CN216082225U

CN216082225U - Electric valve type sampler

Info

Publication number: CN216082225U
Application number: CN202122670741.9U
Authority: CN
Inventors: 苏正军; 陈保卫
Original assignee: Chinese Academy of Meteorological Sciences CAMS
Current assignee: Chinese Academy of Meteorological Sciences CAMS
Priority date: 2021-11-03
Filing date: 2021-11-03
Publication date: 2022-03-18
Anticipated expiration: 2031-11-03
Also published as: GB202216187D0; GB2612704A; GB2612704B

Abstract

The utility model discloses a valve-operated sampler, comprising: a carrier; a sampling cylinder arranged on the carrier; the plunger is arranged in the sampling cylinder and can move along the axial direction of the sampling cylinder; and the driving mechanism is arranged on the carrier and is used for driving the plunger to move along the axial direction of the sampling cylinder. In this scheme, drive the plunger through actuating mechanism and make reciprocating motion in the sampler barrel to in the automatic extraction of having realized the appearance gas, have characteristics such as the sampling efficiency is high, the sample stability is good and the sampling precision is high moreover.

Description

Electric valve type sampler

Technical Field

The utility model relates to the technical field of samplers, in particular to a motorized valve type sampler.

Background

The need to inject a reaction sample gas into a reaction vessel is often encountered in meteorological and other discipline laboratory studies. Typically, medical syringes or graduated manual aspiration pumps are used to perform the sampling task.

However, the syringe is manually operated, so that the stability is poor, and human errors are introduced due to different operation habits of different personnel during operation, so that the sampling precision is low; also, sometimes metal pumps are used, which may cause loss of sample gas due to electrostatic adsorption; and the injector is not easy to be closed, the opening of the injector has no sealing measure, and the sampling capacity of the injector is limited.

SUMMERY OF THE UTILITY MODEL

In view of the above, the present invention provides a valve-type sampler, in which a driving mechanism drives a plunger to reciprocate in a sampling cylinder, so as to realize automatic sampling of sample gas, and the valve-type sampler has the characteristics of high sampling efficiency, good sampling stability, high sampling precision, and the like.

In order to achieve the purpose, the utility model provides the following technical scheme:

a motorized valve sampler comprising:

a carrier;

a sampling tube disposed on the support;

the plunger is arranged in the sampling cylinder and can move along the axial direction of the sampling cylinder;

and the driving mechanism is arranged on the carrier and is used for driving the plunger to move along the axial direction of the sampling cylinder.

Preferably, the sampling cylinder is a quartz glass sampling cylinder.

Preferably, the plunger comprises a leather cup and a guide post;

the periphery wall of guide post with the interior perisporium laminating of sampler barrel, the first end of guide post with the leather cup is connected, the second end with actuating mechanism's expansion end is connected, the periphery of leather cup with the interior perisporium contact cooperation of sampler barrel.

Preferably, the leather cup is a double-layer leather cup along the axial direction of the leather cup.

Preferably, the plunger further comprises:

set up along circumference in the clearance between the double-deck leather cup, and be used for with the internal perisporium contact complex sealing liquid of sampler barrel.

Preferably, the carrier is a handheld carrier, and the driving mechanism is disposed in the handheld carrier.

Preferably, the hand-held carrier comprises a front end cap, a handle housing and a connecting frame;

the first end of the connecting frame is connected with the front end cover, and the second end of the connecting frame is connected with the handle shell; the first end of the sampling tube is connected to the front end cover, and the second end of the sampling tube is connected to the handle shell and is supported by the connecting frame; the driving mechanism is arranged in the handle shell, and a control switch of the driving mechanism is positioned outside the handle shell.

Preferably, the front end cover is provided with an inlet and an outlet communicated with the first end of the sampling cylinder;

the motorized valve sampler further comprising:

and the electromagnetic valve is arranged in the front end cover and is used for controlling the opening and closing of the inlet and the outlet.

Preferably, the drive mechanism comprises an electric lead screw assembly.

