Gas valve with air tightness detection

Abstract

The utility model relates to gas valve test technical field especially is a kind of gas valve with air tightness detection, including table board, panel, first vertical board and second vertical board, the table board top is fixedly arranged with panel, the table board bottom is fixedly arranged with first vertical board and second vertical board, the first vertical board left end is fixedly arranged with stepper motor, in the utility model, by the stepper motor, threaded screw rod, sleeve rod, limit block, sliding plate, ring pipe, helium delivery pump, flexible spring pipe and air hole being lastly arranged, stepper motor is started in low speed forward direction first and then is started in low speed reverse direction, drives threaded screw rod forward, reverses, so that sliding plate reciprocatingly slides along the sleeve rod direction, helium is sprayed by air hole position, structure main body forms the moving air jet structure in negative pressure air tightness detection, and it is convenient to carry out rapid detection processing to the possible air tightness leak point of gas valve main body.

Description

Technical Field

[0001] This utility model relates to the field of gas valve testing technology, specifically a gas valve with airtightness detection. Background Technology

[0002] Air tightness testing is a crucial part of gas valve quality control. It is used to verify the safe and reliable operation of gas valves and ensure that they can effectively prevent gas leakage when closed. Common methods for air tightness testing of gas valves include air tightness testing using a negative pressure helium mass spectrometer. Taking the above testing method for air tightness continuity testing of gas valves as an example.

[0003] When using negative pressure helium mass spectrometer equipment to test the airtightness of gas valves, a fixed jet structure is used to jet the gas valve with installation limit. This makes it inconvenient to quickly locate and detect potential airtightness leaks in the main body of the gas valve. Therefore, to address the above problem, a gas valve with airtightness detection is proposed. Summary of the Invention

[0004] The purpose of this invention is to provide a gas valve with airtightness detection to solve the problem mentioned above of the inconvenience in quickly locating and detecting potential airtightness leaks in the gas valve body.

[0005] To achieve the above objectives, this utility model provides the following technical solution: A gas valve with airtightness detection includes a platform, a panel, a first vertical plate, and a second vertical plate. The panel is fixedly mounted on the top of the platform, and the first and second vertical plates are fixedly mounted on the bottom of the platform. A stepper motor is fixedly mounted on the left end of the first vertical plate, and a threaded screw is fixedly mounted on the end of the stepper motor spindle. The right end of the threaded screw is rotatably mounted to the left end of the second vertical plate. Two sleeve rods are symmetrically distributed and fixedly mounted between the first and second vertical plates. Two limiting blocks are symmetrically distributed and fixedly mounted on the top left and top right of the sleeve rods. A sliding plate is mounted on the outside of the threaded screw and the outside of the sleeve rods. A ring tube is fixedly mounted on the top of the sliding plate. A helium gas delivery pump is fixedly mounted on the bottom of the platform. A flexible spring tube is fixedly connected to the bottom end of the helium gas delivery pump and the bottom end of the ring tube. An air hole is provided on the inner wall of the upper part of the ring tube.

[0006] Preferably, the inside of the slide plate is threadedly assembled with the outside of the threaded screw, and the inside of the slide plate is slidably disposed with the outside of the sleeve rod.

[0007] Preferably, a gas valve body is provided on the top of the panel, and a valve seat is fixedly provided at the bottom of the gas valve body. The valve seat and the panel are assembled by studs.

[0008] Preferably, the gas valve body is arranged vertically to the ring pipe, and the front-end pipeline of the helium delivery pump and the helium control delivery pipeline system are sealed and installed through a flange.

[0009] Preferably, the outlet pipe at the right end of the gas valve body is sealed and installed with the detection tube of the helium mass spectrometer via a flange.

