CN216208212U - Automatic pressure testing device - Google Patents

Abstract

Automatic pressure testing device, including pressure sensor, the overflow valve, motor speed driver and controller, pressure sensor and overflow valve set up on the pressure output pipeline, the overflow valve is located pressure sensor's upstream side, the aperture can be controlled by control signal, motor speed driver electricity connects the motor, the controller provides man-machine interaction interface, be used for the input test parameter, signal connection pressure sensor, motor speed driver and overflow valve, the controller provides man-machine interaction interface, be used for the input output test parameter, signal transmission control command to motor speed driver and overflow valve according to input test parameter and pressure sensor output, above-mentioned automatic pressure testing device can realize the immediate control to the speed of stepping up in the pressure testing, and is simple in operation and safe in equipment.

Description

Automatic pressure testing device

Technical Field

The utility model relates to the field of pressure measurement, in particular to the field of automatic pressure testing devices.

Background

Chinese patent application No. CN201820324307.0 discloses a pipeline pressure testing device, which comprises an electric pressure testing pump, an automatic exhaust valve, a communicating pipe, a faucet, a high-pressure hose, a first pressure gauge, a second pressure gauge, a control valve, and the like. The device injects water to the system through the bypass where the faucet is located, and injects water to the equipment to be detected after the pressure of the system is increased to the test pressure through the pressure test pump. In the test process, the pressure of the system is monitored through a pressure gauge, manual intervention is realized through a manually operated valve, a pressure test pump is started and stopped, and the control of the pressure of the system is achieved.

However, the pressure test using the pipeline pressure test device has the following problems:

firstly, the system has more pipelines, elements, equipment and the like, is inconvenient to assemble and disassemble on site, and has poor applicability;

secondly, the boosting rate is not easy to control, the boosting device of the pressure test loop adopts an electric pressure test pump, the electric pressure test pump has no pressure regulation control function, no pressure feedback element in the system is matched with the pressure test pump for boosting, the boosting rate can be regulated only by methods of adding a drainage point in the system and the like, and the accurate boosting rate control is difficult to realize;

thirdly, the safety is not high, elements such as an overflow valve and the like are not arranged in the system, the highest test pressure cannot be set, and when the system pressure is too high, a valve needs to be manually operated to release the pressure, so that the safety is relatively low;

fourthly, the degree of automation is not high, no relevant monitoring element and automatic control software exist in the system, and real-time monitoring and recording of the pressure cannot be realized;

fifthly, the pressure range is not wide, the pressure range of a pressure test pump in the pressure test system is limited, the pressure does not exceed 1.2Mpa, and the pressure test in a small pressure range can only be realized.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide an automatic pressure test device which can realize the instant control and the accurate adjustment of the pressure increasing rate in a pressure test experiment.

The automatic pressure testing device for achieving the purpose comprises a liquid container, a pump body, a motor, a pressure output pipeline, a pressure sensor, an overflow valve, a motor speed driver and a controller.

The pump body is connected with the liquid container through a pipeline; the motor is used for driving the pump body to pump the liquid in the liquid container; the pressure output pipeline is connected with the outlet of the pump body and is also used for connecting a part to be tested; the pressure sensor is arranged on the pressure output pipeline and used for detecting the pressure output to the part to be tested; the overflow valve is arranged on the pressure output pipeline, the opening degree of the overflow valve can be controlled by a control signal, and the overflow valve is positioned on the upstream side of the pressure sensor; the motor speed driver is electrically connected with the motor; the controller provides a human-computer interaction interface for inputting and outputting test parameters, is in signal connection with the pressure sensor, the motor speed driver and the overflow valve, and sends a control command to the motor speed driver and the overflow valve according to the input test parameters and signals fed back by the pressure sensor.

In one or more embodiments, the pump body is a high pressure plunger pump, and the hydraulic pressure in the pressure output line is in the range of-Mpa.

In one or more embodiments, a pre-pump is disposed between the liquid reservoir and the high pressure plunger pump.

In one or more embodiments, the liquid container includes an electric block valve in signal connection with the controller and a liquid level meter.

In one or more embodiments, the motor speed driver is a frequency converter, and receives a control command from the controller to adjust the rotation speed of the motor.

In one or more embodiments, a control box is disposed between the motor speed drive and the motor, the control box including a manual emergency stop switch, a manual switch, and an automatic switch.

In one or more embodiments, a multi-stage filter is disposed between the liquid container and the pump body.

In one or more embodiments, a flow equalizer is disposed between the pressure output line and the pump body.

In one or more embodiments, the overflow valve is provided with a return pipe, which is connected to the liquid reservoir.