Preferably, the electric lead screw assembly includes: the device comprises a lead screw assembly, a motor transmission assembly, a switch assembly and a battery assembly;

the lead screw assembly comprises a lead screw and a nut; the nut is arranged in the handle shell; the first end of the screw rod penetrates through the second end of the sampling cylinder and is positioned in the sampling cylinder to be connected with the plunger, the second end of the screw rod is positioned outside the handle shell, and the middle part of the screw rod is matched with the nut; the motor transmission assembly is arranged in the handle shell and used for driving the nut to rotate; the switch assembly is arranged outside the handle shell and is electrically connected with the motor transmission assembly; the battery pack is arranged on the handle shell and is respectively electrically connected with the motor transmission assembly and the switch assembly.

According to the technical scheme, the electric valve type sampler provided by the utility model drives the plunger to reciprocate in the sampling cylinder through the driving mechanism, so that the automatic sampling of the sample gas is realized, and the electric valve type sampler has the characteristics of high sampling efficiency, good sampling stability, high sampling precision and the like.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a solenoid valve sampler provided in an embodiment of the present invention;

FIG. 2 is a schematic diagram of a drive engagement of a lead screw assembly provided in an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a lead screw according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a lead screw positioning sleeve provided in an embodiment of the present invention.

The device comprises a handle shell 1, a lithium battery 2, a switch 3, a reversing switch 4, a speed reducer shell 5, a direct current motor 6, a main gear 7, a driven gear set 8, a lead screw 9, a rear connector assembly 10, a first connection transition threaded sleeve 11, a sampling cylinder 12, a scale mark 13, a connecting frame 14, a connecting block 15, a front end cover 16, an electromagnetic valve 17, a leather cup 18, a guide column 19, a lock nut 20, a multi-head nut 21, a second connection transition threaded sleeve 22, a sealing liquid 23, a sampling interface 24, an inlet and an outlet 25, a nut 26, a copper bush bearing 27, a reduction gearbox main body 28 and a lead screw positioning sleeve 29.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1, a valve-type sampler provided in an embodiment of the present invention includes:

a carrier;

a sampling tube 12 disposed on the support;

a plunger disposed in the sampling tube 12 and movable in the axial direction of the sampling tube 12;

and a driving mechanism arranged on the carrier and used for driving the plunger to move along the axial direction of the sampling cylinder 12.

It should be noted that the carrier is used as a frame body of the sampler, and is used for installing the sampling cylinder 12 and the driving mechanism; in addition, the outer wall of the sampling tube 12 is provided with scale marks 13, and a first end (such as the right end of the sampling tube 12 in fig. 1) thereof is of an open structure and serves as a sampling end of the sampling tube 12; in addition, the plunger can move back and forth along the axial direction of the sampling cylinder 12 so as to realize the suction and extraction of the sample gas; of course, as shown in FIG. 1, the drive mechanism is located on the side of the second end of the sampling cylinder 12 (e.g., the left end of the sampling cylinder 12 in FIG. 1) to better effect the reciprocating movement of the plunger.

According to the technical scheme, the electric valve type sampler provided by the embodiment of the utility model drives the plunger to reciprocate in the sampling cylinder through the driving mechanism so as to realize automatic sampling of the sample gas, and has the characteristics of high sampling efficiency, good sampling stability, high sampling precision and the like.

In this embodiment, the sampling tube 12 is a quartz glass sampling tube. Therefore, the structural strength of the sampling cylinder 12 is ensured, the sampling cylinder is not easy to damage, and the electrostatic adsorption cylinder wall can be avoided, so that the problem of inaccurate sample gas quantification caused by the electrostatic adsorption cylinder wall is solved.

Specifically, as shown in fig. 1, the plunger includes a cup 18 and a guide post 19;

the peripheral wall of the guide column 19 is attached to the inner peripheral wall of the sampling cylinder 12, the first end of the guide column 19 is connected with the leather cup 18, and the second end of the guide column is connected with the movable end of the driving mechanism; in this way, the guide reciprocating motion of the leather cup 18 in the sampling tube 12 is realized, so that the reciprocating motion of the leather cup 18 is more stable and smooth; the outer periphery of the leather cup 18 is in contact fit with the inner peripheral wall of the sampling tube 12, so that the outer periphery of the leather cup 18 and the inner peripheral wall of the sampling tube 12 achieve a dynamic sealing effect, and the sealing performance of the working area of the sampling tube 12 is guaranteed. That is to say, the plunger of this scheme so designs, has simple structure, moves characteristics such as smooth and easy and the leakproofness is good.

