CN204705497U - A liquid flow measurement system - Google Patents

Abstract

The utility model relates to a liquid flow measurement system, including liquid supply system and measurement system, liquid supply system comprises basin and liquid distributor, and measurement system comprises measuring device and the control system who links to each other, and measuring device is including installing total flow measurement device, total pressure measurement device on each riser to and a plurality of removal measuring device who is used for measuring liquid distributor local flow. The utility model can conveniently and accurately detect the liquid distribution uniformity of the liquid distributor by measuring and recording the flow data of different areas of the liquid distributor, and provide reliable basis for judging the performance of the liquid distributor; the utility model has wide application range and can measure in a large flow variation range; the device has the advantages of convenient and fast measurement, high automation degree and high measurement precision, and can simultaneously measure a plurality of measurement points, thereby greatly improving the measurement efficiency.

Description

A liquid flow measurement system

technical field

The utility model relates to the technical field of liquid distributors and metering, in particular to a liquid flow measurement system which can be used to detect the distribution uniformity of a liquid distributor.

Background technique

In the packed tower, a liquid distributor is needed to distribute the feed liquid. In order to better play the performance of the packing, it is often necessary to be equipped with high-performance liquid distributors and other tower internals. The main criterion for measuring the performance of a liquid distributor is the uniformity of its liquid distribution.

The liquid distributor manufactured by industrial production should be tested for the uniformity of liquid distribution before leaving the factory, but at present there are few such testing platforms, and the range of flow changes that can be detected by the testing platform is small, and the degree of automation is low. Therefore, in industrial practice, it is necessary to design a liquid flow measurement system with a large change range of measurable flow rate and a high degree of automation.

Contents of the invention

The utility model provides a liquid flow measurement system, which can conveniently and accurately detect the liquid distribution uniformity of the liquid distributor by measuring and recording the flow data in different areas of the liquid distributor, and provide a reliable basis for judging the performance of the liquid distributor , and improve the working efficiency of the packed tower by providing a high-performance liquid distributor; the system has a wide range of applications and can measure within a large flow range; the measurement is convenient and fast, with a high degree of automation and high measurement accuracy, and can measure multiple Points are measured at the same time, which greatly improves the measurement efficiency.

In order to achieve the above object, the utility model adopts the following technical solutions to realize:

A liquid flow measurement system, including a liquid supply system and a measurement system, the liquid supply system is mainly composed of a water tank and a liquid distributor, and the water tank is connected by a plurality of water tank outlet pipes connected in sequence, a main pipe and a plurality of standpipes The feed pipe of the liquid distributor and the outlet pipe of the tank are equipped with a centrifugal pump; the measurement system is mainly composed of a measurement device and a connected control system. The measurement device includes a total flow measurement device and a total pressure measurement device installed on each standpipe. and several mobile measuring devices for measuring the local flow of liquid distributors.

The total flow measuring device on the standpipe is a flow meter one, the total pressure measuring device is a pressure sensor, and an electric valve is also installed on the standpipe.

The mobile measuring device is composed of a sampling cylinder and a connected flowmeter, and is placed under the liquid distributor when in use.

The control system consists of a single-chip microcomputer and its peripheral circuits. The centrifugal pump, the measuring device and the electric valve on the standpipe are respectively connected to the control system. The control system has the functions of controlling the opening and closing of the centrifugal pump, adjusting the total flow of the system and measuring the results of the measuring device. It has the function of automatic recording, and each measuring device and electric valve can be controlled separately.

A steel grid is arranged above the water tank, which can also be used as a measurement and test platform; manual valves are respectively arranged on the outlet pipes of the water tank on both sides of the centrifugal pump.

The liquid distributor is a trough or spray liquid distributor. The top of the spray liquid distributor is provided with an annular or polygonal liquid distributor feed pipe along the circumferential direction, and multiple interfaces are provided at the bottom to connect the hose and the nozzle. connect.

The measurement system also includes a fast imaging device for photographing the particle size of the droplet, specifically a high-speed digital camera installed on the platform below the outlet of the nozzle of the liquid distributor and around the outlet of the nozzle.

Compared with the prior art, the beneficial effects of the utility model are:

1) By measuring, recording and processing the flow data in different areas of the liquid distributor, the uniformity of the liquid distributed by the liquid distributor can be detected conveniently and accurately, providing a reliable basis for judging the performance of the liquid distributor, and by providing a high-performance liquid distributor, Improve the working efficiency of the packed tower;

2) The system has a wide range of applications and can measure within a large flow range; the design of the pipeline can meet the needs of different flow changes, so that each measuring device can work within the best measurement range;

3) The measurement is convenient and fast, with a high degree of automation and high measurement accuracy, and can measure multiple measurement points at the same time, greatly improving the measurement efficiency.

