Float-type densimeter and measuring method of float-type densimeter

Abstract

The invention discloses a float-type densimeter and a measuring method thereof, the float-type densimeter comprises a float main body, a float cover body and a counterweight assembly, the float main body is a cylinder, one end of the float main body is provided with a hollow cylinder with an opening, the outer side wall of the cylinder is provided with scale marks, the float cover body is hermetically connected with the opening end of the float main body, and the counterweight assembly is connected with the hollow cylinder. The diameter of the counterweight assembly is equal to the inner diameter d of the floater body, and the counterweight assembly is movably connected with the floater body. The metal floater has the advantages that the floater body is of a thin-wall hollow stainless steel structure, light-weight design of the metal floater is achieved, machining is facilitated, measurement stability is improved, the effective density of the floater body is reduced to the measurement range through the hollow structure, and a quantitative calculation formula of the wall thickness and density of the floater body is provided; the problem that a traditional trial and error method is low in efficiency is solved, fine adjustment of the gravity center of the floater body is achieved by increasing and decreasing the number of the balancing weights, and the metal floater type densimeter is compatible with strong corrosive liquid detection and can be expanded to chemical engineering, seawater desalination and other scenes.

Description

Technical Field

[0001] The present invention relates to the field of fire safety, in particular to a float-type density meter and a float-type density meter measurement method. Background Art

[0002] The density measurement of slurry in the limestone wet flue gas desulfurization absorption tower of a thermal power plant requires manual calibration. Glass vacuum float densitometers are commonly used for manual measurement calibration due to their ease of operation, low cost, and strong adaptability to measurement environments. However, due to their fragile material and limited shape, they cannot be reliably used in industrial on-site fixed installations during density measurement calibration. Plastic float densitometers have poor corrosion resistance and are easily deformed at high temperatures. Therefore, neither solution can meet the density measurement needs of industrial sites. Summary of the Invention

[0003] Therefore, the technical problem to be solved by the present invention is to solve the problem that the existing float material is fragile and to improve the corrosion resistance and durability.

[0004] The above technical problems are solved by the following technical solutions: The present invention proposes a float type density meter, which includes a float body, the float body is a cylindrical hollow cylinder with an opening at one end, and the outer wall of the cylinder is provided with scale lines.

[0005] A float cover body, the float cover body is sealed and connected to the open end of the float body,

[0006] A counterweight assembly, the diameter of which is equivalent to the inner diameter d of the float body, and is movably connected to the float body.

[0007] In a preferred embodiment of the float-type density meter of the present invention, the float body and the float cover are made of metal.

[0008] In a preferred embodiment of the float-type density meter of the present invention, the float body and the float cover are made of 304 or 316 stainless steel with a density of 7.9 g / cm 3 .

[0009] In a preferred embodiment of the float-type density meter of the present invention, a threaded groove is provided on the inner side wall of the float body close to the bottom.

[0010] In a preferred embodiment of the float-type density meter of the present invention, the counterweight assembly includes at least one counterweight block, and a thread is provided on a side wall of the counterweight block.

[0011] In a preferred embodiment of the float-type density meter of the present invention, the thread is threadedly connected to the thread groove.

[0012] A float-type density meter measurement method includes calculating the total volume V of the float 总 :

[0013] V 总 =π(D / 2) 2 H

[0014] Where D is the diameter of the float body, H is the height of the float body and the float cover when they are sealed and connected.

[0015] Calculate the float cavity volume V 内腔 :

[0016] V 内腔 =π(d / 2) 2 h

[0017] Wherein, d is the inner diameter of the float body, h is the inner height of the float body,

[0018] Calculate the volume V of the float metal shell 壳体 :

[0019] V 壳体 =V 总 -V 内腔

[0020] Among them, V 壳体 Related to metal materials,

[0021] Calculate the wall thickness of the float:

[0022] t=(Dd) / 2

[0023] Wherein, t is the wall thickness of the float body;

[0024] Calculate the effective density ρ of the float 有效 :

[0025] ρ 有效 =(ρ 金属 ×V 壳体 ) / V 总

[0026]

[0027] The ratio of the total volume of the counterweight, ρ 金属 The density of the float body, float cover and counterweight metal is 7.9g / cm 3 .