Further, in order to achieve a better sealing effect of the cup 18, a multilayer sealing structure design is required; accordingly, as shown in fig. 1, the cup 18 is a double-layer cup along the axial direction, so that the sealing performance of the working area of the sampling tube 12 can be further ensured.

Still further, since the sampling tube 12 is made of glass, the cup is sealed and reciprocated relative to it, which does not make the outer periphery of the cup too large, and thus, a gap is formed between the double cups; in order to improve the sealing effect of the double-layer leather cup; accordingly, as shown in fig. 1, the plunger further comprises:

and the sealing liquid 23 is arranged in a gap between the double-layer leather cups along the circumferential direction and is used for being in contact fit with the inner circumferential wall of the sampling tube 12. The sealing liquid 23 is a liquid having a high surface tension. More specifically, the sealing liquid 23 is formed by mixing distilled water and an organic fat having a relatively large surface tension and capable of lubricating.

In the scheme, in order to realize convenient sampling of the sampler, the main body (carrier) of the sampler is required to be convenient to hold and carry; correspondingly, the carrier in the scheme is a handheld carrier, and the driving mechanism is arranged in the handheld carrier.

Specifically, as shown in fig. 1, the hand-held carrier includes a front end cap 16, a handle housing 1, and a connection frame 14;

the connecting frame 14 is connected to the front end cover 16 at a first end (e.g., the right end of the connecting frame 14 in fig. 1) and connected to the handle housing 1 at a second end (e.g., the left end of the connecting frame 14 in fig. 1); the first end of the sampling tube 12 is connected to the front end cover 16, the second end is connected to the handle housing 1, and the sampling tube is supported by the connecting frame 14, namely the connecting frame 14 is used for supporting the sampling tube 12; by the design, the handheld structure of the sampler can be more stably connected; that is, as shown in fig. 1, the sampler of the present solution is a pistol-type structure, which is convenient for sampling and carrying; the driving mechanism is arranged in the handle shell 1, and a control switch of the driving mechanism is positioned outside the handle shell 1. Therefore, the sampling process is convenient to control. The connection form between the connection frame 14 and the two ends of the sampling tube 12 can refer to the connection structure of the corresponding components in fig. 1, and the details are not repeated here.

Further, as shown in fig. 1, the front end cap 16 is provided with an inlet/outlet 25 communicated with the first end of the sampling tube 12;

the electric valve type sampler provided by the embodiment of the utility model also comprises:

and an electromagnetic valve 17 provided in the front end cover 16 for controlling opening and closing of the inlet/outlet 25. In the normal state, the solenoid valve 17 controls the inlet and outlet 25 to be closed. Therefore, the sample gas in the working area is conveniently isolated from the external environment, the sample gas in the working area is prevented from leaking, and the sample gas is prevented from being polluted and overflowing. Specifically, as shown in fig. 1, the inlet and outlet of the solenoid valve 17 is inserted into the inlet and outlet 25 of the front end cover 16. In addition, the outer end face of the front end cover 16 is also provided with a sampling interface 24 which is communicated with the inlet and outlet 25 and can be suitable for air inlet pipes with different sizes.

In order to further optimize the above technical solution, the driving mechanism comprises an electric lead screw assembly. That is to say, this scheme adopts the motion of the form drive plunger of electronic lead screw, can make the plunger motion more steady, more reliable, still help realizing the purpose of the accurate sample of sampler moreover. Of course, the driving mechanism in the scheme can also adopt other forms of driving mechanisms, such as a push rod mechanism and the like; the driving mechanism is not limited to electric driving, and may be driven pneumatically or hydraulically.