Description of drawings

Fig. 1 is a schematic front view of the liquid flow measurement system of the present invention. (The liquid distributor to be tested is a trough liquid distributor)

Fig. 2 is a schematic top view of the liquid flow measurement system described in the present invention;

Fig. 3 is the A direction view in Fig. 1;

Fig. 4 is a schematic structural view of the mobile measuring device described in the present invention;

Fig. 5 is a schematic structural view of the feed pipe of the spray liquid distributor described in the present invention;

Fig. 6a is a first schematic diagram of the connection structure between the feed pipe and the nozzle of the spray liquid distributor of the present invention. (Combined spray head is located inside the feed pipe of the liquid distributor)

Fig. 6b is the second schematic diagram of the connection structure between the feed pipe and the nozzle of the spray liquid distributor of the present invention. (The combination nozzle is located outside the feed pipe of the liquid distributor, and the single nozzle is located inside the feed pipe of the liquid distributor)

Fig. 7 is a schematic structural view of the spray liquid distributor flow measurement system described in the present invention;

Labels in the figure: 1. Water tank 2. Manual valve 3. Centrifugal pump 4. Main pipe 5. Standpipe 6. Flow meter 1 7. Pressure sensor 8. Electric valve 9. Water tank inlet pipe 10. Liquid distributor 11. Mobile measurement Device 12. Control system 13. Steel grid 14. Sampling cylinder 15. Cart 16. Flow meter 2 17. Rapid imaging device 18. Interface 19. Connecting hose 20. Nozzle 21. Liquid distributor feed pipe 22. Pressure surface

Detailed ways

The specific embodiment of the utility model will be further described below in conjunction with accompanying drawing:

See Fig. 1-Fig. 3, it is the structure schematic diagram of the present utility model, a kind of liquid flow measurement system of the present utility model, comprises liquid supply system and measuring system, and described liquid supply system mainly is made up of water tank 1 and liquid distributor 10, and water tank 1 Connect the feed pipe 21 of the liquid distributor through a plurality of water tank outlet pipes connected in sequence, a main pipe 4 and a plurality of standpipes 5, and a centrifugal pump 3 is arranged on the water tank outlet pipe; the measurement system is mainly composed of a measuring device and connected The control system 12 consists of the measuring device including a total flow measuring device installed on each standpipe 5, a total pressure measuring device, and a plurality of mobile measuring devices 11 for measuring the local flow of the liquid distributor 10.

The total flow measuring device on the standpipe 5 is a flow meter one 6, the total pressure measuring device is a pressure sensor 7, and an electric valve 8 is also installed on the standpipe 5.

As shown in FIG. 4 , the mobile measuring device 11 is composed of a sampling cylinder 14 and a connected flow meter 16 , and is placed under the liquid distributor 10 during use.

The control system 12 is composed of a single-chip microcomputer and its peripheral circuits. The centrifugal pump 3, the measuring device and the electric valve 8 on the standpipe 5 are connected to the control system 12 respectively. The flow rate and the function of automatically recording the measurement results of the measuring device, and each measuring device and electric valve 8 can be controlled separately.

A steel grid 13 is arranged above the water tank 1, which can also be used as a measurement and test platform; manual valves 2 are respectively arranged on the outlet pipes of the water tank on both sides of the centrifugal pump 3.

The liquid distributor 10 is a trough-type or spray-type liquid distributor. The upper part of the spray-type liquid distributor is provided with an annular or polygonal liquid distributor feed pipe 21 along the circumferential direction, and a plurality of interfaces 18 are arranged at the bottom of the liquid distributor through connecting flexible pipes. The tube 19 is connected to the spray head 20 . (as shown in Figure 7)

The measurement system also includes a fast imaging device 17 for photographing the size of the droplet size, specifically a high-speed digital camera installed on the platform below the outlet of the liquid distributor nozzle 20 and around the outlet of the nozzle 20 .

