Maintenance-free differential pressure type liquid density detection device

Abstract

The utility model discloses a maintenance-free differential pressure type liquid density detection device which comprises a tank body, a plurality of measuring short sections which are arranged in parallel and are respectively communicated with the inside of the tank body are arranged on the outer wall of the tank body, and each measuring short section is connected to a flushing mechanism through a pipeline; each measuring nipple is obliquely arranged upwards from the joint of the measuring nipple and the outer wall of the tank body, the end part of each measuring nipple is connected with a root valve through a flange, the root valves are connected with single-flange pressure transmitters, the single-flange pressure transmitters are electrically connected to a density display meter through signal lines, and the density display meter is electrically connected with a control mechanism. By arranging the structures such as the measuring short section and the flushing mechanism, the accurate measuring effect is ensured, meanwhile, installation is convenient and rapid, and later maintenance is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of measuring instruments, in particular to a maintenance-free differential pressure liquid density detection device. Background Art

[0002] At present, in chemical production, tuning fork densitometers or differential pressure densitometers are usually used to perform online detection of the density of the medium in the liquid tank. However, when the concentration of the measured medium is high and easy to crystallize, the two tuning forks of the traditional tuning fork densitometer are prone to scarring, resulting in inaccurate measurement results. The capillary pressure pipes connecting the positive and negative pressure chambers of the traditional differential pressure densitometer are also prone to being blocked by crystals after long-term use, resulting in unstable measurement values ​​and serious inaccuracy. Utility Model Content

[0003] In view of the above-mentioned shortcomings of the prior art, the technical problem to be solved by the utility model is to provide a maintenance-free differential pressure liquid density detection device, which ensures accurate measurement results and is easy and quick to install, avoiding subsequent maintenance.

[0004] In order to solve the above technical problems, the utility model includes a tank body, and its structural feature is that a plurality of measuring short sections arranged in parallel and respectively connected to the inside of the tank body are arranged on the outer wall of the tank body, and each of the measuring short sections is connected to the flushing mechanism through a pipeline; each of the measuring short sections is arranged obliquely upward from the connection with the outer wall of the tank body, and the end is connected to a root valve through a flange, and the root valve is connected to a single-flange pressure transmitter, and the plurality of single-flange pressure transmitters are electrically connected to a density display meter through a signal line, and the density display meter is electrically connected to a control mechanism.

[0005] After adopting the above structure, by setting a plurality of measuring short sections with different heights on the outer wall of the measuring tank, the pressure values ​​of different liquid levels transmitted by each single flange pressure transmitter are collected through the density display table, and then the density of the liquid in the tank is calculated using a preset formula to ensure accurate measurement results; by setting the measuring structure outside the tank, installation is convenient and fast, and measurement is also convenient; by setting the flushing mechanism, the measuring short section is flushed in time when the measurement is inaccurate, and crystals can be flushed away in time, avoiding later maintenance. The utility model can obtain accurate measurement results and is convenient and fast to install, avoiding later maintenance.

[0006] Preferably, the flushing mechanism comprises a flushing pipeline connected to the measuring nipple, the flushing pipeline is connected to a water tank, and a flushing water valve is installed on the flushing pipeline.

[0007] Preferably, the angle between the measuring nipple and the outer wall of the tank body is set to 45°-80°.

[0008] Preferably, the plurality of measuring short sections are arranged on the same side of the tank body and on the same vertical line.

[0009] Preferably, the number of the measuring short sections is set to two, including an upper measuring short section arranged on the upper part of the outer wall of the tank body and a lower measuring short section arranged on the lower part of the outside of the tank body. The upper measuring short section and the lower measuring short section are arranged in parallel and located on the same vertical line. The upper measuring short section and the lower measuring short section are respectively connected to the interior of the tank body.

[0010] Preferably, the upper measuring short section is arranged obliquely upward from the connection with the outer wall of the tank body, and the end is connected to the upper root valve through a flange, the upper root valve is connected to the upper single flange pressure transmitter, and the upper single flange pressure transmitter is electrically connected to the density display meter through a signal line.

[0011] Preferably, the lower measuring short section is arranged obliquely upward from the connection with the outer wall of the tank body, and the end is connected to the lower root valve through a flange, the upper root valve is connected to the lower single flange pressure transmitter, and the lower single flange pressure transmitter is electrically connected to the density display meter through a signal line.

