Cylinder valve multi-station durability testing machine

Abstract

The utility model discloses a multi-station durability testing machine for a cylinder valve, which comprises a buffer container, the bottom of the buffer container is communicated with a nitrogen inlet and a water discharge interface, and the top of the buffer container is communicated with a second manual valve and a first normally closed pneumatic control valve in parallel through pipelines and then is respectively communicated with a plurality of groups of testing stations. And each group of test stations sequentially comprises a manual pressure reducing valve, a throttling valve, a manual valve III, an electric rotating tool and a pneumatic control ball valve. The cylinder valve is placed on a corresponding tool and in a test temperature environment, and high-pressure air or nitrogen is used as a medium to carry out durability test on the cylinder valve. According to the utility model, torque control and turn number control are adopted, and the two schemes can be independently set and can be adjusted; the test rate can be adjusted according to test standards.

Description

Technical Field

[0001] The utility model relates to a multi-station durability testing machine for bottle valves, belonging to the technical field of testing devices. Background Art

[0002] Existing bottle valve durability testing machines used for durability testing of liquefied petroleum gas bottle valves, liquefied dimethyl ether bottle valves, liquefied petroleum gas smart valves, etc. can only test a single sample and cannot test multiple samples at the same time. Summary of the Invention

[0003] The technical problem to be solved by the utility model is to provide a multi-station durability testing machine for bottle valves used for durability testing of liquefied petroleum gas bottle valves, liquefied dimethyl ether bottle valves, liquefied petroleum gas intelligent valves and the like.

[0004] In order to solve the above problems, the utility model provides a multi-station durability testing machine for bottle valves, which includes a buffer container. The bottom of the buffer container is connected to the nitrogen inlet and the water drain interface. The top of the buffer container is connected to manual valve 2 and normally closed air-controlled valve 1 in parallel through pipelines, and then connected to multiple groups of test stations respectively. Each group of test stations includes a manual pressure reducing valve, a throttle valve, a manual valve 3, an electric rotary tooling, and an air-controlled ball valve in sequence.

[0005] Preferably, a manual valve 1 is provided on the water discharge interface.

[0006] Preferably, a filter 1 and a pressure sensor 1 are sequentially connected between the buffer container and the parallel pipelines of the manual valve 2 and the normally closed air-controlled valve 1.

[0007] Preferably, a branch is provided between the manual pressure reducing valve and the throttle valve, and a normally closed air control valve 2 is provided on the branch.

[0008] Preferably, a branch is provided between the throttle valve and the third manual valve, and the branch is connected in parallel to a pressure gauge and a second pressure sensor.

[0009] Preferably, the electric rotary tooling and the pneumatically controlled ball valve are arranged in a high and low temperature box test chamber.

[0010] More preferably, a pressure balance window is provided on the high and low temperature box test chamber.

[0011] Preferably, a third pressure sensor is provided between the electric rotary tooling and the pneumatically controlled ball valve.

[0012] Preferably, the multi-station durability testing machine for bottle valves further comprises a low-pressure buffer tank, the inlet of the low-pressure buffer tank is connected to the instrument air inlet via a one-way valve, and the outlet is connected to all valve components in parallel.

[0013] More preferably, the outlet of the low-pressure buffer tank is first connected to the second filter and then communicated with each valve component.

[0014] The valve is placed on the corresponding fixture and placed in the test temperature environment, and the durability test is performed on the valve using high-pressure air or nitrogen as the medium. This utility model adopts torque control and turn control, both of which can be set and adjusted independently. The test rate can be adjusted according to the test standard, and the test pressure can be adjusted from 0 to 30MPa. One test station can be tested in a test environment with a temperature of -40 to 85°C. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the piping connection of the multi-station durability testing machine for bottle valves;

[0016] Figure 2 Schematic diagram of the gas circuit connection of each valve component. DETAILED DESCRIPTION

[0017] In order to make the present invention more clear and easy to understand, preferred embodiments are described in detail below with reference to the accompanying drawings.

[0018] Example

[0019] like Figure 1 As shown, a multi-station durability testing machine for bottle valves of the present invention comprises a buffer container 2, the bottom of the buffer container 2 is connected to a nitrogen inlet and a water discharge interface, and a manual valve 1 is provided on the water discharge interface.

[0020] The top of buffer container 2 is connected sequentially to filter 1 (3) and pressure sensor 1 (4), and then to manual valve 2 (5) and normally closed air-controlled valve 1 (6) in parallel via pipelines, which then connect to multiple groups of test stations (the figure shows five groups for example only). A branch is provided between the manual pressure-reducing valve 7 and the throttle valve 9, on which is installed the normally closed air-controlled valve 2 (8). A branch is provided between the throttle valve 9 and manual valve 3 (12), which is connected in parallel to the pressure gauge 10 and pressure sensor 2 (11).

