Density detection device

Abstract

The utility model discloses a density detection device which comprises a detection tank, a water inlet pipe, a water outlet pipe, a differential pressure densimeter and an overflow pipe, the detection tank is provided with a detection cavity, a water inlet, an overflow port and a water outlet; the water inlet pipe communicates with the water inlet; the water outlet pipe communicates with the water outlet; the differential pressure densimeter is inserted into the detection cavity and comprises two probes; one end of the overflow pipe is communicated with the overflow port, and the other end of the overflow pipe extends upwards and is bent, so that the highest point is higher than the water outlet. According to the utility model, the detection tank is provided with the overflow port, and the highest point of the overflow pipe communicated with the overflow port is higher than the water outlet, so that when the flow rate of liquid to be detected fed into the detection tank by the water inlet pipe changes, the flow rate can be absorbed through overflow of the overflow pipe, and the flow rate of the liquid in the detection tank is stable in the measurement process; and the two probes of the differential pressure type densimeter can capture the real average pressure difference. The whole structure is simple, operation is easy and convenient, and cost is low.

Description

Technical Field

[0001] This utility model relates to the field of detection device technology, and in particular to a density detection device. Background Technology

[0002] The core principles of differential pressure density meters (such as Bernoulli's equation and Hagen-Poiseuille's law) are all based on the assumption of steady flow, meaning that fluid parameters such as velocity and pressure do not change over time. If the flow is unstable (e.g., pulsating, turbulent, or sudden velocity changes), it will cause fluctuations in the pressure difference between two points, directly interfering with the density calculation results. The signal acquisition of differential pressure sensors typically requires a certain amount of time (e.g., integration time or filtering period). When the flow is unstable (e.g., turbulent, pulsating, or velocity changes exist), the sensor may fail to capture the true average pressure difference, leading to instantaneous errors or long-term drift, ultimately resulting in unreliable density calculation results.

[0003] Traditional flow rate control mechanisms are relatively complex. For example, they may involve adding buffer tanks or pulsation dampers (such as bladder accumulators) to absorb pressure pulsations caused by pump or valve movements; or installing rectifiers (such as honeycomb guide vanes) in the pipeline to convert turbulent flow into laminar flow. Therefore, all of these flow rate control mechanisms suffer from structural complexity, inconvenient operation, and high cost.

[0004] Therefore, it is necessary to provide a density detection device to overcome the above-mentioned defects. Utility Model Content

[0005] The purpose of this invention is to provide a density detection device that addresses the problems of complex structure, inconvenient operation, and high cost associated with traditional flow rate control mechanisms. By adding an overflow pipe, the flow rate of the liquid can be kept stable during the measurement process.

[0006] To achieve the above objectives, this utility model provides a density detection device, comprising:

[0007] The testing tank has a testing chamber, and has an inlet and an overflow outlet at the bottom, and an outlet at the top;

[0008] A water inlet pipe, which is connected to the water inlet;

[0009] A water outlet pipe, which is connected to the water outlet;

[0010] A differential pressure density meter is inserted into the detection chamber and includes two probes, both of which are located between the inlet and the outlet.

[0011] An overflow pipe, one end of which is connected to the overflow port, and the other end extends upward and bends so that its highest point is higher than the outlet.

[0012] In a preferred embodiment, the testing tank includes a cylindrical tank body, a conical head located below the tank body, and an upper cover located above the tank body; the water inlet and the overflow outlet are both located on the conical head, and the water outlet is located on the tank body.

[0013] In a preferred embodiment, the bottom of the tank is provided with a plurality of support rods, all of which are used to jointly support the testing tank and to suspend the conical head in the air.

[0014] In a preferred embodiment, each of the support rods is provided with a fixing pad at its bottom, and the fixing pad is perpendicular to the support rod.

[0015] In a preferred embodiment, the bottom of the conical head is provided with a drain outlet, which is connected to a drain pipe.