Specifically, the electric lead screw assembly includes: the device comprises a lead screw assembly, a motor transmission assembly, a switch assembly and a battery assembly;

as shown in fig. 1, the lead screw assembly includes a lead screw 9 and a nut 26; the nut 26 is arranged in the handle shell 1; the first end of the screw rod 9 passes through the second end of the sampling cylinder 12 and is positioned in the sampling cylinder 12 to be connected with the plunger; as shown in fig. 1, a second end (e.g., the left end of the guide post 19 in fig. 1) of the guide post 19 is provided with a groove; the multi-head nut 21 is arranged in the groove and is in threaded connection with the first end of the lead screw 9, and the multi-head nut 21 is fixed in the groove through the lock nut 20, so that the first end of the lead screw 9 is connected with the plunger (guide post 19); that is, the locking nut 20 is a multi-head nut 21 connected to the guide post 19 for locking the front end of the screw rod 9, and the multi-head nut 21 is for locking the screw rod 9; the second end of the lead screw 9 is positioned outside the handle shell 1, and the middle part is matched with the nut 26;

the motor transmission assembly is arranged in the handle shell 1 and used for driving the nut 26 to rotate; as shown in fig. 1, the motor transmission assembly includes components such as a dc motor 6, a main gear 7, a driven gear set 8, etc., and the matching manner between the components is shown in fig. 1 and fig. 2; wherein, the direct current motor 6 drives the gear to engage, then the driven gear set 8 drives the nut 26 to rotate, and then the nut 26 is matched with the lead screw 9, so as to realize the reciprocating motion (such as the left-right motion in fig. 1) that the lead screw 9 pushes the plunger; of course, the lead screw 9 in the scheme only makes linear reciprocating motion without autorotation motion; the scheme is provided with a rotation stopping structure matched with the screw rod 9, so that the nut 26 is prevented from driving the screw rod 9 to rotate, and the linear movement of the screw rod 9 is ensured; specifically, as shown in fig. 2, the rotation stopping structure is a screw positioning sleeve 29 disposed on the transmission main body 28 and used for cooperating with the screw 9 to stop rotation. The structure of the screw 9 can be seen in fig. 3, and the structure of the screw positioning sleeve 29 can be seen in fig. 4, and the screw 9 can be prevented from rotating by matching the inner polygonal profile and the outer polygonal profile.

The switch assembly is arranged outside the handle shell 1 and is electrically connected with the motor transmission assembly; as shown in fig. 1, the switch assembly includes a switch 3 and a reversing switch 4 both disposed outside the handle case 1; the battery component is arranged on the handle shell 1 and is respectively electrically connected with the motor transmission component and the switch component. Of course, the battery pack may employ the lithium battery 2 disposed at the bottom of the handle case.

The present solution is further described below with reference to specific embodiments:

problems with the need to inject reaction sample gas into the reaction vessel are often encountered in meteorological and other discipline laboratory studies. When the sample gas volume is small and the precision requirement is not high, the existing medical or other existing injectors for application are usually used, such as 100ml medical glass injectors and the like. However, such finished products are often fixed in volume and not easy to seal, precision control difficulty is large due to manual operation, potential safety hazards may exist due to easy damage caused by improper operation, and the problem that sample gas quantification is not accurate due to the wall of the electrostatic adsorber in the case of a metal injector may also exist.

In order to solve the problems, the utility model designs a non-metal experimental sample gas sampler which is electrically controlled, has good sealing performance and a certain volume (can meet the common experimental requirements).

The utility model relates to a valve-operated sampler, which is a device for introducing laboratory gas samples and standard gas for detection and verification.

The technical scheme of the utility model is as follows:

the main body of the mechanism has the function that the outer cylinder (namely, a sampling cylinder, the same below) is made of quartz glass, and the inner cylinder is made of a plunger leather cup (namely, a plunger, the same below) made of polyester or rubber to make the outer cylinder and the inner cylinder reciprocate, so that the inhalation and the exhalation are realized.

The outer cylinder is made of quartz glass and is marked with scale marks and corresponding Arabic numerals according to the marks.

The plunger cup is a reciprocating part of the sampler and ensures the sealing of the working area and the prevention of the pollution and the overflow of the sample.

The plunger cup sealing realization principle is as follows: the plunger leather cup consists of a guide column and a double-layer leather cup. The guide post mainly plays a stable leather cup in the motion process in the cylinder, so that the leather cup moves smoothly and is connected with a power part (such as a screw rod assembly). The double-layer leather cup is formed by filling liquid with high surface tension in the middle of double layers. The outer cylinder is made of glass product and sealed with the inner leather cup, so that the leather cup cannot be too hard and too high in elasticity, and the glass product and the inner leather cup can be compensated by using liquid with high surface tension.

