Metering pump testing device

Abstract

The utility model discloses a metering pump testing device, which is characterized by comprising a water tank, a water outlet pipe connected with the water tank, a plurality of metering pumps connected with the water outlet pipe through pipelines, a back pressure valve A connected with the metering pumps through pipelines, and a back pressure valve B connected with the back pressure valve A through a pipeline, the back pressure valve B and the water tank are connected with a water return pipe; the pipeline between the metering pump and the back pressure valve A is connected with an energy accumulator, the energy accumulator is connected with a safety valve through a pipeline, and the safety valve is connected with a blow-off pipe; and the water return pipe is connected with the blow-off pipe. The testing device can be used for testing different types of metering pumps, the applicability is high, the same testing device can be used for automatically collecting data of a plurality of different types of metering pumps, then various performance indexes of the metering pumps can be calculated through the collected accurate data, the cost is low, and the efficiency is high.

Description

Technical Field

[0001] The utility model relates to a metering pump test, in particular to a metering pump test device. Background Art

[0002] After the metering pump is processed and assembled, it is necessary to test its various performances, including stability accuracy, complex linearity accuracy, linearity, volume coefficient, noise and vibration, etc. During the test, the inlet and outlet pressures, flow rate, temperature and other data of the metering pump need to be detected and recorded, and the corresponding performance can be calculated based on the measured data.

[0003] The existing test platform can only test one type of metering pump and cannot test different types of metering pumps. Different types of metering pumps need to be equipped with corresponding test platforms, which is costly and has low detection efficiency. Therefore, a metering pump test device is proposed. Utility Model Content

[0004] The purpose of the utility model is to solve the above problems and to provide a metering pump test device.

[0005] In order to achieve the above-mentioned purpose, the utility model provides the following technical solution: a metering pump test device, which is characterized in that it includes a water tank, a water outlet pipe connected to the water tank, a plurality of metering pumps connected to the water outlet pipe through a pipeline, a back pressure valve A connected to the metering pump through a pipeline, and a back pressure valve B connected to the back pressure valve A through a pipeline; the back pressure valve B is connected to the water tank via a return pipe; an accumulator is connected to the pipeline between the metering pump and the back pressure valve A, the accumulator is connected to a safety valve via a pipeline, and the safety valve is connected to a sewage pipe; the return pipe is connected to the sewage pipe.

[0006] Further preferably, a ball valve is installed between the water outlet pipe and the metering pump.

[0007] Further preferably, a pressure gauge and a pressure transmitter are also installed on the pipeline between the metering pump and the back pressure valve A.

[0008] More preferably, it also includes a thermometer, a temperature transmitter, a mass flow meter and an electric regulating valve arranged on the pipeline between the back pressure valve A and the back pressure valve B.

[0009] Further preferably, it also includes a liquid level transmitter, a pressure gauge, a thermometer, a pressure transmitter, a temperature transmitter, an electric heating tube and a vacuum pump installed on the water tank.

[0010] Further preferably, it also includes a pressure gauge, a thermometer, a pressure transmitter and a temperature transmitter installed on the water outlet pipe.

[0011] The beneficial effects of the present invention are as follows: the test device can be used to conduct experiments on metering pumps of different models, and has high applicability. The same test device can automatically collect data on multiple metering pumps of different models, and then the various performance indicators of the metering pumps can be calculated through the collected accurate data, which is low-cost and high-efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Attachment Figure 1 It is a process flow diagram of the utility model;

[0013] Attachment Figure 2 It is a partial process flow diagram of the utility model.

[0014] Legend: 1. Water tank; 2. Metering pump; 3. Back pressure valve A; 4. Back pressure valve B; 5. Return pipe; 6. Accumulator; 7. Safety valve; 8. Drain pipe; 9. Ball valve; 10. Pressure gauge; 11. Pressure transmitter; 12. Thermometer; 13. Temperature transmitter; 14. Mass flow meter; 15. Electric control valve; 16. Electric heating tube; 17. Liquid level transmitter; 18. Vacuum pump; 19. Outlet pipe. DETAILED DESCRIPTION

[0015] Below we further explain the metering pump test device described in the utility model with reference to the accompanying drawings.

