Tool for testing service life of flow switch in high-voltage state

Abstract

The utility model discloses a tool for testing the service life of a flow switch in a high-voltage state. The device comprises a tank body, a pressure gauge, a flow switch and a trigger assembly. The tank body is provided with a first interface, a second interface and a pair of third interfaces, the first interface is externally connected with air inlet equipment for pressurization and air injection, the second interface is provided with a pressure gauge for displaying air pressure, and flow switches are arranged on the third interfaces. The triggering assembly comprises a pair of pen-shaped cylinders and a counter, the cylinders are installed through fourth connectors at the two ends of the tank body, piston rods stretch out and draw back to push flow switches to be opened and closed, and the counter accumulates movement times. The tank body of the tool is cylindrical, the layout of each interface is reasonable, and the flow switch is detachably connected with the tank body. According to the tool, the defects of a traditional testing method are overcome, the high-pressure environment can be accurately simulated, the service life of the flow switch under the high-pressure working condition is efficiently and accurately tested through the automatic triggering assembly and the counting function, the testing efficiency and the data accuracy are improved, and it is guaranteed that the testing result is reliable.

Description

Technical Field

[0001] This utility model relates to the field of fluid control equipment testing, specifically to a high-pressure life testing fixture for flow switches. Background Technology

[0002] In the research and development and production of flow switches, service life and reliability testing is a crucial step. Traditional flow switch service life testing methods mainly rely on manual operation or simple low-pressure condition simulation, which has the following shortcomings:

[0003] 1. Limited testing conditions: Existing technologies cannot accurately simulate the actual working environment of flow switches under high pressure, resulting in insufficient accuracy of test results.

[0004] 2. Low testing efficiency: Manual control methods result in long testing cycles and make it difficult to accurately control the number of tests.

[0005] 3. The data is not intuitive enough: it is difficult to monitor the number of times the flow switch is activated and the performance changes under high pressure.

[0006] Therefore, the above problems urgently need to be solved. Utility Model Content

[0007] Purpose of the utility model: To overcome the above shortcomings, the purpose of this utility model is to provide a high-pressure life test fixture for flow switches. By setting up a tank with multiple interfaces and connecting an external air intake device to pressurize the tank and simulate a high-pressure working environment, a pressure gauge installed on the tank displays the air pressure in real time. Combined with trigger components connected to the tank and adapted to different flow switches, and with the flow switch's installation interface, the fixture enables automated cyclic opening and closing tests of the flow switch under high-pressure conditions. A counter accurately accumulates the number of trigger component actions, thereby accurately and efficiently testing the lifespan of the flow switch under high-pressure conditions. This solves the problems of traditional testing methods, such as difficulty in simulating high-pressure environments, low testing efficiency, inaccurate counting, and poor versatility.

[0008] Technical Solution: This utility model provides a high-pressure life test fixture for a flow switch, comprising a tank, a pressure gauge (not shown), a flow switch, and a triggering component. The tank has a first interface, a second interface, and a pair of third interfaces. The first interface is used for connecting an external air intake device to pressurize and inject gas into the tank. The pressure gauge is installed on the second interface to display the gas pressure inside the tank. The flow switch is installed on the third interface. The triggering component is installed on the tank and corresponds to the flow switch, used for cyclically opening and closing the flow switch. The tank is equipped with a first interface, which serves as a key channel for high-pressure gas to enter the fixture system and is specifically designed for connecting an external air intake device. Through this interface, gas can be stably and controllably pressurized and injected into the tank, causing the gas pressure inside the tank to rapidly rise to a preset high-pressure test range, accurately simulating the gas pressure environment that the flow switch experiences under actual high-pressure working conditions, ensuring the authenticity and reliability of the test conditions. A high-precision pressure gauge is installed on the second interface, directly connected to the inner cavity of the tank. This allows for real-time and accurate monitoring of pressure changes within the tank, maintaining a stable pressure during testing. Any pressure fluctuations indicate a problem with the flow switch's airtightness. A pair of third interfaces are specifically designed for the flow switch, which is securely installed here, seamlessly connecting to the high-pressure environment inside the tank. The trigger component is mounted on the tank and precisely corresponds to the flow switch. Based on a preset program and logic, it can cyclically open and close the flow switch at a stable and precise rhythm during continuous high-pressure operation. The functionality of the flow switch is determined by whether an externally connected diode illuminates or by other devices that assess circuit continuity. This automated cyclic triggering mechanism perfectly simulates the frequent operation of the flow switch in complex high-pressure operations, significantly improving testing efficiency, reducing human error, and ensuring the comprehensiveness and accuracy of the flow switch lifespan test.

