CN213209650U

CN213209650U - Aerosol and iodine sampling instrument sampling mechanism

Info

Publication number: CN213209650U
Application number: CN202022170906.1U
Authority: CN
Inventors: 顾国荣; 穆龙; 潘艳东; 何兴旭
Original assignee: Chengdu West Nuclear Instrument Co ltd
Current assignee: Chengdu West Nuclear Instrument Co ltd
Priority date: 2020-09-28
Filing date: 2020-09-28
Publication date: 2021-05-14
Anticipated expiration: 2030-09-28

Abstract

The utility model discloses an aerosol and iodine sampling instrument sampling mechanism, which comprises a sampling head and a protection mechanism, wherein the protection mechanism comprises a cover body and a cover cap, the cover body is a hollow structure with two unsealed ends, the bottom of the cover body is in contact connection with the aerosol and iodine sampling instrument, the cover cap is connected with the top of the cover body and is used for sealing the top of the cover body, and the sampling head is arranged in a space enclosed by the cover body and the cover cap; the cover body side wall still is equipped with fixed unit, fixed unit includes the support frame, the vaulting pole, the apparatus further comprises a rotating shaft, support frame and cover body coupling, be equipped with the slide on the support frame, the vaulting pole removes along the slide, the pivot is connected with the shroud, be provided with cambered surface A on the support frame, be provided with cambered surface B on the vaulting pole, cambered surface A, cambered surface B is connected with pivot lateral wall contact simultaneously, the pivot is spacing in cambered surface A, in the space that cambered surface B encloses, fixed unit uses cover body axial lead to set up as center equidistant array, the protection machanism of this device can play the guard action to the sampling.

Description

Aerosol and iodine sampling instrument sampling mechanism

Technical Field

The utility model relates to a nuclear radiation protection technical field is an aerosol and iodine sampling instrument sampling mechanism particularly.

Background

With the development of the national nuclear power industry, more and more nuclear power plants are built successively, and in order to better protect the environment and the public, the influence of the nuclear power plants on the environment and surrounding residents is judged, so that environmental radioactivity monitoring is very necessary. In atmospheric environments and nuclear facility sites, particularly in nuclear accident situations, it is often necessary to sample the atmosphere in the natural environment or site environment for a certain period of time to analyze the activity of radioactive aerosols and gaseous iodine in the environment.

Aerosol and iodine sampling appearance need take a long time to sample usually when taking a sample, and in the actual conditions, in order to prevent that the instrument from overheated, just need wait for a period of time after the sampling end time, through interval sampling, play the guard action to the instrument, however when not sampling, the sample head is in open state, and pollutants such as raise dust in the air can fall on the filter paper of sample head this moment, influences the sampling effect.

SUMMERY OF THE UTILITY MODEL

In view of the above-mentioned shortcomings of the prior art, the present invention is directed to: the sampling mechanism of the aerosol and iodine sampling instrument is provided, and the sampling head of the aerosol and iodine sampling instrument is protected during the period of stopping sampling, so that the sampling head is prevented from being polluted.

In order to realize the purpose of the utility model, the utility model provides a following technical scheme:

the sampling mechanism comprises a sampling head and a protection mechanism, wherein the protection mechanism comprises a cover body and a cover cap, the cover body is a hollow structure with two unsealed ends, the bottom of the cover body is in contact connection with the aerosol and the iodine sampling instrument, the cover cap is connected with the top of the cover body and used for sealing the top of the cover body, and the sampling head is arranged in a space surrounded by the cover body and the cover cap;

the side wall of the cover body is further provided with a fixing unit, the fixing unit comprises a support frame, a support rod and a rotating shaft, the support frame is connected with the cover body, a sliding seat sleeved outside the side wall of the support rod is arranged on the support frame, the support rod moves along the sliding seat, the rotating shaft is connected with the cover cap, an arc surface A is arranged on the support frame, an arc surface B is arranged on the support rod, the arc surface A and the arc surface B are simultaneously in contact connection with the side wall of the rotating shaft, the rotating shaft is limited in a space defined by the arc surface A and the arc surface B, and the fixing unit is arranged in an equidistant array by taking the axial lead of the cover body as the center;

the sampling head comprises an upper cover body, a lower cover body, an iodine box and filter paper, wherein the upper cover body is connected with the lower cover body through threads, the iodine box and the filter paper are arranged in a space enclosed by the upper cover body and the lower cover body, the iodine box is arranged below the filter paper, the filter paper is used for collecting aerosol in the air, and the iodine box is used for collecting gaseous iodine in the air.

