CN211576690U - Closed pipeline gas taking device - Google Patents

Abstract

The utility model discloses a closed conduit gets gas device has solved current closed conduit gas sample and has been the loss sample, and the sample volume is great, can destroy the inside atmosphere of part and cause the extravagant problem of part. The utility model discloses a seal structure, seal structure is connected with the sample assembly respectively and welds the subassembly of sealing, and the closed pipeline penetrates in the seal structure, seal structure includes sealing member and sealed end cap, the pipe wall of sealed end cap, sealing member and closed pipeline encloses jointly and closes the sealed chamber of formation, the sample assembly is including getting gas cylinder and vacuum pump, get the gas cylinder with the vacuum pump all with sealed end cap connect and all with sealed chamber intercommunication, it includes laser device to punch to weld the subassembly of sealing, be provided with the light-passing board on the sealed end cap, laser device sees through the light-passing board and punches and welds and seal. The utility model has the advantages of harmless and micro-sampling does not influence the inside gas content and atmosphere of closed conduit and small.

Description

Closed pipeline gas taking device

Technical Field

The utility model relates to a sampling test technical field, concretely relates to closed pipeline gets gas device.

Background

The time for China to enter the industrialized world is decades, and for some part products which have worked for years and are provided with pipeline sealing cavities, the use state of the part must be judged by detecting the state of internal gas.

The traditional method is to adopt a destructive detection mode to acquire the gas state in the pipeline of the part, and the product cannot be used continuously after being detected by the destruction. When the number of products to be detected is large, a sampling mode is generally adopted to take out a part of internal gas by a destructive method, and after the gas components are detected, the use state of other products is judged by a statistical method. The traditional destructive detection method has the following defects: firstly, the method belongs to destructive detection, and wastes parts; secondly, the sampling detection method is not completely accurate in judging the use state of the part which fails to pass the detection; thirdly, the work of the pipeline can be stopped, and the normal operation of experimental production is influenced; fourth, for a closed container with a pipe, the conventional method is to perform destructive sampling, which inevitably destroys the atmosphere inside the container after sampling.

Therefore, there is a need to develop a sampling inspection apparatus for realizing nondestructive inspection in a closed environment.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the technical problem that will solve is: the existing gas sampling and detecting of the closed pipeline is in a destructive form, the internal atmosphere state of the pipeline can be destroyed, the sampling amount is large, the internal gas content of the closed pipeline is influenced, and the normal operation of production research and development is influenced due to the fact that parts are wasted due to destructive sampling.

The utility model provides a solve above-mentioned problem's a closed conduit gas taking device.

The utility model discloses a following technical scheme realizes:

a closed pipeline gas taking device comprises a sealing structure, a sampling assembly and a punching and welding assembly, wherein the sealing structure is respectively connected with the sampling assembly and the punching and welding assembly, a closed pipeline penetrates into the sealing structure, the sealing structure comprises a sealing element and a sealing plug, the sealing element and the pipe wall of the closed pipeline jointly enclose to form a sealing cavity, the sampling assembly comprises a gas taking bottle and a vacuum pump, the gas taking bottle and the vacuum pump are both connected with the sealing plug, the gas taking bottle is communicated with the sealing cavity, the vacuum pump is communicated with the sealing cavity, used for vacuumizing the sealing cavity, the punching and welding assembly comprises a laser device, a light-transmitting plate is arranged on the sealing plug, and the laser device punches and welds the closed pipeline in the sealing cavity through the light transmitting plate.

The design principle of the utility model is that: under many production or research and development environment, closed pipeline continuous operation, closed pipeline part problem appears easily along with the time lapse, just so need react closed pipeline's operating condition through inside gas detection, and to gas detection key lies in how to take out the gas sample from closed pipeline, and the normal use of closed pipeline can not be influenced to the sampling process. The utility model discloses a sealed end cap, the pipe wall of sealing member and closed pipeline encloses jointly and closes and forms sealed chamber, vacuumize through the vacuum pump, form negative pressure environment in sealed chamber, carry out the laser drilling sample in sealed chamber again, vacuum negative pressure environment can let the gas in the closed pipeline flow out smoothly, after the sample is accomplished, the pipe wall of closed pipeline is welded by laser again, because laser can permeate the light-passing board and directly punch and seal the pipe wall of closed pipeline, can not produce mechanical damage to the sealed environment of sealed chamber, can keep the complete seal of whole sealed chamber in whole sample and welding process, totally isolated with the atmosphere, can not receive the influence of gas in the external environment, because laser drilling can control the size of punching very little, the laser device is located the outside in sealed chamber and processes, the seal structure and the sealed chamber that are connected with closed pipeline can also be done very little, therefore, the sampling quantity can be controlled to be small, specifically less than 10ml, and the gas content in the closed pipeline cannot be influenced.