[0009] Furthermore, this application discloses a high-pressure life testing fixture for a flow switch. The tank is cylindrical, with the first and second interfaces positioned opposite each other on the middle of the tank's side. A pair of third interfaces are axially positioned on the side of the tank. Fourth interfaces are also positioned opposite each other at both ends of the tank. The triggering component includes a pair of pen-shaped cylinders, each corresponding to a flow switch. The pair of pen-shaped cylinders are mounted at both ends of the tank via the fourth interfaces. Piston rods on the pen-shaped cylinders extend into the tank through the fourth interfaces, and the reciprocating motion of the piston rods drives the flow switch to open and close. The cylindrical tank design provides excellent pressure resistance, evenly distributing the pressure of high-pressure gas on the tank wall, effectively ensuring safety during testing. Simultaneously, the regular cylindrical shape facilitates the manufacturing, installation, and connection with other equipment, laying the foundation for the stability of the entire testing system. The fourth interfaces positioned opposite each other at both ends of the tank serve as the key channels for the triggering component to enter the tank. A trigger assembly consisting of a pair of pen-shaped cylinders corresponds one-to-one with the flow switch. Installed at both ends of the tank via a fourth interface, the pen-shaped cylinders operate stably, unaffected by high pressure within the tank, and precisely output power. The piston rod on the pen-shaped cylinder extends into the tank through the fourth interface, and according to a preset control program, the piston rod can perform reciprocating motion. This motion mode directly acts on the flow switch. When the piston rod extends, it provides the external force required to open the flow switch; when the piston rod retracts, it simulates the reverse force of the flow switch in its naturally closed state. Through precise stroke control and force adjustment, it perfectly replicates the frequent opening and closing actions of the flow switch in actual use, ensuring the authenticity and comprehensiveness of the test.

[0010] Furthermore, in the high-voltage life test fixture for a flow switch described in this application, the triggering component further includes a counter (not shown), which is used to accumulate the number of reciprocating movements of the piston rod. Each time the piston rod completes its reciprocating movement of extending and retracting according to a preset program, the counter can accurately capture this dynamic change, providing the most basic and reliable data basis for subsequent flow switch life assessment.

[0011] Furthermore, this application discloses a high-pressure life testing fixture for a flow switch. The flow switch includes a main body and a blocking component connected to the main body. The blocking component is oscillating to trigger connection and disconnection with the main body. The blocking component extends into the tank from a third interface. The piston rod is perpendicular to the blocking component, and the reciprocating motion of the piston rod pushes the blocking component to oscillate. The blocking component extending into the tank from the third interface achieves a tight connection between the flow switch and the high-pressure environment inside the tank. The third interface provides a stable and suitable installation channel for the blocking component. The piston rod and the blocking component are perpendicular, a clever arrangement that lays the foundation for precise pushing of the blocking component. The vertical force transmission is more direct and efficient. When the piston rod reciprocates, the thrust applied to the blocking component can cause the blocking component to oscillate around its connection point with the main body at the optimal angle. The reciprocating motion of the piston rod pushes the blocking component to oscillate, perfectly simulating the frequent opening and closing motion of the flow switch in actual use. When the piston rod extends, it can precisely provide an outward thrust to the blocking component, so that the flow switch is in the open or closed state. When the piston rod retracts, the blocking component swings in the opposite direction under its own elasticity or other reset mechanism, so that the flow switch is in the opposite state.

[0012] Furthermore, in this application, a high-voltage life testing fixture for a flow switch includes a blocking component comprising a stop rod and a baffle plate. One end of the stop rod extends to a third interface, and the other end is connected to the baffle plate via a screw. The piston rod faces the baffle plate. The blocking component employs a combined structure of the stop rod and baffle plate, a design that endows the blocking component with diverse functional characteristics. The stop rod, as a connecting component, extends to a third interface at one end, enabling it to establish a stable connection with the fixture's tank and external structure, ensuring accurate installation and positioning of the blocking component within the entire testing fixture system. The other end is connected to the baffle plate via a screw. This connection method not only ensures the connection strength between the stop rod and the baffle plate but also facilitates disassembly, replacement, or maintenance operations when needed, improving the overall maintainability of the blocking component.

[0013] Furthermore, in the high-pressure life test fixture for a flow switch in this application, the third and fourth interfaces are arranged axially symmetrically along the radial centerline of the tank. For the flow switch, mounting it axially symmetrically on the side of the tank via the third interface ensures that its position within the tank is symmetrical relative to the center of the tank, and that the external forces such as pressure and impact on the flow switch are relatively balanced in all directions.