[0028] In a preferred embodiment of the float-type density meter measurement method of the present invention: center of gravity adjustment: add a counterweight block at the bottom of the float body to ensure vertical floating,

[0029] Surface marking: There is a scale mark on the top of the float body. When the float body is immersed in the calibration liquid and the surface is aligned with the scale mark, the density is 1110 kg / m 3 When the float body floats up to the liquid surface and is aligned with the scale line, the density is 1130kg / m 3 ,

[0030] Calibration fluid selection: Use a known density of 1110 kg / m 3 and 1130kg / m 3 The standard solution is saline or glycerol solution.

[0031] In a preferred embodiment of the float-type density meter measurement method of the present invention: sinking correction: adding a counterweight block to lower the center of gravity of the float body and reduce the height of the floating liquid surface;

[0032] Floating correction: reduce the counterweight, raise the center of gravity of the float body, and increase the height above the liquid surface;

[0033] This calibration protocol covers experimental design, procedures, data recording, and error analysis for density meters made of 304 or 316 stainless steel hollow floats, ensuring the meter's accuracy and reliability.

[0034] In a preferred embodiment of the float-type density meter measurement method of the present invention: verifying the matching of the effective density of the float body and the density of the target liquid;

[0035] Test the stability of the float body at different temperatures and liquid viscosities;

[0036] Quantify the measurement error of the density meter after calibration, with a target error of ≤±0.5%;

[0037] An adjustable counterweight slot is provided at the bottom of the float body to achieve fine-tuning of the vertical stability of the float body.

[0038] The beneficial effects of the present invention are as follows: the float body adopts a thin-walled hollow stainless steel structure to achieve a lightweight design of the metal float, facilitate processing and improve measurement stability. The float body reduces the effective density to the measurement range through the hollow structure, and proposes a quantitative calculation formula for the wall thickness and density of the float body, which solves the problem of low efficiency of the traditional trial and error method. By increasing or decreasing the number of counterweight blocks, the center of gravity of the float body can be fine-tuned. The metal float-type density meter is compatible with the detection of highly corrosive liquids and can be expanded to scenarios such as chemical industry and seawater desalination. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings of the embodiments of the present invention. Obviously, the drawings described below only relate to some embodiments of the present invention and are not intended to limit the present invention. Among them:

[0040] Figure 1 An exploded view of a float-type density meter is shown;

[0041] Figure 2 shows a side view of a float-type density meter;

[0042] Figure 3 Shows a cross-sectional view of the float body and the float cover;

[0043] Figure 4 A cross-sectional view of a float-type densitometer is shown. DETAILED DESCRIPTION

[0044] In order to enable those skilled in the art to better understand the present invention, the present invention is further described in detail below with reference to specific embodiments and the accompanying drawings.

[0045] The terms used in the present invention are those commonly used in the art in view of the functions of the present invention, but these terms may vary according to the intentions of those skilled in the art, precedents, or new technologies in the art. In addition, specific terms may be selected by the applicant, and in such cases, their detailed meanings will be described in the detailed description of the present invention. Therefore, the terms used in the specification should not be understood as simple names, but rather as the meanings of the terms and the overall description of the present invention.

[0046] Reference Figures 1 and 2 This embodiment provides a float-type density meter, including a float body 1, a float cover 2 and a counterweight assembly 3.

[0047] Preferably, the float body 1 is a cylinder with an open hollow cylinder at one end. The float body 1 is a thin-walled hollow cylinder with a simple structure, which is easy to process and can remain stable in the calibration liquid. Scale lines are provided on the outer wall of the cylinder. The float cover 2 is sealed with the open end of the float body 1 to prevent the calibration liquid from entering the interior of the float body 1. The diameter of the counterweight assembly 3 is equivalent to the inner diameter d of the float body 1 and is detachably connected to the float body 1. The counterweight assembly 3 can adjust the center of gravity of the float body 1 and can adjust the density.

[0048] Reference Figures 1 to 4 As an optional embodiment, the float body 1 and the float cover 2 are made of metal. The use of metal can avoid the problem that the float-type density meter made of glass is fragile and easy to damage.

[0049] Furthermore, the float body 1 and the float cover 2 are made of 304 or 316 stainless steel with a density of 7.9 g / cm 3The material is 304 or 316 stainless steel with strong corrosion resistance, suitable for acid, alkali, salt and other liquids. The overall density can be adjusted to the target liquid range, such as 0.8 ~ 1.5g / cm 3 The effective density of the float body 1 and the float cover 2 can be adjusted in the range of 800 to 1500 kg / m 3 The same design logic can be used for the outer diameters of the float body 1 and the float cover 2 ranging from 20 to 50 mm.