In one or more embodiments, all the automatic pressure testing devices are arranged in a closed integrated device, and the outer side of the closed integrated device is provided with a liquid inlet interface communicated with the liquid container, a power interface connected with the motor, a liquid outlet interface connected with the pressure output pipeline and a window for displaying a human-computer interaction interface.

The automatic pressure test device outputs pressure data to the controller in real time through the pressure sensor, and then the controller sends a control command to the motor speed driver and the overflow valve, and the motor speed driver can realize real-time adjustment of the rotating speed of the motor so as to improve the pressure control precision of the pump body; the opening degree of the overflow valve can be dynamically adjusted along with a control instruction so as to provide stable pressure and prevent overpressure of the system; the synchronous adjustment of the motor speed driver and the overflow valve can effectively realize the instant adjustment of the pressure boosting rate of the automatic pressure test device in the pressure boosting process, and realize the accurate control of the pressure boosting rate; the whole device realizes the automatic and integrated control of the test process, saves the manpower input and improves the test efficiency.

Drawings

The above and other features, properties and advantages of the present invention will become more apparent from the following description of the embodiments with reference to the accompanying drawings, in which:

FIG. 1 is a schematic view of one embodiment of an automatic pressure testing device.

Fig. 2 is a schematic view of another embodiment of an automatic pressure testing device.

Description of the symbols

1 inlet flange

2 electric block valve

3 liquid level meter

4 liquid container

5 liquid level meter

6 first-stage filter

7 front pump

8 two-stage filter

9 three-stage filter

10 pump body

11 flow equalizer

12 overflow valve

13 pressure sensor

14 safety valve

15 high pressure gauge

16 low pressure gauge

17 electric machine

18 control box

19 motor speed driver

20 controller

21 pressure output pipeline

22 return pipe

23 parts to be tested

24 pipeline

Detailed Description

The present invention is further described in the following description with reference to specific embodiments and the accompanying drawings, wherein the details are set forth in order to provide a thorough understanding of the present invention, but it is apparent that the present invention can be embodied in many other forms different from those described herein, and it will be readily appreciated by those skilled in the art that the present invention can be implemented in many different forms without departing from the spirit and scope of the utility model.

It is noted that these and other figures which follow are merely exemplary and not drawn to scale and should not be considered as limiting the scope of the utility model as it is actually claimed.

As shown in fig. 1, the automatic pressure testing device includes a liquid container 4, a pump body 10, a pressure output pipe 21, and a motor 17.

The liquid container 4 is used for containing a medium required for a pressure test, and the medium includes but is not limited to water. Preferably, the liquid container 4 is made of a stainless steel plate with a thickness of 3mm by welding, and the effective volume of the liquid container 4 is 1.5m in consideration of the requirement of the automatic pressure testing device to be easy to move³。

The pump body 10 is connected with the liquid container 4 through a pipeline 24, and the motor 17 is used for driving the pump body 10 to pump the liquid in the liquid container 4. The pressure output pipeline 21 is connected with the outlet of the pump body 10, and the other end of the pressure output pipeline is used for connecting a part to be tested 23, such as a pipeline and other equipment.

The liquid medium in the liquid container 4 is pumped by the pump body 10 and then enters the pressure output pipeline 21, and then enters the part to be tested 23 through the pressure output pipeline 21, so that the part to be tested 23 is subjected to pressure test, and whether the part to be tested 23 can bear the designed pressure-resistant parameters is checked.

In order to realize accurate control of the pressure increasing rate and full automation of the pressure testing process in the pressure testing test, the pressure testing device further comprises a pressure sensor 13, an overflow valve 12, a motor speed driver 19 and a controller 20.

Both the pressure sensor 13 and the relief valve 12 are provided on the pressure output line 21, and the relief valve 12 is located on the upstream side of the pressure sensor 13. The pressure sensor 13 is used for detecting the pressure output to the part to be tested 23 and outputting the pressure to the controller 20 in real time, and the opening degree of the overflow valve 12 can be controlled by a control signal.

Preferably, the overflow valve 12 is provided with a servo motor, and the servo motor receives a control instruction of the controller 20 to dynamically adjust the opening of the overflow valve. The overflow valve 12 can ensure the safety and controllability of the test process, and after the test pressure is reached, redundant pressure flows back to the water tank through the overflow valve, so that the overpressure of the system is prevented.

The motor speed driver 19 is electrically connected to the motor 17 for adjusting the rotational speed of the motor 17. The controller 20 provides a human-machine interface for inputting output test parameters.