The liquid flow measurement method based on a liquid flow measurement system described in the utility model is as follows:

Open the two manual valves 2 on the outlet pipe of the water tank, open the control system 12, select a plurality of corresponding detection points according to the form and specification of the liquid distributor 10, and start the centrifugal pump 3;

The liquid flows out from the outlet pipe of the water tank, passes through the main pipe 4 and a plurality of standpipes 5, and then flows into the feed pipe 21 of the liquid distributor, and enters the liquid distributor 10 to be tested through the nozzle 20 arranged under the feed pipe. The control system 12 Control the opening of the electric valve 8 to adjust the total flow to the specified value, detect and record the total flow and total pressure through the total flow measurement device and the total pressure measurement device in the measurement system, and then pass the mobile measurement device 11 in the measurement device The flow rates of different branch pipes or branch areas of the liquid distributor 10 to be tested are measured and recorded.

The utility model can be used to detect liquid distributors 10 with various diameters and specifications. In one test, the flow value in the liquid distributor 10 can be adjusted arbitrarily within the range of the total flow measurement range.

The mobile measurement device 11 reads the flow data every few seconds, and sends it back to the control system 12 for recording. By taking the average value of the read data over a period of time, the flow in the branch pipe or branch area is calculated.

A manual valve 2, a centrifugal pump 3 and another manual valve 2 are arranged in turn on each outlet pipe of the water tank 1, and after the multiple outlet pipes pass through the second manual valve 2, the liquid flows into a large-diameter In the main pipe 4, several standpipes 5 with different diameters are drawn from the main pipe 4 according to the needs of the measured flow rate, and the liquid is led to a specified height, and finally introduced into the liquid distributor 10 to be tested through the pipeline.

The control system 12 has an online detection and recording function, including several detection lines, corresponding to several risers 5 with different diameters, that is, one riser 5 corresponds to one detection line, and according to the difference of the measured material and flow rate, each riser 5 Corresponding flowmeter 16, pressure sensor 7 and electric valve 8 are respectively installed on it. The total flow and total pressure of the system are measured by the flow meter 1 6 and the pressure sensor 7 on the standpipe 5 and the data are transmitted to the control system 12 .

The flow measurement of the branch pipe or branch area of the liquid distributor 12 to be tested is completed by a plurality of mobile measuring devices 11, and each mobile measuring device 11 is composed of a sampling cylinder 14 connected to a flow meter 16, and the flow meter 16 is connected to the control system 12 Connect and transfer data. According to the difference in the flow rate of the branch pipe or branch area, the sampling cylinder 14 can be made into different opening forms and heights, and the corresponding flow meter 16 can also choose a suitable flow meter according to the size of the material and flow. The mobile measuring device 11 can be moved arbitrarily by devices such as a trolley 15 to measure the flow in different branch pipes or branch areas.

Controlled by the control system 12, each detection line can independently complete the opening and closing of the centrifugal pump 3, the manual or automatic adjustment of the total flow, the measurement and recording of the total flow and total pressure, and the branch pipe or branch of the liquid distributor 10 to be tested. Regional flow measurement and recording functions.

The following examples are implemented on the premise of the technical solutions of the present utility model, and detailed implementation methods and specific operation processes are provided, but the protection scope of the present utility model is not limited to the following examples. The methods used in the following examples are conventional methods unless otherwise specified.

【Example 1】

Referring to accompanying drawing 1, it is the specific structural form of a kind of liquid flow measurement system provided by this embodiment, the liquid distributor to be tested is a trough liquid distributor, and a steel grid 13 is laid above the water tank 1, which can also be used as a flow measurement test platform. Water tank 1 is provided with a water tank inlet pipe 9 and three water tank outlet pipes with different diameters. Each water tank outlet pipe is connected with a manual valve 2 behind it, and then connected with a centrifugal pump 3, and a manual valve 2 is connected behind the centrifugal pump 3 ; After the 3 liquid outlet pipes of the sink pass through the second manual valve 2, the liquid is merged into a main pipe 4 with a larger diameter. According to the needs of the measured flow rate, three standpipes 5 with different diameters are drawn from the main pipe 4 to lead the liquid to a specified height, and then introduced into the trough-type liquid distributor 10 to be tested through the pipeline.

The control system 12 contains 3 detection lines, corresponding to 3 risers 5 with different diameters, that is, 1 riser corresponds to a detection line, and each riser 5 is equipped with a corresponding flow rate according to the difference of the measured material and flow rate. Meter one 6, pressure sensor 7 and electric valve 8. The total flow and total pressure of the system are measured by the flowmeter-6 and the pressure sensor 7 on the standpipe 5.