[0050] Preferably, a counterweight groove 11 is provided on the inner side wall near the bottom of the float body 1. The counterweight groove 11 facilitates the positioning of the counterweight assembly 3 to make the float body 1 more stable. In this embodiment, the counterweight groove 11 has a depth of 2 to 5 mm and a width of 3 to 8 mm.

[0051] Preferably, the counterweight assembly 3 includes at least one counterweight block 31 , a thread 311 is provided on the side wall of the counterweight block 31 , the number of counterweight blocks 31 can be increased or decreased inside the float body 1 , and 1 to 5 counterweight blocks 31 are provided, each weighing 1 to 5 g.

[0052] Furthermore, the thread 311 is threadedly connected to the counterweight groove 11, and when putting in or taking out, the counterweight block 31 can be fixed by dripping glue on the metal rod and then rotating it to put in or take out.

[0053] During use, a counterweight 31 is placed in the float body 1 and is sealed to the float body 1 through the float cover 2. This prevents the liquid from entering the float body 1 when the float-type densitometer is placed in the calibration liquid. The float body 1 is a thin-walled hollow cylinder with a simple structure, which is easy to process and can remain stable in the calibration liquid. Scale lines are set on the outer wall of the cylinder of the float body 1. The float body 1 and the float cover 2 are made of 304 or 316 stainless steel, which has strong corrosion resistance and is suitable for various liquids such as acids, alkalis, and salts.

[0054] Reference Figures 1 to 4 This embodiment is based on the previous embodiment, and differs from the previous embodiment in that:

[0055] Measurement methods include:

[0056] Calculate the total volume V of the float 总 :

[0057] V 总 =π(D / 2) 2 H

[0058] Wherein, D is the diameter of the float body 1, H is the height of the float body 1 and the float cover 2 in the sealed connection state, that is, the total height from the top surface of the float cover 2 to the bottom surface of the float body 1 when the float body 1 and the float cover 2 are sealed.

[0059] Calculate the float cavity volume V内腔 :

[0060] V 内腔 =π(d / 2) 2 h

[0061] Wherein, d is the inner diameter of the float body 1, h is the inner height of the float body 1,

[0062] Calculate the volume V of the float metal shell 壳体 :

[0063] V 壳体 =V 总 -V 内腔

[0064] Among them, V 壳体 Regarding the metal material, 304 or 316 stainless steel is used in this embodiment.

[0065] Calculate the wall thickness of the float:

[0066] t=(Dd) / 2

[0067] Wherein, t is the wall thickness of the float body 1;

[0068] Calculate the effective density ρ of the float 有效 :

[0069] ρ 有效 =(ρ 金属 ×V 壳体 ) / V 总

[0070]

[0071] The ratio of the total volume of the sub-cover 2 and the counterweight 3, ρ 金属 The density of the metal of the float body 1, float cover 2 and counterweight 3 is 7.9g / cm 3 .

[0072] Preferably, the center of gravity is adjusted by adding a counterweight 31 at the bottom of the float body 1 to ensure vertical floating.

[0073] Surface marking: There is a scale mark on the top of the float body 1. When the float body 1 is immersed in the calibration liquid and the liquid level is aligned with the scale mark, the density is 1110 kg / m 3 When the float body 1 floats on the liquid surface and aligns with the scale line, the density is 1130kg / m 3 ,

[0074] Calibration fluid selection: Use a known density of 1110 kg / m 3 and 1130kg / m 3 The standard solution is saline or glycerol solution.

[0075] Furthermore, the sinking correction is as follows: a counterweight 31 is added to lower the center of gravity of the float body 1 and reduce the height above the liquid surface;

[0076] Floating correction: reduce the counterweight 31, raise the center of gravity of the float body 1, and increase the height of the float above the liquid surface;

[0077] This calibration protocol covers experimental design, procedures, data recording, and error analysis for density meters made of 304 or 316 stainless steel hollow floats, ensuring the meter's accuracy and reliability.

[0078] Furthermore, the effective density of the float body 1 is verified to be consistent with the target liquid density of 1110 kg / m 3 Matching;

[0079] Testing the stability of the float body 1 at different temperatures and liquid viscosities;

[0080] Quantify the measurement error of the density meter after calibration, with a target error of ≤±0.5%;

[0081] An adjustable counterweight groove 11 is provided at the bottom of the float body 1 to achieve fine adjustment of the vertical stability of the float body 1.

