CN214635257U

CN214635257U - Gas drying device with radon daughter filtering function

Info

Publication number: CN214635257U
Application number: CN202023309176.5U
Authority: CN
Inventors: 王玮; 梁树红; 张兆山; 段金松; 麻金龙; 李婷; 武旭东; 胡小华
Original assignee: Beijing Research Institute of Uranium Geology
Current assignee: Beijing Research Institute of Uranium Geology
Priority date: 2020-12-31
Filing date: 2020-12-31
Publication date: 2021-11-09
Anticipated expiration: 2030-12-31

Abstract

The utility model belongs to radioactivity detection equipment field, concretely relates to gas drying device with radon daughter filtering capability, include: the air inlet cavity is detachably connected with the dust filtering bin, the air inlet cavity is detachably connected with the drying pipe, and the drying pipe is detachably connected with the radon daughter filtering device. The utility model discloses collect radon daughter filtration and gas drying function in an organic whole, the light and handy portable of overall structure design, the interface is unified, and the gas circuit is connected simply, is applicable to general environment radon measuring apparatu.

Description

Gas drying device with radon daughter filtering function

Technical Field

The utility model belongs to radioactivity detection equipment field, concretely relates to gas drying device with radon daughter filtering capability.

Background

Radon gas pollution in the environment becomes a main radioactive pollution source, the adsorption capacity of the radon is strong, almost all solids, especially loose porous substances can be absorbed, the indoor radiation level is increased, and further the health of people is harmed. In recent years, measurement of the radioactive content of radon in ambient air has received much attention.

There are many methods for measuring radon in ambient air, and a pumping electrostatic collection spectroscopy is commonly used. The method adopts active pumping to suck radon-containing gas into a high-pressure chamber, and the radon gas is generated by decay²¹⁸The Po positively charged particles are adsorbed to the surface of the detector at high speed under the action of the electric field and are detected.

The method can accurately measure the content of radon in the environment, but needs to filter the influence of radon daughter in the environment in advance. In addition, polarized water molecules readily interact with positively charged water molecules when measured using this method²¹⁸Po acts to make it neutral, reducing the collection efficiency of the system. The influence of humidity on this detection method is therefore not negligible.

Therefore, it is highly desirable to develop a device for radon measurement pretreatment in the environment, which can filter out radon daughter in the environment and reduce the humidity in the environment.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a gas drying device with radon daughter filtering capability, the device collect the radon daughter and filter and gas drying function in an organic whole, and overall structure designs lightly portably, and the interface is unified, and the gas circuit is connected simply, is applicable to general environment radon measuring apparatu.

Realize the utility model discloses the technical scheme of purpose: a gas drying device having radon daughter filtering capability, said device comprising: the air inlet cavity is detachably connected with the dust filtering bin, the air inlet cavity is detachably connected with the drying pipe, and the drying pipe is detachably connected with the radon daughter filtering device.

Further, the intake chamber includes: the air inlet cavity comprises an air inlet cavity body, a first groove, an air inlet and a water outlet, wherein the first groove is formed in the upper end of the side wall of the air inlet cavity body; the air inlet is arranged on the outer side wall of the air inlet cavity body and is communicated with the side wall of the air inlet cavity body; the water outlet is arranged on the outer side wall of the air inlet cavity body and is communicated with the side wall of the air inlet cavity body;

the dust filtration bin comprises: the dust filtering device comprises a dust filtering bin main body, a dust removing filter element and a top cover, wherein the dust removing filter element is arranged in an inner cavity of the dust filtering bin main body; a first central hole penetrating through the dust filtering bin main body is formed in the center of the bottom of the dust filtering bin main body; a second central hole penetrating through the top cover is formed in the center of the top cover;

the drying duct includes: the drying tube comprises a drying tube main body, a spring pressing sheet and a drying agent, wherein the spring and the spring pressing sheet are sequentially arranged in a cavity of the drying tube main body, the spring is close to one end of the drying tube main body, the spring pressing sheet is close to the end part of the spring far away from one end of the drying tube main body, the spring and the spring pressing sheet are respectively movably connected with the inner wall of the cavity, and the drying agent is filled in the cavity;

