CN210005315U

CN210005315U - anti-suck-back air sampling pipe

Info

Publication number: CN210005315U
Application number: CN201920754048.XU
Authority: CN
Inventors: 沈荷美; 陆英洲
Original assignee: Zhejiang Hangkang Detection Technology Co Ltd
Current assignee: Zhejiang Hangkang Detection Technology Co Ltd
Priority date: 2019-05-23
Filing date: 2019-05-23
Publication date: 2020-01-31
Anticipated expiration: 2029-05-23

Abstract

The utility model belongs to the technical field of the sampling equipment technique and specifically relates to a prevent suck-back air sampling pipe is related to, the utility model discloses a body that has intake pipe and outlet duct, the bottom of body contains the absorption liquid, the intercommunication has the extension, the intercommunication has the suck-back prevention pipe in the intake pipe, the intercommunication has the connecting pipe on the suck-back prevention pipe, the connecting pipe is connected in outside sampling rifle, it is equipped with the closing plug to prevent the intraductal slip of suck-back, the closing plug is equipped with the touch piece towards the side of intake pipe, after closing outside miniature air pump, the closing plug will slide under the effect with the negative pressure and seal in the connecting pipe, the circumstances of suck-back has been reduced takes place, and in the testing process, under the suction effect of miniature air pump, the closing plug will be kept away from in the connecting pipe, the touch piece will be contradicted in the connecting pipe tip this moment, the connecting pipe import will be exposed.

Description

anti-suck-back air sampling pipe

Technical Field

The utility model belongs to the technical field of the sampling equipment technique and specifically relates to a prevent suck-back air sampling pipe.

Background

The air sampling pipe is kinds of glass container for collecting pollutant in atmosphere by solution absorption method, and in order to collect a certain pollutant component in atmosphere, the air sampling pipe is filled with absorption liquid with specific component, then the gas is introduced into the absorption liquid by sampling gun, the pollutant to be detected is absorbed, and the concentration of the pollutant in atmosphere can be determined by analysis and determination.

Current air sampling pipe includes the body, communicates in the intake pipe of body, communicates in the outlet duct of body, and the bottom of body is used for holding the absorption liquid, is connected with the extension pipe that stretches into in the absorption liquid in the intake pipe. Connect outside miniature air pump in the outlet duct earlier to bleed in to the body through the outlet duct, the gas in the outside sampling rifle loops through intake pipe and extension pipe and enters into the absorption liquid, and the absorption liquid will absorb specific pollutant in the gas, and the gas after being absorbed passes through the outlet duct and discharges.

When the miniature air pump sucks the gas in the tube body, negative pressure is formed in the tube body, and after the miniature air pump is closed, the absorption liquid at the bottom of the tube body possibly flows back to the sampling gun under the action of the negative pressure, so that the gas in the sampling gun is required to be re-sampled, and the absorption liquid is polluted or even corrodes the sampling gun.

SUMMERY OF THE UTILITY MODEL

To the not enough of above-mentioned prior art, the utility model aims at providing prevent suck-back air sampling pipe, can reduce the circumstances of suck-back effectively and take place.

prevent suck-back air sampling pipe, including the body that has intake pipe and outlet duct, the bottom of body contains the absorption liquid, the intercommunication has the extension that stretches into in the absorption liquid in the intake pipe, the intake pipe is kept away from the of body and is served the intercommunication and have the anti-suck-back pipe, the that the anti-suck-back pipe was kept away from the intake pipe is served and is served the intercommunication and have the connecting pipe, the connecting pipe is connected in outside sampling rifle, the slip is inlayed in the anti-suck-back pipe and is equipped with the sealing plug that seals in the connecting pipe under the negative pressure, the sealing plug is the interval setting with the top of preventing suck-back pipe inner wall, and the sealing plug is equipped with the support of contradicting in the connecting pipe tip and making the connecting pipe import expose towards the side.

By adopting the technical scheme, after the external micro air pump is closed, the absorption liquid at the bottom of the pipe body flows back through the extension pipe due to the negative pressure state in the pipe body, at the moment, the sealing plug slides and butts against the end part of the connecting pipe under the action of the negative pressure and seals the connecting pipe, so that the anti-backflow suction pipe, the air inlet pipe and the extension pipe form an sealed cavity together, the air in the sealed cavity is not easy to exchange external air, the occurrence of the back suction condition is effectively reduced, if a detection person carelessly connects the connecting pipe and the air outlet pipe in an opposite mode, the sealing plug directly blocks the connecting pipe under the suction action of the micro air pump, the situation that the absorption liquid directly enters the micro air pump is avoided, and in the detection process, the sealing plug is far away from the connecting pipe under the suction action of the micro air pump, the touch part butts against the end part of the connecting pipe, and the inlet of the connecting pipe is exposed, so that the sealing plug is not easy to block the.