Furthermore, a sealing element is arranged in a space enclosed by the upper cover body and the lower cover body and used for sealing the junction of the upper cover body and the lower cover body.

Further, the sealing member includes sealing washer A, sealing washer B, sealing washer A with go up the lid butt, sealing washer B with lid butt down, the filter paper clamp is located between sealing washer A, the sealing washer B.

Further, still include the pressure pad, pressure pad one side with sealing washer B butt, the opposite side with iodine box butt.

Further, the lower cover body further comprises an air outlet channel and a pressure difference transmitter, the air outlet channel is of a Venturi tube structure, the Venturi tube structure comprises an inlet section, a throat part and an outlet section, one end of the pressure difference transmitter is communicated with the inlet section, and the other end of the pressure difference transmitter is communicated with the throat part.

Further, the air outlet channel and the lower cover body are integrally formed.

Furthermore, the sealing ring A, the sealing ring B and the pressure pad are all made of phenyl silicone rubber.

Furthermore, the bottom of the cover body is also provided with a plurality of wing plates, the wing plates are hinged with the cover body, and a plurality of vacuum suction cups are arranged on the contact surfaces of the wing plates and the aerosol and iodine sampling instrument.

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

1. the protection mechanism plays a role in protecting the sampling head through a space defined by the cover body and the cover cap, and prevents the filter paper of the sampling head from being polluted when the sampling is not carried out.

2. The cover of the protection mechanism can be detached or flexibly adjusted to be hinged with the cover body according to needs, so that the adaptability of the device is improved.

3. The air flow through the iodine box can be accurately measured by the channel of the Venturi structure arranged on the sampling head, the Venturi structure has the advantages of simple structure, convenience in maintenance and stable performance, the calculation is accurate, the energy consumption is low, and the endurance of the aerosol and the iodine sampling instrument can be increased.

Drawings

FIG. 1 is a structural diagram of a sampling mechanism of the aerosol and iodine sampling instrument of the present invention;

FIG. 2 is a view of the protection mechanism;

FIG. 3 is an enlarged view of FIG. 2 at A;

FIG. 4 is a perspective view of the protection mechanism;

fig. 5 is an internal structure view of the sampling head.

List of reference numerals

1-upper cover body, 2-lower cover body, 3-iodine box, 4-pressure pad, 5-sealing ring A, 6-filter paper, 7-circular boss, 8-inlet section, 9-throat section, 10-outlet section, 11-aerosol and iodine sampling instrument, 12-protection mechanism, 13-sampling head, 14-supporting frame, 15-sliding seat, 16-supporting rod, 17-rotating shaft, 18-cambered surface B, 19-cambered surface A, 20-cover cap, 21-cover body, 22-wing plate, 23-vacuum chuck, 24-sealing ring B and 25-differential pressure transmitter.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, integrally connected, or detachably connected; may be communication within two elements; they may be directly connected or indirectly connected through an intermediate, and those skilled in the art can understand the specific meaning of the above terms in the present invention in specific situations.