the radon daughter filtering device comprises: filter membrane frame, end cover and radon daughter filtration membrane, first boss and second boss have been seted up by supreme down in proper order to the end cover bottom, the diameter of first boss and the external diameter phase-match of drying tube, the diameter of second boss and the external diameter phase-match of filter membrane frame, filter membrane frame can be dismantled and connect in the second boss of end cover, the downward low groove of opening has been seted up to the up end of second boss, the ascending upper groove of opening has been seted up to the up end of filter membrane frame, upper groove and low groove vacuole formation, radon daughter filtration membrane sets up in the cavity that upper groove and low groove formed.

Further, the air inlet chamber is detachably connected with the dust filtering bin through threads, the air inlet chamber is detachably connected with the drying pipe through threads, and the drying pipe is detachably connected with the radon daughter filtering device through threads.

Further, the air inlet chamber further comprises a sealing ring A, the sealing ring A is arranged at the bottom of the first groove, and the sealing ring A is tightly propped against the bottom of the first groove and one end of the drying tube respectively.

Furthermore, the bottom of the dust filtering bin main body is provided with a first flange along the circumferential direction, and the first flange is tightly propped against the end part of the side wall of the air inlet chamber.

Furthermore, vent holes penetrating through the top cover are uniformly formed in the top cover along the circumferential direction of the second center hole.

Furthermore, a second flange is arranged at the bottom of the top cover along the circumferential direction of the second central hole, and the second flange is tightly propped against the dust removal filter element.

Further, the dust removal filter core is a gear-shaped structure.

Further, the drying agent is a water color-changing material.

Further, the drying tube still includes the warning line, and the warning line sets up on the outer wall of drying tube main part, and the warning line is close to the other end of drying tube main part.

Further, the radon daughter filtering device further comprises a sealing ring B, a second groove is formed in the upper end face of the first boss in the circumferential direction of the end portion, the sealing ring B is arranged in the second groove, and the sealing ring B is tightly propped against the bottom of the second groove and the other end of the drying pipe respectively.

Furthermore, a notch is formed in the lower end face of the filter membrane frame.

Furthermore, the filter membrane frame is provided with an air outlet hole penetrating through the filter membrane frame.

The utility model has the advantages of:

1. the air inlet chamber in the gas drying device with the radon daughter filtering function can effectively prevent water from entering a gas loop in the sampling process;

2. the utility model relates to a gas drying device with radon filtering function, which is provided with a dust filtering bin in the air inlet direction, and can effectively purify the sampling gas through a polymer filter element;

3. the gas drying device with the radon filtering function of the utility model has the advantages that the combination of the spring and the spring pressing sheet is arranged in the inner cavity of the drying tube, so that the drying agent is compacted and fixed in the inner cavity, the gap is reduced, the gas is fully contacted with the drying agent, and the good drying effect is achieved;

4. the utility model discloses a gas drying device with radon daughter filtering capability is with gas drying and radon daughter filtration integration in an organic whole, and gas through the device can directly be used for the environment radon to measure, simplifies the gas circuit and connects.

Drawings

FIG. 1 is a schematic cross-sectional view of a gas drying device with radon filtering function according to the present invention;

FIG. 2 is a schematic cross-sectional view of an air inlet chamber of the radon daughter filtering apparatus of the present invention;

FIG. 3 is a side view of the air inlet chamber of the radon daughter filtering apparatus of the present invention;

FIG. 4 is a schematic sectional view of a dust filtering chamber of the radon filtering device of the present invention;

FIG. 5 is a schematic structural view of a top cover of a dust filtering bin of the gas drying device with radon filtering function provided by the present invention;

FIG. 6 is a schematic cross-sectional view of a drying tube in the radon daughter filtering gas drying device of the present invention;

fig. 7 is a schematic sectional view of a radon daughter filtering device in a gas drying device with radon daughter filtering function according to the present invention.

