Automated test system and method for overpressure shutdown of shutdown valve

Abstract

An automated test system and method for the overpressure shutdown of a shutdown valve (100). The system comprises a shutdown valve (100) connection port, used for connecting to a shutdown valve (100) under test; an electric valve group, comprising a first electric valve (210) used for regulating a first air pressure between the shutdown valve (100) and the first electric valve (210); a sensing device, used for acquiring air pressure data and measuring shutdown air pressure data when the shutdown valve (100) shuts down; and an external reset device, used for resetting the shutdown valve (100). The method comprises: opening the first electric valve (210), and supplying air between the first electric valve (210) and the shutdown valve (100) until the shutdown valve (100) shuts down; by means of the external reset device, resetting the shutdown valve (100); and repeating such processes until a preset amount of shutdown air pressure data is acquired. Controlling the external reset device to automatically reset the shutdown valve (100) can stably and efficiently execute test actions with high repeatability and high stability.

Description

A shut-off valve overpressure shut-off automatic testing system and method Technical Field

[0001] The present invention relates to a gas safety test, in particular to a cut-off valve overpressure cut-off automatic test system and method. Background Art

[0002] Gas safety shut-off valves are valves installed in gas transmission and distribution system pipelines or devices. They remain open during normal system operation and automatically and completely shut off the gas flow in the event of an accident or malfunction. Manual reset is required on-site after the fault is corrected. These valves primarily include self-operated shut-off valves (SSDs), which use pipeline gas as their control energy source and operate without any external power source, and externally operated shut-off valves (ASDs), which are directly or indirectly operated by electromagnetic, electric, pneumatic, or mechanical means. These valves, referred to as "shut-off valves," operate immediately upon detection of a control system malfunction by a protective device, closing the shut-off valve to halt system operation and ensure a safe output. They remain open during normal system operation and automatically and completely shut off the gas flow in the event of an accident or malfunction, when the monitored gas system pressure reaches a set value (overpressure or underpressure). However, because shut-off valves can only be reset manually, factory testing of these valves is still primarily manual, resulting in a low level of automation and a failure to meet current shut-off valve production needs.

[0003] Summary of the Invention

[0004] In order to solve the technical problem that the factory test process of the cut-off valve is still mainly manual operation with a low degree of automation, which cannot meet the current demand for the production of cut-off valves, the present invention provides a cut-off valve overpressure cut-off automatic test system. The specific technical solution is as follows:

[0005] The present invention provides a shut-off valve overpressure shut-off automatic testing system, comprising a shut-off valve connection port for connecting the shut-off valve to be tested, and further comprising:

[0006] an electric valve assembly, the electric valve assembly including a first electric valve, the first electric valve pipeline being connected to the shut-off valve connection port and being used to adjust a first air pressure between the shut-off valve and the first electric valve; a sensing device for acquiring air pressure data, specifically including a first sensor, the first sensor being disposed between the first electric valve and the shut-off valve connection port and being used to measure shut-off air pressure data when the shut-off valve is shut off;

[0007] The external reset device is used to reset the shut-off valve after the shut-off valve is shut off.

[0008] In this technical solution, the switching valve is automatically reset by controlling the external reset device, so that the test action can be performed stably and efficiently with high repeatability and stability;

[0009] Preferably, one end of the shut-off valve is connected to the air inlet pipe, and the other end is connected to the air outlet pipe; the air inlet pipe extends toward the first electric valve to form an air inlet branch.

[0010] Preferably, the electric valve group further includes a second electric valve, and the second electric valve is located between the shut-off valve and the first electric valve.

[0011] Preferably, the first electric valve is an electric proportional valve;

[0012] Preferably, the first electric valve is located on the intake branch line.

[0013] Preferably, the electric valve group further includes a third electric valve; the third electric valve is connected to a pipeline between the second electric valve and the shut-off valve;

[0014] When the test is completed, the second electric valve is closed and the third electric valve is opened to discharge the gas in the pipeline between the second electric valve and the cut-off valve.

