Anti-blocking pressure-adjustable suction gun

Abstract

The utility model relates to the field of hydrogen helium mass spectrum leak detection, in particular to an anti-blocking type 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, and the suction gun tube and a gas tube are both communicated with the adapter cavity of the suction gun adapter; the holding section is further provided with a driving motor, and a motor shaft of the driving motor is in a screw rod shape and is parallel to the suction gun pipe. A motor shaft of the driving motor is provided with a nut seat which is matched with a lead screw sliding block along a shaft body of the motor shaft, the adjusting rod is installed on the nut seat and coaxially arranged with the gun suction pipe, the adjusting rod penetrates through the adapting cavity and then is inserted into a pipe cavity of the gun suction pipe, and the diameter of the adjusting rod is smaller than the inner diameter of the gun suction pipe. According to the utility model, on-line pressure regulation of the suction gun can be realized.

Description

Technical Field

[0001] The utility model relates to the field of hydrogen-helium mass spectrometry leak detection, in particular to an anti-clogging 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 an anti-clogging pressure-adjustable suction gun. The present invention can realize online pressure adjustment of the suction gun.

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

[0006] Disclosed is an anti-clogging adjustable pressure suction gun, in which a suction gun tube is fixed to a gripping section via a suction gun adapter, a transfer chamber being provided in the suction gun adapter, the suction gun tube and the air pipe being connected to the transfer chamber of the suction gun adapter; the gripping section is further provided with a driving motor, the motor shaft of the driving motor being in the shape of a screw rod and being arranged parallel to the suction gun tube; a nut seat is provided on the motor shaft of the driving motor, which is fitted with a screw rod slider formed along the shaft body of the motor; an adjusting rod is provided on the nut seat and is coaxially arranged with the suction gun tube, the adjusting rod passes through the transfer chamber and is inserted into the lumen of the suction gun tube, and the diameter of the adjusting rod is smaller than the inner diameter of the suction gun tube.

[0007] As a further solution of the present invention: the holding section is tubular, a mounting seat is provided in the tubular cavity of the holding section, and the driving motor is fixed to the mounting seat by a positioning pin; a guide column is fixed on the nut seat along the direction parallel to the adjustment rod, which passes through the mounting seat and slides with the mounting seat, and a guide hole is also installed on the mounting seat for the air pipe to pass through.

[0008] 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.

[0009] As a further solution of the present invention: a fixing seat is provided at the end of the holding section away from the gun suction tube, which is sleeved on the outer ring of the driving motor. The fixing seat is connected to the three-way joint through a cable connector. The three-way joint is connected to the helium mass spectrometer leak detector through a first aviation plug adapter; the three-way joint is connected to the second aviation plug adapter through a motor socket.

[0010] As a further solution of the present invention: a first trachea joint is coaxially arranged on the first aviation plug adapter, and a second trachea joint is coaxially arranged with the first trachea joint on the suction gun adapter. 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.

[0011] 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.

[0012] 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.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] 1. The utility model has a built-in motor in the suction gun, which drives the lead screw and the nut seat to form a sliding fit of the lead screw, thereby driving the adjusting rod to move linearly in the suction gun tube. Since the gap between the adjusting rod and the suction gun tube is extremely small, the ultra-narrow annular channel formed by the enclosed area produces a capillary effect. The longer the adjusting rod is inserted into the suction gun tube, the smaller the flow conductance and flow rate in the suction gun tube, and the pressure also decreases accordingly. Conversely, the pressure increases, thereby adjusting the pressure. As the adjusting rod moves linearly along the lumen of the suction gun tube, the size of the suction gun pressure can be adjusted. At the same time, the adjusting rod can clear the suction gun tube while being driven by the motor to move linearly, thereby avoiding blockage of the suction gun tube.

[0015] 2. The drive motor of the present invention is built into the mounting base and fixed to the mounting base by a positioning pin. The mounting base is provided with a plurality of groups of holes along the axial direction for the air pipe and the guide column to pass through, thereby forming support for the adjustment rod and the air pipe.

[0016] 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.

[0017] 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

[0018] Figure 1 This is an exploded view of the structure of the present invention.

[0019] Figure 2 This is a simplified diagram of the matching relationship between the suction gun tube and the adjustment rod in the utility model.

[0020] Figure 3 This is a structural assembly drawing of the present utility model.

[0021] In the picture:

[0022] 1. Grip section; 11. Mounting seat; 111. Guide column; 12. Fixed seat;

[0023] 13. Cable connector; 14. Tee connector; 141. First air pipe connector;

[0024] 142. First aviation plug adapter; 143. Motor socket; 144. Second aviation plug adapter;

[0025] 2. Suction gun adapter; 21. Plug; 3. Suction gun tube; 4. Filter head;

[0026] 41. Stainless steel sintered filter disc; 42. Wool felt filter disc; 43. Copper sintered filter disc;

[0027] 5. Adjustment rod; 6. Trachea; 61. Second trachea connector;

[0028] 7. Drive motor; 71. Nut seat; 72. Positioning pin. DETAILED DESCRIPTION

[0029] 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.

