CN215115411U

CN215115411U - Negative pressure sampler with sample recovery function

Info

Publication number: CN215115411U
Application number: CN202121426041.9U
Authority: CN
Inventors: 朱健伟; 邵亚龙; 黄彦云
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-06-25
Filing date: 2021-06-25
Publication date: 2021-12-10
Anticipated expiration: 2031-06-25

Abstract

The utility model provides a negative pressure sampler with a sample recovery function, which comprises a needle cylinder; the needle cylinder is of a tubular structure, the front end of the needle cylinder is fixedly connected with the first needle cylinder, two groups of connectors are symmetrically arranged at the left end and the right end of the needle cylinder, and the connectors are connected with the collecting device; the front end of the second needle tube is provided with an internal thread, and the outer part of the rear end of the second needle tube is provided with an external thread. The utility model discloses in, through baffle and the articulated setting of cylinder front end curb plate for when the push-and-pull rod outwards stimulates, the inside vacuum environment that has formed of cylinder, cause the atmospheric pressure at both ends different inside and outside the baffle, gas in the container is inwards pushed the baffle open, then enter into inside the cylinder, after the cylinder is inside to be full of the gas of sampling, promote the push-and-pull rod forward, the baffle is laminated with the front end curb plate of cylinder under the gas pressure effect this moment, prevent that the sampling gas from flowing back inside the container.

Description

Negative pressure sampler with sample recovery function

Technical Field

The utility model belongs to the technical field of the sample collection, more specifically say, in particular to negative pressure sample thief with sample recovery function.

Background

Can produce industrial waste gas in industrial production, in order to carry out better innocent treatment to industrial waste gas, need sample waste gas, the composition of analysis waste gas the inside just needs to use the sample thief, in order to prevent that waste gas from discharging to the air, need adopt the negative pressure sample thief, prevents that waste gas from revealing.

Based on the above, the most adoption cylinder structure of current negative pressure sample thief, the length of cylinder front end needle tubing can not be adjusted, is not sampling the great container of thickness to the in-process of sampling, during external air permeates the receiving flask easily, causes the gaseous quality of sample impure.

Therefore, in view of the above, research and improvement are made on the existing structure and defects, and a negative pressure sampler with a sample recovery function is provided, so as to achieve the purpose of higher practical value.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides a negative pressure sample thief with sample recovery function to solve the most syringe structures that adopt of current negative pressure sample thief, the length of syringe front end needle tubing can not be adjusted, does not have and samples to the great container of thickness, and the in-process of sampling, during external air permeates the receiving flask easily, causes the impure problem of sample gas quality.

The utility model relates to a purpose and efficiency of negative pressure sample thief with sample recovery function is reached by following specific technological means: a negative pressure sampler with a sample recovery function comprises a needle cylinder;

the needle cylinder is of a tubular structure, the front end of the needle cylinder is fixedly connected with the first needle cylinder, two groups of connectors are symmetrically arranged at the left end and the right end of the needle cylinder and are connected with the collecting device, the limiting plate is arranged inside the needle cylinder and is positioned on the left side of the connectors;

the front end of the second needle tube is provided with internal threads, the outer part of the rear end of the second needle tube is provided with external threads, the front end of the second needle tube is in threaded connection with the first needle tube, and the rear end of the second needle tube is in threaded connection with the third needle tube;

furthermore, the front end of the third needle tube is fixedly connected with the needle head, the needle head is of a conical structure, and an air inlet is annularly formed in the outer end surface of the third needle tube.

Furthermore, a baffle is arranged at the connecting port of the needle cylinder and the first needle tube, the baffle is of a rectangular structure, and the upper end of the baffle is hinged with the side plate of the front end of the needle cylinder.

Furthermore, arc strips are uniformly arranged at the outer end of the needle cylinder and are fixed on the outer end face of the needle cylinder in an annular shape.

Furthermore, the inside of the needle cylinder is provided with two groups of sliding plates, the outer end surfaces of the sliding plates are attached to the inner end surface of the needle cylinder, the push-pull rod is fixedly connected with the two groups of sliding plates, and the outer end of the push-pull rod penetrates through a side plate at the rear end of the needle cylinder and is fixedly connected with the handle.

Further, the collecting device includes:

the connecting hose is sleeved at the outer end of the connector;

the collecting bottle is communicated with the connecting hose, and water is filled in the collecting bottle;

the drain pipe is located the collecting bottle upper end, and the drain pipe is U type structure.