[0016] It should be noted that all directional indications such as up, down, left, right, front, back, etc. in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components in a certain specific posture as shown in the accompanying drawings. If the specific posture changes, the directional indication will also change accordingly.

[0017] In this utility model, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; it can mean mechanical connection or electrical connection; it can mean direct connection or indirect connection through an intermediate medium; it can mean internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0018] See Figure 1-2As shown in , a metering pump test device is characterized by including a water tank 1, a water outlet pipe 19 connected to the water tank 1, a plurality of metering pumps 2 connected to the water outlet pipe 19 through a pipeline, a back pressure valve A3 connected to the metering pump 2 through a pipeline, and a back pressure valve B4 connected to the back pressure valve A3 through a pipeline; the back pressure valve B4 is connected to the water tank 1 through a return pipe 5; the pipeline between the metering pump 2 and the back pressure valve A3 is connected to an accumulator 6, the accumulator 6 is connected to a safety valve 7 through a pipeline, and the safety valve 7 is connected to a sewage pipe 8; the return pipe 5 is connected to the sewage pipe 8;

[0019] This test device can be used to conduct experiments on metering pumps 2 of different models, and has high applicability. In addition, the same test device can automatically collect data on multiple metering pumps 2 of different models, and then calculate various performance indicators of the metering pumps 2 based on the collected accurate data, with low cost and high efficiency.

[0020] The accumulator 6 is used to stabilize the outlet pressure of the metering pump 2; the back pressure valve A3 is set to apply additional pressure to the medium pumped out by the metering pump 2, thereby adjusting the medium pressure;

[0021] The setting of the safety valve 7 prevents the medium pressure between the metering pump 2 and the back pressure valve A3 from exceeding the set value and then being discharged into the sewage pipe 8 through the safety valve 7 and then releasing the pressure through the sewage pipe 8;

[0022] By providing the drain pipe 8 , the medium can be discharged through the drain pipe 8 when the medium is replaced.

[0023] In one embodiment, a ball valve 9 is installed between the outlet pipe 19 and the metering pump 2; the ball valve 9 includes a main ball valve 9 installed on the outlet pipe 19 and auxiliary ball valves 9 installed on several branch pipes, which are used to control the outlet flow and outlet pressure.

[0024] In one embodiment, a pressure gauge 10 and a pressure transmitter 11 are further installed on the pipeline between the metering pump 2 and the back pressure valve A3. The pressure gauge 10 is used to directly display the pressure value, and the pressure transmitter 11 is used to send the detected pressure value to the control system or control terminal.

[0025] The pressure gauge 10 and the pressure transmitter 11 between the metering pump 2 and the back pressure valve A3 are used to detect the output pressure of the metering pump 2.

[0026] In one embodiment, the invention further includes a thermometer 12, a temperature transmitter 13, a mass flow meter 14 and an electric regulating valve 15 provided on the pipeline between the back pressure valve A3 and the back pressure valve B4;

[0027] The thermometer 12 is used to display the temperature value in real time on site, the temperature transmitter 13 is used to send the detected temperature value to the system or control terminal in real time, the mass flow meter 14 is used to detect the flow rate, and the electric control valve 15 is used to control the opening and closing of the flow path; through the setting of the back pressure valve B4, a back pressure effect is exerted on the medium flowing out of the back pressure valve A3, ensuring that the medium in the pipeline between the back pressure valve A3 and the back pressure valve B4 has a certain pressure value, thereby ensuring that the mass flow meter 14 can accurately detect the flow rate in this interval.

