External noise reduction type air sampler

Abstract

The utility model relates to the field of air samplers, in particular to an external noise reduction type air sampler. The sampler comprises a sampler body and a support, the support comprises a mounting seat and supporting legs connected to the mounting seat, the sampler further comprises a first silencer, an air outlet is formed in the bottom of the sampler body, the first silencer comprises an air inlet pipe, an expansion pipe and an air outlet pipe, the air inlet pipe is connected with the air outlet, and the expansion pipe is connected with the air outlet pipe. And the air outlet pipe is detachably connected with the central hole of the mounting seat. The silencer further comprises a second silencer, the second silencer comprises a center pipe located in the center of the support, and the center hole of the installation base is communicated with the center pipe. According to the utility model, the direction of the air outlet is changed, and the first silencer is matched, so that the sampler and the bracket can be quickly mounted, and the noise is reduced. The second silencer utilizes the central supporting pipe structure of the support, and the overall structure is simple and compact.

Description

TECHNICAL FIELD

[0001] The utility model relates to air sampler field, concretely is a kind of external sound-absorbing air sampler. BACKGROUND

[0002] The aerosol formed by radioactive substances and its fission (decay) products is one of the most important pollution hazards in the environment of nuclear technology research and nuclear facility operation. It is necessary to monitor whether radioactive iodine and radioactive aerosol are contained in the ambient air. The iodine aerosol sampler is usually installed near the flue and is often fixedly installed at the point of the certain range around the nuclear facility where the ambient air needs to be supervised and detected. The aerosol and iodine-containing compounds in the ambient air in the range are sampled.

[0003] When the sampler is started and the internal rotary vane fan is running at the highest speed, the noise measured at the position about 1m in front of the instrument is greater than 83 decibels, and it is sharp and piercing. The utility model discloses a kind of full-automatic atmospheric particulate matter samplers'silencing structure in Chinese utility model patent with the authorization announcement No.CN221006969U, it is fixed with silencing mechanism in the top of four described support frame and fixed and penetrates to the inside of filter box top silencing ring, the silencing mechanism volume is big, occupies additional space, so that equipment carrying and installation are inconvenient.

[0004] Moreover, the installation mode of the air sampler and the support is to make screw holes and protruding positioning pins at the bottom of the sampler, and then to fix the air sampler to the metal supporting plate fixed on the tripod support in position by screws. The metal supporting plate is large in size, occupies storage space, is inconvenient to carry, and needs to be fixed before installation each time. The small bolts fixed between the sampler and the supporting plate are easy to lose, and need additional tools to tighten. Moreover, it is not easy to align the bolt holes at the bottom of the sampler, and it is inconvenient to tighten quickly horizontally upward. Therefore, the operation is inconvenient. UTILITY MODEL CONTENTS

[0005] In view of the deficiencies of the prior art, the utility model provides an external sound-absorbing air sampler which is small in noise, does not occupy additional space, and is installed quickly and conveniently.

[0006] The utility model solves the technical problems by adopting the following technical scheme:

[0007] An external sound-absorbing air sampler, comprising a sampler body and a support, wherein the support comprises a mounting seat and a supporting leg connected to the mounting seat, and further comprises a first silencer; the bottom of the sampler body is provided with an air outlet; the first silencer comprises an air inlet pipe, an expansion pipe and an air outlet pipe; the air inlet pipe is connected to the air outlet; and the air outlet pipe is detachably connected to the center hole of the mounting seat.

[0008] Further, it also includes a second muffler, the second muffler includes a center tube located in the center of the support, the center hole of the mounting seat is communicated with the center tube.

[0009] Further, the center tube includes an outer tube, a perforated inner tube and sound-absorbing cotton located between the outer tube and the perforated inner tube.

[0010] Further, the center tube includes a plurality of cavities arranged in the axial direction and communicated with each other.

[0011] Further, the expansion tube includes two oppositely arranged horn tubes.

[0012] Further, the outer side of the air outlet tube is provided with a locking plane, and the mounting seat is provided with a locking bolt corresponding to the locking plane.

[0013] Further, the center tube is sleeved with a sliding ring I, each support leg is sleeved with a sliding ring II, a connecting rod is hingedly connected between the sliding ring I and the sliding ring II, and the sliding ring II is provided with a locking device; the support leg is hingedly connected to the mounting seat.