Compared with the prior art, the utility model discloses following beneficial effect has:

the utility model discloses in, second needle tubing front end is equipped with the internal thread, and second needle tubing rear end outside is equipped with the setting of external screw thread, can prolong the length of cylinder front end totality needle tubing through the quantity that increases the second needle tubing to can sample the container of different thickness.

Through the setting of third needle tubing front end syringe needle for the toper structure for the outer wall of broken container that the syringe needle can be easier, and the air inlet is located the outer terminal surface of third needle tubing, and inside gas in the container can enter into the cylinder through third needle tubing, avoided appearing the condition that the air inlet is blockked up.

Through baffle and syringe front end curb plate articulated setting for when the push-pull rod outwards pulling, the syringe is inside to have formed a vacuum environment, causes the atmospheric pressure difference at the inside and outside both ends of baffle, and the gas in the container inwards pushes away the baffle, then enters into inside the syringe, is full of the gas of sampling when the syringe is inside, promotes the push-pull rod forward, and the baffle is laminated with the front end curb plate of syringe under the gas pressure effect this moment, prevents that the sampling gas from flowing back inside the container.

Through the inside setting that fills water of collecting bottle for the inside back of collecting bottle is got into to the sampling gas, and the inside water of collecting bottle can be discharged through the drain pipe of upper end, and the drain pipe is U type structure, makes after the collecting bottle is inside to be full of the sampling gas, still remains some water in the drain pipe, thereby separates the gas in the collecting bottle with external air, has guaranteed the gaseous purity of sample.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

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

Fig. 3 is an enlarged schematic view of a portion a in fig. 2 according to the present invention.

Fig. 4 is a schematic view of the structure of the collection bottle of the present invention.

Fig. 5 is a schematic view of a second syringe according to the present invention.

Fig. 6 is a schematic view of the structure of the connection hose of the present invention.

In the drawings, the corresponding relationship between the component names and the reference numbers is as follows:

1. a needle cylinder; 101. an arc-shaped strip; 102. a limiting plate; 103. a connector; 2. a first needle tube; 201. a second needle tube; 3. a third needle tube; 301. a needle head; 302. an air inlet; 4. a sliding plate; 401. a push-pull rod; 5. a baffle plate; 6. a connecting hose; 7. a collection bottle; 701. and a water discharge pipe.

Detailed Description

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

In the description of the present invention, "a plurality" means two or more unless otherwise specified; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example (b):

as shown in figures 1 to 6:

the utility model provides a negative pressure sampler with sample recovery function, which comprises a needle cylinder 1;

the needle cylinder 1 is of a tubular structure, the front end of the needle cylinder 1 is fixedly connected with the first needle cylinder 2, two groups of connectors 103 are symmetrically arranged at the left end and the right end of the needle cylinder 1, the connectors 103 are connected with the collecting device, a limiting plate 102 is arranged inside the needle cylinder 1, and the limiting plate 102 is located on the left side of the connectors 103;

the front end of the second needle tube 201 is provided with internal threads, the outer part of the rear end of the second needle tube 201 is provided with external threads, the front end of the second needle tube 201 is in threaded connection with the first needle tube 2, and the rear end of the second needle tube 201 is in threaded connection with the third needle tube 3;

wherein, 3 front ends of third needle tubing and syringe needle 301 fixed connection, syringe needle 301 is the toper structure, 3 outer end surface rings of third needle tubing are equipped with air inlet 302, in use, 3 front ends of third needle tubing 301 are the setting of toper structure, make syringe needle 301 can be easier break the outer wall of container, and air inlet 302 is located the outer terminal surface of third needle tubing 3, gas in the container can enter into syringe 1 inside through third needle tubing 3, avoid appearing the condition that air inlet 302 is blockked up, and simultaneously, the lateral wall of some containers is thicker, be equipped with the internal thread through second needle tubing 201 front end, the outside setting that is equipped with the external screw thread of second needle tubing 201 rear end, can be through increasing the quantity of second needle tubing 201, prolong the overall length of 1 front end of syringe, thereby the commonality of device has been strengthened.

