Pressure-adjustable suction gun

Abstract

The utility model relates to the field of hydrogen helium mass spectrum leak detection, in particular to a pressure-adjustable suction gun, a suction gun tube is fixed on a holding section through a suction gun adapter, an adapter cavity is arranged in the suction gun adapter, the suction gun tube and a gas tube are arranged in parallel and are communicated with the adapter cavity of the suction gun adapter, a fixing block is arranged in the holding section, and the pressure-adjustable suction gun is arranged in the fixing block. The adjusting rod is fixed after being in sliding fit with the fixing block in the axial direction of the suction gun barrel and is inserted into a barrel cavity of the suction gun barrel after penetrating through the transfer cavity, and the diameter of the adjusting rod is smaller than the inner diameter of the suction gun barrel; a positioning hole is formed in the fixing block in the radial direction, the adjusting rod penetrates through the positioning hole and then enters the adapter cavity, a jackscrew in threaded fit is arranged in the positioning hole of the fixing block, and the adjusting rod is pressed and fixed by the jackscrew. According to the utility model, the pressure of the suction gun can be regulated so as to control the flow of sucked gas.

Description

Technical Field

[0001] The utility model relates to the field of hydrogen-helium mass spectrometry leak detection, in particular to a pressure-adjustable suction gun. Background Art

[0002] A sniffer gun is a specialized tool used in helium mass spectrometer leak detectors for aspiration leak detection. It moves a nozzle along the area being tested, sucking in helium leaking from the container. This helium is then fed into a mass spectrometer for analysis, thereby determining the leak location and leak rate. Existing sniffer guns, as described in publication number "CN220649924U," consist of a sniffer tube and a capillary tube. The sniffer tube is used to align the area being tested, while the capillary tube serves as the sampling probe for the sniffer gun, precisely aspirating air containing trace amounts of helium. During the aspiration process, the capillary tube, with its small inner diameter and high surface tension, prevents helium loss due to diffusion, thereby ensuring accurate sampling.

[0003] Because traditional sniffer guns use capillaries for sampling, their inner diameter is extremely small and prone to clogging, rendering the sniffer gun unusable. Furthermore, to meet the flow requirements of the hydrogen-helium mass spectrometer during leak detection, capillaries of different sizes must be replaced under different operating conditions. This requires adjusting the diameter, length, or internal pressure of the capillary to control the flow of the inhaled gas. Each leak detection requires debugging and replacing a different capillary, resulting in extremely low leak detection efficiency and an urgent problem that needs to be addressed. Utility Model Content

[0004] In order to avoid and overcome the technical problems existing in the prior art, the present invention provides a pressure-adjustable suction gun. The present invention can adjust the pressure of the suction gun to control the flow rate of the inhaled gas.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] A pressure-adjustable suction gun, wherein the suction gun tube is fixed to a gripping section via a suction gun adapter, a transfer chamber is provided in the suction gun adapter, the suction gun tube and the air pipe are arranged in parallel and are both connected to the transfer chamber of the suction gun adapter, a fixing block is provided in the gripping section, an adjusting rod is fixed after slidingly fitting with the fixing block along the axial direction of the suction gun tube, and is inserted into the tube chamber of the suction gun tube after passing through the transfer chamber, the diameter of the adjusting rod is smaller than the inner diameter of the suction gun tube; a positioning hole is provided in the radial direction on the fixing block, the adjusting rod enters the transfer chamber after passing through the positioning hole, a threaded top screw is provided in the positioning hole of the fixing block, and the adjusting rod is pressed and fixed by the top screw.

[0007] As a further solution of the present invention, the adapter cavity of the suction gun adapter is arranged radially along the suction gun adapter, and the adapter cavity is open in one direction, and the opening of the adapter cavity is sealed by a plug.

[0008] As a further solution of the present invention: the end of the grip section away from the suction gun tube is connected to a handle glove through a first adapter, the handle glove is connected to the aviation plug adapter through a second adapter, the first air pipe connector is fixed on the aviation plug adapter, and is connected to the helium mass spectrometer leak detector through the aviation plug adapter.

[0009] As a further solution of the present invention: the holding section is in the shape of a hollow tube, the fixing block and the second trachea joint are both arranged in the tube cavity of the holding section and arranged parallel to each other, and the first trachea joint and the second trachea joint are arranged at both ends of the trachea to form a two-way support for the trachea.

[0010] As a further solution of the present invention: a filter head is provided at the pipe mouth of the suction gun tube, and at least two groups of filter sheets are provided in the filter head; sealing rings are provided at the assembly surfaces of the filter head and the suction gun adapter and the suction gun tube.