[0016] In a preferred embodiment, a clean water inlet is provided on the upper side of the tank, and the clean water inlet is connected to a clean water pipe.

[0017] In a preferred embodiment, the inlet and the overflow are arranged opposite each other, and their central axes are on the same straight line.

[0018] In a preferred embodiment, the top of the tank is provided with a pair of parallel and spaced horizontal bars; the differential pressure density meter includes a fixed rod and a fixing plate vertically disposed on the fixed rod; both probes are disposed on the fixed rod; the fixing plate is mounted on the pair of horizontal bars, and the fixed rod passes through the pair of horizontal bars and extends into the detection chamber; the top cover is used to fix the fixing plate from the side.

[0019] In a preferred embodiment, the top cover includes two semi-circular pieces, and an arc-shaped limiting block is provided at a preset position at the bottom of the semi-circular pieces. The limiting block is adapted to abut against the inner wall of the tank. Both semi-circular pieces have clearance grooves on their sides that are close to each other. The inner walls of the two clearance grooves surround the side of the fixing piece to limit and fix the position of the differential pressure density meter.

[0020] In a preferred embodiment, the clean water inlet is equipped with a clean water inlet solenoid valve, and the drain outlet is equipped with a drain outlet solenoid valve.

[0021] The density detection device provided by this utility model has an overflow port in the detection tank, and the highest point of the overflow pipe connected to the overflow port is higher than the outlet. Therefore, when the flow rate of the liquid to be measured in the detection tank changes, the overflow from the overflow pipe absorbs the change, ensuring a stable flow rate of the liquid in the detection tank during the measurement process. This is beneficial for the two probes of the differential pressure density meter to capture the true average pressure difference. The overall structure is simple, easy to operate, and low in cost. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 A perspective view of the density detection device provided by this utility model;

[0024] Figure 2 for Figure 1 A three-dimensional view of the density detection device from another angle;

[0025] Figure 3 for Figure 1 An exploded perspective view of the density detection device shown.

[0026] Figure 4 for Figure 1 A longitudinal half-section view of the density detection device shown.

[0027] The diagram is labeled as follows: 100, density testing device; 10, testing tank; 101, testing chamber; 102, water inlet; 103, overflow outlet; 104, water outlet; 105, drain outlet; 106, clean water outlet; 11, tank body; 12, conical head; 13, top cover; 131, semi-circular plate; 132, limiting block; 133, clearance groove; 134, handle; 14, support rod; 15, fixing shim; 16, horizontal bar.

[0028] 20. Inlet pipe; 30. Outlet pipe; 40. Differential pressure density meter; 41. Probe; 42. Fixing rod; 43. Fixing plate; 50. Overflow pipe; 60. Drain pipe; 61. Drain outlet solenoid valve; 70. Clean water pipe; 71. Clean water outlet solenoid valve. Detailed Implementation

[0029] To make the objectives, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described in this specification are merely for explaining the present utility model and are not intended to limit the present utility model.

[0030] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0031] It should also be further understood that the term "and / or" as used in this specification and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0032] In an embodiment of this utility model, a density detection device 100 is provided for calculating liquid density through the relationship between static pressure difference and height difference. Wherein, liquid density ρ = ΔP / (gΔh), ΔP is the pressure difference between two sensor probes, Δh is the vertical height difference between the two probes, and g is the acceleration due to gravity.

[0033] like Figures 1-4 As shown, the density detection device 100 includes: a detection tank 10, an inlet pipe 20, an outlet pipe 30, a differential pressure density meter 40, and an overflow pipe 50.

[0034] The detection tank 10 has a detection chamber 101 for containing the liquid to be tested. The bottom of the detection tank 10 has an inlet 102, an overflow port 103, and an outlet 104 that are respectively connected to the detection chamber 101.

[0035] A differential pressure density meter 40 is inserted into the detection chamber 101 and includes two pressure sensor probes 41, both of which are located between the inlet 102 and the outlet 104. It should be noted that the specific structure of the differential pressure density meter 40 can be found in existing technology, and will not be described in detail here.