[0014] Further, the locking device includes a pressing rod hingedly connected to the sliding ring II, a protrusion is arranged at the front end of the pressing rod, and a groove matched with the protrusion on the pressing rod is arranged on the support leg.

[0015] Further, the air inlet tube is detachably connected with the air outlet through threads.

[0016] The beneficial effects of the present application are as follows:

[0017] The present application changes the direction of the air outlet, cooperates with the first muffler, can realize the quick installation of the sampler and the support and reduce the noise, and the muffler does not occupy additional space. The second muffler utilizes the center support tube structure of the support, does not need to be additionally arranged, and has a simple and compact overall structure. The present application changes the air flow direction and speed through the first muffler and the second muffler, reduces the noise, and the actual measured noise is less than 60 decibels, can eliminate the sharp and harsh high-frequency noise, and reduce the noise pollution of the sampler. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is an overall structure explosion schematic view of the present application;

[0019] Figure 2 It is a first muffler cross-sectional view of the present application;

[0020] Figure 3 It is a first embodiment cross-sectional view of the second muffler of the present application;

[0021] Figure 4 It is the second embodiment cross section schematic view of the second muffler of the utility model;

[0022] In the figure, the sampler body 1, the air outlet 101, the support 2, the mounting seat 201, the supporting leg 202, the recess 2021, the locking bolt 203, the sliding ring II 204, the connecting rod 205, the locking device 206, the first muffler 3, the air inlet pipe 301, the expansion pipe 302, the horn pipe 3021, the air outlet pipe 303, the locking plane 3031, the second muffler 4, the outer pipe 401, the perforated inner pipe 402, the sound-absorbing cotton 403, the horn type spacing plate 404, the sliding ring I 405. Specific embodiments

[0023] In order to better understand the utility model, the following will be combined Figures 1-4 The technical scheme in the embodiments of the utility model is clearly and completely described, obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the protection scope of the utility model.

[0024] Embodiment one:

[0025] The external sound-absorbing air sampler in the embodiment includes the sampler body 1, the support 2 and the first muffler 3, the support 2 includes the mounting seat 201 and the supporting leg 202 connected to the mounting seat 201, preferably, three supporting legs are adopted, the supporting leg 202 is fixedly connected with the mounting seat 201, of course, in order to facilitate storage, the supporting leg 202 can also be hingedly connected with the mounting seat 201.

[0026] For the internal structure of the sampler body 1, it is same as the prior art product, and will not be repeated here, the utility model only changes the air outlet position of the sampler body 1. As shown in the figure, Figure 1 The bottom of the sampler body 1 is provided with the air outlet 101, the air outlet 101 extends upward to the internal chamber of the sampler body 1, the air outlet 101 can protrude from the sampler body 1 or be built-in the threaded hole of the sampler body 1. The first muffler 3 includes the air inlet pipe 301, the expansion pipe 302 and the air outlet pipe 303, the air inlet pipe 301 is detachably connected with the air outlet 101 through a threaded or plug-in mode. The air outlet pipe 303 is detachably connected with the center hole of the mounting seat 201 through a threaded or plug-in mode. Preferably, the outer side of the air outlet pipe 303 is provided with the locking plane 3031, the mounting seat 201 is provided with a threaded hole, the locking bolt 203 passes through the threaded hole and corresponds to the locking plane 3031, after being inserted into the air outlet pipe 303, the locking bolt 203 is screwed to lock the air outlet pipe 303.

[0027] The expansion pipe 302 of the first muffler 3 is circular in shape, and preferably has anti-slip patterns on the surface of the expansion pipe 302 for easy hand holding. The interior of the expansion pipe 302 is preferably configured as shown in Figure 2 The two oppositely arranged horn pipes 3021 change the flow direction and speed of the airflow after passing through the expansion pipe 302, thereby reducing noise. Of course, sound-absorbing materials can also be arranged on the inner wall of the expansion pipe 302. Further, the air inlet pipe 301 and the air outlet pipe 303 of the first muffler 3 are connected to the expansion pipe 302 by threaded connection for easy disassembly.

[0028] In use, the first muffler 3 not only serves as a muffling component, but also as a connecting piece of the sampler body 1 and the support 2, without occupying additional space and with easy installation.