The flow measurement of the branch pipe or branch area of the trough-type liquid distributor 10 to be tested is completed by the mobile measuring device 11 , which is composed of a sampling cylinder 14 connected to a flow meter 2 16 . According to the difference in the flow rate of the branch pipe or the branch area, the sampling cylinder 14 can be made into different opening forms and heights. In this embodiment, the sampling cylinder 14 is a square cylinder, and the corresponding flow meter 16 can also be made according to the material and flow rate. Choose the right flowmeter for the size of the flowmeter. The measuring device 11 can be moved arbitrarily by being mounted on a trolley 15, so as to measure the flow in different branch pipes or branch areas. The mobile measurement device 11 reads the flow data every few seconds and sends it back to the control system 12 for recording. By taking the average value of the data read over a period of time, the flow in the branch pipe or branch area can be known.

[Example 2]

In this embodiment, the liquid distributor 10 to be tested is a spray liquid distributor, and the rest of the liquid supply system and flow measuring device are completely the same as those in Embodiment 1. The control system 12 has added a set of fast imaging device 17 compared with embodiment 1, namely on the platform below the outlet of the liquid distributor nozzle 20 and around the outlet of the nozzle 20, several high-speed digital cameras are installed for photographing the size of the droplet size.

Referring to FIG. 5 , the bottom of the feed pipe 21 of the spray liquid distributor of this embodiment is provided with several interfaces 18 connected to the connecting hose 19 , and the hose is connected to the nozzle 20 . The feed loop 21 can be a circular loop or a polygonal loop, a polygonal loop is shown in Figures 6a and 6b. By adopting this connection method, it is possible to test the single nozzles of the spray distributor 10 of various diameter towers and various forms of combined arrangement nozzles, as shown in Fig. 6a and Fig. 6b, two kinds of connection forms are listed, wherein Figure 6a is the connection structure when the combined nozzle is located inside the feed pipe 21 of the liquid distributor, Figure 6b is the connection structure when the combined nozzle is located outside the feed pipe 21 of the liquid distributor, and the single nozzle is located inside the feed pipe 21 of the liquid distributor.

In this embodiment, when the measuring system is used to measure the flow rate of the spray liquid distributor, the steps are basically the same as the process of measuring the trough liquid distributor, the difference is that a pressure gauge 16 is set at the inlet of the nozzle 20 to measure the pressure. During the test, the rapid imaging device 17 was used to take pictures and measure the particle size of the droplets.

Claims (7)

1. A liquid flow measurement system, characterized in that it includes a liquid supply system and a measurement system, the liquid supply system is mainly composed of a water tank and a liquid distributor, and the water tank is connected in sequence through a plurality of water tank outlet pipes and a main pipe The feed pipe of the liquid distributor is connected with multiple standpipes, and a centrifugal pump is installed on the outlet pipe of the water tank; the measuring system is mainly composed of a measuring device and a connected control system, and the measuring device includes a total flow measuring device installed on each standpipe , a total pressure measuring device, and several mobile measuring devices for measuring the local flow of the liquid distributor. 2. A kind of liquid flow measuring system according to claim 1, characterized in that, the total flow measuring device on the standpipe is a flowmeter one, the total pressure measuring device is a pressure sensor, and an electric motor is installed on the standpipe. valve. 3. A liquid flow measuring system according to claim 1, characterized in that the mobile measuring device consists of a sampling cylinder and a connected flow meter, and is placed under the liquid distributor when in use. 4. A kind of liquid flow measurement system according to claim 1, characterized in that, the control system is composed of a single-chip microcomputer and its peripheral circuit, and the electric valves on the centrifugal pump, the measuring device and the standpipe are respectively connected with the control system, The control system has the functions of controlling the opening and closing of the centrifugal pump, adjusting the total flow of the system and automatically recording the measurement results of the measuring devices, and each measuring device and electric valve can be controlled separately. 5. A kind of liquid flow measurement system according to claim 1, characterized in that, a steel grid is provided above the water tank, which can also be used as a measurement and test platform; the water tank outlet pipes on both sides of the centrifugal pump are respectively provided with manual valve. 6. A liquid flow measurement system according to claim 1, characterized in that, the liquid distributor is a trough or spray liquid distributor, and the top of the spray liquid distributor is provided with a ring or a The feed pipe of the polygonal liquid distributor is provided with multiple interfaces at the bottom to connect with the spray head through the connecting hose. 7. A liquid flow measurement system according to claim 1, characterized in that the measurement system also includes a fast imaging device for photographing the size of the droplet size, specifically installed under the outlet of the nozzle of the liquid distributor High-speed digital cameras on the platform and around the nozzle outlet.