In the figure: 1-an air inlet chamber; 2-a dust filtering bin; 3-a drying tube; 4-radon daughter filtering means; 101-an intake chamber body; 102-a first groove; 103-air inlet; 104-a water outlet; 105-seal ring a; 201-dust filtration cabin main body; 202-a dust removal filter element; 203-a top cover; 301-drying tube body; 302-a spring; 303-spring pressing sheet; 304-warning lines; 401-a filter membrane holder; 402-an end cap; 403-radon daughter filtration membrane; 404-a second groove; 405-seal B.

Detailed Description

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

As shown in FIG. 1, the utility model provides a gas drying device with radon daughter filtering capability, include: air inlet chamber 1, strain dirt storehouse 2, drying tube 3 and radon daughter filter equipment 4, air inlet chamber 1 can be dismantled with straining dirt storehouse 2 through the screw thread and be connected, and air inlet chamber 1 can be dismantled through the screw thread with drying tube 3 and be connected, and drying tube 3 can be dismantled through the screw thread with radon daughter filter equipment 4 and be connected.

As shown in fig. 2-3, the air inlet chamber 1 is made of a cylinder with a height of 40mm, an inner diameter of 41mm and an outer diameter of 65mm, the main material is PC plastic, and the single-side wall thickness is 12 mm. The intake chamber 1 includes: an inlet chamber body 101, a first recess 102, an inlet 103, a drain 104 and a seal a 105.

As shown in fig. 2, the first groove 102 is disposed at the upper end of the sidewall of the intake chamber body 101, and the width of the first groove 102 matches the wall thickness of the drying tube 3.

As shown in fig. 1, an inner thread is provided on an outer wall of the first groove 102, an outer thread is provided on an outer circumference of one end of the drying pipe 3, and the drying pipe 3 is connected to the air inlet chamber 1 by a thread. Sealing washer A105 sets up in the bottom of first recess 102, and when drying tube 3 screwed up through threaded connection with air inlet chamber 1, sealing washer A105 tightly pushes up with the bottom of first recess 102 and the one end of drying tube 3 respectively, makes to have good leakproofness between drying tube 3 and the air inlet chamber 1.

As shown in fig. 2, the air inlet 103 is provided on the outer wall of the air inlet chamber body 101, and the air inlet 103 is connected to the side wall of the air inlet chamber body 101 as a connection port of a rubber hose.

As shown in fig. 3, the drain port 104 is provided on the outer side wall of the intake chamber body 101, the peripheral bottom of the drain port 104 is flush with the bottom of the intake chamber body 101, and the drain port 104 is connected to the side wall of the intake chamber body 101. The drain 104 may also act as a pressure relief valve. The bottom of the air inlet chamber 1 is kept flat, so that the device can be vertically placed on a working plane. The air inlet chamber 1 prevents water in the sampling environment from being drawn into the interior of the drying tube by the air pump.

As shown in fig. 1 and 4, the dust filtering bin 2 is located behind the air inlet chamber 1, and can effectively filter a small amount of water mist and dust in the sampled air and prevent the dust from entering the measuring chamber of the instrument. The dust filtration bin 2 includes: a dust filtering bin main body 201, a dust removing filter element 202 and a top cover 203.

As shown in fig. 1 and 4, an inner cavity is formed inside the dust filtering bin main body 201, the inner cavity opens upward, and the inner cavity is coaxial with the dust filtering bin main body 201. The periphery of straining dirt storehouse main part 201 is equipped with the external screw thread, and air inlet chamber main part 101 cavity inner wall is equipped with the internal thread, strains dirt storehouse 2 and air inlet chamber 1 and passes through threaded connection. The bottom of straining dirt storehouse main part 201 is equipped with first flange along the circumferencial direction, strains dirt storehouse 2 and when intake chamber 1 screwed up through threaded connection, first flange and intake chamber 1's lateral wall tip top are tight, avoid straining the excessive connection of dirt storehouse 2 and intake chamber 1. The bottom center position of straining dirt storehouse main part 201 is equipped with first centre bore, and first centre bore runs through the bottom of straining dirt storehouse main part 201.