Power of the electric valve type sampler: the power supply is a rechargeable lithium battery to drive the speed reducing motor and drive the screw rod to push the plunger leather cup to reciprocate.

The normally closed solenoid valve is arranged at the inlet and the outlet and has the function of isolating the normally closed solenoid valve from the outside, so that the sample in the working area is not polluted and leaked, the set pressure is kept, and the leakage is not generated due to the change of the external pressure.

The electric valve type sampler is a laboratory sample collection and air pressure retainer of an air source, which is convenient to carry and simple to operate.

The application of a solenoid valve type sampler; it is a laboratory gas or liquid sample collecting and storing device, and can also be used as a gas source for gas pressure detection (meteorology and other specialties).

The key points and points to be protected of the utility model are as follows:

the outer cylinder of the design adopts quartz glass to avoid electrostatic adsorption; the plunger leather cup consists of a guide column and a double-layer leather cup; the outer barrel and the inner cup move relatively and keep sealed; the guide post ensures that the leather cup moves smoothly and is connected with the power part. The double-layer leather cup has better sealing effect; the inlet and outlet are provided with electromagnetic valves to isolate the sample gas from the outside.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A motorized valve sampler, comprising:

a carrier;

a sampling tube (12) disposed on the support;

a plunger disposed in the sampling cylinder (12) and movable in an axial direction of the sampling cylinder (12);

and the driving mechanism is arranged on the carrier and is used for driving the plunger to move along the axial direction of the sampling cylinder (12).

2. The motorized valve sampler of claim 1 wherein the sampling cylinder (12) is a quartz glass sampling cylinder.

3. The motorized valve sampler of claim 1 wherein the plunger comprises a cup (18) and a guide post (19);

the periphery wall of guide post (19) with the interior perisporium laminating of sampler barrel (12), the first end of guide post (19) with leather cup (18) are connected, the second end with actuating mechanism's expansion end is connected, the periphery of leather cup (18) with the interior perisporium contact cooperation of sampler barrel (12).

4. A motorised valve sampler according to claim 3 wherein the cup (18) is a double cup in its axial direction.

5. The solenoid valve sampler of claim 4, wherein the plunger further comprises:

set up along circumference in the clearance between the double-deck leather cup, and be used for with the interior perisporium contact complex sealing liquid (23) of sampling tube (12).

6. The motorized valve sampler of claim 1, wherein the carrier is a handheld carrier and the drive mechanism is disposed within the handheld carrier.

7. The motorized valve sampler of claim 6 wherein the handheld carrier comprises a front end cap (16), a handle housing (1) and a connection frame (14);

the first end of the connecting frame (14) is connected to the front end cover (16), and the second end of the connecting frame is connected to the handle shell (1); the first end of the sampling tube (12) is connected to the front end cover (16), the second end of the sampling tube is connected to the handle shell (1) and is supported by the connecting frame (14); the driving mechanism is arranged in the handle shell (1), and a control switch of the driving mechanism is positioned outside the handle shell (1).

8. The valve-assisted sampler of claim 7 wherein the front end cap (16) is provided with an inlet and outlet (25) communicating with the first end of the sampling barrel (12);

the motorized valve sampler further comprising:

and the electromagnetic valve (17) is arranged in the front end cover (16) and is used for controlling the opening and closing of the inlet and the outlet (25).

9. The motorized valve sampler of claim 7, wherein the drive mechanism comprises a motorized lead screw assembly.

10. The motorized valve sampler of claim 9, wherein the motorized lead screw assembly comprises: the device comprises a lead screw assembly, a motor transmission assembly, a switch assembly and a battery assembly;

the lead screw component comprises a lead screw (9) and a nut (26); the nut (26) is arranged in the handle shell (1); the first end of the screw rod (9) penetrates through the second end of the sampling barrel (12) and is positioned in the sampling barrel (12) to be connected with the plunger, the second end of the screw rod is positioned outside the handle shell (1), and the middle part of the screw rod is matched with the nut (26); the motor transmission assembly is arranged in the handle shell (1) and is used for driving the nut (26) to rotate; the switch assembly is arranged outside the handle shell (1) and is electrically connected with the motor transmission assembly; the battery component is arranged on the handle shell (1) and is respectively electrically connected with the motor transmission component and the switch component.