Experimental device of screw pump

Abstract

The utility model relates to the technical field of screw pump experiments, in particular to an experimental device of a screw pump. The experimental device comprises a screw pump, a motor, a first pipeline assembly, a second pipeline assembly, a flow meter and a control terminal, the motor is connected with the screw pump and used for driving the screw pump to rotate. The first pipeline assembly is connected with an inlet of the screw pump, and the first pipeline assembly is used for conveying an experimental medium to the screw pump at a constant pressure; the second pipeline assembly is connected with an outlet of the screw pump, and the second pipeline assembly is used for outwards conveying the experimental medium pumped by the screw pump; the flow meter is installed on the second pipeline assembly and used for conducting flow metering on the experiment medium output by the second pipeline assembly and outputting the experiment medium outwards; the control terminal is connected with the motor and the flow meter, and the control terminal is used for configuring operation parameters of the motor and receiving flow data output by the flow meter when the screw pump is driven by the operation parameters; the practical device can be used for implementing the stability experiment of the screw pump.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of screw pump experiment, especially a kind of experimental device of screw pump. BACKGROUND

[0002] At present, in domestic industrial field, screw pump is used in pollution discharge, mining, food production and so on, and the control precision of its pumping is lower, and there is no technical index requirement for the stability of pumping flow. However, with the increasingly wide application of screw pump, the control of screw pump has higher requirement in industrial application. For example, in hydrogen fuel cell industry, the screw pump used by hydrogen fuel cell equipment has higher requirement for flow stability, so an experimental device for measuring the flow stability of screw pump is needed. UTILITY MODEL CONTENT

[0003] In view of the above technical problems, the utility model provides an experimental device of screw pump, which can implement the flow stability experiment of screw pump to improve the flow control precision of screw pump.

[0004] The utility model embodiment provides the following scheme:

[0005] The utility model embodiment provides an experimental device of screw pump, and the device comprises:

[0006] Screw pump;

[0007] Motor, connected screw pump, motor is used to drive screw pump rotation;

[0008] First pipeline assembly, the inlet of screw pump is connected, and first pipeline assembly is used to deliver experimental medium to screw pump with constant pressure;

[0009] Second pipeline assembly, the outlet of screw pump is connected, and second pipeline assembly is used to deliver experimental medium pumped by screw pump;

[0010] Flowmeter, install on second pipeline assembly, flowmeter is used to carry out flow measurement to the experimental medium exported by second pipeline assembly, and exports;

[0011] Control terminal is connected with motor and flowmeter, and control terminal is used to configure the operating parameter of motor, and receives the flow data exported by flowmeter when screw pump is driven by operating parameter.

[0012] In an alternative embodiment, first pipeline assembly comprises:

[0013] First pipeline, the inlet of screw pump is communicated, and first pipeline is used to deliver experimental medium to screw pump;

[0014] The first valve is installed on the first pipeline and is used to adjust the flow of the experimental medium in the first pipeline.

[0015] In an alternative embodiment, the first valve is an overflow valve, and the overflow valve is connected to a preset storage tank for storing the experimental medium.

[0016] In an alternative embodiment, the storage tank is connected to the outlet of the second pipeline assembly to form a circulation path for the experimental medium in the experimental device.

[0017] In an alternative embodiment, the second pipeline assembly comprises:

[0018] The second pipeline is connected to the outlet of the screw pump and is used to deliver the experimental medium pumped by the screw pump;

[0019] The second valve is installed on the second pipeline and is used to adjust the flow of the experimental medium in the second pipeline.

[0020] In an alternative embodiment, the second valve is an electromagnetic control valve connected to the control terminal.

[0021] In an alternative embodiment, the device further comprises:

[0022] The pressure gauge is installed on the second pipeline assembly and is used to measure the medium pressure of the experimental medium in the second pipeline assembly.

[0023] In an alternative embodiment, the pressure gauge is a digital pressure gauge connected to the control terminal to transmit the measured medium pressure to the control terminal.

[0024] In an alternative embodiment, the motor is a servo motor; and the device further comprises:

[0025] The universal coupling is connected to the screw pump at one end and to the servo motor at the other end.

[0026] In an alternative embodiment, the control terminal comprises:

[0027] The controller has a control port connected to the motor and a data output port connected to the flow meter.

[0028] The host computer is connected to the communication port of the controller.