[0011] As a further solution of the present invention: a stainless steel sintered filter disc, a wool felt filter disc and a copper sintered filter disc are sequentially arranged in the filter head along the direction of air flow.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] 1. The utility model incorporates a built-in adjustment rod in the sniffer tube. The adjustment rod is placed on a fixed block, slid along the fixed block, and then fixed to adjust the insertion depth of the adjustment rod in the sniffer tube. Due to the extremely small gap between the adjustment rod and the sniffer tube, the ultra-narrow annular channel formed by the rod produces a capillary-like effect. The longer the adjustment rod is inserted into the sniffer tube, the smaller the flow conductance and flow rate in the sniffer tube, and the pressure decreases accordingly. Conversely, the pressure increases, thereby adjusting the pressure. The sniffer pressure can be adjusted as the adjustment rod moves linearly along the lumen of the sniffer tube.

[0014] 2. The fixing block of the utility model is provided with a top screw, and the adjusting rod can be pressed and fixed by screwing the top screw, so that the adjusting rod is locked and fixed after being inserted into the suction gun tube to a set depth, and the adjustment is simple.

[0015] 3. The adapter of the present invention is opened radially to form an adapter cavity, and the hole is then closed by a plug. The parallel air pipes and the suction gun pipe are staggered and connected through the adapter cavity, and the positions of the air pipes and the adjustment rods do not interfere with each other.

[0016] 4. The double air pipe joint of the utility model forms two-end support for the air pipe, and the stacked arrangement of multiple types of filter sheets improves the filtering effect at the nozzle of the suction gun pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is an exploded view of the structure of the present invention.

[0018] Figure 2 This is a simplified diagram of the matching relationship between the suction gun tube and the adjustment rod in the utility model.

[0019] Figure 3 This is a structural assembly drawing of the present utility model.

[0020] In the picture:

[0021] 1. Grip section; 11. First adapter; 12. Handle cover; 13. Second adapter;

[0022] 14. First air pipe connector; 15. Aviation plug adapter;

[0023] 2. Suction gun adapter; 21. Plug;

[0024] 3. Suction gun tube; 4. Filter head;

[0025] 41. Stainless steel sintered filter disc; 42. Wool felt filter disc; 43. Copper sintered filter disc;

[0026] 5. Adjusting rod; 51. Fixing block; 52. Top screw;

[0027] 6. Trachea; 61. Second trachea connector. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0029] See also Figures 1 to 3 In an embodiment of the present invention, a pressure-adjustable suction gun includes a filter head 4, a suction gun tube 3, a suction gun adapter 2, a grip section 1, a first adapter 11, a handle cover 12, a second adapter 13 and an aviation plug adapter 15, which are arranged in sequence along the length direction.

[0030] The filter head 4 is positioned at the muzzle of the lance tube 3 to filter the inhaled air. Along the flow direction of the inhaled air, a stainless steel sintered filter sheet 41, a wool felt filter sheet 42, and a copper sintered filter sheet 43 are stacked in sequence within the filter head 4. The assembly between the filter head 4 and the lance tube 3 can be done by any method, including plug-in fastening or threaded fastening. A sealing ring is provided at the assembly surface.

[0031] The sniffer line 3 is eccentrically mounted on the sniffer adapter 2, allowing it to be placed parallel to the air pipe 6 while maximizing the use of the limited installation space. The sniffer line 3 and sniffer adapter 2 can be assembled in any manner, including plug-in or threaded fastening. A sealing ring is provided on the assembly surface.

[0032] The gripping section 1 is tubular, and the air supply pipe 6 and the adjusting rod 5 pass through the lumen of the gripping section 1. A fixing block 51 and a second air pipe joint 61 are built into the lumen of the gripping section 1 to support the air supply pipe 6 and the adjusting rod 5 respectively.

[0033] The second air pipe connector 61 is built into the grip section 1 and can be connected to the sniffer adapter 2 via plug-in or threaded fastening. A sealing ring is provided between the mating surface of the second sniffer adapter 2 and the adjustment rod 5 to enhance sealing. The sniffer adapter 2 has a radial opening to form a connection cavity, which is sealed with a plug 21. Both the sniffer tube 3 and the air pipe 6 are inserted into the connection cavity to provide gas communication.

[0034] The fixing block 51 has an axially defined sliding cavity for the adjusting rod 5 to pass through. A radially defined positioning hole is defined on the side of the fixing block 51, intersecting the sliding cavity. A top screw 52 is threadedly mounted within the positioning hole, tightening it to secure the adjusting rod 5 and prevent axial movement.