[0030] See also Figures 1 to 3 In an embodiment of the present invention, an anti-clogging adjustable pressure suction gun includes a filter head 4, a suction gun tube 3, a suction gun adapter 2, a grip section 1, a fixing seat 12, a cable connector 13 and a three-way connector 14 arranged in sequence along the length direction.

[0031] 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.

[0032] 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.

[0033] The grip section 1 is tubular, and a mounting seat 11 is provided in the lumen thereof. The mounting seat 11 is provided with a plurality of holes through which the air supply pipe 6 and the adjusting rod 5 pass, guiding and supporting the air supply pipe 6 and the adjusting rod 5 at the same time.

[0034] The sniffer adapter 2 is mounted with a second air pipe connector 61, which can be internally secured to the mounting base 11. A sealing ring is provided between the sniffer adapter 2 and the adjustment rod 5 to enhance sealing. The sniffer adapter 2 has radial openings to form a transfer cavity, which is sealed with a plug 21. The sniffer tube 3 and air pipe 6 are both inserted into the transfer cavity to provide gas communication.

[0035] A fixing base 12 is mounted on the end of the gripping section 1 away from the gun suction tube 3. The drive motor 7 is built into the fixing base 12. The motor shaft of the drive motor 7 is a screw shaft, and a nut base 71 is mounted on the shaft. When the drive motor 7 rotates forward and reverse, it drives the nut base 71 to move in a straight line. The drive motor 7 is connected and fixed to the mounting base 11 by at least two sets of locating pins 72. The adjustment rod 5 is fixed to the nut base 71 and moves in a straight line with the nut base 71. A guide column 111 arranged parallel to the adjustment rod 5 is also fixed to the nut base 71. The guide column 111 is in sliding engagement with the mounting base 11. The air pipe 6 passes through the side of the drive motor 7.

[0036] 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 the pressure. Simultaneously, its linear movement also clears any blockages within the sniffer tube 3.

[0037] The cable connector 13 is preferably built into a tee connector 14, which is directly connected to the mounting base 12 via a plug-in or threaded connection. A motor socket 143 is mounted on the tee connector 14, which is connected to a second aviation plug adapter 144. The cable from the motor socket 143 supplies power to the drive motor 7 through the cable connector 13, and the air pipe 6 passes through the cable connector 13. A first aviation plug adapter 142 is also provided at the axial end of the tee connector 14, which is connected to the helium mass spectrometer leak detector via the first aviation plug adapter 142.

[0038] The first aviation plug adapter 142 is coaxially provided with a first trachea joint 141 for supporting and fixing the trachea 6 . The first trachea joint 141 and the second trachea joint 61 form a bidirectional support for the trachea 6 when matched.

[0039] 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.

[0040] 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. An anti-clogging adjustable pressure suction gun, characterized in that: The gun suction pipe (3) is fixed to the gripping section (1) through the gun suction adapter (2). A transfer cavity is provided in the gun suction adapter (2). The gun suction pipe (3) and the air pipe (6) are both connected to the transfer cavity of the gun suction adapter (2). The gripping section (1) is also equipped with a driving motor (7). The motor shaft of the driving motor (7) is in the shape of a screw rod and is arranged in parallel with the gun suction pipe (3). A nut seat (71) is installed on the motor shaft of the driving motor (7) and is formed along the shaft body of the motor shaft to cooperate with the screw rod slider. The adjusting rod (5) is installed on the nut seat (71) and is coaxially arranged with the gun suction pipe (3). The adjusting rod (5) passes through the transfer cavity and is inserted into the lumen of the gun suction pipe (3). The diameter of the adjusting rod (5) is smaller than the inner diameter of the gun suction pipe (3).

2. The anti-clogging adjustable pressure suction gun according to claim 1, characterized in that: The gripping section (1) is tubular, and a mounting seat (11) is provided in the tubular cavity of the gripping section (1), and the driving motor (7) is fixed to the mounting seat (11) via a positioning pin (72); a guide column (111) is fixed on the nut seat (71) along a direction parallel to the adjustment rod (5), and passes through the mounting seat (11) and is slidably engaged with the mounting seat (11); and a guide hole is also provided on the mounting seat (11) for the air supply pipe (6) to pass through.

3. The anti-clogging 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).

4. The anti-clogging adjustable pressure suction gun according to any one of claims 1 to 3, characterized in that: A fixing seat (12) sleeved on the outer ring of the driving motor (7) is provided at one end of the gripping section (1) away from the gun suction tube (3); the fixing seat (12) is connected to a three-way joint (14) via a cable joint (13); the three-way joint (14) is connected to a helium mass spectrometer leak detector via a first aviation plug adapter (142); and the three-way joint (14) is connected to a second aviation plug adapter (144) via a motor socket (143).

5. The anti-clogging adjustable pressure suction gun according to claim 4, characterized in that: A first air pipe joint (141) is coaxially arranged on the first aviation plug adapter (142), and a second air pipe joint (61) coaxially arranged with the first air pipe joint (141) is provided on the suction gun adapter (2). The first air pipe joint (141) and the second air pipe joint (61) are arranged at both ends of the air pipe (6) to form a bidirectional support for the air pipe (6).

6. The anti-clogging adjustable pressure suction gun according to any one of claims 1 to 3, 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).

7. The anti-clogging adjustable pressure suction gun according to claim 6, 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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