The utility model discloses preferred closed conduit gets gas device, the sealing member includes swivel nut and taper sleeve, the swivel nut with the taper sleeve is connected, the closed conduit penetrates in the taper sleeve, the swivel nut with sealed end cap can dismantle the connection, taper sleeve, sealed end cap with the pipe wall of closed conduit encloses jointly synthetically sealed chamber.

When the sealing device is specifically sealed, the end to be measured of the sealed pipeline is inserted into the taper sleeve, the thread insert sleeve is sleeved at one end of the taper sleeve, which forms the sealing element, the position of the sealing element on the sealed pipeline can be adjusted by sliding the taper sleeve and the thread insert sleeve, when the position to be measured is adjusted, the sealing plug is connected with the thread insert sleeve, and the sealing plug and the taper sleeve form a sealing cavity which seals the sealed pipeline together as the other end of the sealing element.

The utility model discloses preferred a closed pipeline gets gas device, the taper sleeve includes the taper body end, the external diameter of taper body end is from connecting the one end of swivel nut is to connecting the one end of sealed end cap reduces gradually.

Further, the diameter of the inner cavity of the sealing plug is larger than that of the closed pipeline.

During specific sealing operation, the outer wall of the sealing plug is in threaded connection with the threaded sleeve, the inner wall of the sealing plug can be screwed in gradually at the cone end of the taper sleeve until the taper sleeve and the sealed pipeline are completely sealed, and a gap between the sealing plug and the sealed pipeline becomes a gas circulation channel.

The utility model discloses it gets gas device to prefer a closed conduit, it includes laser instrument and laser beam machining head to punch to weld and seal the subassembly, the laser instrument with the laser beam machining head is connected, the laser that jets out sees through in the laser beam machining head the light-passing board is right the position of awaiting measuring of closed conduit punches and welds and seal.

The light-transmitting plate can be penetrated by laser, so that the punching and welding of the pipe wall of the closed pipeline are realized, and the sealing of the sealing cavity in the whole process is ensured.

The utility model discloses preferred closed pipeline gets gas device, be provided with the pressure detection table on the sealed choke plug for detect the pressure in the sealed chamber, thereby the volume of control sample.

The utility model discloses preferred closed pipeline gets gas device, get the gas cylinder with connect through trachea one between the sealed end cap, trachea one is last to be provided with solenoid valve one.

The utility model discloses preferred closed pipeline gets gas device, the vacuum pump with connect through trachea two between the sealed end cap, be provided with solenoid valve two on the trachea two.

Furthermore, the first electromagnetic valve is a first electromagnetic valve, and the second electromagnetic valve is a second electromagnetic valve.

After sealed operation is accomplished, the gas in the sealed chamber is the air, if do not get rid of totally can exert an influence to the gas sample that takes out, leads to the testing result inaccurate, the utility model discloses a set up the vacuum pump that can open and close and get the gas bottle, through control solenoid valve one and for solenoid valve two's order to punch and weld the restoration that seals the realization sample and seal the pipeline through laser.

Further, the laser is a quasi-continuous single mode fiber laser.

Further, sealed end cap and laser beam machining head all install on the mounting panel, the mounting panel is located mechanical platform's top, the laser instrument with the vacuum pump is all installed mechanical platform is last.

Specifically, the gas taking operation is carried out according to the following steps:

step 1: screwing the sealing plug out of the threaded sleeve until the taper sleeve can move freely between the sealing plug and the threaded sleeve;

step 2: inserting the closed pipeline into the threaded sleeve and the taper sleeve, fixing the relative position between the closed pipeline and the threaded sleeve after selecting the position to be detected of the closed pipeline, and screwing the sealing plug into the threaded sleeve until the taper sleeve and the outer wall of the closed pipeline are sealed;

and step 3: opening the first electromagnetic valve and the second electromagnetic valve, starting the vacuum pump, closing the first electromagnetic valve, closing the second electromagnetic valve and closing the vacuum pump when the reading of the pressure detection meter is zero;

and 4, step 4: and starting a laser, adjusting beam parameters, starting laser drilling, and simultaneously starting a first electromagnetic valve to start closed pipeline internal atmosphere collection. In the sampling process, as the gas flows from the closed pipeline to the sealing plug, the gas pressure of the sealing cavity is gradually increased until the gas pressure and the gas pressure are equal, and the sampling is finished.