The utility model discloses step sets up to the of closing plug towards the intake pipe end body shaping have the slip inlay establish in the connecting tube elastic cone, the elastic cone is conical setting, the connecting tube is the pipe, the bottom surface diameter of elastic cone is greater than or equal to the internal diameter of connecting tube.

Through adopting above-mentioned technical scheme, when being the negative pressure in the body, the elasticity awl will slide and imbed in the connecting pipe, and simultaneously, the side of elasticity awl will take place deformation and support tightly in the connecting pipe inner wall for prevent that the interior gas of suck-back is difficult for taking place the exchange with the outside air, reduced the circumstances of suck-back and taken place.

The utility model discloses advance step and set up as be equipped with the binding face that inclines towards the anti-suck-back pipe on the end inner wall of anti-suck-back pipe orientation connecting pipe, when the elasticity awl stopped up in the connecting pipe, the binding face attached in the side of elasticity awl.

Through adopting above-mentioned technical scheme, after the elasticity awl slides and imbeds in the connecting tube, the binding face will laminate in the side of elasticity awl, has improved the area of contact of elasticity awl with prevent down the straw, prevents down that the intraductal gas of straw will be difficult for taking place the exchange with the outside air, has reduced the circumstances of suck-back and has taken place.

The utility model discloses step sets up to be that the piece of keeping out is body shaping at the semi-ellipsoid that the closing plug was held towards connecting pipe , and the intake pipe is the pipe.

Through adopting above-mentioned technical scheme, under the suction effect of miniature air pump, half ellipsoid will contradict in the tip of intake pipe, because of the intake pipe is the pipe, so half ellipsoid will not seal in the intake pipe completely to gaseous normal air admission in the sampling rifle has been guaranteed.

The step of the utility model is that the two ends of the anti-falling suction pipe are both fixed with elastic sleeves, and the two groups of elastic sleeves are respectively sleeved outside the connecting pipe and the air inlet pipe in a tightening way.

By adopting the technical scheme, the two groups of elastic sleeves are respectively sleeved outside the connecting pipe and the air inlet pipe in a tightening manner, so that the anti-backflow pipe can be detached from the connecting pipe and the air inlet pipe, and external air is not easy to enter the anti-backflow pipe.

The utility model discloses step sets up to be equipped with the depressed part that supplies elasticity cover tip embedding on the outer wall of connecting pipe and intake pipe.

Through adopting above-mentioned technical scheme, the embedding is in the elastic sleeve of depressed part and is in natural state, and the elastic sleeve that the tight cover was established outside connecting pipe and the intake pipe then is in deformation state, if will make the elastic sleeve break away from connecting pipe and intake pipe, then need draw the elastic sleeve of embedding in the depressed part to deformation state to the stability of being connected between anti-falling straw and connecting pipe, the intake pipe has been improved.

The utility model discloses step sets up to, the closure plug is cylindricly set up, and the internal diameter of preventing down the straw both ends department is less than the diameter of closure plug.

By adopting the technical scheme, the sealing plug is not easy to fall off from the anti-backflow pipe after the anti-backflow pipe is detached.

The utility model discloses step sets up as, the fixed cover is equipped with solid fixed ring outside the inlet tube, and the top of body is seted up and is supplied the mouth of pipe of solid fixed ring grafting.

Through adopting above-mentioned technical scheme, through pegging graft in the mouth of pipe with solid fixed ring, both guaranteed the sealed effect to the body, thereby can be convenient for add the absorption liquid in the body from the mouth of pipe with solid fixed ring in again.

To sum up, the utility model discloses following beneficial effect has:

1. the arrangement of the anti-backflow suction tube, the sealing plug and the abutting piece ensures that the absorption liquid at the bottom of the tube body is not easy to flow back into the sampling gun or the miniature air pump and ensures the normal introduction of the gas in the sampling gun;

2. the elastic sleeve is arranged, so that the anti-backflow pipe can be detached from the connecting pipe and the air inlet pipe, and external air is not easy to enter the anti-backflow pipe;

3. the arrangement of the fixing ring ensures the sealing effect of the tube body, and the fixing ring can be taken out from the tube opening, so that the absorption liquid can be added into the tube body conveniently.

