a whole and will not fall. At this time, the hanging scale 4 and the counterweight basket 5 are both suspended in the air; when the pressure rod 303 is pressed, one end of the baffle 302 gradually tends to be horizontal, and the friction force generated by the through hole on the guide column 2 gradually decreases until the friction force is less than the overall gravity, and the adjustment frame 301 begins to fall. When the adjustment frame 301 falls to a predetermined position, the pressure rod 303 is released to reposition the adjustment frame 301.

[0031] The elastic member 304 is arranged between the bottom of the baffle 302 and the bottom of the adjustment frame 301, giving the baffle 302 an upward supporting force so that the baffle 302 can clamp the guide rod in a natural state. When the pressure rod 303 is pressed and released, one end of the baffle 302 is forced to move upward and restore the inclined state.

[0032] In addition, in order to meet the connection between the hanging scale 4 and the adjusting mechanism 3, the adjusting mechanism 3 fixes one end of the connecting piece 305, and the other end of the connecting piece 305 is connected to the hanging scale 4, and the connecting piece 305 and the hanging scale 4 are set as a detachable structure.

[0033] As an optional implementation, the elastic member 304 is a spring.

[0034] As an optional implementation, the counterweight basket 5 is connected to the hanging scale 4 via a locking rod 7 .

[0035] like Figure 1 As shown, the counterweight basket 5 is connected to the hanging scale 4 through a locking rod 7 to prevent the counterweight basket 5 from falling off. One end of the locking rod 7 is detachable from the locking rod 7 of the hanging scale 4, and the other end is fixed to the top of the counterweight basket 5 to facilitate the loading and unloading of the counterweight basket 5.

[0036] As an optional implementation, a counterweight piece is provided inside the counterweight basket 5 ; and a movable door panel is provided on the surface of the counterweight basket 5 .

[0037] Since the objects to be measured are mostly small buoyant materials with small weight, it is necessary to add a counterweight in the counterweight basket 5 to assist the measurement, and the counterweight may be one or more. Preferably, the counterweight is a metal piece with a weight mark.

[0038] The surface of the counterweight basket 5 is provided with a movable door panel, which is convenient to open to take out the object to be measured and the counterweight.

[0039] As an optional embodiment, the counterweight basket 5 may be provided with a plurality of drainage holes or drainage fences to facilitate the drainage of immersed water.

[0040] As an optional implementation, the vertical center line of the adjustment mechanism 3, the vertical center line of the hanging scale 4, the vertical center line of the counterweight basket 5 and the vertical center line of the liquid tank 6 are the same straight line.

[0041] like Figure 1 As shown, the vertical center lines of the adjustment mechanism 3, the hanging scale 4, the counterweight basket 5 and the liquid containing tank 6 are the same straight line, which improves the accuracy of the measurement.

[0042] The present invention also provides a density measurement method, which uses the above-mentioned density measurement device to perform measurement. Figure 3 is a flow chart of a density measurement method provided by an embodiment of the present invention, such as Figure 3 As shown, the method includes:

[0043] S1. Return the reading of the hanging scale 4 to zero;

[0044] S2, connecting the counterweight basket 5 to the hanging scale 4, and recording the first indication m displayed by the hanging scale 4;

[0045] S3, putting the object to be measured into the counterweight basket 5, and recording the second indication m1 displayed by the hanging scale 4;

[0046] S4, take out the object to be measured, adjust the adjustment mechanism 3 to immerse the weight basket 5 completely into the liquid tank 6 filled with water, and record the third reading m2 of the hanging scale 4;

[0047] S5, adjusting the adjusting mechanism 3 so that the counterweight basket 5 is completely above the water surface, putting the object to be measured in the counterweight basket 5, adjusting the adjusting mechanism 3 so that the counterweight basket 5 is completely immersed in the liquid tank 6 filled with water, and recording the fourth reading m3 of the hanging scale 4;

[0048] S6. Calculate the density of the object to be measured according to the first indication m, the second indication m1, the third indication m2 and the fourth indication m3.

[0049] The weight of the counterweight basket 5 is a constant value m, in g; the weight of the counterweight basket 5 and the object to be measured is m1, in g; when the counterweight basket 5 is immersed in water alone, the reading of the hanging scale 4 is m2, in g; when the counterweight basket 5 and the object to be measured are immersed in water together, the reading of the hanging scale 4 is m3, in g.

[0050] As an optional implementation, the density of the object to be measured is calculated according to the first indication m, the second indication m1, the third indication m2 and the fourth indication m3, and is calculated by the following calculation formula:

[0051]

[0052] The derivation process of this formula is as follows:

[0053] (m1-m)*g+m2*g-ρ*g*V 排 =m3*g

[0054] That is, the difference between the upward buoyancy and the downward gravity forms the reading of the electronic scale.

[0055]

[0056]

[0057]

[0058]

[0059] Specific embodiment 1:

[0061] The embodiment of the present invention can be applied to the density measurement of materials with a density less than that of water and that do not absorb water, and also to the density measurement of metals and non-metals with a density greater than that of water and that do not absorb water. In this embodiment, the object to be measured is a buoyant material (maximum size 50mm×50mm×30mm).