For example, a pressure test button is started by one key on a human-computer interaction interface or the human-computer interaction interface displays design parameters such as the maximum pressure value, the maximum boosting rate, the maximum pressure stabilizing time or the maximum liquid level in a liquid container of each component in the automatic pressure testing device, so that the whole pressure testing process is completely displayed, and the automatic control of the testing process is realized.

Preferably, the controller 20 is a PLC terminal and a computer terminal, the computer terminal has a man-machine interaction interface, and the PLC terminal is used for receiving a feedback signal or sending a command signal. The controller 20 in the art includes, but is not limited to, the above-described embodiment, and may be a highly integrated industrial control computer or the like.

The controller 20 is in signal connection with the pressure sensor 13, the motor speed driver 19 and the overflow valve 12, and the controller 20 can send a control command to the motor speed driver 19 and the overflow valve 12 according to the input test parameters and the signal fed back by the pressure sensor 13: the motor speed driver 19 can realize real-time adjustment of the rotating speed of the motor 17 after receiving the control instruction so as to improve the pressure control precision of the pump body 10; after the overflow valve 12 receives the control instruction, the opening degree can be adjusted in time to ensure that the pressure output pipeline 21 has stable hydraulic pressure, and the control of the pressure increasing rate can be realized in the pressure increasing process, so that the test data is stable.

In the test process, the servo motor 17 and the overflow valve 12 are continuously finely adjusted through the pressure value fed back by the pressure sensor 13, so that the whole boosting process is stable, the curve is smooth, and the condition that the pressure fluctuates in a large range is avoided.

In one embodiment of the automatic pressure test device shown in fig. 2, the overflow valve 12 is provided with a return pipe 22, the return pipe 22 being connected to the liquid reservoir 4. When the overflow valve 12 regulates the hydraulic pressure in the pressure output pipeline 21, the liquid overflowing from the overflow valve 12 can flow back to the liquid container 4 through the return pipe 22, so that the pressure testing liquid can be reused, and the waste is reduced.

In one embodiment, the pump body 10 is a high pressure plunger pump that can provide high pressure, such that the pressure in the pressure output line 21 ranges from 0 to 80 Mpa. Compare traditional pressure testing device, 80 Mpa's maximum pressure testing pressure can make pressure testing device be applied to more various parts 23 that await measuring, enlarges the application object, has the commonality, especially to nuclear power construction, and 80Mpa can satisfy all pipeline pressure test demands almost.

Preferably, the high-pressure plunger pump is a Planet force SH26 type high-pressure plunger pump, the flow rate is 72L/min, and the maximum pressure is 80 MPa. The high-pressure plunger pump is provided with a safety valve 14, a high-pressure gauge 15 and a low-pressure gauge 16, the high-pressure gauge 15 is used for displaying the pressure of the outlet of the high-pressure plunger pump, and the low-pressure gauge 16 is used for displaying the pressure of the inlet of the high-pressure plunger pump.

Referring to fig. 2, on the basis of the above embodiment, the pre-pump 7 is arranged between the liquid container 4 and the high-pressure plunger pump, and the pre-pump 7 can initially pressurize the liquid in the liquid container 4 to 0.5-1.6MPa to provide the starting pressure for the high-pressure plunger pump.

On the basis of the above embodiment, the flow equalizer 11 is arranged between the pressure output pipeline 21 and the high-pressure plunger pump, and the flow equalizer 11 plays a role of buffering, so that the outlet flow of the high-pressure plunger pump can be more stable, and the fluctuation of the pressure can be reduced.

A multi-stage filter is arranged between the liquid container 4 and the pump body 10 and is used to ensure that the liquid entering the pump body 10 is clean and to avoid impurities in the liquid from clogging the components in the automatic test set or the component 23 to be tested.

As shown in fig. 2, the filter is divided into three stages, a primary filter 6 is arranged in front of the pre-pump 7, a secondary filter 8 and a tertiary filter 9 are arranged between the pre-pump 7 and the pump body 10, the secondary filter 8 and the tertiary filter 9 are provided with exhaust valves, and the multi-stage distribution filter ensures that impurities with various sizes existing in the liquid are filtered out in the test process.

The liquid container 4 includes an electric shut-off valve 2 and a liquid level meter 5. The liquid container 4 is provided with a liquid level meter 5, and the liquid level meter 5 is provided with a liquid level transmitter (not shown in the figure), and the liquid level transmitter can feed back the liquid level information in the liquid container 4 to the controller 20.

An electric block valve 2 is arranged at the inlet of the liquid container 4, the electric block valve 2 is connected with the inlet flange 1, and the electric block valve 2 can be connected with a control command of the controller 20 to realize the supply or pause supply of the liquid in the liquid container 4.