Drawings

Fig. 1 is a schematic sectional structure view of an overall structure in an embodiment of the present invention;

fig. 2 is a partially enlarged schematic view at a in fig. 1.

In the figure: 1. a pipe body; 11. an air inlet pipe; 12. an air outlet pipe; 13. an extension pipe; 2. an anti-backflow straw; 21. a connecting pipe; 3. a closing plug; 31. an elastic cone; 32. a binding face; 33. a semi-ellipsoid; 4. an elastic sleeve; 41. a recessed portion; 5. a fixing ring; 51. a nozzle.

Detailed Description

The present invention will be described in further detail in with reference to the accompanying drawings.

As shown in fig. 1 and 2, anti-back suction air sampling pipes, including the body 1 that has intake pipe 11 and outlet duct 12, the bottom of body 1 contains the absorption liquid, the intercommunication has the extension 13 that stretches into in the absorption liquid on the intake pipe 11, that body 1 was kept away from to intake pipe 11 serves the intercommunication to have anti-back suction pipe 2, the end of that anti-back suction pipe 2 was kept away from in intake pipe 11 serves the intercommunication to have connecting pipe 21, connecting pipe 21 is connected in outside sampling rifle.

As shown in FIG. 2, the anti-falling straw 2 is slidably inserted with the sealing plug 3, the sealing plug 3 is made of rubber, the sealing plug 3 and the top of the inner wall of the anti-falling straw 2 are arranged at an interval, an end of the sealing plug 3 facing the air inlet pipe 11 is formed with an elastic cone 31 which is slidably inserted in the connecting pipe 21, the elastic cone 31 is made of rubber, the elastic cone 31 is arranged in a conical shape, the connecting pipe 21 is a circular pipe, and the bottom diameter of the elastic cone 31 is greater than or equal to the inner diameter of the connecting pipe 21. when the pipe body 1 is in a negative pressure state, the elastic cone 31 is slidably inserted in the connecting pipe 21 and abuts against the inner wall of the connecting pipe 21, so that the gas in the anti-falling straw 2 is not easy to exchange with the outside air, and.

As shown in fig. 2, an adhering surface 32 inclined toward the inside of the suck back prevention pipe 2 is arranged on the inner wall of the end of the suck back prevention pipe 2 facing the connection pipe 21, and when the elastic cone 31 is blocked by the connection pipe 21, the adhering surface 32 adheres to the side surface of the elastic cone 31, so that the contact area between the elastic cone 31 and the suck back prevention pipe 2 is increased, and the suck back situation is further reduced by .

As shown in FIG. 2, a contact part is arranged on the side of the closing plug 3 facing the air inlet pipe 11, the contact part is shaped as a semi-ellipsoid 33 on the end of the closing plug 3 facing the connecting pipe 21 , the air inlet pipe 11 is a circular pipe, under the suction action of the micro air pump, the elastic cone 31 is far away from the connecting pipe 21 and urges the semi-ellipsoid 33 to contact the end of the air inlet pipe 11, and the semi-ellipsoid 33 cannot be completely sealed in the air inlet pipe 11 because the air inlet pipe 11 is a circular pipe, thereby ensuring the normal air intake of the gas in the sampling gun.

As shown in fig. 2, the two ends of the falling prevention straw 2 are both fixed with elastic sleeves 4, the elastic sleeves 4 are made of rubber, and the two groups of elastic sleeves 4 are respectively sleeved outside the connecting pipe 21 and the air inlet pipe 11 in a tightening manner, so that the falling prevention straw 2 can be detached from the connecting pipe 21 and the air inlet pipe 11. The outer walls of the connecting pipe 21 and the air inlet pipe 11 are both provided with a concave part 41, and the end part of the elastic sleeve 4 is embedded into the concave part 41, so that the elastic sleeve 4 is not easy to separate from the connecting pipe 21 and the air inlet pipe 11.

As shown in fig. 2, the closing plug 3 is disposed in a cylindrical shape, and the inner diameters of the two ends of the anti-falling straw 2 are smaller than the diameter of the closing plug 3, so that the closing plug 3 is not easy to fall off from the anti-falling straw 2 after the anti-falling straw 2 is detached.