And 5: and after the gas collection is finished, closing the first electromagnetic valve, opening the laser, and welding and sealing the hole of the closed pipeline.

The punching size in the step 4 is as follows: the diameter is 0.1-0.5 mm.

The utility model discloses an adjustment laser beam parameter for punch and weld and seal and accomplish on same platform laser instrument, reduced the volume of device and saved the cost, and make sample operating efficiency also more high-efficient.

The utility model discloses have following advantage and beneficial effect:

1. the utility model discloses a laser punches from sealed chamber outside, guarantees the airtight of sealed chamber in whole sample process to the air in the sealed chamber is got rid of in the evacuation, makes whole process all go on under with external isolated environment, and the inside gas of product can not receive the pollution, and the back is accomplished in the sample, adopts laser again to weld and seals, and the pipeline after welding seals satisfies technical use requirement, does not influence the normal use of closed conduit.

2. The utility model discloses a laser punches from the outside, compares the mechanical mode of punching, can reduce the volume of device and the volume in sealed chamber, and through the control laser beam for the size of punching is very little, specifically can reach 0.1-0.5mm, thereby makes the gas of taking out from the closed pipeline very little, specifically can be less than 10ml, can not exert an influence to the gas content in the closed pipeline, does not influence the normal use of closed pipeline.

3. The utility model discloses the laser instrument that uses is the quasi-continuous single mode fiber laser, has small, and the characteristics that the portability is high, and through adjusting laser parameter for laser beam drilling and laser welding seal use same laser instrument to accomplish, have with low costs, small characteristics when accomplishing the task target.

4. The utility model discloses sealed with the taper sleeve locking formula that adopts when the pipeline outer wall is sealed, easy operation, it is sealed effectual.

5. The utility model discloses the whole volume of device is less, can fix the detection, also can switch to the part that the wheel state detected required removal detection.

Drawings

The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:

fig. 1 is a schematic perspective view of the present invention.

Fig. 2 is a schematic sectional view of the present invention.

Fig. 3 is a schematic view of the three-dimensional structure in the working state of the present invention.

Reference numbers and corresponding part names in the drawings:

1-closed pipeline, 2-threaded sleeve, 3-taper sleeve, 4-sealed plug, 5-light-transmitting plate, 6-small hole position, 7-laser beam, 8-electromagnetic valve II, 9-vacuum pump, 10-electromagnetic valve I, 11-gas taking bottle, 12-pressure detecting meter, 13-sealed cavity, 14-mechanical platform, 15-laser, 16-mounting plate, 17-product to be detected, 18-laser processing head, 19-micro atmosphere sampling device and 20-support leg.

Detailed Description

To make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the following examples and drawings, and the exemplary embodiments and descriptions thereof of the present invention are only used for explaining the present invention, and are not intended as limitations of the present invention.

In the present invention, the structure part of the laser and the vacuum pump is named as: a trace atmosphere sampling device.

Example 1

As shown in fig. 1 and 2, a closed pipeline gas taking device comprises a sealing structure, a sampling assembly and a punching and welding assembly, wherein the sealing structure comprises a sealing element and a sealing plug 4, the sealing element comprises a threaded sleeve 2 and a conical sleeve 3, the threaded sleeve 2 is connected with the conical sleeve 3, the closed pipeline 1 penetrates into the conical sleeve 3, the sealing plug 4 and the pipe wall of the closed pipeline 1 jointly enclose a sealing cavity 13, the conical sleeve 3 comprises a conical body end, the outer diameter of the conical body end is gradually reduced from one end connected with the threaded sleeve 2 to one end connected with the sealing plug 4, the inner cavity diameter of the sealing plug 4 is larger than that of the closed pipeline 1, during specific sealing operation, the end to be measured of the closed pipeline 1 is inserted into the conical sleeve 3, the threaded sleeve 2 is sleeved on the conical sleeve 3 to form one end of the sealing element, and the position of the sealing element on the closed pipeline 1 can be adjusted by sliding the threaded sleeve 2 and the conical sleeve 3, when the position to be measured is adjusted, the sealing plug 4 is connected with the threaded sleeve 2, the other end of the sealing plug 4 serving as a sealing piece and the taper sleeve 3 form a sealing cavity 13 for sealing the closed pipeline 1, the outer wall of the sealing plug 4 is in threaded connection with the threaded sleeve 2, the inner wall of the sealing plug 4 can be screwed in gradually at the taper end of the taper sleeve 3 until the taper sleeve 3 and the closed pipeline 1 are completely sealed, and a gap between the sealing plug 4 and the closed pipeline 1 becomes a gas circulation channel.