[0029] Compared with the prior art, the experimental device of the screw pump has the following advantages:

[0030] The utility model discloses an experimental device of screw pump, motor, first pipeline subassembly, second pipeline subassembly, flowmeter and control terminal, the motor is connected screw pump, and the motor is used for driving screw pump rotation, the first pipeline subassembly is connected the entrance of screw pump, and the first pipeline subassembly is used to deliver experimental medium to screw pump with constant pressure, the second pipeline subassembly is connected the outlet of screw pump, and the second pipeline subassembly is used to deliver the experimental medium pumped by screw pump to outside, the flowmeter is installed on the second pipeline subassembly, and the flowmeter is used to carry out flow measurement to the experimental medium exported by the second pipeline subassembly and exports, the control terminal is connected with the motor and flowmeter, and the control terminal is used to configure the operating parameter of motor and receives the flow data exported by flowmeter when screw pump is driven by operating parameter. BRIEF DESCRIPTION OF DRAWINGS

[0031] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description only represent some of the embodiments of the present application, and other drawings can also be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0032] Figure 1 A structural schematic view of an experimental device of a screw pump provided by the utility model embodiment.

[0033] Marked with 1- screw pump, 2- motor, 3- first pipeline subassembly, 4- second pipeline subassembly, 5- flowmeter, 6- control terminal, 7- pressure gauge, 8- universal coupling, 9- storage pool, 10- clamp.

[0034] 31- first pipeline, 32- first valve.

[0035] 41- second pipeline, 42- second valve.

[0036] 61- controller, 62- host computer. DETAILED DESCRIPTION

[0037] The technical scheme in the utility model embodiments will be described clearly and completely in combination with the drawings in the utility model embodiments. Obviously, the described embodiments only represent some of the embodiments of the utility model, rather than all the embodiments. Based on the utility model embodiments, all other embodiments obtained by those skilled in the art belong to the protection scope of the utility model embodiments.

[0038] Please refer to Figure 1 ,Figure 1 A structure schematic diagram of an experimental device of a screw pump is provided for the embodiment of the utility model. The experimental device comprises a screw pump 1, a motor 2, a first pipeline assembly 3, a second pipeline assembly 4 and a flowmeter 5.

[0039] The screw pump 1 can be selected based on its use requirement and is erected by a support. For example, when applied to hydrogen fuel cell related equipment, a suitable model of screw pump 1 can be selected. The motor 2 is connected to the screw pump 1 and can be a direct current motor, which is used to drive the screw pump 1 to rotate. It can be understood that the main working components of the screw pump 1 are the screw (called rotor) of the eccentric screw body and the screw bushing (called stator) with a double helical surface on the inner surface. When the motor 2 drives the pump shaft of the screw pump 1 to rotate, the screw rotates around its own axis and rolls along the inner surface of the bushing, thus forming a sealed cavity of the pump. With each rotation of the screw, the liquid in the sealed cavity is pushed forward by one pitch, and with the continuous rotation of the screw, the experimental medium (or liquid medium) is pressed from one sealed cavity to another in a spiral manner, and finally extruded out of the pump body.

[0040] The first pipeline assembly 3 is connected to the inlet of the screw pump 1 and is used to deliver the experimental medium to the screw pump 1 at a constant pressure. The experimental medium is the medium delivered by the screw pump 1, such as water; of course, it can also be hydraulic oil and other liquid media that need to be delivered. Delivering the experimental medium to the screw pump 1 at a constant pressure can ensure the stability of the inlet pressure of the screw pump 1 and the stability of the output flow of the experimental screw pump 1 when it is running. The first pipeline assembly 3 can be set based on actual requirements, for example, setting a storage tank to store experimental medium at a constant level. Since the liquid level of the experimental medium is constant, the experimental medium can be delivered to the screw pump 1 at a constant pressure.

[0041] The way to keep the constant liquid level of the storage tank can be implemented by a floating ball valve. A floating ball valve is installed at the water inlet of the storage tank. When the liquid level drops, the floating ball lowers, the valve opens, and water flows into the storage tank; when the liquid level rises to the set height, the floating ball floats to make the valve close, thereby keeping the liquid level constant. Of course, the control system can also be implemented by a liquid level gauge and a water pump. A liquid level gauge is installed in the storage tank, and the high and low liquid level values are set. When the liquid level is lower than the set low value, the liquid level gauge sends a signal to start the water pump to inject water into the storage tank; when the liquid level reaches the set high value, the liquid level gauge sends a signal to stop the water pump. By this way of automatically controlling the start and stop of the water pump, the liquid level of the storage tank is kept stable.

[0042] The second pipeline assembly 4 is connected to the outlet of the screw pump 1, and is used to deliver the experimental medium pumped by the screw pump 1. To adapt to experiments of different types of screw pumps 1, the connection between the second pipeline assembly 4 and the screw pump 1 can be implemented by a clamp, which is convenient to disassemble and has good convenience. The second pipeline assembly 4 can include a pipeline with a preset caliber, which is used to deliver the experimental medium output by the screw pump 1. Of course, the second pipeline assembly 4 can also be composed of multiple pipelines with different calibers. The caliber of the pipeline close to the outlet of the screw pump 1 is relatively large, and the caliber of the pipeline far from the outlet of the screw pump 1 is relatively small, so as to control the pressure of the experimental medium output by the screw pump 1.