As shown in fig. 1 to 5, the sampling mechanism of the aerosol and iodine sampling instrument comprises a sampling head 13 and a protection mechanism 12, wherein the protection mechanism 12 comprises a cover body 21 and a cover cap 20, the cover body 21 is a hollow structure with two unsealed ends, the bottom of the cover body is in contact connection with the aerosol and iodine sampling instrument 11, the cover cap 20 is connected with the top of the cover body 21 and used for sealing the top of the cover body 21, and the sampling head 13 is arranged in a space surrounded by the cover body 21 and the cover cap 20;

the side wall of the cover body 21 is further provided with a fixing unit, the fixing unit comprises a support frame 14, a stay bar 16 and a rotating shaft 17, the support frame 14 is connected with the cover body 21, a sliding seat 15 sleeved outside the side wall of the stay bar 16 is arranged on the support frame 14, the stay bar 16 moves along the sliding seat 15, the rotating shaft 17 is connected with the cover cap 20, an arc surface A19 is arranged on the support frame 14, an arc surface B18 is arranged on the stay bar 16, the arc surface A19 and the arc surface B18 are simultaneously in contact connection with the side wall of the rotating shaft 17, the rotating shaft 17 is limited in a space surrounded by the arc surface A19 and the arc surface B18, and the fixing unit is arranged in an equidistant array by taking the axial lead of the cover body 21 as the center;

the sampling head 13 comprises an upper cover body 1, a lower cover body 2, an iodine box 3 and filter paper 6, wherein the upper cover body 1 is connected with the lower cover body 2 through threads, the iodine box 3 and the filter paper 6 are arranged in a space defined by the upper cover body 1 and the lower cover body 2, the iodine box 3 is arranged below the filter paper 6, the filter paper 6 is used for collecting aerosol in the air, and the iodine box 3 is used for collecting gaseous iodine in the air.

The utility model discloses a theory of operation does: in the initial state, the cambered surfaces B18 on the stay rods 16 in all the fixed units and the cambered surfaces a19 on the support frame 14 are simultaneously in contact with the rotating shaft 17, at this time, the cover 20 is in a non-movable state, when the cover 21 and the cover 20 are integrally placed on the aerosol and iodine sampling instrument 11, and the sampling head 13 is arranged inside the cover 21, at this time, the entrance of the sampling head 13 is protected from being polluted, when the cover 20 needs to be opened, there are two ways, one way is to leave only one stay rod 16 out of all the stay rods 16 and keep the rest stay rods 16 immovable, and the rest stay rods 16 are pulled to be not in contact with the rotating shaft 17 corresponding to the stay rods under the action of the sliding seat 15, at this time, the cover 20 can rotate around the rotating shaft 17 at the stay rods 16 which keep immovable, and the hinged position of the cover 20 and the cover 21 can be flexibly adjusted according to needs, alternatively, all of the struts 16 may be pulled apart, and the cover 20 may be removed from the housing 21.

The utility model discloses in, through reasonable setting the length of cambered surface A19, cambered surface B18 makes to work as cambered surface A19, cambered surface B18 with during the contact of pivot 17, pivot 17 is blocked and is located among cambered surface A19, cambered surface B18, at this moment pivot 17 can only be relative cambered surface A19, cambered surface B18 are rotatory, work as vaulting pole 16 is followed slide 15 is kept away from behind the pivot 17, vaulting pole 16 is to the limiting displacement of pivot 17 disappears, at this moment pivot 17 can follow take off on the cambered surface A19.

The working principle of the sampling head 13 is as follows: when sampling is needed, the sampling head 13 sucks air in the external environment through the air inlet channel of the upper cover body 1 of the sampling head 13 under the action of the aerosol and iodine sampling instrument 11, and discharges the air from the air outlet channel of the lower cover body 2, and the filter paper 6 and the iodine box 3 sample the activity of the radioactive aerosol and gaseous iodine in the external air when the air passes through the filter paper 6 and the iodine box 3.

This use is novel in, can the lid 2 inside still sets up ring boss 7 down, the top surface level setting of ring boss 7 is through setting up ring boss 7 makes and works as iodine box 3 place in when lid 2 is down, iodine box 3 is in the horizontality.

Further, a sealing element is further arranged in a space enclosed by the upper cover body 1 and the lower cover body 2, and is used for sealing a junction of the upper cover body 1 and the lower cover body 2.