As shown in fig. 4-5, the dust-removing filter element 202 is disposed in the inner cavity of the dust-filtering chamber main body 201, and the dust-removing filter element is a white polymer filter element, and is formed into a gear-shaped structure by sintering. The top cover 203 is arranged above the dust filtering bin main body 201, and the top cover 203 is detachably connected with the dust filtering bin main body 201. The central point of top cap 203 puts and is equipped with the second centre bore, evenly is provided with many rings of air vents along second centre bore circumferencial direction, and second centre bore and air vent all run through top cap 203, make gaseous even through the filter core from each direction, filter particulate matter or micronic dust etc. in straining the dirt storehouse. And a second flange is arranged at the bottom of the top cover 203 along the circumferential direction of the second central hole, and the second flange is tightly pressed against the dust removal filter element 202 and is used for tightly pressing and fixing the dust removal filter element 202 in the inner cavity of the dust filtration bin main body 201, so that the dust removal filter element 202 is tightly pressed against the bottom of the inner cavity of the dust filtration bin main body 201 and the bottom of the top cover 203 respectively.

As shown in FIG. 6, the drying tube 3 has an inner diameter of 50mm and a height of 200 mm. The drying duct 3 includes: drying tube main part 301, spring 302 and spring preforming 303, warning line 304 and drier, the inside cavity that link up that is equipped with of drying tube main part 301, spring 302, spring preforming 303 set gradually in the cavity, spring 302 is close to the one end of drying tube main part 301, the tip that drying tube main part 301 one end was kept away from to spring preforming 303 next-door neighbour spring 302, spring preforming 303 respectively with cavity inner wall swing joint, the drier is filled in the cavity.

Through the combination of the spring 302 and the spring pressing sheet 303 which are movably connected along the inner wall of the cavity are added at one end of the drying tube main body 301, namely the air inlet direction, the drying agent filled in the cavity is compacted, the drying agent is prevented from shaking in the cavity, the gas is reduced from passing through the gap at the edge of the cavity and is fully contacted with the drying agent, and the device achieves a good drying effect.

The drying agent is a material capable of changing color when meeting water, such as an orange gel particle drying agent, the orange gel particle drying agent changes from orange to dark green after absorbing water, and the water absorption condition of the drying agent can be judged through the change of the color of the drying agent.

As shown in fig. 6, a warning line 304 is provided on the outer wall near the other end of the drying tube body 301, and when the length of the desiccant discolored in the cavity is longer than the warning line (when the device is horizontally placed) or higher than the warning line (when the device is vertically placed), it is suggested that the desiccant is nearly saturated when absorbing water, and the drying effect is not good, and a new desiccant needs to be replaced.

As shown in fig. 7, the radon daughter filtering means 4 comprises: a filter membrane frame 401, an end cap 402, a radon daughter filter membrane 403 and a sealing ring B405. The bottom of the end cover 402 is sequentially provided with a first boss and a second boss from bottom to top, the diameter of the first boss is matched with the outer diameter of the drying tube 3, the diameter of the second boss is matched with the outer diameter of the filter membrane frame 401, and the filter membrane frame 401 is detachably connected in the second boss of the end cover 402 through threaded connection. The lower recess that the opening is decurrent has been seted up to the up end of second boss, and the upper groove that the opening is decurrent has been seted up to the up end of filter membrane frame 401, and upper groove and lower recess form the cavity, and the height of cavity is a little higher than the thickness of radon daughter filtration membrane 403, and radon daughter filtration membrane 403 sets up in the cavity that upper groove and lower recess formed, leaves certain space about radon daughter filtration membrane 403 and supplies gas to pass through. The radon filtering membrane 403 is preferably made of a material having a large porosity, such as silk floss, and has a diameter of 40mm, a thickness of 0.5mm and a pore diameter of 40 μm. After the radon-containing gas passes through the filter membrane, radon daughter is filtered out.