[0043] The flow meter 5 can be selected based on experimental requirements, for example, a flow meter 5 with a small flow rate can be selected to implement accurate flow measurement. The flow meter 5 is installed on the second pipeline assembly 4, and is used to measure the flow rate of the experimental medium output by the second pipeline assembly 4 and output externally.

[0044] The control terminal 6 is connected to the motor 2 and the flow meter 5, and is used to configure the operating parameters of the motor 2 and receive the flow data output by the flow meter 5 when the screw pump 1 is driven by the operating parameters. The operating parameters can be motor speed or operating voltage, which can control the motor in different operating states. The control terminal 6 can be an industrial computer, a PLC (Programmable Logic Controller), or a control system composed of an upper computer, which can implement operating parameter setting and flow data acquisition, and is not limited here.

[0045] For example, the first pipeline assembly 3 includes a first pipeline 31 and a first valve 32.

[0046] The first pipeline is connected to the inlet of the screw pump 1 and is used to deliver the experimental medium to the screw pump 1. The first valve is installed on the first pipeline and is used to adjust the flow rate of the experimental medium in the first pipeline. The material of the first pipeline is selected according to the characteristics of the experimental medium, such as corrosion-resistant material, to ensure the safety and stability of the pipeline. The size of the pipe diameter is accurately calculated to meet the flow demand range of the screw pump 1. The first valve is installed on the pipeline to accurately control the flow. It can be an electric regulating valve or a manual ball valve, etc. The opening of the first valve is changed by rotating or electrically controlling, so as to change the flow rate and flow rate of the experimental medium in the first pipeline, and realize accurate adjustment of the medium flow entering the screw pump 1.

[0047] Specifically, the first valve 32 is set as an overflow valve, which is connected to a preset storage tank 9 for storing experimental medium. Please continue to refer to Figure 1The storage tank 9 can be erected to have a higher installation level than the screw pump 1, and an overflow valve can be installed on the pipeline between the storage tank 9 and the screw pump 1 to keep the inlet of the screw pump 1 at a constant pressure.

[0048] Further, the storage tank 9 is connected to the outlet of the second pipeline assembly 4 to form a circulation path for the experimental medium in the experimental device. When the screw pump 1 is running, the experimental medium can continuously flow in the circulation path, reducing the influence of external factors on the experimental results.

[0049] For example, the second pipeline assembly 4 includes a second pipeline 41 and a second valve 42. The second pipeline is connected to the outlet of the screw pump 1 and is used to deliver the experimental medium pumped by the screw pump 1. The second valve is installed on the second pipeline and is used to adjust the flow of the experimental medium in the second pipeline. The second valve can be a manual valve, or the second valve can be an electromagnetic control valve connected to the control terminal 6, and the opening of the second valve can be adjusted through the control terminal 6.

[0050] Further, the experimental device further includes a pressure gauge 7. The pressure gauge 7 is installed on the second pipeline assembly 4 and is used to measure the medium pressure of the experimental medium in the second pipeline assembly 4. The measurement range of the pressure gauge 7 is determined according to the pressure extreme value that the second pipeline assembly 4 can withstand, to ensure that the experimental medium pressure can be accurately measured. The pressure gauge 7 can be a mechanical pressure gauge, and the pressure gauge 7 can be installed through the clamp 10. Of course, the pressure gauge 7 can also be a digital pressure gauge connected to the control terminal 6 to transmit the measured medium pressure to the control terminal 6. The digital pressure gauge can measure the pressure of the experimental medium during the experiment and can transmit the pressure data to the control terminal 6 in real time.

[0051] It should be noted that when the flow stability experiment of the screw pump 1 is performed, the delivery pressure of the outlet of the screw pump 1 can be determined through the pressure gauge 7, the delivery pressure of the outlet of the screw pump 1 can be configured to a preset value, and the flow data collected by the flow meter 5 under this working condition can be obtained, and the stability of the screw pump 1 under the corresponding operating parameters can be determined through the flow data. The stability can be characterized by a flow curve, which is a curve of the output flow of the outlet of the screw pump 1 varying with time under the preset value of the delivery pressure.

[0052] In practical application, the coaxiality of the motor and the screw pump 1 directly affects the running state of the two, and if improperly installed, the accuracy of experimental data can be insufficient. Based on this, in a specific embodiment, the motor is configured as a servo motor; the experimental device further includes a universal joint 8. One end of the universal joint 8 is connected to the screw pump 1, and the other end is connected to the servo motor. The universal joint 8 can reduce the installation requirements of the servo motor and the screw pump 1, thereby reducing the error caused by the eccentricity of the rotor of the screw pump 1 and improving the accuracy of the experimental data.

