CN214309768U - Sampling tube for gas detection - Google Patents
Sampling tube for gas detection Download PDFInfo
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- CN214309768U CN214309768U CN202023101892.4U CN202023101892U CN214309768U CN 214309768 U CN214309768 U CN 214309768U CN 202023101892 U CN202023101892 U CN 202023101892U CN 214309768 U CN214309768 U CN 214309768U
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- hose
- sampling tube
- flexible sleeve
- central
- gas detection
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Abstract
The utility model discloses a sampling tube for gas detection for draw for the automobile exhaust detects with gas, the sampling tube includes central hose, flexible sleeve, the gas of central hose inner wall circulation extraction central hose outer suit flexible sleeve, central hose with flexible sleeve sets reset spring in axial direction and realizes the reseing after the sampling tube is crooked in order to provide the moment of torsion, the polytetrafluoroethylene hose is chooseed for use to the central hose. The utility model provides a resistant buckle, the resilience is strong, processes the sampling tube for gas detection that more convenient and fast and life obviously promoted.
Description
Technical Field
The utility model relates to an automobile exhaust tail gas sampling technical field, concretely relates to sampling tube for gas detection.
Background
When the component content of the automobile exhaust is detected, a direct measurement method cannot be adopted due to overhigh measurement environment temperature of the automobile exhaust discharge pipe, and a method of sampling firstly and then detecting is adopted for detection. The sampling device can be used usually during sampling, and conventional sampling measurement is generally applied to power plants or steel plants, and the flue sampling space of the power plants or the steel plants is large, so that the sampling device does not need to be bent. But in the automobile exhaust detection field, owing to need go deep into the tail gas delivery pipe, just often need buckle when the sampling tube goes deep into the automobile exhaust delivery pipe during the sample and just can realize taking a sample, this just needs the sampling tube to realize buckling to satisfy the needs that gas detected.
In the prior art, in order to meet the requirement of sampling automobile exhaust, a sampling pipe needs to resist high temperature and corrosion or produce CO to be tested by a review method2\CO\NOx\HC\O2The sampling pipe comprises a two-layer structure, the inner layer is a metal pipe due to overhigh sampling temperature, and the metal pipe is wrapped by a metal corrugated pipe to complete the bending of the sampling pipe. The metal pipes at the two ends of the sampling pipe are fixedly connected with the metal corrugated pipe in a welding mode. In the sampling tube for gas detection in the prior art, the inner layer of metal tube has poor flexibility and can be bent for multiple times in use, so that the inner tube wall is easy to crack; and because the resilience of the inner metal tube is poor, the whole sampling tube is bent and cannot return to straight after sampling easily. In addition, because the metal corrugated pipe is fixedly connected with the two ends of the inner metal pipe in a welding manner, the sampling pipe is difficult to process, the welding process is required to be high, otherwise, the connection part is easy to break or have a leak, and the sampling pipe is easy to leak. Based on these practical conditions, the service life of the sampling probe using the sampling tube in the prior art is extremely low, and the service life of each sampling probe is about 1-2 weeks.
Disclosure of Invention
In order to solve the technical problem, the utility model provides a resistant buckle, the resilience is strong, processes the sampling tube for gas detection of more convenient and fast and life obviously promotes.
In order to realize the above-mentioned purpose, the utility model discloses a sampling tube for gaseous detecting for draw automobile exhaust and detect with gas, the sampling tube includes central hose, flexible sleeve, the gas of central hose inner wall circulation extraction central hose outer suit flexible sleeve, central hose with the flexible sleeve sets reset spring in the axial direction and realizes reseing after the sampling tube is crooked in order to provide the moment of torsion, the polytetrafluoroethylene hose is chooseed for use to the central hose.
Preferably, the flexible sleeve is made of stainless steel;
or the flexible sleeve is a threading pipe;
or the flexible sleeve is a braided tube.
Preferably, the return spring is disposed between the central hose and the flexible sleeve such that the return spring is in a restrained state to achieve a stable and reliable return.
Preferably, the sampling tube is connected with the hose air-taking head at one end of the air inlet in a sealing way, and is connected with the hose connector at one end of the air outlet in a sealing way, and two ends of the sampling tube are respectively fixed with the hose air-taking head and the hose connector in a buckling way in the radial direction through buckling sleeves.
Preferably, the hose gas taking head comprises a sampling probe and a gas taking head base end part connected with the end part of the sampling tube, the base end part is provided with a connecting joint, the connecting joint is introduced into an inner cavity of the central software, and the buckling sleeve hoops the flexible sleeve, the central hose and the connecting joint to realize the closed connection.