[0012] The utility model can respectively measure the liquid surface pressure values ​​at the upper and lower parts of the tank body and input them into the density display table by means of the upper measuring short section and the lower measuring short section and other structures arranged at the upper and lower parts of the tank body, and calculate the density of the measured liquid by the formula, thereby ensuring the accuracy of the density value; by arranging the flushing mechanism, when there is an error in the measurement, the upper flushing water valve and the lower flushing water valve are opened, and water from the water tank enters the upper measuring short section and the lower measuring short section along the upper flushing pipeline and the lower flushing pipeline respectively, and the crystals are flushed away, and the processing is fast, thereby avoiding later maintenance. The utility model ensures an accurate measurement effect, and at the same time is convenient and quick to install, thereby avoiding later maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The drawings that constitute part of this application are used to provide a further understanding of this application, so that other features, purposes and advantages of this application become more obvious. The schematic embodiment drawings and their descriptions of this application are used to explain this application and do not constitute an improper limitation on this application. In the drawings:

[0014] Figure 1 It is a schematic diagram of the structure of the utility model;

[0015] Figure 2 The utility model is a schematic structural diagram of an embodiment.

[0016] In the figure: 1-tank body, 2-measuring short section, 3-root valve, 4-single flange pressure transmitter, 5-density display meter, 6-flushing mechanism, 601-flushing pipeline, 602-flushing water valve, 701-upper measuring short section, 702-upper root valve, 703-upper single flange pressure transmitter, 704-upper flushing pipeline, 705-upper flushing water valve, 801-lower measuring short section, 802-lower root valve, 803-lower single flange pressure transmitter, 804-lower flushing pipeline, 805-lower flushing water valve. DETAILED DESCRIPTION

[0017] In order to make the technical personnel in this field better understand the present application scheme, the following will be combined with the attached Figure 1-2 , a clear and complete description of the technical solutions in the embodiments of the utility model is given.

[0018] At present, when the commonly used tuning fork density meter or differential pressure density meter performs online detection of the density of the medium in the liquid tank, it is easy to have inaccurate measurement values. In order to solve the above problems, a maintenance-free differential pressure liquid density detection device is provided, including a tank body, and a plurality of parallel measuring short sections are arranged on the outer wall of the tank body and are respectively connected to the inside of the tank body, and the measuring short sections are connected to the flushing mechanism through pipelines; each measuring short section is respectively arranged upwardly from the connection with the outer wall of the tank body, and the end is connected to a root valve through a flange, and the root valve is connected to a single flange pressure transmitter, and multiple single flange pressure transmitters are respectively electrically connected to the density display table through signal lines, and the density display table is electrically connected to a control mechanism. Through the arrangement of the above structure, by arranging a plurality of measuring short sections with different heights on the outer wall of the measuring tank, the pressure values ​​of different liquid levels transmitted by each single flange pressure transmitter are collected through the density display table, and then the density of the liquid in the tank is calculated using a preset formula to ensure accurate measurement results; by arranging the measuring structure outside the tank, installation is convenient and fast, and measurement is convenient at the same time; by setting the flushing mechanism, the measuring short section is flushed in time when the measurement is inaccurate, and crystals can be flushed away in time, avoiding later maintenance. The utility model can obtain accurate measurement results and is convenient and fast to install, avoiding later maintenance.

[0019] An embodiment is now used to describe the above scheme in detail. For the convenience of description, Figure 2 The upper middle part is set as the upper part, and the lower part is set as the lower part.

[0020] A maintenance-free differential pressure liquid density detection device comprises a tank body 1, on the outer wall of the tank body 1 are arranged a plurality of parallel measuring nipples 2 respectively connected to the inside of the tank body 1, each measuring nipple 2 is connected to a flushing mechanism 6 through a pipeline; each measuring nipple 2 is arranged obliquely upward from the connection with the outer wall of the tank body 1, and the end is connected to a root valve 3 through a flange, the root valve 3 is connected to a single flange pressure transmitter 4, and a plurality of single flange pressure transmitters 4 are respectively electrically connected to a density display table 5 through a signal line, and the density display table 5 is electrically connected to a control mechanism, and the control mechanism adopts a DCS system. Among them, a flushing mechanism 6 is also arranged on the measuring nipple 2, and the flushing mechanism 6 includes a flushing pipeline 601 connected to the measuring nipple 2, the flushing pipeline 601 is connected to a water tank, and a flushing water valve 602 is installed on the flushing pipeline 601; the flushing mechanism 6 is arranged, when it is found that the measurement result has an error later, the flushing water valve 602 can be opened to flush away the crystals with water, the treatment is fast, and the later maintenance is avoided. In addition, the angle between the measuring nipple 2 and the outer wall of the tank body 1 is set to 45°-80°, and multiple measuring nipples 2 are arranged on the same side of the tank body 1 and on the same vertical line, so that the medium inside the tank body 1 can be discharged smoothly when the tank body 1 is out of use. Among them, the above-mentioned tank body 1 is a non-fixed component. The purpose of using this statement is to be able to explain this solution more vividly and specifically. When using this solution, the tank body 1 can be various types of liquid tanks according to the specific conditions on site.