[0053] For example, the control terminal 6 includes a controller 61 and a host computer 62. The control port of the controller is connected to the motor, and the data output port of the controller is connected to the flowmeter 5. The host computer is connected to the communication port of the controller, and the running parameters of the motor can be configured and the flow data can be obtained through the host computer. The host computer can be a computer, and when the running parameter is the rotating speed, a graph of the flow rate with time under constant pressure and rotating speed can be output on the computer to measure the real-time flow rate and flow rate stability of the screw pump 1.

[0054] The technical scheme provided in the embodiment of the utility model has at least the following technical effects or advantages:

[0055] The experimental device includes a screw pump, a motor, a first pipeline assembly, a second pipeline assembly, a flowmeter and a control terminal. The motor is connected to the screw pump and is used to drive the screw pump to rotate. The first pipeline assembly is connected to the inlet of the screw pump and is used to deliver experimental medium to the screw pump at a constant pressure. The second pipeline assembly is connected to the outlet of the screw pump and is used to deliver the experimental medium pumped by the screw pump. The flowmeter is installed on the second pipeline assembly and is used to measure the flow rate of the experimental medium output by the second pipeline assembly and output externally. The control terminal is connected to the motor and the flowmeter and is used to configure the running parameters of the motor and receive the flow data output by the flowmeter when the screw pump is driven by the running parameters. The utility device can drive the screw pump to run based on the configured running parameters, implement the stability experiment of the screw pump through the flow data measured by the flowmeter, and thus the flow control precision of the screw pump can be improved in actual control.

[0056] Although the preferred embodiments of the utility model have been described, those skilled in the art can make further changes and modifications to the embodiments once they know the basic inventive concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the utility model.

[0057] Obviously, those skilled in the art can make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application also intends to include these modifications and variations.

Claims

1. An experimental apparatus for a screw pump, characterized in that, The device includes: Screw pump; An electric motor is connected to the screw pump, and the electric motor is used to drive the screw pump to rotate; A first piping assembly is connected to the inlet of the screw pump, and the first piping assembly is used to deliver the experimental medium to the screw pump at a constant pressure; The second pipeline assembly is connected to the outlet of the screw pump and is used to transport the experimental medium pumped by the screw pump to the outside. A flow meter is installed on the second pipeline assembly. The flow meter is used to measure the flow rate of the experimental medium output by the second pipeline assembly and output it externally. A control terminal is connected to both the motor and the flow meter. The control terminal is used to configure the operating parameters of the motor and to receive the flow data output by the flow meter when the screw pump is driven by the operating parameters.

2. The experimental apparatus for the screw pump according to claim 1, characterized in that, The first piping assembly includes: A first pipeline is connected to the inlet of the screw pump, and the first pipeline is used to deliver the experimental medium to the screw pump; The first valve is installed on the first pipeline and is used to regulate the flow rate of the experimental medium in the first pipeline.

3. The experimental apparatus for the screw pump according to claim 2, characterized in that, The first valve is an overflow valve, which is connected to a preset storage tank, which is used to store experimental media.

4. The experimental apparatus for the screw pump according to claim 3, characterized in that, The storage pool is connected to the outlet of the second pipeline assembly to create a circulation path for the experimental medium in the experimental apparatus.

5. The experimental apparatus for the screw pump according to claim 1, characterized in that, The second piping assembly includes: The second pipeline is connected to the outlet of the screw pump and is used to transport the experimental medium pumped by the screw pump to the outside. The second valve is installed on the second pipeline and is used to regulate the flow rate of the experimental medium in the second pipeline.

6. The experimental apparatus for the screw pump according to claim 5, characterized in that, The second valve is an electromagnetic control valve, which is connected to the control terminal.

7. The experimental apparatus for the screw pump according to claim 1, characterized in that, The device further includes: A pressure gauge is installed on the second pipeline assembly and is used to measure the pressure of the experimental medium in the second pipeline assembly.

8. The experimental apparatus for the screw pump according to claim 7, characterized in that, The pressure gauge is a digital pressure gauge, which is connected to the control terminal to send the measured medium pressure to the control terminal.

9. The experimental apparatus for the screw pump according to claim 1, characterized in that, The motor is a servo motor; the device also includes: A universal coupling, one end of which is connected to the screw pump and the other end of which is connected to the servo motor.

10. The experimental apparatus for the screw pump according to claim 1, characterized in that, The control terminal includes: A controller, the control port of which is connected to the motor, and the data output port of which is connected to the flow meter; The host computer is connected to the communication port of the controller.

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