As shown in fig. 1, the outer fixing sleeve of the air inlet pipe 11 is provided with a fixing ring 5, the top of the pipe body 1 is provided with a pipe orifice 51 for the fixing ring 5 to be inserted, and the fixing ring 5 is taken out from the pipe orifice 51 so as to add the absorption liquid into the pipe body 1. The diameter of the fixing ring 5 is gradually reduced from top to bottom, so that the fixing ring 5 is more tightly embedded in the nozzle 51, and at the same time, the extension pipe 13 is not easy to touch the bottom wall of the pipe body 1 to affect the normal air inlet.

The implementation principle of the embodiment is as follows: in the detection process, under the suction effect of the miniature air pump, the semi-ellipsoid 33 will collide with the end part of the air inlet pipe 11, and simultaneously, the inlet of the air inlet pipe 11 will be exposed, so that the gas will sequentially pass through the connecting pipe 21, the anti-falling suction pipe 2, the air inlet pipe 11, the extension pipe 13 and the pipe body 1, and then the gas outlet pipe 12 is discharged.

After the external micro air pump is closed, because the interior of the tube body 1 is in a negative pressure state, the sealing plug 3 slides under the action of negative pressure to be close to the connecting tube 21, the elastic cone 31 is embedded into the connecting tube 21 and props against the binding surface 32, so that the anti-falling suction tube 2, the air inlet tube 11 and the extension tube 13 jointly form an sealed cavity, the air in the sealed cavity is not easy to exchange with the external air, and the occurrence of the back suction condition is effectively reduced.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

The utility model provides a prevent suck-back air sampling pipe, including body (1) that has intake pipe (11) and outlet duct (12), the bottom of body (1) holds and absorbs the liquid, intake pipe (11) are gone up the intercommunication has extension pipe (13) that stretches into in the absorption liquid, characterized by that, intake pipe (11) keep away from body (1) end on communicate with prevent suck-back pipe (2), prevent suck-back pipe (2) keep away from of intake pipe (11) and communicate on connecting pipe (21), connecting pipe (21) are connected in outside sampling rifle, prevent that to slide in suck-back pipe (2) and inlay and be equipped with under the negative pressure and slide the sealing plug (3) that seals in connecting pipe (21), sealing plug (3) and the top of preventing suck-back pipe (2) inner wall are the interval setting, and sealing plug (3) are equipped with the contact piece that contradicts in connecting pipe (21) tip and make connecting pipe (21) import expose to side of intake pipe (11).
2. The sample tube for preventing air from being sucked back as claimed in claim 1, wherein the end of the closing plug (3) facing the air inlet tube (11) is formed with an elastic cone (31) embedded in the connecting tube (21) in a sliding manner, the elastic cone (31) is arranged in a conical manner, the connecting tube (21) is a circular tube, and the diameter of the bottom surface of the elastic cone (31) is greater than or equal to the inner diameter of the connecting tube (21).
3. The sample tube for preventing air back suction according to claim 2, wherein the tube (2) has an engaging surface (32) inclined toward the interior of the tube (2) on the inner wall of the end facing the tube (21), and when the cone (31) is blocked by the tube (21), the engaging surface (32) engages with the side of the cone (31).
4. The sample tube for preventing suck-back of air is characterized in that the contact part is half ellipsoid (33) formed on the end of the closing plug (3) facing the connecting tube (21) , and the air inlet tube (11) is a circular tube.
5. The anti-suck-back air sampling tube of claim 1, wherein elastic sleeves (4) are fixed at both ends of the anti-suck-back tube (2), and the two groups of elastic sleeves (4) are respectively sleeved outside the connecting tube (21) and the air inlet tube (11) in a tightening manner.
6. The sample tube for preventing air back suction is characterized in that the connecting tube (21) and the air inlet tube (11) are provided with a concave part (41) for the end of the elastic sleeve (4) to be embedded in on the outer wall.
7. The sample tube for preventing suck-back of air is characterized in that the plug (3) is cylindrical, and the inner diameters of the two ends of the suck-back preventing tube (2) are smaller than the diameter of the plug (3).
8. The anti-suck-back air sampling tube of claim 1, wherein the air inlet tube (11) is fixedly sleeved with a fixing ring (5), and the top of the tube body (1) is provided with a tube orifice (51) for the fixing ring (5) to be inserted.