[0021] Preferably, the number of measuring pup sections 2 is set to two, including an upper measuring pup section 701 arranged on the upper part of the outer wall of the tank body 1 and a lower measuring pup section 801 arranged on the lower part of the outside of the tank body 1. The upper measuring pup section 701 and the lower measuring pup section 801 are both fixedly connected to the outer wall of the tank body 1. Preferably, they are welded to the outer wall of the tank body 1, and it is ensured that the upper measuring pup section 701 and the lower measuring pup section 801 are arranged in parallel and located on the same vertical line. The upper measuring pup section 701 and the lower measuring pup section 801 are respectively connected to the interior of the tank body 1. The upper measuring nipple 701 is arranged obliquely upward from the connection with the outer wall of the tank body 1, and the end is connected to the upper root valve 702 through a flange, ensuring that the angle between the upper measuring nipple 701 and the outer wall of the tank body 1 is set to 45°-80°, preferably 80°, so that the medium therein can be discharged smoothly when the tank body 1 is out of use. The upper root valve 702 is firmly connected to the upper single flange pressure transmitter 703 through the flange with fastening bolts, and the upper single flange pressure transmitter 703 is electrically connected to the density display meter 5 through a signal line. The lower measuring nipple 801 is respectively arranged upwardly from the connection with the outer wall of the tank body 1, and the end is connected with the lower root valve 802 through a flange, ensuring that the angle between the lower measuring nipple 801 and the outer wall of the tank body 1 is set to 45°-80°, preferably 80°, so that the medium in the tank body 1 can be discharged smoothly when the tank body 1 is out of use. The lower root valve 802 is firmly connected to the lower single flange pressure transmitter 803 through the flange with a fastening bolt, and the lower single flange pressure transmitter 803 is electrically connected to the density display table 5 through a signal line. The upper measuring nipple 701 is also connected to the upper flushing pipeline 704, and the upper flushing water valve 705 is installed on the upper flushing pipeline 704. The lower measuring nipple 801 is connected to the lower flushing pipeline 804, and the lower flushing water valve 805 is installed on the lower flushing pipeline 804. The upper flushing pipeline 704 and the lower flushing pipeline 804 are connected to the water tank. When it is found later that the measurement results have errors, the upper flushing water valve 705 and the lower flushing water valve 805 can be opened, and water from the water tank enters the upper measuring short section 701 and the lower measuring short section 801 along the upper flushing pipeline 704 and the lower flushing pipeline 804 respectively, to flush away the crystals. The processing is quick and avoids later maintenance. It needs to be further explained here that for larger oil tanks, if the smaller crystals in the measuring short section 2 are flushed into the tank body 1, it can be ignored and will not affect the oil quality in the tank body 1.