As shown in fig. 7, the upper end surface of the first boss is provided with a second groove 404 in the end portion circumferential direction, and the width of the second groove 404 matches the wall thickness of the drying duct 3. The inner periphery of the first boss is provided with an internal thread, the outer periphery of the other end of the drying tube 3 is provided with an external thread, and the drying tube 3 is connected with the radon daughter filtering device 4 through the thread. Sealing washer B405 sets up in second recess 404, and when drying tube 3 and radon daughter filter equipment 4 screwed up through threaded connection, sealing washer B405 pushes up tightly with the bottom of second recess 404 and the other end of drying tube 3 respectively. The sealing ring B405 is arranged in the second groove 404, so that the sealing performance of the whole device can be improved.

As shown in fig. 7, the lower end surface of the filter membrane holder 401 is provided with a notch, which is convenient for a user to use a common tool to remove the filter membrane holder 401 from the end cap 402 and to replace the filter membrane periodically. Two rows of air outlet holes which are vertically arranged and are cross-shaped are also arranged on the membrane filtering frame 401, and the air outlet holes penetrate through the membrane filtering frame 401, so that the gas can uniformly pass through the radon daughter filtering membrane 403 as far as possible.

The utility model discloses a theory of operation and use as follows:

the dust filtering bin 2 is connected with the air inlet chamber 1 in a threaded fit mode, after the inner cavity of the drying tube 3 is filled with the orange glue drying agent, the drying tube is compacted in the cavity of the drying tube 3 by matching of the spring 302 and the spring pressing sheet 303, and the drying tube 3 and the air inlet chamber 1 are screwed down in a threaded connection mode. The radon daughter filter membrane 403 is placed in the lower groove of the end cover 402, the filter membrane frame 401 is screwed into the end cover 402 by using coins and the like, and then the radon daughter filter device 4 is screwed with the drying tube 3 in a matching manner, so that the radon daughter filter and gas drying can be carried out by using the device. The gas passes through the gas inlet chamber 1, the dust filtering bin 2, the drying pipe 3 and the radon daughter filtering device 4 to obtain dry and clean sampling gas which can be directly used for measurement.

The present invention has been described in detail with reference to the drawings and examples, but the present invention is not limited to the above examples, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art. The present invention can adopt the prior art for the content which is not described in detail in the present invention.

Claims

1. A gas drying device having radon daughter filtering capability, said device comprising: air inlet chamber (1), dust filtration storehouse (2), drying tube (3) and radon daughter filter equipment (4), air inlet chamber (1) can be dismantled with dust filtration storehouse (2) and be connected, and air inlet chamber (1) can be dismantled with drying tube (3) and be connected, and drying tube (3) can be dismantled with radon daughter filter equipment (4) and be connected.

2. A gas drying device with radon daughter filtering function according to claim 1, wherein said inlet chamber (1) comprises: the air inlet cavity comprises an air inlet cavity body (101), a first groove (102), an air inlet (103) and a water outlet (104), wherein the first groove (102) is formed in the upper end of the side wall of the air inlet cavity body (101); the air inlet (103) is arranged on the outer side wall of the air inlet chamber main body (101) and is communicated with the side wall of the air inlet chamber main body (101); the water outlet (104) is arranged on the outer side wall of the air inlet chamber main body (101) and is communicated with the side wall of the air inlet chamber main body (101);

the dust filtering bin (2) comprises: the dust filtering device comprises a dust filtering bin main body (201), a dust removing filter element (202) and a top cover (203), wherein the dust removing filter element (202) is arranged in an inner cavity of the dust filtering bin main body (201), the top cover (203) is arranged above the dust filtering bin main body (201), the top cover (203) is detachably connected with the dust filtering bin main body (201), and the dust removing filter element (202) is tightly propped against the bottom of the inner cavity of the dust filtering bin main body (201) and the bottom of the top cover (203) respectively; a first central hole penetrating through the dust filtering bin main body (201) is formed in the center of the bottom of the dust filtering bin main body (201); a second central hole penetrating through the top cover (203) is formed in the center of the top cover (203);