[0015] Further preferably, the external reset device includes a telescopic device, and when the telescopic device is extended, a reset button of the shut-off valve is pressed to reset the shut-off valve.

[0016] Preferably, the telescopic device includes a motor or a cylinder.

[0017] Preferably, it further comprises an intake pipe switching device for switching the intake pipe connected to the shut-off valve;

[0018] The sensing device specifically further includes a second sensor and a third sensor;

[0019] The second sensor is used to detect low-pressure air pressure data of a low-pressure air intake pipe connected to the shut-off valve;

[0020] The third sensor is used to detect high-pressure air pressure data of the high-pressure intake pipe connected to the shut-off valve.

[0021] Preferably, the sensing device further includes a fourth sensor for detecting outlet air pressure data of an outlet pipe connected to the shut-off valve.

[0022] In this preferred technical solution, air tightness and the like can be tested on the basis of taking the cut-off test into consideration.

[0023] Preferably, it also includes a controller and a human-computer interaction device;

[0024] The human-machine interaction device is used to receive a human-machine interaction instruction and send the human-machine interaction instruction to the controller to control the operation of the electric valve group and the external reset device;

[0025] The controller is further configured to receive air pressure data transmitted by the sensor device and transmit the air pressure data to the human-computer interaction device.

[0026] In this preferred technical solution, the controller and the human-computer interaction device are used to facilitate data recording, and timely reminders and alarms are given; the test data can be automatically and accurately picked up according to the signal and the data can be calculated to obtain the final test data.

[0027] In another aspect, a method for automatically testing a shut-off valve overpressure cutoff is provided, using the shut-off valve overpressure cutoff automatic testing system, comprising:

[0028] Opening the first electric valve and ventilating air between the first electric valve and the shut-off valve until the shut-off valve is shut off, and reading the shut-off air pressure data when the shut-off valve is shut off;

[0029] Resetting the shut-off valve by the external resetting device;

[0030] The above process is repeated until a preset amount of cut-off air pressure data is obtained.

[0031] Preferably, before the shut-off valve is shut off, the method further includes: when the first air pressure reaches the preset air pressure, opening the second electric valve until the shut-off valve is shut off.

[0032] Preferably, the method further comprises: when the shut-off valve is shut off, closing the first electric valve and the second electric valve, and opening the third electric valve to discharge the gas in the pipeline between the second electric valve and the shut-off valve.

[0033] The present invention includes at least one of the following technical effects:

[0034] 1. By controlling the external reset device to automatically reset the switching valve, the test action can be performed stably and efficiently with high repeatability and stability;

[0035] 2. On the basis of taking into account the cut-off test, the air tightness test can be carried out;

[0036] 3. Through the controller and human-computer interaction device, data recording is convenient, and timely reminders and alarms are provided;

[0037] 4. The test data can be automatically and accurately picked up according to the signal and the data calculation is performed to obtain the final test data. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0039] FIG1 is a schematic diagram of the system structure of Example 1 of the present invention;

[0040] FIG2 is a schematic diagram of the interface of the human-computer interaction device of the present invention;

[0041] FIG3 is a flow chart of embodiment 4 of the present invention. Shut-off valve 100; first electric valve 210; second electric valve 220; third electric valve 230; first sensor 310; second sensor 320; third sensor 330; fourth sensor 340; intake pipe switching device 400; DETAILED DESCRIPTION

[0042] In the following description, specific details such as specific system structures and technologies are provided for illustration rather than limitation to facilitate a thorough understanding of the embodiments of the present application. However, it should be clear to those skilled in the art that the present application may be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to avoid obstructing the description of the present application with unnecessary details.

[0043] It will be understood that when used in this specification and the appended claims, the term "comprising" indicates the presence of the described features, integers, steps, operations, elements and / or components, but does not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or collections.

[0044] To simplify the drawings, only the parts relevant to the present invention are schematically depicted in each figure; they do not represent the actual structure of the product. Furthermore, to simplify the drawings and facilitate understanding, in some figures, only one component with the same structure or function is schematically depicted or labeled. As used herein, "one" refers not only to "only one" but also to "more than one."