[0010] Compared with the prior art, the beneficial effects of this utility model are: In this invention, the stepper motor, threaded screw, sleeve, limit block, slide plate, ring tube, helium delivery pump, flexible spring tube, and air hole are configured as described above. The stepper motor starts at low speed in the forward direction and then at low speed in the reverse direction, driving the threaded screw to move in both directions. This causes the slide plate to slide back and forth along the sleeve direction. During this process, the flexible spring tube is in a stretched state to maintain the delivery of helium. Helium enters the interior of the flexible spring tube and the ring tube, and is ejected through the air hole. The main structure forms a moving jet structure for negative pressure airtightness detection, which facilitates the rapid location and detection of potential airtightness leaks in the gas valve body. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of the tabletop, panel, first upright plate, and second upright plate of this utility model. Figure 2 This is a schematic diagram of the gas valve body, valve seat, and gas hole structure of this utility model; Figure 3 This utility model Figure 2 A schematic diagram of the structure at point A; Figure 4 This is a cross-sectional structural diagram of the ring tube of this utility model.

[0012] In the diagram: 1. Platform; 2. Panel; 3. First upright plate; 4. Second upright plate; 5. Stepper motor; 6. Threaded screw; 7. Sleeve rod; 8. Limiting block; 9. Slide plate; 10. Ring tube; 11. Helium delivery pump; 12. Flexible spring tube; 13. Gas valve body; 14. Valve seat; 15. Gas hole. Detailed Implementation

[0013] The technical solutions of the utility model embodiments will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the utility model, and not all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the utility model.

[0014] In the embodiments of the utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the position or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations of the utility model. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Similarly, words such as "an," "a," or "the" do not indicate a quantity limitation, but rather indicate the presence of at least one. Words such as "comprising" or "including" mean that the element or object preceding the word covers the element or object listed after the word and its equivalents, without excluding other elements or objects.

[0015] Furthermore, in the embodiments of the utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0016] Please see Figure 1-4 This utility model provides a technical solution: A gas valve with airtightness detection includes a platform 1, a panel 2, a first vertical plate 3, and a second vertical plate 4. The panel 2 is fixedly installed at the top of the platform 1, and the first vertical plate 3 and the second vertical plate 4 are fixedly installed at the bottom of the platform 1. A stepper motor 5 is fixedly installed at the left end of the first vertical plate 3, and a threaded screw 6 is fixedly installed at the end of the main shaft of the stepper motor 5. The right end of the threaded screw 6 is rotatably connected to the left end of the second vertical plate 4. Two sleeve rods 7 are symmetrically distributed and fixedly installed between the first vertical plate 3 and the second vertical plate 4. Two limiting blocks 8 are symmetrically distributed and fixedly installed on the top left and top right sides of the sleeve rods 7. A sliding plate 9 is installed on the outside of the threaded screw 6 and the outside of the sleeve rods 7. A ring tube 10 is fixedly installed at the top of the sliding plate 9. A helium delivery pump 11 is fixedly installed at the bottom of the platform 1. A flexible spring tube 12 is fixedly connected to the bottom end of the helium delivery pump 11 and the bottom end of the ring tube 10. An air hole 15 is provided on the inner wall of the ring tube 10, forming an airtightness moving jet structure for vacuum negative pressure connection detection.

[0017] The slide plate 9 is threadedly assembled with the outer side of the threaded screw 6, and the slide plate 9 is slidably mounted with the outer side of the sleeve rod 7. Through the above arrangement, the slide plate 9 is guided to move along the sleeve rod 7. A gas valve body 13 is provided on the top of the panel 2, and a valve seat 14 is fixedly provided at the bottom of the gas valve body 13. The valve seat 14 and the panel 2 are assembled with studs and threads. Through the above arrangement, the gas valve body 13 is installed and limited. The gas valve body 13 is vertically arranged with the ring pipe 10. The front pipe of the helium delivery pump 11 and the helium control delivery pipeline system are sealed and installed through a flange. Through the above arrangement, the helium gas source is provided to the main structure. The right end outlet pipe of the gas valve body 13 is sealed and installed through a flange with the detection tube of the helium mass spectrometer. Through the above arrangement, the negative pressure pipe of the vacuum pump and the end pipe of the helium mass spectrometer are sealed and installed through a flange. The helium mass spectrometer and the vacuum pump together form a connected detection structure for the gas valve body 13.