Further, the sealing element comprises a sealing ring A5 and a sealing ring B24, the sealing ring A5 is abutted with the upper cover body 1, the sealing ring B24 is abutted with the lower cover body 2, and the filter paper 6 is clamped between the sealing ring A5 and the sealing ring B24.

When upper cover body 1, lower lid 2 are screwed up, upper cover body 1, lower lid 2 are right sealing washer A5, sealing washer B24 produce the squeezing action, make and to hug closely the inner wall of upper cover body 1, lower lid 2, it is right the juncture of upper cover body 1, lower lid 2 seals, simultaneously, sealing washer A5, sealing washer B24 are still right when pressing from both sides tight filter paper 6 plays the fixed action, prevent filter paper 6 takes place the displacement, influences the sampling effect.

Further, the iodine box further comprises a pressure pad 4, wherein one side of the pressure pad 4 is abutted with the sealing ring B24, and the other side is abutted with the iodine box 3.

Pressure pad 4 is right iodine box 3 plays the positioning action, the utility model discloses in, through reasonable setting sealing washer A5, sealing washer B24, pressure pad 4's thickness makes sealing washer B24 is hugged closely under the pressure action during lid 2 down, pressure pad 4 is in the effect of sealing washer B24 is compressed tightly iodine box 3 makes it be fixed in the space that upper cover body 1, lower lid 2 enclose, prevent that it from taking place to remove, and then lead to the air quantity through iodine box 3 to change.

Further, lower lid 2 still includes air outlet channel, differential pressure changer 25, air outlet channel is the venturi structure, the venturi structure includes inducer 8, throat 9, export section 10, differential pressure changer 25's one end with inducer 8 intercommunication, the other end with throat 9 intercommunication.

According to the working principle of the Venturi tube, when air flows through the air outlet channel, the air is contracted at the throat part 9 of the air outlet channel, so that the air flow rate is increased, the pressure is reduced, the pressure difference is generated between the inlet section 8 and the throat part 9 of the Venturi structure, the pressure difference transmitter 25 converts the pressure difference into an electric signal, and the air flow passing through the air outlet channel in unit time can be obtained accordingly.

Further, the air outlet channel and the lower cover body 2 are integrally formed.

There is not connecting gap between integrated into one piece's lower lid 2 and the air outlet channel for the gas tightness between the two is better, makes and works as iodine box 3 is put into wherein the back, only need go up lid 1 with the juncture of lower lid 2 sets up the sealing washer, when having reduced the use cost of device, has improved the degree of accuracy of sampling.

Furthermore, the sealing ring A5, the sealing ring B24 and the pressure pad 4 are all made of phenyl silicone rubber.

The phenyl silicone rubber has good radiation resistance and high and low temperature resistance, and prevents the flexibility of the sealing ring A5, the sealing ring B24 and the pressure pad 4 from being reduced under the action of radiation, so that the sealing function is ineffective.

Furthermore, the bottom of the cover body 21 is also provided with a plurality of wing plates 22, the wing plates 22 are hinged with the cover body 21, and the contact surface of the wing plates 22 and the aerosol and iodine sampling instrument 11 is provided with a plurality of vacuum suction cups 23.

When the cover body 21 is placed on aerosol and iodine sampling appearance 11, make through will vacuum chuck 23 on the pterygoid lamina 22 make it adsorb on the table wall of aerosol and iodine sampling appearance 11 the cover body 21 can be fixed in on aerosol and iodine sampling appearance 11, prevents the cover body 21 is blown by wind, the utility model discloses in, pterygoid lamina 22 centers on the cover body 21 sets up, increases fixed effect through a plurality of pterygoid lamina 22.

The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, however, the present invention is not limited to the details of the embodiments in the above description, and the technical concept of the present invention can be within the scope of the present invention, and can be modified to various simple modifications, and these simple modifications all belong to the protection scope of the present invention. It should be noted that the various technical features described in the above embodiments can be combined in any suitable manner without contradiction, and in order to avoid unnecessary repetition, the present invention does not need to describe any combination of the features. In addition, various embodiments of the present invention can be combined arbitrarily, and the disclosed content should be regarded as the present invention as long as it does not violate the idea of the present invention.