Wherein, 1 outer end align to grid of cylinder has arc strip 101, arc strip 101 is the annular and fixes the outer terminal surface at cylinder 1, in use, the workman is through cylinder 1 when collecting gas, because cylinder 1 is the cylinder structure for frictional force between workman's hand and cylinder 1 is less, the phenomenon of skidding appears easily, through 1 outer end align to grid of cylinder has arc strip 101's setting, can increase the frictional force between workman's hand and cylinder 1, the operation of the workman of being convenient for.

Wherein, the inside of the syringe 1 is provided with two groups of sliding plates 4, the sliding plates 4 are symmetrically provided with two groups, the outer end surfaces of the sliding plates 4 are jointed with the inner end surface of the syringe 1, the push-pull rod 401 is fixedly connected with the two groups of sliding plates 4, the outer end of the push-pull rod 401 passes through the side plate at the rear end of the syringe 1 and is fixedly connected with the handle, the joint of the syringe 1 and the first syringe 2 is provided with a baffle plate 5, the baffle plate 5 is in a rectangular structure, the upper end of the baffle plate 5 is hinged with the side plate at the front end of the syringe 1, in use, when gas sampling is carried out, the push-pull rod 401 can be pulled outwards, the push-pull rod 401 drives the sliding plate 4 at the front end to move outwards, so that a vacuum environment is formed inside the syringe 1, the air pressures at the inner end and the outer end of the baffle plate 5 are different, under the action of the air pressure, the baffle plate 5 is pushed inwards and then enters the inside of the syringe 1, the outer end surface of the sliding plate 4 is jointed with the inner end surface of the syringe 1, the tightness of the device is enhanced, the purity of the sample is ensured, after the needle cylinder 1 is filled with the sampled gas, the push-pull rod 401 is pushed forwards, the baffle plate 5 is attached to the front end side plate of the needle cylinder 1 under the action of gas pressure, the sampled gas is prevented from flowing back to the inside of the container, and the sampled gas is discharged through the connectors 103 at the two ends of the needle cylinder 1.

Wherein, the collecting device comprises a connecting hose 6, and the connecting hose 6 is sleeved at the outer end of the connector 103; the collecting bottle 7 is communicated with the connecting hose 6, and water is filled in the collecting bottle 7; drain pipe 701, drain pipe 701 is located collecting bottle 7 upper end, and drain pipe 701 is the U type structure, in use, collecting bottle 7 passes through coupling hose 6 and connector 103 intercommunication, the inside sample gas of syringe 1 that makes can enter into inside collecting bottle 7 through coupling hose 6, and collecting bottle 7 is inside to be filled with water, after sample gas enters inside collecting bottle 7, the inside water of collecting bottle 7 can discharge through drain pipe 701 of upper end, and drain pipe 701 is the U type structure, after making collecting bottle 7 is inside to be filled with sample gas, still remain some water in drain pipe 701, thereby separate the gas in collecting bottle 7 with the air of external world, the purity of sample gas has been guaranteed.

The specific use mode and function of the embodiment are as follows:

in the utility model, when sampling the gas in the container, the side wall of some containers is thicker, the front end of the second needle tube 201 is provided with an internal thread, the outside of the rear end of the second needle tube 201 is provided with an external thread, the length of the whole needle tube at the front end of the needle tube 1 can be prolonged by increasing the number of the second needle tubes 201, the front end needle head 301 of the third needle tube 3 is of a conical structure, so that the needle head 301 can break the outer wall of the container more easily, and the air inlet 302 is positioned on the outer end face of the third needle tube 3, the gas in the container can enter the needle tube 1 through the third needle tube 3, the condition that the air inlet 302 is blocked is avoided, when collecting the gas through the needle tube 1, because the needle tube 1 is of a cylindrical structure, the friction between the hand of a worker and the needle tube 1 is smaller, the phenomenon of slipping easily occurs, the arrangement of arc-shaped strips 101 is uniformly arranged at the outer end of the needle tube 1, the friction force between the hands of a worker and the needle cylinder 1 can be increased, the operation of the worker is facilitated, when gas sampling is carried out, the push-pull rod 401 can be pulled outwards, the push-pull rod 401 drives the sliding plate 4 at the front end to move outwards, so that a vacuum environment is formed inside the needle cylinder 1, the air pressures at the inner end and the outer end of the baffle plate 5 are different, the baffle plate 5 is pushed inwards by the gas in a container under the action of the gas pressure and then enters the needle cylinder 1, the outer end face of the sliding plate 4 is attached to the inner end face of the needle cylinder 1, the sealing performance of the device is enhanced, the purity of a sample is ensured, when the interior of the needle cylinder 1 is filled with the sampled gas, the push-pull rod 401 is pushed forwards, at the moment, the baffle plate 5 is attached to the front end side plate of the needle cylinder 1 under the action of the gas pressure, the sampled gas is prevented from flowing back to the interior of the container, and the sampled gas is discharged through the connectors 103 at the two ends of the needle cylinder 1, then enter the inside of collecting bottle 7 through connecting hose 6 to collecting bottle 7 is inside to fill with water, and after the sampling gas entered collecting bottle 7 inside, the inside water of collecting bottle 7 can be discharged through drain pipe 701 of upper end, and drain pipe 701 is the U type structure, makes after collecting bottle 7 is inside to be filled with the sampling gas, still remains some water in drain pipe 701, thereby separates the gas in collecting bottle 7 with the air of external world, has guaranteed the purity of sample gas.