Preferably, the base end part further comprises a plugging ring which is tightly pressed against the nozzle of the sampling tube to realize further sealing of the sleeve, the central hose and the connecting joint.
Preferably, the hose nipple is also provided with the base end portion.
Compared with the prior art, the beneficial effects of the utility model are that:
firstly, the processing is more convenient, and the pressing machine can directly press;
secondly, the spring is more resistant to bending, the resilience is increased, and the spring basically keeps straight in the life cycle;
and thirdly, the service life of the sampling tube is prolonged, the effect is obviously improved, the actual service life is prolonged by at least six times within 3-6 months.
Drawings
Fig. 1 is a schematic structural view of the present invention;
in the drawings, a hose air intake head 1; a sampling probe 101; a base end portion 102; a connection joint 103; a sealing ring 104; buckling and pressing the sleeve 2; a central hose 3; a flexible sleeve 4; a return spring 5; a hose connector 6.
Detailed Description
The present invention will be further explained with reference to the drawings and examples.
Example 1
As shown in fig. 1, the utility model discloses a sampling tube for gas detection for draw for automobile exhaust detects gas, the sampling tube includes central hose 3 and flexible sleeve 4, the gas of 3 inner wall circulations of central hose extraction 3 outer suit of central hose 4, central hose 3 with flexible sleeve 4 sets reset spring 5 in axial direction in order to provide the moment of torsion and realize the restoration after the sampling tube is crooked, polytetrafluoroethylene pipe is chooseed for use to central hose.
The utility model discloses in, polytetrafluoroethylene pipe is chooseed for use to central hose 3, utilizes polytetrafluoroethylene material high temperature resistant, heat-resisting, ageing-resistant, self-lubricating performance excellence and the characteristics such as hydroscopicity, can replace the tubular metal resonator among the prior art with sample automobile exhaust, utilizes the compression resilience performance of polytetrafluoroethylene pipe again to provide the condition for the sampling tube tip is withheld tightly and is sealed, has changed the tubular metal resonator among the prior art and can only be through the current situation of easy fracture or the easy gas leakage of fixed bringing of welded seal connection in the sampling tube.
The utility model discloses in, flexible sleeve 4 and reset spring 5 are assembled outside central hose 3, and flexible sleeve 4 is able to bear or endure to buckle more, and reset spring increases the resilience, can realize the reseing after the sampling tube is crooked fast, can keep the sampling tube to keep going straight in life cycle, also can effectively avoid the sampling tube to buckle many times and then the rupture that causes, increase the life of sampling tube.
The utility model discloses well flexible sleeve 4 chooses for use stainless steel, utilizes the high corrosion resistance of stainless steel for the sampling tube can be used to ophthalmology's environment, has fire-resistant, heat resistance, can resist the scale deposit and keep intensity under high temperature, and the leakproofness is good, and the processing degree of difficulty is low and with low costs.
The flexible sleeve 4 is a threading pipe; or the flexible sleeve 4 is a braided tube.
The return spring 5 is arranged between the central hose 3 and the flexible sleeve 4, so that the return spring 5 is in a restrained state to achieve a stable and reliable return.
Alternatively, the return spring 5 may be disposed on the outer wall of the flexible sleeve 4 to return the bent sampling tube to the straight position.
The sampling tube is at air inlet one end sealing connection hose head of getting 1, at gas outlet one end sealing connection hose nipple 6, the sampling tube both ends respectively with hose head of getting 1 and hose nipple 6 are withheld the cover 2 through withholding and are withheld fixedly in radial direction.
The utility model discloses in, adopt to detain and press 2 cramp sample pipe end portion and hose to get the head 1 of breathing freely of cover, and through cramping 2 cramp sample pipe end portions of cover and hose nipple 6, sealed fixed processing is more convenient, detains to press 2 choosedly to press the machine for use and directly withhold and cramp can.
The hose gas taking head 1 comprises a sampling probe 101 and a gas taking head base end part 102 connected with the end part of the sampling tube, the base end part 102 is provided with a connecting joint 103, the connecting joint 103 is communicated with the inner cavity of the central hose 3, the buckling and pressing sleeve 2 clamps the flexible sleeve 4, the central hose 3 and the connecting joint 103 to realize the closed connection, and the buckling and pressing sleeve does not clamp the return spring.