[0045] It should be further understood that the term "and / or" used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.

[0046] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0047] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the specific embodiments of the present invention will be described below with reference to the accompanying drawings. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings and other embodiments can be obtained based on these drawings without inventive work.

[0048] Example 1:

[0049] This embodiment provides a shut-off valve overpressure shut-off automatic testing system, including a shut-off valve 100 connection port for connecting the shut-off valve 100 to be tested, and further comprising:

[0050] An electric valve assembly, the electric valve assembly comprising a first electric valve, the first electric valve pipeline being connected to the connection port of the shut-off valve 100 and being used to adjust a first air pressure between the shut-off valve 100 and the first electric valve; the first electric valve being an electric proportional valve;

[0051] A sensing device for obtaining air pressure data, specifically comprising a first sensor 310 , which is disposed between the first electric valve 210 and the connection port of the shut-off valve 100 and is used to measure shut-off air pressure data when the shut-off valve 100 is shut off;

[0052] The external resetting device is used to reset the shut-off valve 100 after the shut-off valve 100 is shut off.

[0053] Gas safety shut-off valves are valves installed in gas transmission and distribution system pipelines or devices. They remain open during normal system operation and automatically and completely shut off the gas flow in the event of an accident or malfunction. Manual reset is required on-site after the fault is corrected. These valves primarily include self-operated shut-off valves (SSDs), which use pipeline gas as their control energy source and operate without any external power source, and externally operated shut-off valves (ASDs), which are directly or indirectly operated by electromagnetic, electric, pneumatic, or mechanical means. These valves, referred to as "shut-off valves," operate immediately upon detection of a control system malfunction by a protective device, closing the shut-off valve to halt system operation and ensure a safe output. They remain open during normal system operation and automatically and completely shut off the gas flow in the event of an accident or malfunction, when the monitored gas system pressure reaches a set value (overpressure or underpressure). However, because shut-off valves can only be reset manually, factory testing of these valves is still primarily manual, resulting in a low level of automation and a failure to meet current shut-off valve production needs.

[0054] Therefore, in this embodiment, an automated method is used to replace the original manual operation to improve efficiency. Specifically, during the factory test of the shut-off valve 100, the shut-off valve 100 is assembled to the shut-off valve connection port, and then air is ventilated to the shut-off valve 100 through the first electric valve 210 to increase the air pressure between the first electric valve 210 and the shut-off valve 100. As a result, the air pressure between the first electric valve 210 and the shut-off valve 100 continues to increase until the shut-off valve 100 is shut off. The sensor disposed between the first electric valve 210 and the shut-off valve 100 transmits the shut-off air pressure data when the shut-off valve 100 is shut off to the computer system, thereby obtaining the corresponding parameters.

[0055] This embodiment controls the external reset device to automatically reset the switching valve, thereby stably and efficiently executing the test action with high repeatability and stability.

[0056] Preferably, one end of the shut-off valve 100 is connected to the air inlet pipe, and the other end is connected to the air outlet pipe; the air inlet pipe extends toward the first electric valve 210 to form an air inlet branch.

[0057] In terms of specific gas supply, the pipeline method of the shut-off valve 100 during actual use is generally simulated, and a branch is directly separated from the main air intake line. The branch is connected to the air intake pipe, and air is supplied between the second electric valve 220 and the shut-off valve 100 through the air intake branch.

[0058] Preferably, the electric valve group further includes a second electric valve, which is located between the shut-off valve 100 and the first electric valve 210. The first electric valve 210 is an electric proportional valve; the first electric valve 210 is located on the intake branch.

[0059] At the same time, in order to achieve rapid pressurization, a second electric valve 210 is provided on the intake branch. Before conducting the cut-off test, the second electric valve 220 is first closed, and the air pressure between the first electric valve 210 and the second electric valve 220 is adjusted to a preset value through the first electric valve 210. Then, the second electric valve 220 is opened, and the air pressure is increased at an appropriate speed by continuing to adjust the electrical proportional valve. In this way, the air pressure between the second electric valve 220 and the cut-off valve 100 can be quickly adjusted to the cut-off pressure, so that the cut-off valve 100 is cut off, thereby reducing the time required for each test.