[0036] The inlet pipe 20 is connected to the inlet 102, and the outlet pipe 30 is connected to the outlet 104. The liquid to be tested enters the detection chamber 101 from the inlet pipe 20 at the bottom of the detection tank 10. Then the liquid slowly rises until it submerges the two probes 41, and then flows out from the outlet pipe 30 at the top, making the liquid flow in the detection chamber 101 closer to steady flow.

[0037] Specifically, the testing tank 10 includes a cylindrical tank body 11, a conical head 12 located below the tank body 11, and a top cover 13 located above the tank body 11. The top cover 13 can close or open the top of the tank body 11. The inlet 102 and the overflow 103 are both located on the conical head 12, and the outlet 104 is located on the tank body 11.

[0038] One end of the overflow pipe 50 is connected to the overflow port 103, while the other end extends upward and bends, forming a communicating vessel structure. Specifically, the end of the overflow pipe 50 furthest from the overflow port 103 first bends, then extends vertically upward, and then bends horizontally or downward, ensuring that the highest point the liquid in the overflow pipe 50 can reach is higher than the outlet 104. When the water inlet speed of the inlet pipe 20 is too fast, the liquid level in the detection chamber 101 rises and then flows out through the overflow pipe 50, thus enabling the overflow pipe 50 to absorb the flow rate fluctuations of the inlet pipe 20.

[0039] In this embodiment, the inlet 102 and the overflow 103 are arranged opposite to each other, and their central axes are on the same straight line. This allows the liquid to be tested entering from the inlet 102 to first flow into the overflow 103, thus avoiding turbulence in the liquid in the detection chamber 101.

[0040] Furthermore, a drain port 105 is provided at the bottom of the conical head 12, and the drain port 105 is connected to a drain pipe 60. The drain port 105 is equipped with a drain port solenoid valve 61. The drain pipe 60 is used to drain the liquid in the detection chamber 101 for the next measurement. A clean water inlet 106 is provided on the upper side of the tank body 11, and the clean water inlet 106 is connected to a clean water pipe 70. The clean water inlet 106 is equipped with a clean water inlet solenoid valve 71. The clean water pipe 70 is used to inject clean water into the detection chamber 101, thereby cleaning the inside of the tank body 11 and avoiding cross-contamination of the test liquid in the tank body 11.

[0041] In some embodiments, the bottom of the tank 11 is provided with a plurality of support rods 14. In this embodiment, there are four support rods 14, which together form a rectangle. All support rods 14 are used to jointly support the detection tank 10 and to suspend the conical head 12 in the air to facilitate the subsequent discharge of liquid from the tank 11.

[0042] Furthermore, each support rod 14 is provided with a fixing pad 15 at its bottom. The fixing pad 15 is perpendicular to the support rod 14 and is used to increase the support area between the support rod 14 and the ground, thereby improving the stability of the test tank 10.

[0043] In some embodiments, combined with Figure 3As shown, the top of the tank 11 is provided with a pair of parallel, spaced-apart horizontal rods 16. The differential pressure density meter 40 also includes a fixed rod 42 and a fixed plate 43 vertically disposed on the fixed rod 42. In this embodiment, the fixed plate 43 is circular. Both sensor probes 41 are disposed on the fixed rod 42 and are spaced apart vertically. The fixed plate 43 is mounted on the pair of horizontal rods 16, and the fixed rod 42 extends into the detection chamber 101 through the space between the pair of horizontal rods 16. That is, the pair of horizontal rods 16 support the fixed plate 43, thereby positioning the vertical position of the fixed rod 42.