[0028] In one embodiment, it also includes a liquid level transmitter 17, a pressure gauge 10, a thermometer 12, a pressure transmitter 11, a temperature transmitter 13, an electric heating tube 16 and a vacuum pump 18 installed on the water tank 1; the electric heating tube 16 is used to heat the medium in the water tank 1, and the liquid level transmitter 17 is used to detect the liquid level of the medium in the water tank 1; through the setting of the vacuum pump 18, when the water tank 1 needs to be in a vacuum, the water tank 1 is evacuated by the vacuum pump 18.

[0029] In one embodiment, it also includes a pressure gauge 10, a thermometer 12, a pressure transmitter 11 and a temperature transmitter 13 installed on the water outlet pipe 19; the pressure gauge 10, the thermometer 12, the pressure transmitter 11 and the temperature transmitter 13 through the water outlet pipe 19 are used to detect the pressure value and temperature value of the medium at the outlet end of the water tank 1, that is, the inlet end of the metering pump 2.

[0030] When the utility model is in use: by opening the ball valve 9 on the outlet pipe 19 and the branch pipe connected to the metering pump 2, the inlet pressure value and temperature value of the metering pump 2 are detected by the pressure transmitter 11 and the temperature transmitter 13 and sent to the system or control terminal. After the medium is output by the metering pump 2, the output pressure value of the metering pump 2 is detected by the pressure transmitter 11. The output medium enters the pipeline between the back pressure valve A3 and the back pressure valve B4 after back pressure by the back pressure valve A3. A certain pressure is applied to the medium in this interval by the back pressure valve B4. Then, the outlet flow is detected by the mass flow meter 14, and the outlet temperature is detected by the temperature transmitter 13 and the data is sent to the system or control terminal. Then, the medium flows back to the water tank 1 through the electric regulating valve 15 and the return pipe 5.

[0031] When testing metering pumps 2 of different models, it is only necessary to switch the ball valve 9 and the electric regulating valve 15 connected to the metering pump 2 .

[0032] The protection scope of the present invention is not limited to the above embodiment and its variations. Conventional modifications and replacements made by those skilled in the art based on the contents of this embodiment fall within the protection scope of the present invention.

Claims

1. A metering pump test device, characterized in that The invention comprises a water tank (1), a water outlet pipe (19) connected to the water tank (1), a plurality of metering pumps (2) connected to the water outlet pipe (19) through a pipeline, a back pressure valve A (3) connected to the metering pump (2) through a pipeline, and a back pressure valve B (4) connected to the back pressure valve A (3) through a pipeline; the back pressure valve B (4) and the water tank (1) are connected via a return pipe (5); a buffer is connected to the pipeline between the metering pump (2) and the back pressure valve A (3), the buffer is connected to a safety valve (7) through a pipeline, and the safety valve (7) is connected to a sewage pipe (8); the return pipe (5) is connected to the sewage pipe (8).

2. A metering pump test device according to claim 1, characterized in that: A ball valve (9) is installed between the water outlet pipe (19) and the metering pump (2).

3. A metering pump test device according to claim 1, characterized in that: A pressure gauge (10) and a pressure transmitter (11) are also installed on the pipeline between the metering pump (2) and the back pressure valve A (3).

4. A metering pump test device according to claim 1, characterized in that: The device also includes a thermometer (12), a temperature transmitter (13), a mass flow meter (14), and an electric regulating valve (15) arranged on the pipeline between the back pressure valve A (3) and the back pressure valve B (4).

5. A metering pump test device according to claim 1, characterized in that: The invention also includes a liquid level transmitter (17), a pressure gauge (10), a thermometer (12), a pressure transmitter (11), a temperature transmitter (13), an electric heating tube (16) and a vacuum pump (18) installed on the water tank (1).

6. A metering pump test device according to claim 1, characterized in that: The device also includes a pressure gauge (10), a thermometer (12), a pressure transmitter (11) and a temperature transmitter (13) installed on the water outlet pipe (19).

Images