the drying duct (3) comprises: the drying tube comprises a drying tube main body (301), a spring (302), a spring pressing sheet (303) and a drying agent, wherein the spring (302) and the spring pressing sheet (303) are sequentially arranged in a cavity of the drying tube main body (301), the spring (302) is close to one end of the drying tube main body (301), the spring pressing sheet (303) is close to the end part of the spring (302) far away from one end of the drying tube main body (301), the spring (302) and the spring pressing sheet (303) are respectively movably connected with the inner wall of the cavity, and the drying agent is filled in the cavity;

the radon daughter filtering device (4) comprises: filter membrane frame (401), end cover (402) and radon daughter filtration membrane (403), end cover (402) bottom has been seted up first boss and second boss by supreme down in proper order, the diameter of first boss and the external diameter phase-match of drying tube (3), the diameter of second boss and the external diameter phase-match of filter membrane frame (401), filter membrane frame (401) can be dismantled and connect in the second boss of end cover (402), the lower recess that the opening is decurrent has been seted up to the up end of second boss, the ascending upper groove of opening has been seted up to the up end of filter membrane frame (401), upper groove and lower recess vacuole formation, radon daughter filtration membrane (403) set up in the cavity that upper groove and lower recess formed.

3. The gas drying device with radon daughter filtering function as claimed in claim 2, wherein said gas inlet chamber (1) is detachably connected with the dust filtering bin (2) by screw thread, the gas inlet chamber (1) is detachably connected with the drying tube (3) by screw thread, and the drying tube (3) is detachably connected with the radon daughter filtering device (4) by screw thread.

4. The gas drying device with radon daughter filtering function as claimed in claim 2, wherein said gas inlet chamber (1) further comprises a sealing ring A (105), said sealing ring A (105) is disposed at the bottom of said first groove (102), and said sealing ring A (105) is respectively abutted against the bottom of said first groove (102) and one end of said drying tube (3).

5. The gas drying device with radon daughter filtering function as claimed in claim 2, wherein the bottom of said dust filtering bin body (201) is provided with a first flange along the circumferential direction, and the first flange is tightly pressed against the end of the side wall of the air inlet chamber (1).

6. The radon daughter filtering gas drying device as claimed in claim 2, wherein said top cover (203) is provided with vent holes uniformly extending through said top cover (203) along the circumferential direction of said second central hole.

7. The radon daughter filtering gas drying device as claimed in claim 2, wherein a second flange is provided at the bottom of said top cover (203) along the circumference of said second central hole, said second flange abutting against said dust-removing filter element (202).

8. The gas drying device with radon daughter filtering function as claimed in claim 2, wherein said dust removing filter element (202) is of a gear-like structure.

9. The gas drying device with radon daughter filtering function as claimed in claim 2, wherein said drying agent is a water-color-changing material.

10. The gas drying device with radon filtering function as claimed in claim 2, wherein said drying tube (3) further comprises a warning line (304), said warning line (304) is disposed on the outer wall of the drying tube main body (301), and said warning line (304) is close to the other end of the drying tube main body (301).

11. The gas drying device with radon daughter filtering function as claimed in claim 2, wherein said radon daughter filtering device (4) further comprises a sealing ring B (405), the upper end face of the first boss is provided with a second groove (404) along the end circumferential direction, the sealing ring B (405) is arranged in the second groove (404), and the sealing ring B (405) is respectively abutted against the bottom of the second groove (404) and the other end of the drying tube (3).

12. The gas drying device with radon daughter filtering function as claimed in claim 2, wherein the lower end face of the filter membrane frame (401) is provided with a notch.

13. The gas drying device with radon daughter filtering function as claimed in claim 2, wherein said filter membrane holder (401) is provided with air outlet holes penetrating through the filter membrane holder (401).