[0044] The top cover 13 is used to fix the fixing piece 43 from the side. Specifically, the top cover 13 includes two semi-circular pieces 131. An arc-shaped limiting block 132 is provided at a predetermined position at the bottom of each semi-circular piece 131. The limiting block 132 fits against the top of the inner wall of the tank 11, thereby preventing the semi-circular pieces 131 from falling outward from the top of the tank 11. Both semi-circular pieces 131 have clearance grooves 133 on their adjacent sides. The inner walls of the two clearance grooves 133 together surround the side of the fixing piece 43 to limit and fix the position of the differential pressure density meter 40 in the horizontal direction. At least one handle 134 is provided at the top of each semi-circular piece 131 for easy lifting.

[0045] In summary, the density detection device 100 provided by this utility model, by opening an overflow port 103 in the detection tank 10 and ensuring that the highest point of the overflow pipe 50 connected to the overflow port 103 is higher than the outlet 104, can absorb changes in the flow rate of the liquid to be tested sent into the detection tank 10 by the inlet pipe 20 through the overflow of the overflow pipe 50. This ensures that the flow rate of the liquid in the detection tank 10 remains stable during the measurement process, which is beneficial for the two probes 41 of the differential pressure density meter 40 to capture the true average pressure difference. The overall structure is simple, the operation is convenient, and the cost is low.

[0046] This invention is not limited to the description in the specification and embodiments. Therefore, other advantages and modifications can be readily realized by those skilled in the art. Thus, without departing from the spirit and scope of the general concept as defined by the claims and their equivalents, this invention is not limited to the specific details, representative devices and illustrated examples shown and described herein.

Claims

1. A density detection device, characterized in that, include: The testing tank has a testing chamber, and has an inlet and an overflow outlet at the bottom, and an outlet at the top; A water inlet pipe, which is connected to the water inlet; A water outlet pipe, which is connected to the water outlet; A differential pressure density meter is inserted into the detection chamber and includes two probes, both of which are located between the inlet and the outlet. An overflow pipe, one end of which is connected to the overflow port, and the other end extends upward and bends so that its highest point is higher than the outlet.

2. The density detection device as described in claim 1, characterized in that, The testing tank includes a cylindrical tank body, a conical head located below the tank body, and an upper cover located above the tank body; the water inlet and the overflow outlet are both located on the conical head, and the water outlet is located on the tank body.

3. The density detection device as described in claim 2, characterized in that, The bottom of the tank is provided with several support rods, all of which are used to support the testing tank together and to suspend the conical head in the air.

4. The density detection device as described in claim 3, characterized in that, Each support rod has a fixing pad at its bottom, and the fixing pad is perpendicular to the support rod.

5. The density detection device as described in claim 2, characterized in that, The bottom of the conical head is provided with a drain outlet, which is connected to a drain pipe.

6. The density detection device as described in claim 5, characterized in that, A clean water inlet is provided on the upper side of the tank, and the clean water inlet is connected to a clean water pipe.

7. The density detection device as described in claim 2, characterized in that, The inlet and the overflow are positioned opposite each other, and their central axes are on the same straight line.

8. The density detection device as described in claim 2, characterized in that, The top of the tank is provided with a pair of parallel and spaced horizontal bars; the differential pressure density meter includes a fixed rod and a fixing plate vertically mounted on the fixed rod; both probes are mounted on the fixed rod; the fixing plate is mounted on the pair of horizontal bars, and the fixed rod passes between the pair of horizontal bars and extends into the detection chamber; the top cover is used to fix the fixing plate from the side.

9. The density detection device as described in claim 8, characterized in that, The top cover includes two semi-circular pieces, and an arc-shaped limiting block is provided at a preset position at the bottom of the semi-circular pieces. The limiting block is adapted to abut against the inner wall of the tank. Both semi-circular pieces have a relief groove on the side that is close to each other. The inner walls of the two relief grooves surround the side of the fixing piece to limit and fix the position of the differential pressure density meter.

10. The density detection device as described in claim 6, characterized in that, The clean water inlet is equipped with a clean water inlet solenoid valve, and the drain outlet is equipped with a drain outlet solenoid valve.

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