The inlet of the liquid container 4 is also provided with a liquid level meter 3, and the liquid level meter 3 is used for counting the usage amount of liquid in the liquid container 4.

Preferably, the electric shutoff valve 2 is an electric ball valve, and the supply or shutoff of the liquid in the liquid container 4 is realized. The electric shut-off valve 2 includes, but is not limited to, the above-described embodiment, and other types of valves such as a shut-off valve, a butterfly valve, and a plug valve may be selected as long as they can shut off the fluid.

In one embodiment, the motor speed drive 19 is a frequency converter that receives control commands from the controller 20 to regulate the rotational speed of the motor 17. The frequency converter can stably and continuously change the rotating speed of the motor 17 by adjusting the power frequency of the input motor 17, thereby realizing the accurate control of the boosting rate.

On the basis of the above-mentioned embodiment, a control box 18 is further provided between the motor speed driver 19 and the motor 17, and a manual emergency stop switch, a manual switch and an automatic switch (not shown in the figure) are provided on the control box 18.

After the control box 18 is switched to the automatic switch, the automatic pressure testing device operates along with the instruction of the controller 20, and after the control box 18 is switched to the manual switch, the automatic pressure testing device needs to operate along with the manual operation. Under emergency, the emergency stop switch can be used for emergency stop through emergency control of the control box, so that danger in a pressure test is avoided.

The automatic pressure testing devices shown in fig. 2 are all arranged in a closed integrated device (not shown in the figure), so that the integration of the testing device is realized, and the field assembly, disassembly and transportation are convenient.

The outer side of the closed integrated device is provided with a liquid inlet interface communicated with the liquid container 4, a power supply interface connected with the motor 17, a liquid outlet interface connected with the pressure output pipeline 21 and a window used for displaying a human-computer interaction interface on the controller 20.

During the experiment, only need in advance experimental pressure, rise and fall the pressure rate, pressure platform and steady voltage time input human-computer interaction interface, the implementation record of each parameter of relevant monitoring element among the human-computer interaction interface alright display system afterwards, consequently when carrying out system pressure test, testing arrangement department only need alone in terminal monitoring test process can, need not other personnel cooperations, the human input has been practiced thrift, in addition, the test process is progressively gone on according to the procedure that has stipulated, do not have and be interrupted and redundant step, the efficiency of the test has also been improved, the automated control of experimental overall process has been realized.

Preferably, the liquid inlet interface, the liquid outlet interface and the power supply interface are all connected with a standard connector, and the standardized interface can be quickly connected with the part to be tested 23, so that the device is suitable for various scenes and has strong applicability.

Preferably, the liquid inlet interface of the liquid container 4 can be connected by a flange, the power inlet interface is a standard power distribution interface, and the liquid outlet interface of the pressure output pipeline 21 is an 1/2' NPT standard pipe threaded interface and is connected with a component to be tested by a quick connector and a high-pressure hose.

The operation method of the automatic pressure testing device will be described below.

When the pressure testing device is used, a power supply is connected with a power supply interface of the connecting motor 17, a storage tank for testing liquid is connected with a liquid inlet interface of the liquid container 4, a high-pressure hose and a quick connector are used for connecting a liquid outlet interface of the pressure output pipeline 21 with a component to be tested, design parameters such as pressure, boosting rate, pressure platform, voltage stabilizing time and the like of the test are input on a man-machine interaction interface on the controller 20, and an operation mode on the control box 18 is set to be an automatic switch.

Whether the liquid level in the liquid container 4 is in a safe range is detected by a value fed back from the liquid level meter 5 on the control box 18. If the liquid level in the liquid container 4 is within the safe range, a pressure test is started.

After the pressure test begins, the automatic pressure test device can automatically perform the pressure test, the control box 18 can automatically record the dynamic test data of each part, if the pressure boosting rate is too fast, the control box 18 sends out an adjusting signal to the motor speed driver 19 and the overflow valve 12, and the stability of the pressure boosting rate is ensured.

And after the pressure test is finished, clicking a stop interface on the control box 18 to finish the test. And finally, disconnecting the power supply and the liquid supply source, and disconnecting the pressure output pipeline 21 from the component to be tested after the system pressure relief is completed.

If the device is applied to the hydrostatic test of the condensed water expansion system, the pressure test is carried out on 3 pressure platforms, and the test pressures are respectively; 2MPa, 5.06MPa and 4 MPa.