[0062] 1) Electronic crane scale 4 is reset to zero;

[0063] 2) Fix the counterweight basket 5 on the electronic crane scale 4 through the locking rod 7, record the reading m of the electronic crane scale 4, put the buoyancy material block into the counterweight basket 5, record the displayed number of the electronic crane scale 4, record it as m1, and then take out the buoyancy material block;

[0064] 3) After the liquid tank 6 is filled with water, the pressing rod 303 is pressed to immerse the weight basket 5 into the water of the liquid tank 6, and the reading m2 of the electronic crane scale 4 is recorded;

[0065] 4) Press the pressure rod 303 to make the weight basket 5 float to the surface of the water, put in the buoyancy material block, immerse the weight basket 5 below the water surface, and record the reading of the electronic crane scale 4, which is recorded as m3;

[0066] 5) Take out the buoyancy material block, etc., and the measurement is finished;

[0067] 6) Calculate the density of the buoyancy material according to the following formula.

[0068]

[0069] The above technical scheme has the following beneficial effects: by adding weights to the buoyancy material to be measured, the mass in the air and in water is measured respectively, and finally the density of the buoyancy material is obtained, thereby abandoning the previous scheme of measuring after the buoyancy material is coated on the shell, thereby improving the flexibility of measurement; there is no need to solidify the buoyancy material, thus saving the detection cost, not affecting the strength of the shell material, and improving the quality of the finished product; the density measurement of the density greater than water, less than water or equal to water can be realized, thereby improving universality.

[0070] The specific implementation methods of the above invention further illustrate the purpose, technical solutions and beneficial effects of the present invention. It should be understood that the above are only specific implementation methods of the present invention and are not used to limit the protection scope of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A density measuring device, characterized in that: include: Support frame, guide column, adjustment mechanism, hanging scale, counterweight basket and liquid tank; The guide column is fixed inside the support frame, with its top end fixed to the top plate of the support frame and its bottom end fixed to the bottom plate of the support frame; Inside the support frame, an adjustment mechanism, a hanging scale, a counterweight basket and a liquid tank are arranged in sequence from top to bottom in the vertical direction; The adjustment mechanism is movably connected to the guide column, and the bottom is sequentially connected to a hanging scale and a counterweight basket; The liquid containing tank is placed on the bottom plate of the supporting frame, and the top opening of the liquid containing tank can allow the counterweight basket to pass through; The regulating mechanism comprises: Adjust the frame, baffles, pressure rods, and elastic parts; The top of the adjustment frame is provided with a first opening, and the bottom is provided with a second opening, and the positions of the first opening and the second opening correspond to each other, and the guide column can pass through. The pressure rod penetrates from the outer side of the top plate of the adjustment frame and is movably connected to the adjustment frame; The blocking piece is obliquely arranged inside the adjusting frame, one end of which is fixed to the inner wall of the adjusting frame, and the other end is fixed to the end of the pressure rod penetrating into the adjusting frame; the blocking piece is provided with a through hole for clamping the guide column; The elastic member is arranged inside the adjusting frame and sleeved on the guide column, with one end of the elastic member abutting against the bottom surface of the blocking sheet and the other end abutting against the bottom plate of the adjusting frame.

2. The density measuring device according to claim 1, characterized in that: The elastic member is a spring.

3. The density measuring device according to claim 1, characterized in that: The counterweight basket is connected to the hanging scale via a locking rod.

4. The density measuring device according to claim 1, characterized in that: A counterweight is provided inside the counterweight basket; A movable door plate is provided on the surface of the counterweight basket.

5. The density measuring device according to claim 1, characterized in that: The vertical center line of the adjusting mechanism, the vertical center line of the hanging scale, the vertical center line of the counterweight basket and the vertical center line of the liquid containing tank are the same straight line.

6. A density measurement method, characterized in that: The density measuring device according to any one of claims 1 to 5 is used for measurement, comprising: Return the reading on the hanging scale to zero; Connecting the counterweight basket to the hanging scale, and recording the first indication m displayed by the hanging scale; Put the object to be measured into the counterweight basket, and record the second indication m1 displayed by the hanging scale; Take out the object to be measured, adjust the adjustment mechanism to immerse the weight basket completely into the liquid tank filled with water, and record the third reading m2 of the hanging scale; Adjust the adjustment mechanism so that the counterweight basket is completely above the water surface, put the object to be measured in the counterweight basket, adjust the adjustment mechanism so that the counterweight basket is completely immersed in the liquid tank filled with water, and record the fourth reading m3 of the hanging scale; The density of the object to be measured is calculated according to the first indication m, the second indication m1, the third indication m2 and the fourth indication m3.

7. The density measurement method according to claim 6, characterized in that: The density of the object to be measured is calculated according to the first indication m, the second indication m1, the third indication m2 and the fourth indication m3, by the following calculation formula:

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