[0014] Furthermore, this application provides a high-pressure life testing fixture for a flow switch, wherein the flow switch and the tank are detachably threadedly connected. This detachable feature greatly facilitates the installation and removal of the flow switch.

[0015] Furthermore, in the high-voltage life testing fixture for a flow switch of this application, the first, second, third, and fourth interfaces all protrude from the tank body. The protruding interfaces provide more ample operating space for connecting external devices and components, avoiding obstruction of the tank surface during installation and disassembly of pipelines and devices due to the interfaces being flush with the tank surface, thus making operation smoother.

[0016] As can be seen from the above technical solution, this utility model has the following beneficial effects:

[0017] 1. The high-pressure life test fixture for flow switches described in this utility model utilizes a unique interface layout of the tank to work in conjunction with external equipment, accurately simulating high-pressure working scenarios. The first interface connects to an external air intake device to achieve stable and controllable pressurization, quickly bringing the tank pressure to the preset high-pressure range, realistically replicating the actual pressure environment of the flow switch. The second interface features a high-precision pressure gauge that provides real-time feedback on pressure changes, ensuring accurate and controllable test pressure and providing reliable data for testing. Simultaneously, a pair of third interfaces are specifically designed to adapt to flow switches, featuring detachable threaded connections, allowing for stable installation of flow switches of different specifications and precise connection to high-pressure airflow. This ensures a high degree of consistency between test conditions and actual working conditions, making the flow switch performance test results more convincing and effectively solving the problem of traditional testing methods' inability to accurately simulate high-pressure environments.

[0018] 2. The high-voltage life testing fixture for flow switches described in this utility model improves testing efficiency and data accuracy through an automated triggering component and precise counting function. A pair of pen-shaped cylinders in the triggering component, according to a preset program, stably and accurately cycle the opening and closing of the flow switch via the reciprocating motion of the piston rod, perfectly simulating the frequent actions in complex high-voltage operations. This eliminates the inefficiency and errors of manual operation, significantly shortening the testing cycle for single and batch flow switches. Furthermore, the counter equipped in the triggering component accurately accumulates the number of piston rod movements, directly corresponding to the flow switch operation frequency, providing accurate quantitative data for life assessment. Combined with the on / off monitoring circuit of the flow switch, this comprehensively ensures the authenticity and reliability of the test data, greatly improving test accuracy and overcoming the problems of inaccurate counting and low efficiency in traditional tests. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of a high-voltage life test fixture for a flow switch according to the present invention.

[0020] Figure 2 This is a schematic diagram of the tank structure of a high-pressure life test fixture for flow switches according to this utility model.

[0021] Figure 3 for Figure 2 Enlarged schematic diagram of region A in the middle.

[0022] Explanation of reference numerals in the accompanying drawings: 1-tank body, 11-first interface, 12-second interface, 13-third interface, 14-fourth interface, 2-flow switch, 21-body, 22-blocking component, 221-stop lever, 222-baffle plate, 3-trigger assembly, 31-pen-shaped cylinder, 311-piston rod. Detailed Implementation

[0023] The present invention will be further explained below with reference to the accompanying drawings and specific embodiments.

[0024] like Figure 1 , 2 The high-pressure life test fixture for a flow switch shown in Figure 3 uses a cylindrical tank 1 made of high-strength stainless steel to ensure that it can withstand high pressure and has good stability and durability.

[0025] Interfaces are provided on the tank body 1. The first interface 11, the second interface 12, a pair of third interfaces 13, and a pair of fourth interfaces 14 are all protruding to facilitate the connection and operation of external equipment. The first interface 11 and the second interface 12 are arranged opposite each other in the middle of the side of the tank body 1. The third interface 13 is arranged along the axial direction of the tank body on the side of the tank body 1, and the third interface 13 and the fourth interface 14 are arranged symmetrically along the radial centerline of the tank body.

[0026] A pressure gauge (not shown) with an accuracy of 0.01 MPa is installed on the second port 12 to accurately display the air pressure inside the tank 1. The flow switch 2 is installed on the third port 13 via a detachable threaded connection. One end of the stop lever 221 extends out of the third port 13, and the other end is connected to the baffle 222 by a screw to ensure a secure connection and easy maintenance.