[0035] After passing through the sniffer adapter 2, the adjustment rod 5 is coaxially inserted into the sniffer tube 3. The diameter of the adjustment rod 5 is smaller than the inner diameter of the sniffer tube 3. As the adjustment rod 5 moves linearly within the sniffer tube 3, it changes the airflow area within the sniffer tube 3, thereby regulating pressure. Simultaneously, its linear advance and retreat also clears blockages within the sniffer tube 3. The adjustment rod 5 can be unlocked by loosening the top screw, allowing its position to be manually readjusted.

[0036] The end of the grip section 1, away from the sniffer tube 3, is equipped with a first adapter 11, which coaxially secures a handle glove 12 of a different model. The handle glove 12 is connected to an aviation plug adapter 15 via a second adapter 13. This aviation plug adapter 15 is coaxially equipped with a first air pipe connector 14, which connects to a helium mass spectrometer leak detector. The first air pipe connector 14 and the second air pipe connector 61, when combined, provide bidirectional support for the air pipe 6.

[0037] The basic principles of the present application have been described above in conjunction with specific embodiments. However, it should be noted that the advantages, strengths, and effects mentioned in this application are merely illustrative and not restrictive, and it should not be assumed that these advantages, strengths, and effects are required of each embodiment of this application. In addition, the specific details disclosed above are merely illustrative and facilitating understanding, and are not restrictive. The above details do not limit this application to necessarily being implemented using the above specific details.

[0038] The block diagrams of the devices, devices, equipment, and systems involved in this application are merely illustrative examples and are not intended to require or imply that they must be connected, arranged, or configured in the manner shown in the block diagrams. As will be appreciated by those skilled in the art, these devices, devices, equipment, and systems can be connected, arranged, or configured in any manner. Words such as "include," "comprise," "have," and the like are open-ended words, meaning "including but not limited to," and can be used interchangeably therewith. The words "or" and "and" used herein refer to the words "and / or" and can be used interchangeably therewith, unless the context clearly indicates otherwise. The word "such as" used herein refers to the phrase "such as but not limited to," and can be used interchangeably therewith.

Claims

1. A pressure-adjustable suction gun, characterized in that: The suction gun tube (3) is fixed to the gripping section (1) through the suction gun adapter (2). A transfer cavity is provided in the suction gun adapter (2). The suction gun tube (3) and the air pipe (6) are arranged in parallel and are both communicated with the transfer cavity of the suction gun adapter (2). A fixing block (51) is provided in the gripping section (1). The adjusting rod (5) is fixed after slidingly fitting with the fixing block (51) along the axial direction of the suction gun tube (3). The adjusting rod (5) passes through the transfer cavity and is inserted into the tube cavity of the suction gun tube (3). The diameter of the adjusting rod (5) is smaller than the inner diameter of the suction gun tube (3). A positioning hole is provided in the radial direction of the fixing block (51). The adjusting rod (5) enters the transfer cavity after passing through the positioning hole. A screw threaded top screw (52) is provided in the positioning hole of the fixing block (51). The adjusting rod (5) is pressed and fixed by the top screw (52).

2. The adjustable pressure suction gun according to claim 1, characterized in that: The adapter cavity of the suction gun adapter (2) is arranged radially along the suction gun adapter (2), and the adapter cavity is open in one direction. The orifice of the adapter cavity is sealed by a plug (21).

3. The pressure-adjustable suction gun according to claim 1 or 2, characterized in that: One end of the grip section (1) away from the suction gun tube (3) is connected to a handle glove (12) via a first adapter (11); the handle glove (12) is connected to an aviation plug adapter (15) via a second adapter (13); a first air pipe connector (14) is fixed to the aviation plug adapter (15) and connected to a helium mass spectrometer leak detector via the aviation plug adapter (15).

4. The adjustable pressure suction gun according to claim 3, characterized in that: The gripping section (1) is in the shape of a hollow tube. The fixing block (51) and the second tracheal connector (61) are both arranged in the lumen of the gripping section (1) and are arranged parallel to each other. The first tracheal connector (14) and the second tracheal connector (61) are arranged at both ends of the trachea (6) to form a bidirectional support for the trachea (6).

5. The pressure-adjustable suction gun according to claim 1 or 2, characterized in that: A filter head (4) is provided at the mouth of the suction gun tube (3), and at least two groups of filter sheets are provided in the filter head (4); and sealing rings are provided at the assembly surfaces of the filter head (4) and the suction gun adapter (2) and the suction gun tube (3).

6. The pressure-adjustable suction gun according to claim 5, characterized in that: A stainless steel sintered filter disc (41), a wool felt filter disc (42) and a copper sintered filter disc (43) are sequentially arranged in the filter head (4) along the direction of air flow.

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