The sampling component comprises a gas taking bottle 11 and a vacuum pump 9, the gas taking bottle 11 is connected with a sealing plug 4 through a first air pipe, the first air pipe is provided with a first electromagnetic valve 10, the first electromagnetic valve 10 controls the connection and disconnection between the gas bottle 11 and the sealing cavity 13, the vacuum pump 9 is connected with the sealing plug 4 through a second air pipe, the second air pipe is provided with a second electromagnetic valve 8, the second electromagnetic valve 8 controls the connection and disconnection between the vacuum pump 9 and the sealing cavity 13, when the second electromagnetic valve 8 is opened, the vacuum pump 9 can vacuumize the sealing cavity 13 so as to form a negative pressure environment and completely pump away air so as to prevent the gas taken out from polluting and influencing a detection result.

And a light-transmitting plate 5 is arranged on the sealing plug 4, the light-transmitting plate 5 is made of light-transmitting glass, and the laser device punches and welds the closed pipeline 1 in the sealing cavity 13 through the light-transmitting plate 5.

And the sealing plug 4 is provided with a pressure detection meter 12 for detecting the air pressure in the sealing cavity 13 and judging whether the air is completely pumped and whether a required negative pressure environment is formed, so that the sampling amount is controlled and the taken gas is ensured not to be polluted by the air.

The seal subassembly that welds of punching includes laser instrument 15 and laser beam machining head 18, laser instrument 15 with laser beam machining head 18 is connected, the laser beam 7 that jets out sees through in the laser beam machining head 18 the light-passing board 5 is right the position that awaits measuring of closed tube 1 punches and welds and seal.

The light-transmitting plate 5 can be penetrated by laser, so that the pipe wall of the closed pipeline 1 can be punched and welded, and the sealing of the sealing cavity 13 in the whole process is ensured.

After sealed operation is accomplished, the gas in the sealed chamber 13 is the air, if do not get rid of totally can exert an influence to the gas sample that takes out, leads to the testing result inaccurate, the utility model discloses a set up the vacuum pump 9 that can open and close and get gas bottle 11, through control solenoid valve 10 and for the order of solenoid valve two 8 to punch and weld through laser and seal the restoration that realizes taking a sample and seal pipeline 1.

The specific gas extraction method comprises the following steps:

step 1: screwing the sealing plug 4 out of the threaded sleeve 2 until the taper sleeve 3 can move freely between the sealing plug 4 and the threaded sleeve 2;

step 2: inserting the closed pipeline 1 into the threaded sleeve 2 and the taper sleeve 3, fixing the relative position between the closed pipeline 1 and the threaded sleeve 2 after selecting the position to be measured of the closed pipeline 1, and screwing the sealing plug 4 into the threaded sleeve 2 until the taper sleeve 3 and the outer wall of the closed pipeline 1 are sealed;

and step 3: opening a first electromagnetic valve 10 and a second electromagnetic valve 8, starting a vacuum pump 9, closing the first electromagnetic valve 10, closing the second electromagnetic valve 8 and closing the vacuum pump 9 when the reading of the pressure detection meter 12 is zero;

and 4, step 4: and (3) starting a laser 15, adjusting beam parameters, starting laser drilling, simultaneously starting a first electromagnetic valve 10, enabling the internal gas of the closed pipeline 1 to flow to the sealed cavity 13 through the small hole position 6, and starting atmosphere collection inside the closed pipeline 1. During the sampling process, as the gas flows from the closed pipeline 1 to the sealing plug 4, the gas pressure of the sealing cavity 13 gradually rises until the gas pressure and the sealing plug are equal, and the sampling is completed.

And 5: and after the gas collection is finished, closing the first electromagnetic valve 10, opening the laser 15, and welding and sealing the hole of the closed pipeline 1.

The punching size in the step 4 is as follows: the diameter is 0.1-0.5 mm.

Example 2

This embodiment differs from embodiment 1 in that the laser 15 is a quasi-continuous single mode fiber laser 15, and the same laser 15 is used for laser drilling and laser sealing.

Example 3

As shown in fig. 3, the present embodiment is different from embodiment 2 in that the micro-atmosphere sampling device 19 is mounted on a mounting plate 16 via a foot 20, the laser processing head 18 is also mounted on the mounting plate 16, the laser 15 and the vacuum pump 9 are mounted in a mechanical stage 14, the mounting plate 16 is attached to the top of the mechanical stage 14, and a roller is mounted on the bottom of the mechanical stage 14.