The embodiments of the present invention have been presented for purposes of illustration and description, and are not intended to be exhaustive or limited to the invention in the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiment was chosen and described in order to best explain the principles of the invention and the practical application, and to enable others of ordinary skill in the art to understand the invention for various embodiments with various modifications as are suited to the particular use contemplated.

Claims

1. The utility model provides a negative pressure sample thief with sample recovery function which characterized in that: comprises a needle cylinder (1);

the needle cylinder (1) is of a tubular structure, the front end of the needle cylinder (1) is fixedly connected with the first needle cylinder (2), two groups of connectors (103) are symmetrically arranged at the left end and the right end of the needle cylinder (1), and the connectors (103) are connected with the collecting device;

the needle tube structure comprises a second needle tube (201), wherein the front end of the second needle tube (201) is provided with an internal thread, and the outer part of the rear end of the second needle tube (201) is provided with an external thread.

2. The negative pressure sampler having a sample recovery function as claimed in claim 1, wherein: arc strips (101) are uniformly arranged at the outer end of the needle cylinder (1), and the arc strips (101) are fixed on the outer end face of the needle cylinder (1) in an annular shape.

3. The negative pressure sampler having a sample recovery function as claimed in claim 1, wherein: the front end of the second needle tube (201) is in threaded connection with the first needle tube (2), and the rear end of the second needle tube (201) is in threaded connection with the third needle tube (3).

4. The negative pressure sampler having a sample recovery function as claimed in claim 3, wherein: the front end of the third needle tube (3) is fixedly connected with the needle head (301), the needle head (301) is of a conical structure, and an air inlet (302) is annularly formed in the surface of the outer end of the third needle tube (3).

5. The negative pressure sampler having a sample recovery function as claimed in claim 1, wherein: the needle cylinder (1) is provided with a baffle (5) at the connecting port of the first needle tube (2), the baffle (5) is of a rectangular structure, and the upper end of the baffle (5) is hinged with the side plate at the front end of the needle cylinder (1).

6. The negative pressure sampler having a sample recovery function as claimed in claim 1, wherein: the novel syringe is characterized in that sliding plates (4) are arranged inside the syringe (1), two groups of sliding plates (4) are symmetrically arranged, the outer end faces of the sliding plates (4) are attached to the inner end faces of the syringe (1), the push-pull rod (401) is fixedly connected with the two groups of sliding plates (4), and the outer end of the push-pull rod (401) penetrates through the rear end side plate of the syringe (1) and is fixedly connected with the handle.

7. The negative pressure sampler having a sample recovery function as claimed in claim 1, wherein: the collecting device comprises:

the connecting hose (6), the connecting hose (6) is sleeved at the outer end of the connector (103);

the collecting bottle (7), the collecting bottle (7) is communicated with the connecting hose (6), and water is filled in the collecting bottle (7).

8. The negative pressure sampler having a sample recovery function as claimed in claim 1, wherein: the collecting device further comprises a water drain pipe (701), the water drain pipe (701) is located at the upper end of the collecting bottle (7), and the water drain pipe (701) is of a U-shaped structure.

9. The negative pressure sampler having a sample recovery function as claimed in claim 1, wherein: a limiting plate (102) is arranged in the needle cylinder (1), and the limiting plate (102) is positioned on the left side of the connector (103).