[0021] Each test station group includes, in order, a manual pressure reducing valve 7, a throttle valve 9, a third manual valve 12, an electric rotary fixture 14, a third pressure sensor 15, and a pneumatic ball valve 16. These electric rotary fixtures 14, pressure sensor 15, and pneumatic ball valve 16 are located within a high- and low-temperature chamber test chamber 13, which is equipped with a pressure balancing window 17.

[0022] The gas connections of each valve are as follows: Figure 2 As shown, the inlet of the low-pressure buffer tank 19 is connected to the instrument air inlet through a one-way valve 18, and the outlet is divided into two pipelines, one of which is directly connected to all valve components in parallel through a filter 20; the other pipeline is first connected to a filter 20, and then connected to each valve component through a solenoid valve 21 in parallel corresponding to each valve component.

[0023] The test mode of the above device is as follows:

[0024] Test mode 1: (In this mode, the valve of the test piece is in the closed state)

[0025] The outlet of the test bottle valve is blocked, the system provides stable test pressure, and the torque tooling drives the test bottle valve to perform an opening and closing cycle test;

[0026] Test mode 2: (In this mode, the valve of the test piece is in the closed state)

[0027] The outlet of the test bottle valve is not blocked, the torque tool closes the test valve, the system pressurizes the test valve to the test pressure, the torque tool opens the test valve and monitors the test line pressure. When the pressure is lower than the set value, the torque tool closes the test valve. This test process is one test cycle;

[0028] Test mode 3: (In this mode, the valve of the test piece is in the closed state)

[0029] Close the exhaust valve on the outlet pipeline after the test valve, let air in through the inlet before the test valve, close the test valve with the torque tool, monitor the pressure drop of the outlet pipeline after the test valve within 6 seconds (stop the test if the pressure drop exceeds 1MPa), open the exhaust valve to reduce the pressure after the valve to normal pressure, close the exhaust valve, monitor whether the pressure increase of the outlet pipeline after the test valve exceeds 0.5MPa within 6 seconds, open the test valve with the torque tool and keep it open for 6 seconds to keep the pressure before and after the valve balanced; this test process is one test cycle.

Claims

1. A multi-station durability testing machine for bottle valves, characterized in that: The invention comprises a buffer container (2), the bottom of the buffer container (2) is connected to a nitrogen inlet and a water discharge interface, the top of the buffer container (2) is connected in parallel to a manual valve 2 (5) and a normally closed air control valve 1 (6) through a pipeline, and then connected to multiple groups of test stations, each group of test stations sequentially comprising a manual pressure reducing valve (7), a throttle valve (9), a manual valve 3 (12), an electric rotary tool (14), and an air control ball valve (16).

2. The multi-station durability testing machine for bottle valves according to claim 1, characterized in that: A manual valve (1) is provided on the water discharge interface.

3. The multi-station durability testing machine for bottle valves according to claim 1, characterized in that: A filter (3) and a pressure sensor (4) are sequentially connected between the buffer container (2), the manual valve (2) and the parallel pipeline of the normally closed air control valve (1) (6).

4. The multi-station durability testing machine for bottle valves according to claim 1, characterized in that: A branch is provided between the manual pressure reducing valve (7) and the throttle valve (9), and a normally closed air control valve 2 (8) is provided on the branch.

5. The multi-station durability testing machine for bottle valves according to claim 1, characterized in that: A branch is provided between the throttle valve (9) and the third manual valve (12), and the branch is connected in parallel to a pressure gauge (10) and a second pressure sensor (11).

6. The multi-station durability testing machine for bottle valves according to claim 1, characterized in that: The electric rotary tool (14) and the air-controlled ball valve (16) are arranged in a high and low temperature box test chamber (13).

7. The multi-station durability testing machine for bottle valves according to claim 6, characterized in that: The high and low temperature box test chamber (13) is provided with a pressure balance window (17).

8. The multi-station durability testing machine for bottle valves according to claim 1, 6 or 7, characterized in that: A pressure sensor 3 (15) is provided between the electric rotary tooling (14) and the air-controlled ball valve (16).

9. The multi-station durability testing machine for bottle valves according to claim 1, characterized in that: The low-pressure buffer tank (19) is also included. The inlet of the low-pressure buffer tank (19) is connected to the instrument gas inlet through a one-way valve (18), and the outlet is connected to all valve components in parallel.

10. The multi-station durability testing machine for bottle valves according to claim 9, characterized in that: The outlet of the low-pressure buffer tank (19) is first connected to the second filter (20), and then communicated with each valve component through the electromagnetic valve (21) or directly communicated with each valve component.

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