[0060] Preferably, the electric valve group further includes a third electric valve 230; the third electric valve 230 is connected to the pipeline between the second electric valve and the shut-off valve 100;

[0061] When the test is completed, the second electric valve is closed and the third electric valve 230 is opened to discharge the gas in the pipeline between the second electric valve and the shut-off valve 100 .

[0062] At the same time, after each test is completed and before the next experiment, the gas between the second electric valve 220 and the shut-off valve 100 needs to be discharged, so a branch is branched in the pipeline between the two to connect the third electric valve 230. After each test is completed, the gas in the pipeline is discharged through the third electric valve 230.

[0063] Further preferably, the external reset device includes a telescopic device. When the telescopic device is extended, the reset button of the shut-off valve 100 is pressed to reset the shut-off valve 100 . The telescopic device includes a motor or a cylinder.

[0064] In the specific external reset device, since the manual reset device of the shut-off valve 100 is generally a wrench or a reset button, the equipment requiring manual operation is provided with a telescopic device to pull the wrench or hit the reset button to achieve reset. Generally, a cylinder or a motor is used as the carrier of the telescopic device.

[0065] Example 2:

[0066] As shown in FIG1 , this embodiment, based on Embodiment 1, provides an automatic test system for overpressure shutoff of a shutoff valve, further comprising an intake pipe switching device 400 for switching the intake pipe connected to the shutoff valve 100; the sensing device 300 further comprising a second sensor 320 and a third sensor 330; the second sensor 320 for detecting low-pressure air pressure data of the low-pressure intake pipe connected to the shutoff valve 100; and the third sensor 330 for detecting high-pressure air pressure data of the high-pressure intake pipe connected to the shutoff valve 100. The sensing device 300 further comprises a fourth sensor 340 for detecting outlet air pressure data of the outlet pipe connected to the shutoff valve 100.

[0067] While testing the shutoff function of the shutoff valve 100, its air tightness and other parameters are also tested. Specifically, air pressure sensors are provided at the air inlet and outlet, respectively, to detect air leakage. If there is an air pressure difference between the second or third sensor 330 and the fourth sensor 340, it indicates that the shutoff valve 100 is leaking. At the same time, to test the shutoff valve 100 under different air pressure conditions, a low-pressure intake pipe and a high-pressure intake pipe are provided during the test process, and each is tested separately. Specifically, if the low-pressure intake pipe is tested first, the intake pipe switching device 400 is used to switch the pipe to the high-pressure intake pipe for a second test.

[0068] In an embodiment, air tightness and the like may be tested in addition to the cut-off test.

[0069] Example 3:

[0070] As shown in Figures 1 and 2, this embodiment provides an automatic test system for overpressure cutoff of a cutoff valve based on Example 1, and further includes a controller and a human-computer interaction device;

[0071] The human-machine interaction device is used to receive a human-machine interaction instruction and send the human-machine interaction instruction to the controller to control the operation of the electric valve group and the external reset device;

[0072] The controller is further configured to receive the air pressure data transmitted by the sensor device 300 and transmit the air pressure data to the human-computer interaction device.

[0073] In the specific settings of the controller and human-computer interaction device, a touch screen is generally used as the implementation method of the human-computer interaction device. The user obtains sensor information and controls each electric valve and reset device through the touch screen, and connects to the PLC board of the controller through a network cable to control the test process.

[0074] More specifically, the human-computer interaction device is installed as a whole in a dedicated operating table. A 15-inch touch screen is installed in the middle of the operating table for exposure. A keyboard and mouse are placed on the operating table. The user starts the test process by using the touch screen or keyboard and mouse as input devices. At this time, the test status will be displayed on the touch screen or other display devices. Generally speaking, if the parameters of each sensor are normal, the status of each electric valve is also normal, there is no emergency stop or alarm, and the interface will display a green light. The user then enters the preset value required for the shut-off valve 100 to shut off and starts the automated test process through the interface. During the test, the air pressure data transmitted by each sensor can be viewed through the interface to understand the conditions of various parts before and after the shut-off valve 100. At the same time, if there is a fault, the system will light up a red light and automatically stop the alarm. The same effect can also be achieved by the user manually pressing the emergency stop button. At the same time, when the test is completed, the human-computer interaction device will automatically calculate the shut-off pressure for these 6 times.