[0082] Furthermore, the calculation may be performed in combination with a temperature sensor and a density correction algorithm. The temperature sensor is a prior art and is not specifically limited in this embodiment.

[0083] Finally, it should be pointed out that the methods and devices described in detail above are merely embodiments, and those skilled in the art can modify these embodiments in different ways without departing from the scope of the present invention.

Claims

1. A float-type density meter, characterized in that: include, The float body (1) is a cylindrical hollow cylinder with an opening at one end, and a scale line is provided on the outer wall of the cylinder. A float cover (2), the float cover (2) being sealed and connected to the open end of the float body (1), A counterweight assembly (3) has a diameter equivalent to the inner diameter d of the float body (1) and is movably connected to the float body (1).

2. The float-type density meter according to claim 1, characterized in that: The float body (1) and the float cover (2) are made of metal.

3. The float-type density meter according to claim 1, characterized in that: The float body (1) and the float cover (2) are made of 304 or 316 stainless steel, with a density of 7.9 g / cm 3 .

4. The float-type density meter according to claim 3, characterized in that: The float body (1) is provided with a counterweight groove (11) on the inner side wall close to the bottom.

5. The float-type density meter according to claim 4, characterized in that: The counterweight assembly (3) comprises at least one counterweight block (31), and a thread (311) is provided on a side wall of the counterweight block (31).

6. The float-type density meter according to claim 5, characterized in that: The thread (311) is threadably connected to the counterweight groove (11).

7. A float-type density meter measurement method, characterized in that: Based on the float-type density meter according to any one of claims 1 to 6, the method comprises: Calculate the total volume V of the float 总 : V 总 =π(D / 2) 2 H Wherein, D is the diameter of the float body (1), H is the height of the float body (1) and the float cover (2) in a sealed connection state, Calculate the float cavity volume V 内腔 : V 内腔 =π(d / 2) 2 h Wherein, d is the inner cavity diameter of the float body (1), h is the inner cavity height of the float body (1), Calculate the volume V of the float metal shell 壳体 : V 壳体 =V 总 -V 内腔 Among them, V 壳体 Related to metal materials, Calculate the wall thickness of the float: t=(Dd) / 2 Wherein, t is the wall thickness of the float body (1); Calculate the effective density ρ of the float 有效 : r 有效 =(ρ 金属 ×V 壳体 ) / V 总 Among them, ρ 有效 is the ratio of the mass of the float body (1), the float cover (2) and the counterweight assembly (3) to the total volume of the float body (1), the float cover (2) and the counterweight assembly (3), ρ 金属 The density of the metal of the float body (1), the float cover (2) and the counterweight assembly (3) is 7.9 g / cm 3 .

8. The float-type density meter measurement method according to claim 7, characterized in that: Center of gravity adjustment: add a counterweight (31) to the bottom of the float body (1) to ensure vertical floating. Surface marking: The scale mark on the top of the float body (1) is marked. When the float body (1) is immersed in the calibration liquid and the surface is aligned with the scale mark, the density is 1110 kg / m 3 When the float body (1) floats on the liquid surface and aligns with the scale line, the density is 1130 kg / m 3 , Calibration fluid selection: Use a known density of 1110 kg / m 3 and 1130kg / m 3 The standard solution is saline or glycerol solution.

9. The float-type density meter measurement method according to claim 8, characterized in that: Sinking correction: add a counterweight (31) to lower the center of gravity of the float body (1) and reduce the height above the liquid surface; Floating correction: reduce the counterweight (31), raise the center of gravity of the float body (1), and increase the height above the liquid surface; This calibration protocol covers experimental design, procedures, data recording, and error analysis for density meters made of 304 or 316 stainless steel hollow floats, ensuring the meter's accuracy and reliability.

10. The float-type density meter measurement method according to claim 9, characterized in that: Verify the effective density of the float body (1) and the target liquid density (1110kg / m 3 )’s matching; Testing the stability of the float body (1) at different temperatures and liquid viscosities; Quantify the measurement error of the density meter after calibration, with a target error of ≤±0.5%; An adjustable counterweight groove (11) is provided at the bottom of the float body (1) to achieve fine adjustment of the vertical stability of the float body (1).

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