[0027] The trigger assembly 3 consists of a pair of pen-shaped cylinders 31, each corresponding to a flow switch 2. The pen-shaped cylinders 31 are mounted at both ends of the tank 1 via a fourth interface 14, with their piston rods 311 extending into the tank 1 through the fourth interface 14 and perpendicular to the baffle 222 of the flow switch 2. The trigger assembly 3 is also equipped with a counter (not shown, an electronic counter is used, capable of recording to a precise count of 1) to accumulate the number of reciprocating movements of the piston rods 311.

[0028] Before testing, connect the external air intake device to the first interface 11 and set the intake pressure to 1.5 MPa. Start the air intake device (not shown), and gas enters the tank 1 through the first interface 11. Observe the pressure gauge on the second interface 12. When the air pressure reaches 1.5 MPa, keep the air intake device running stably. At this time, the pen-shaped cylinder 31 of the trigger component 3 starts according to the preset program. The piston rod 311 reciprocates, pushing the blocking part 22 of the flow switch 2 to swing, thereby cyclically opening and closing the flow switch 2. Each time the piston rod 311 extends or retracts, the counter will accumulate and record. During the test, continuously monitor the pressure gauge reading. If the air pressure fluctuates significantly, check the airtightness of the flow switch 2 and the sealing of the entire test fixture.

[0029] After a prolonged test (e.g., 1000 cycles), the performance changes of flow switch 2 are observed, and the counter values ​​and air pressure changes during the test are recorded. The lifespan and reliability of flow switch 2 under a high pressure of 1.5 MPa are comprehensively evaluated. The test fixture in this embodiment effectively simulates a high-pressure working environment, enabling automated testing of flow switches, improving testing efficiency and data accuracy, and providing strong support for the research and development and production of flow switches.

[0030] The above embodiments are exemplary and are intended to illustrate the technical concept and features of this utility model, so that those skilled in the art can understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be covered within the scope of protection of this utility model.

Claims

1. A high-voltage condition life test fixture for flow switches, characterized in that: Includes a tank (1), which is provided with a first interface (11), a second interface (12) and a pair of third interfaces (13). The first interface (11) is used to connect an external air intake device to pressurize and inject air into the tank (1). A pressure gauge, which is installed on the second interface (12), is used to display the air pressure inside the tank (1); A flow switch (2) is installed on the third interface (13); Trigger component (3), which is installed on tank body (1) and corresponds to flow switch (2), is used to cyclically open and close flow switch.

2. The high-voltage life test fixture for a flow switch according to claim 1, characterized in that: The tank (1) is cylindrical. The first interface (11) and the second interface (12) are located opposite each other in the middle of the side of the tank (1). A pair of third interfaces (13) are located along the axial direction of the tank (1) on the side of the tank (1). The two ends of the tank (1) are also provided with fourth interfaces (14). The triggering component (3) includes a pair of pen-shaped cylinders (31). The pen-shaped cylinders (31) and the flow switch (2) correspond one-to-one. The pair of pen-shaped cylinders (31) are installed at both ends of the tank (1) through the fourth interface (14). The piston rod (311) provided on the pen-shaped cylinder (31) extends into the tank (1) through the fourth interface (14). The reciprocating motion of the piston rod (311) pushes the flow switch (2) to open and close.

3. The high-voltage life test fixture for a flow switch according to claim 2, characterized in that: The triggering component (3) also includes a counter, which is used to accumulate the number of times the piston rod (311) reciprocates.

4. The high-voltage life test fixture for a flow switch according to claim 3, characterized in that: The flow switch (2) includes a body (21) and a blocking member (22). The blocking member (22) is connected to the body (21). The connection and disconnection between the blocking member (22) and the body (21) are triggered by swinging the blocking member (22). The blocking member (22) extends into the tank (1) from the third interface (13). The piston rod (311) is perpendicular to the blocking member (22). The reciprocating motion of the piston rod (311) pushes the blocking member (22) to swing.

5. The high-voltage life test fixture for a flow switch according to claim 4, characterized in that: The blocking member (22) includes a stop bar (221) and a baffle plate (222). One end of the stop bar (221) extends to a third interface (13), and the other end is connected to the baffle plate (222) by a screw. The piston rod (311) is directly opposite the baffle plate (222).

6. The high-voltage life test fixture for a flow switch according to claim 5, characterized in that: The third interface (13) and the fourth interface (14) are arranged symmetrically along the radial centerline of the tank (1).

7. The high-voltage life test fixture for a flow switch according to claim 6, characterized in that: The flow switch (2) and the tank (1) are detachably threaded together.

8. The high-voltage life test fixture for a flow switch according to claim 7, characterized in that: The first interface (11), the second interface (12), the third interface (13) and the fourth interface (14) are all protruding on the tank body (1).

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