[0018] Workflow: This utility model provides a gas valve airtightness detection structure. The front pipeline of the helium delivery pump 11 and the helium control delivery pipeline system are sealed and installed through a flange. The right end outlet pipe of the gas valve body 13 and the detection tube of the helium mass spectrometer are sealed and installed through a flange. The negative pressure pipe of the vacuum pump and the end pipe of the helium mass spectrometer are sealed and installed through a flange. The electrical components inside the main structure and related installations are powered by an external power supply. The stepper motor 5 and the helium delivery pump 11 installed inside the main structure are controlled by an external PLC controller. The valve seat 14 and the panel 2 are assembled with studs and threads to limit the installation of the gas valve body 13 at the top of the panel 2, adjust the internal valve of the gas valve body 13 to the closed state, and start the vacuum pump under negative pressure, which needs to be evacuated to ≤10⁻³. Under a high vacuum of mbar, the stepper motor 5 has the characteristic of bidirectional start. The stepper motor 5 starts at low speed in the forward direction and then starts at low speed in the reverse direction, driving the threaded screw 6 to move in the forward and reverse directions, so that the slide plate 9 slides back and forth along the direction of the sleeve rod 7. Two limit blocks 8 symmetrically arranged on the top left and top right of the sleeve rod 7 limit the slide plate 9. During this process, the flexible spring tube 12 is in a stretched state to maintain the delivery of helium. Helium enters the interior of the flexible spring tube 12 and the interior of the ring tube 10, and helium is ejected through the gas hole 15. If there is an airtight leak in the gas valve body 13, the helium mass spectrometer can detect helium.

[0019] Although embodiments of the utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A gas valve with air tightness detection, comprising a base plate (1), a face plate (2), a first vertical plate (3) and a second vertical plate (4), characterized in that: The top of the platform (1) is fixedly provided with a panel (2), the bottom of the platform (1) is fixedly provided with a first upright plate (3) and a second upright plate (4), the left end of the first upright plate (3) is fixedly provided with a stepper motor (5), the end of the main shaft of the stepper motor (5) is fixedly provided with a threaded screw (6), the right end of the threaded screw (6) is rotatably provided with the left end of the second upright plate (4), two sleeve rods (7) are symmetrically distributed and fixedly provided between the first upright plate (3) and the second upright plate (4), two limiting blocks (8) are symmetrically distributed and fixedly provided on the left and right sides of the top of the sleeve rods (7), a sliding plate (9) is provided on the outside of the threaded screw (6) and the outside of the sleeve rods (7), a ring tube (10) is fixedly provided at the top of the sliding plate (9), a helium gas delivery pump (11) is fixedly provided at the bottom of the platform (1), a flexible spring tube (12) is fixedly connected to the bottom of the helium gas delivery pump (11) and the bottom of the ring tube (10), and an air hole (15) is provided on the inner wall above the ring tube (10).

2. The gas valve with air tightness detection according to claim 1, characterized in that: The inside of the slide plate (9) is threadedly assembled with the outside of the threaded screw (6), and the inside of the slide plate (9) is slidably disposed with the outside of the sleeve rod (7).

3. The gas valve with air tightness detection according to claim 1, wherein: The top of the panel (2) is provided with a gas valve body (13), and the bottom of the gas valve body (13) is fixedly provided with a valve seat (14). The valve seat (14) and the panel (2) are assembled and installed by stud threads.

4. The gas valve with air tightness detection according to claim 3, characterized in that: The gas valve body (13) and the ring pipe (10) are arranged vertically, and the front end pipe of the helium transfer pump (11) and the helium control and transfer pipeline system are sealed and installed through a flange.

5. The gas valve with air tightness detection according to claim 3, characterized in that: The right end outlet pipe of the gas valve body (13) is sealed and installed with the detection tube of the helium mass spectrometer through a flange.

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