The legs 20 are of a telescopic construction and allow the height of the micro-atmosphere sampling device 19 to be adjusted according to the height of the product 17 to be inspected.

During specific operation, a product 17 to be detected is placed on the mounting plate 16 to be fixed, the product 17 to be detected is moved to enable the closed pipeline 1 to penetrate into the sealing structure, and after the product reaches a preset position, the threaded sleeve 2 and the sealing plug 4 are screwed down to form the sealing cavity 13. Opening the first electromagnetic valve 10 and the second electromagnetic valve 8, starting the vacuum pump 9, closing the first electromagnetic valve 10, closing the second electromagnetic valve 8 and closing the vacuum pump 9 when the indication number of the pressure detection meter 12 is a preset pressure value, and forming a vacuum environment in the sealed cavity 13 at the moment. And (3) starting a laser 15, adjusting to preset parameters, adjusting beam parameters, starting laser drilling, controlling the diameter of the small hole within the range of 0.1-0.5mm, and simultaneously starting a first electromagnetic valve 10, wherein gas in the closed pipeline 1 escapes from the pipeline under the action of internal and external pressure difference and enters the gas taking bottle 11. After the reading of the pressure detection meter 12 tends to be stable, atmosphere collection is completed, the electromagnetic valve is closed, the laser 15 is started to weld and seal the small gas taking hole, then the gas taking device is taken down, and the detection process is completed.

In the present invention, the terms "upper", "lower", "top" and "bottom" all refer to the orientation shown in the drawings.

The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above description is only the embodiments of the present invention, and is not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims (8)

1. A closed pipeline gas taking device is characterized by comprising a sealing structure, a sampling assembly and a punching and welding assembly, wherein the sealing structure is respectively connected with the sampling assembly and the punching and welding assembly,

the sealing structure is characterized in that a sealing pipeline (1) penetrates into the sealing structure, the sealing structure comprises a sealing piece and a sealing plug (4), the sealing piece and the pipe wall of the sealing pipeline (1) jointly enclose to form a sealing cavity (13)

The sampling assembly comprises a gas taking bottle (11) and a vacuum pump (9), the gas taking bottle (11) and the vacuum pump (9) are both connected with the sealing plug (4), the gas taking bottle (11) is communicated with the sealing cavity (13), the vacuum pump (9) is communicated with the sealing cavity (13) and is used for vacuumizing the sealing cavity (13),

the punching and welding assembly comprises a laser device, a light-transmitting plate (5) is arranged on the sealing plug (4), and the laser device penetrates through the light-transmitting plate (5) to punch and weld the closed pipeline (1) in the sealing cavity (13).

2. The closed pipeline gas taking device according to claim 1, wherein the sealing element comprises a threaded sleeve (2) and a taper sleeve (3), the threaded sleeve (2) is connected with the taper sleeve (3), the closed pipeline (1) penetrates into the taper sleeve (3), the threaded sleeve (2) is detachably connected with the sealing plug (4), and the tapered sleeve (3), the sealing plug (4) and the pipe wall of the closed pipeline (1) jointly enclose the sealing cavity (13).

3. A closed conduit degassing device according to claim 2, wherein said cone (3) comprises a cone end having an outer diameter decreasing from the end connected to said threaded sleeve (2) to the end connected to said sealing plug (4).

4. A closed conduit gas extraction device according to any one of claims 1-3, wherein the hole-drilling and welding assembly comprises a laser (15) and a laser processing head (18), the laser (15) and the laser processing head (18) are connected, and the laser processing head (18) drills and welds the to-be-measured part of the closed conduit (1) through the light-transmitting plate (5).

5. A closed conduit degassing device according to any one of claims 1-3, wherein said sealing plug (4) is provided with a pressure gauge (12) for measuring the pressure in the sealed chamber (13).

6. A closed pipeline gas taking device according to any one of claims 1 to 3, wherein the gas taking bottle (11) is connected with the sealing plug (4) through a first gas pipe, and a first electromagnetic valve (10) is arranged on the first gas pipe.

7. A closed pipeline gas taking device according to any one of claims 1-3, wherein the vacuum pump (9) is connected with the sealing plug (4) through a second gas pipe, and a second electromagnetic valve (8) is arranged on the second gas pipe.

8. A closed conduit degassing device according to claim 4, wherein the sealing plug (4) and the laser processing head (18) are both mounted on a mounting plate (16), the mounting plate (16) being located on top of the mechanical platform (14), the laser (15) and the vacuum pump (9) being both mounted on the mechanical platform (14).

Images