[0075] In this preferred technical solution, the controller and the human-computer interaction device are used to facilitate data recording, and timely reminders and alarms are given; the test data can be automatically and accurately picked up according to the signal and the data can be calculated to obtain the final test data.

[0076] Example 4:

[0077] As shown in Figures 1, 2, and 3, this embodiment provides a method for automatically testing a shut-off valve overpressure cutoff, using the shut-off valve overpressure cutoff automatic testing system, including:

[0078] S1: Open the first electric valve 210 and allow air to flow between the first electric valve 210 and the second electric valve 220 until the first air pressure between the first electric valve 210 and the second electric valve 220 reaches a preset pressure. At this time, the first electric valve 230, i.e., the electric proportional valve, increases the air pressure at an appropriate rate.

[0079] S2: When the first air pressure reaches the preset air pressure, the second electric valve 220 is opened to ventilate between the second electric valve 220 and the shut-off valve 100 until the shut-off valve 100 is shut off, and the shut-off air pressure data when the shut-off valve 100 is shut off is read;

[0080] S3: After the shut-off valve 100 is shut off, the first electric valve 210 and the second electric valve 220 are closed, and the third electric valve 230 is opened to discharge the gas in the pipeline between the second electric valve 220 and the shut-off valve 100 .

[0081] S4: Resetting the shut-off valve 100 through the external reset device;

[0082] S5: Determine whether the second electric valve 220 is in the closed state and whether the third electric valve 230 is in the closed state. If so, proceed to S6; otherwise, proceed to S7.

[0083] S6: The second electric valve 220 and the third electric valve 230 are closed.

[0084] S7: Whether the preset number of cut-off air pressure data are obtained, if not, return to S1.

[0085] Specifically, in this embodiment, the console is installed as a whole in a special operating table, and a 15-inch touch screen is installed in the middle of the operating table for exposed operation. A keyboard and mouse are placed on the operating table. The user starts the test process by using the touch screen or keyboard and mouse as input devices. At this time, the status of the test will be displayed on the touch screen or other display devices. Generally speaking, if the parameters of each sensor are normal, the status of each electric valve is also in a normal state, there is no emergency stop or alarm, and the interface will display a green light. The user then enters the preset value required for the shut-off valve 100 to be cut off, and starts the automated test process through the interface. During the test, the air pressure data transmitted by each sensor can be viewed through the interface to understand the conditions of various parts before and after the shut-off valve 100. At the same time, if there is a fault, the system will also light up a red light and automatically stop the alarm. At the same time, the user can manually press the emergency stop button to achieve this effect.

[0086] At this point, the system enters the automated operation phase and adjusts the electric proportional valve to 80% of the preset value. The first electric valve 230, also known as the electric proportional valve, then increases the air pressure at an appropriate rate. The second electric valve 220 is then opened, triggering the shutoff of the shutoff valve 100. Simultaneously with the shutoff, the system captures the pressure value detected by the first sensor 310 at the moment of shutoff based on the valve position signal from the shutoff valve 100, representing the shutoff pressure data. The second electric valve 220 is then closed, and the third electric valve 230 is opened to vent air, returning the electric proportional valve to 80% of the preset value. An external reset device, typically a pneumatic cylinder, is then used to press the reset button on the shutoff valve 100, returning the shutoff valve 100 to the open state. After the shutoff valve 100 is reset, the system determines whether the second and third electric valves 220 and 230 are closed. If not, they are closed. The test can also be paused between tests. After repeated multiple times, typically six times, the system automatically calculates the shutoff pressure for each of these six times.