Claims

1. The utility model provides an aerosol and iodine sampling appearance sampling mechanism, includes sampling head (13), its characterized in that: the device is characterized by further comprising a protection mechanism (12), wherein the protection mechanism (12) comprises a cover body (21) and a cover cap (20), the cover body (21) is of a hollow structure with two unsealed ends, the bottom of the cover body (21) is in contact connection with an aerosol and iodine sampling instrument (11), the cover cap (20) is connected with the top of the cover body (21) and used for sealing the top of the cover body (21), and the sampling head (13) is arranged in a space surrounded by the cover body (21) and the cover cap (20);

the side wall of the cover body (21) is also provided with a fixing unit, the fixing unit comprises a support frame (14), a support rod (16) and a rotating shaft (17), the supporting frame (14) is connected with the cover body (21), a sliding seat (15) sleeved outside the side wall of the stay bar (16) is arranged on the supporting frame (14), the stay bar (16) moves along the sliding seat (15), the rotating shaft (17) is connected with the cover cap (20), the supporting frame (14) is provided with an arc surface A (19), the stay bar (16) is provided with an arc surface B (18), the cambered surface A (19) and the cambered surface B (18) are simultaneously in contact connection with the side wall of the rotating shaft (17), the rotating shaft (17) is limited in a space enclosed by the cambered surface A (19) and the cambered surface B (18), the fixing units are arranged in an equidistant array by taking the axial lead of the cover body (21) as the center;

the sampling head (13) comprises an upper cover body (1), a lower cover body (2), an iodine box (3) and filter paper (6), wherein the upper cover body (1) is connected with the lower cover body (2) through threads, the iodine box (3) and the filter paper (6) are arranged in a space surrounded by the upper cover body (1) and the lower cover body (2), the iodine box (3) is arranged below the filter paper (6), the filter paper (6) is used for collecting aerosol in the air, and the iodine box (3) is used for collecting gaseous iodine in the air.

2. An aerosol and iodine sampler sampling mechanism as defined in claim 1 wherein: and a sealing element is further arranged in a space enclosed by the upper cover body (1) and the lower cover body (2) and used for sealing the junction of the upper cover body (1) and the lower cover body (2).

3. An aerosol and iodine sampler sampling mechanism as defined in claim 2 wherein: the sealing element comprises a sealing ring A (5) and a sealing ring B (24), the sealing ring A (5) is abutted to the upper cover body (1), the sealing ring B (24) is abutted to the lower cover body (2), and the filter paper (6) is clamped between the sealing ring A (5) and the sealing ring B (24).

4. An aerosol and iodine sampler sampling mechanism according to claim 3 and further comprising: the iodine box is characterized by further comprising a pressure pad (4), wherein one side of the pressure pad (4) is abutted to the sealing ring B (24), and the other side of the pressure pad is abutted to the iodine box (3).

5. An aerosol and iodine sampler sampling mechanism according to claim 4 and further comprising: lower lid (2) still include air outlet channel, pressure differential transmitter (25), air outlet channel is venturi structure, venturi structure includes inducer (8), throat (9), export section (10), the one end of pressure differential transmitter (25) with inducer (8) intercommunication, the other end with throat (9) intercommunication.

6. An aerosol and iodine sampler sampling mechanism according to claim 5 and further comprising: the air outlet channel and the lower cover body (2) are integrally formed.

7. An aerosol and iodine sampler sampling mechanism according to claim 6 and further comprising: the sealing ring A (5), the sealing ring B (24) and the pressure pad (4) are all made of phenyl silicone rubber.

8. An aerosol and iodine sampler sampling mechanism according to claim 7 and further comprising: the bottom of the cover body (21) is also provided with a plurality of wing plates (22), the wing plates (22) are hinged with the cover body (21), and the contact surface of the wing plates (22) and the aerosol and iodine sampling instrument (11) is provided with a plurality of vacuum suckers (23).