Setting pressure test parameters on a human-computer interface of a controller, wherein the first pressure platform is 2MPa, the boosting rate is 0.3MPa/min, the highest pressure is 2.1MPa, and the pressure maintaining time is 10 min; the second pressure platform is 5.06MPa, the pressure increasing rate is 0.3MPa/min, the highest pressure is 5.1MPa, and the pressure maintaining time is 10 min; the third pressure platform is 4MPa, the pressure reduction rate is 0.4MPa/min, the highest pressure is 4.1MPa, and the pressure maintaining time is 30 min.

And then, starting pressure test by one key, monitoring the pressure state of the system in the whole process by the controller, and recording a pressure curve. And each pressure platform performs pressure stabilization according to set pressure maintaining time, whether the part 23 to be tested has leakage condition or not is checked during the pressure maintaining period, and the test is completed if the requirement is met.

The automatic pressure test is convenient for on-site arrangement and transportation, and can be widely applied to various construction sites. The pressure test can be carried out only by connecting the power supply, the liquid supply source and the component to be tested through the standard connector, so that the field arrangement is convenient, and the labor cost is greatly saved; meanwhile, the test process is automatically controlled to realize accurate control on the boosting rate, so that stable test data can be obtained and the safety of the test device is ensured; the high-pressure plunger pump can effectively increase the test pressure range, so that the automatic pressure testing device has good universality, and the problem that only small-pressure-range pressure testing can be realized is solved.

Although the present invention has been disclosed in terms of the preferred embodiment, it is not intended to limit the utility model, and variations and modifications may be made by one skilled in the art without departing from the spirit and scope of the utility model. Such as the number of stages of the filter, the hydraulic pressure range of the high-pressure plunger pump, or the number of relief valves. Therefore, any modification, equivalent change and modification of the above embodiments according to the technical essence of the present invention are within the protection scope defined by the claims of the present invention, unless the technical essence of the present invention departs from the content of the present invention.

Claims (10)

1. An automatic pressure testing device comprising:

a liquid container (4);

the pump body (10) is connected with the liquid container (4) through a pipeline;

a motor (17) for driving the pump body (10) to pump the liquid in the liquid container (4);

the pressure output pipeline (21) is connected with the outlet of the pump body (10) and is also used for connecting a part to be tested (23); its characterized in that, this automatic pressure testing device still includes:

a pressure sensor (13) provided in the pressure output line (21) for detecting a pressure output to a part to be tested (23);

an overflow valve (12) provided in the pressure output line (21), the opening of which is controllable by a control signal, and located upstream of the pressure sensor (13);

a motor speed driver (19) electrically connected to the motor (17);

and the controller (20) is used for providing a man-machine interaction interface and inputting and outputting test parameters, is in signal connection with the pressure sensor (13), the motor speed driver (19) and the overflow valve (12), and sends a control command to the motor speed driver (19) and the overflow valve (12) according to the input and output test parameters and signals fed back by the pressure sensor (13).

2. The automatic pressure test device according to claim 1, characterized in that the pump body (10) is a high-pressure plunger pump, and the hydraulic pressure in the pressure output line (21) is in the range of 0-80 Mpa.

3. Automatic pressure test device according to claim 2, characterized in that a pre-pump (7) is arranged between the liquid container (4) and the high-pressure plunger pump.

4. The automatic pressure test device according to claim 1, characterized in that the liquid container (4) comprises an electric shut-off valve (2) and a level gauge (5), the electric shut-off valve (2) being in signal connection with the controller (20).

5. The automatic pressure test apparatus according to claim 1, wherein the motor speed driver (19) is a frequency converter, and receives a control command from the controller (20) to adjust the rotation speed of the motor (17).

6. The automatic pressure test device according to claim 5, characterized in that a control box (18) is provided between the motor speed driver (19) and the motor (17), the control box (18) comprising a manual emergency stop switch, a manual switch and an automatic switch.

7. The automatic pressure test device according to claim 1, characterized in that a multi-stage filter is provided between the liquid container (4) and the pump body (10).

8. The automatic pressure test device according to claim 1, characterized in that a flow equalizer (11) is provided between the pressure outlet line (21) and the pump body (10).

9. The automatic pressure test device according to claim 1, characterized in that the overflow valve (12) is provided with a return pipe (22), the return pipe (22) being connected to the liquid container (4).

10. The automatic pressure test device according to any one of claims 1 to 9, wherein the automatic pressure test device is entirely built in a sealed integrated device, and a liquid inlet port communicated with the liquid container (4), a power supply port connected with the motor (17), a liquid outlet port connected with the pressure output pipeline (21), and a window for displaying a human-computer interaction interface are arranged outside the sealed integrated device.

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