[0087] Through the above embodiments, the present invention achieves:

[0088] 1. By controlling the external reset device to automatically reset the switching valve, the test action can be performed stably and efficiently with high repeatability and stability;

[0089] 2. On the basis of taking into account the cut-off test, the air tightness test can be carried out;

[0090] 3. Through the controller and human-computer interaction device, data recording is convenient, and timely reminders and alarms are provided;

[0091] 4. The test data can be automatically and accurately picked up according to the signal and the data calculation is performed to obtain the final test data.

[0092] Although the preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0093] Obviously, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if such changes and modifications fall within the scope of the claims and their equivalents, the present invention is intended to include such changes and modifications.

Claims

1. A cut-off valve overpressure cut-off automatic test system, comprising a cut-off valve connection port for connecting a cut-off valve to be tested, characterized in that: Also includes: An electric valve group, the electric valve group comprising a first electric valve, a pipeline of the first electric valve being connected to the connection port of the cut-off valve and being used for adjusting a first air pressure between the cut-off valve and the first electric valve; A sensor device, used for acquiring air pressure data, specifically comprising a first sensor, which is arranged between the first electric valve and the connection port of the cut-off valve and is used for measuring the cut-off air pressure data when the cut-off valve is cut off; The external resetting device is used to reset the cut-off valve after the cut-off valve is cut off.

2. The overpressure cut-off automatic test system for a cut-off valve according to claim 1, characterized in that: The electric valve group further includes a second electric valve located between the cut-off valve and the first electric valve.

3. The overpressure cut-off automatic test system for a cut-off valve according to claim 2, characterized in that: The electric valve group further includes a third electric valve; the third electric valve is connected to a pipeline between the second electric valve and the cut-off valve; When the test is completed, the second electric valve is closed and the third electric valve is opened to discharge the gas in the pipeline between the second electric valve and the cut-off valve.

4. The overpressure cut-off automatic test system for a cut-off valve according to claim 1, characterized in that: The external resetting device comprises a telescopic device. When the telescopic device is extended, a reset button of the cut-off valve is pressed to reset the cut-off valve.

5. The overpressure cut-off automatic test system for a cut-off valve according to claim 1, characterized in that: Also included is an intake pipe switching device for switching the intake pipe connected to the shut-off valve; The sensing device specifically includes a second sensor and a third sensor; The second sensor is used to detect low-pressure air pressure data of a low-pressure air intake pipe connected to the shut-off valve; The third sensor is used to detect the high-pressure air pressure data of the high-pressure intake pipe connected to the cut-off valve.

6. The overpressure cut-off automatic test system for a cut-off valve according to claim 1, characterized in that: The sensor device specifically also includes a fourth sensor, which is used to detect the outlet air pressure data of the outlet pipe connected to the cut-off valve.

7. The overpressure cut-off automatic test system for a cut-off valve according to claim 1, characterized in that: Also includes a controller and a human-computer interaction device; The human-machine interaction device is used to receive a human-machine interaction instruction and send the human-machine interaction instruction to the controller to control the operation of the electric valve group and the external reset device; The controller is also used to receive the air pressure data transmitted by the sensor device and transmit the air pressure data to the human-computer interaction device.

8. A method for automatically testing overpressure cutoff of a cut-off valve, using the automatic overpressure cutoff testing system of a cut-off valve according to any one of claims 1 to 7, characterized in that: include: Opening the first electric valve, and ventilating air between the first electric valve and the cut-off valve until the cut-off valve is cut off, and reading the cut-off air pressure data when the cut-off valve is cut off; Resetting the shut-off valve by means of the external resetting device; The above process is repeated until a preset amount of the cut-off air pressure data is obtained.

9. The method for automatically testing overpressure cut-off of a cut-off valve according to claim 8, characterized in that: Before the shut-off valve is shut off, the method further includes: when the first air pressure reaches the preset air pressure, opening the second electric valve until the shut-off valve is shut off.

10. The method for automatically testing overpressure cut-off of a cut-off valve according to claim 8, characterized in that: Also includes: When the cut-off valve is cut off, the first electric valve and the second electric valve are closed, and the third electric valve is opened to discharge the gas in the pipeline between the second electric valve and the cut-off valve.

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