The utility model discloses in, the attach fitting 103 that base end portion 102 set up gos deep into the inner chamber of central hose 3, the outer wall of attach fitting 103 and the inner wall contact of central hose 3 to cramp through withholding cover 2, attach fitting 103 through outer wall with the sealing connection of 3 inner wall walls of central hose passing surface, compare in the tubular metal resonator among the prior art and outside corrugated metal pipe compare at tip welded seal's sealing washer, sealed effect is better, and is sealed more stable, can effectively avoid producing the gas leakage of sampling tube tip, promotes the sample effective rate of sampling tube.
The buckling sleeve does not hoop the return spring. When the sealing of the connecting joint 103 and the central hose 3 is realized, the looseness of sealing installation caused by the resetting movement of the return spring 5 is effectively avoided, and the sealing effect is ensured.
The crimping sleeve 2 covers the end of the return spring 5 in the axial direction. The end part of the return spring 5 is further buckled and covered by the buckling and pressing sleeve 2, so that the abrasion of the flexible sleeve 4 caused by the return spring 5 is reduced. The cover 2 withholds the tip of 5 of reset spring simultaneously for reset spring 5's resilience force is better, makes the sampling tube reset and returns straight more stable.
The base end part 102 further comprises a plugging ring 104, and the plugging ring 104 tightly props against the nozzle of the sampling tube to further seal the flexible sleeve 4, the central hose 3 and the connecting joint 103.
The sampling tube is provided with a hose connector 6 at one end of the air outlet, the hose connector 6 is also provided with the base end part 102, and the base end part 102 of the hose connector 6 has the same structure and the same effect as the base end part 102 of the sampling probe 101.
Finally, it should be noted that the above-mentioned embodiments are only specific embodiments of the present invention. Obviously, the present invention is not limited to the above embodiments, and many modifications are possible. All modifications which can be derived or suggested by a person skilled in the art from the disclosure of the invention should be considered as within the scope of the invention.
Claims (8)
1. The utility model provides a sampling tube for gas detection for draw gas for automobile exhaust detects, its characterized in that: the sampling tube comprises a central hose and a flexible sleeve, wherein the inner wall of the central hose is filled with extracted gas, the flexible sleeve is sleeved outside the central hose, the central hose and the flexible sleeve are provided with a return spring in the axial direction to provide torque to realize the return of the sampling tube after bending, and the central hose is a polytetrafluoroethylene hose.
2. A gas detection coupon as defined in claim 1, wherein: the flexible sleeve is made of stainless steel;
or the flexible sleeve is a threading pipe;
or the flexible sleeve is a braided tube.
3. A gas detection coupon as defined in claim 1, wherein: the return spring is arranged between the central hose and the flexible sleeve, so that the return spring is in a limiting state to realize the return stably and reliably.
4. A gas detection coupon as defined in any one of claims 1-3, further comprising: the sampling tube is at air inlet one end sealing connection hose head of getting, at air outlet one end sealing connection hose nipple, the sampling tube both ends respectively with hose head of getting and hose nipple are fixed through withholding the cover in the radial direction withholding formula.
5. A gas detection coupon as defined in claim 4, wherein: the hose gas taking head comprises a sampling probe and a gas taking head base end part connected with the end part of the sampling tube, the base end part is provided with a connecting joint, the connecting joint is introduced into an inner cavity of the central software, the buckling and pressing sleeve hoops the flexible sleeve, the central hose and the connecting joint to realize the closed connection, and the buckling and pressing sleeve does not hoop the return spring.
6. A gas detection coupon as defined in claim 5, wherein: the buckling sleeve covers the end part of the return spring in the axial direction.
7. A gas detection coupon as defined in claim 5, wherein: the basal end part also comprises a plugging ring which is tightly propped against the orifice of the sampling tube to realize the further sealing of the flexible sleeve, the central hose and the connecting joint.
8. A gas detection coupon as defined in any one of claims 5-7, further comprising: the hose nipple is also provided with the base end portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023101892.4U CN214309768U (en) | 2020-12-21 | 2020-12-21 | Sampling tube for gas detection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023101892.4U CN214309768U (en) | 2020-12-21 | 2020-12-21 | Sampling tube for gas detection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214309768U true CN214309768U (en) | 2021-09-28 |
Family
ID=77859179
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023101892.4U Active CN214309768U (en) | 2020-12-21 | 2020-12-21 | Sampling tube for gas detection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214309768U (en) |
-
2020
- 2020-12-21 CN CN202023101892.4U patent/CN214309768U/en active Active
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