[0022] When in use, first, install the density display meter 5 in the instrument protection box, and use the signal line to connect the signals of the upper single flange pressure transmitter 703 and the lower single flange pressure transmitter 803 to the first and second signal input terminals of the density display meter 5 respectively, and then connect the signal output terminal of the density display meter 5 to the control mechanism (i.e., DCS system) through the signal line. After checking that the wiring and insulation are correct, you can prepare for power-on debugging; then, according to the specific conditions of the tank 1 of the medium to be measured, determine the installation positions of the upper measuring short section 701 and the lower measuring short section 801. After the positions are determined, the h value in the calculation formula ρ=(P1-P2) / gh is also determined accordingly, and the upper measuring short section 701 and the lower measuring nipple 801 are welded on the tank body 1. During welding, the upper measuring nipple 701 and the lower measuring nipple 801 are ensured to be located at the upper and lower points of a vertical line on the same side of the tank body 1, and the upper measuring nipple 701 and the lower measuring nipple 801 are both inclined upward along the fixed connection with the tank body 1, and the angle between the two and the outer wall of the tank body 1 is set to 45°-80°, so that the medium in the tank body 1 can be discharged smoothly when the tank body 1 is out of use; finally, the pressure value P1 at the liquid level of the tank body 1 detected by the upper single flange pressure transmitter 703 and the pressure value P2 at the liquid level of the tank body 1 detected by the lower single flange pressure transmitter 803 are transmitted to the density display table 5 through the signal line, and the density of the measured liquid in the tank body 1 is calculated according to ρ=ΔP = (P1-P2) / gh, and the standard 4-20mA signal is output to the outside and uploaded to the DCS system. The utility model can respectively measure the liquid surface pressure values ​​at the upper and lower parts of the tank body 1 and input them into the density display table 5 by arranging the upper measuring short section 701 and the lower measuring short section 801 at the upper and lower parts of the tank body 1, and calculate the density of the measured liquid by the formula, thereby ensuring the accuracy of the density value; by arranging the flushing mechanism 6, when an error occurs in the measurement, the upper flushing water valve 705 and the lower flushing water valve 805 are opened, and water enters the upper measuring short section 701 and the lower measuring short section 801 from the water tank along the upper flushing pipeline 704 and the lower flushing pipeline 804, respectively, to flush away the crystals, and the processing is fast, thereby avoiding later maintenance. The utility model ensures an accurate measurement effect, and at the same time is convenient and quick to install, thereby avoiding later maintenance.

[0023] The above contents are merely examples and explanations of the structure of the utility model. The technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the structure of the utility model or exceed the scope defined in the claims, they should all fall within the protection scope of the utility model.

Claims

1. A maintenance-free differential pressure liquid density detection device, comprising a tank body (1), characterized in that: The outer wall of the tank body (1) is provided with a plurality of measuring short sections (2) arranged in parallel and respectively connected to the inside of the tank body (1); each of the measuring short sections (2) is connected to a flushing mechanism (6) via a pipeline; each of the measuring short sections (2) is arranged obliquely upward from the connection with the outer wall of the tank body (1), and the end is connected to a root valve (3) via a flange; the root valve (3) is connected to a single-flange pressure transmitter (4); the plurality of single-flange pressure transmitters (4) are respectively electrically connected to a density display meter (5) via a signal line; and the density display meter (5) is electrically connected to a control mechanism.

2. The maintenance-free differential pressure liquid density detection device according to claim 1, characterized in that: The flushing mechanism (6) comprises a flushing pipeline (601) connected to the measuring nipple (2); the flushing pipeline (601) is connected to a water tank; and a flushing water valve (602) is installed on the flushing pipeline (601).

3. The maintenance-free differential pressure liquid density detection device according to claim 2, characterized in that: The angle between the measuring nipple (2) and the outer wall of the tank body (1) is set to 45°-80°.

4. The maintenance-free differential pressure liquid density detection device according to claim 3, characterized in that: The plurality of measuring short sections (2) are all arranged on the same side of the tank body (1) and located on the same vertical line.

5. The maintenance-free differential pressure liquid density detection device according to claim 4, characterized in that: The number of the measuring short sections (2) is set to two, comprising an upper measuring short section (701) arranged at the upper part of the outer wall of the tank body (1) and a lower measuring short section (801) arranged at the lower part of the outside of the tank body (1), the upper measuring short section (701) and the lower measuring short section (801) being arranged in parallel and located on the same vertical line, and the upper measuring short section (701) and the lower measuring short section (801) being respectively connected to the interior of the tank body (1).

6. The maintenance-free differential pressure liquid density detection device according to claim 5, characterized in that: The upper measuring nipples (701) are arranged obliquely upward from the connection with the outer wall of the tank body (1), and the ends are connected to the upper root valves (702) through flanges. The upper root valves (702) are connected to the upper single flange pressure transmitters (703), and the upper single flange pressure transmitters (703) are electrically connected to the density display meter (5) through signal lines.

7. The maintenance-free differential pressure liquid density detection device according to claim 6, characterized in that: The lower measuring nipple (801) is arranged obliquely upward from the connection with the outer wall of the tank body (1), and the end thereof is connected to a lower root valve (802) via a flange. The upper root valve (702) is connected to a lower single-flange pressure transmitter (803), and the lower single-flange pressure transmitter (803) is electrically connected to the density display meter (5) via a signal line.

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