[0029] Embodiment Two:

[0030] The second muffler 4 is a central pipe arranged vertically in the center of the support 2, and the central hole of the mounting seat 201 is in communication with the central pipe. The central pipe is a tubular pipe with open ends, and an interior sound-absorbing module is arranged therein. In this embodiment, the second muffler 4 preferably includes an outer pipe 401, a perforated inner pipe 402, and sound-absorbing cotton 403 arranged between the outer pipe 401 and the perforated inner pipe 402.

[0031] As another preferred embodiment of the second muffler 4, the central pipe includes a plurality of cavities arranged axially and in communication with each other, as shown in Figure 4 The cavities are diffusion chambers composed of a plurality of horn-shaped partition plates 404, and sound waves enter the diffusion chambers, reflect and interfere with each other in the diffusion chambers, thereby attenuating the noise propagating in the pipe. Of course, in this embodiment, the inner wall of the central pipe can also be provided with a layer of sound-absorbing material to further absorb noise energy.

[0032] Embodiment Three:

[0033] In order to facilitate the storage of the support 2, on the basis of the first or second embodiment, the central tube is sleeved with a sliding ring I 405, each of the support legs 202 is sleeved with a sliding ring II 204, the sliding ring I 405 and the sliding ring II 204 are hingedly connected with a connecting rod 205, the sliding ring II 204 is provided with a locking device 206, the locking device 206 comprises a pressing rod hingedly connected to the sliding ring II 204, the front end of the pressing rod is provided with a protrusion, the support leg 202 is provided with a groove 2021 matched with the protrusion on the pressing rod. Of course, the locking device 206 can also adopt a locking bolt, similarly, the support leg 202 is provided with a groove corresponding to the locking bolt. The support leg 202 is hingedly connected to the mounting seat 201. When the support 2 needs to be stored, the sliding ring I 405 moves upward, and the three support legs 202 fold inward. When the support leg 202 is unfolded, the locking of the sliding ring II 204 is realized through the locking device 206. In this embodiment, the central tube serves as the central stable structure of the support 2 and also as the sound attenuation component, without occupying additional space and being convenient to store.

[0034] It should be noted that in the second embodiment, the second muffler 4 can not use the central tube, but at least one support leg, the two ends of the support leg are open, and the internal structure is the same as that of the second embodiment. The mounting seat 201 is provided with a communication passage with the support leg. This design also belongs to the protection scope of the present application.

[0035] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An external silencer-type air sampler, comprising a sampler body and a bracket, the bracket comprising a mounting base and support legs connected to the mounting base, characterized in that: It also includes a first silencer, with an air outlet at the bottom of the sampler body. The first silencer includes an air inlet pipe, an expansion pipe, and an air outlet pipe. The air inlet pipe is connected to the air outlet pipe, and the air outlet pipe is detachably connected to the center hole of the mounting base.

2. An external silencer-type air sampler as described in claim 1, characterized in that: It also includes a second muffler, which includes a central tube located at the center of the bracket, and the central hole of the mounting base communicates with the central tube.

3. An external silencer-type air sampler as described in claim 2, characterized in that: The central tube includes an outer tube, a perforated inner tube, and sound-absorbing cotton located between the outer tube and the perforated inner tube.

4. An external silencer-type air sampler as described in claim 2, characterized in that: The central tube includes several cavities arranged axially upwards, and the cavities are interconnected.

5. An external silencer-type air sampler as described in claim 1, characterized in that: The expansion tube includes two opposing horn tubes.

6. An external silencer-type air sampler as described in claim 1, characterized in that: A locking plane is provided on the outer side of the air outlet pipe, and a locking bolt corresponding to the locking plane is provided on the mounting base.

7. An external silencer-type air sampler as described in claim 2, 3, or 4, characterized in that: A sliding ring I is fitted onto the central tube, and a sliding ring II is fitted onto each of the support legs. A connecting rod is hinged between the sliding ring I and the sliding ring II, and a locking device is provided on the sliding ring II. The support leg is hinged to the mounting base.

8. An external silencer-type air sampler as described in claim 7, characterized in that: The locking device includes a pressure rod hinged to the sliding ring II, with a protrusion at the front end of the pressure rod and a groove on the support leg that mates with the protrusion on the pressure rod.

9. An external silencer-type air sampler as described in claim 1, characterized in that: The air inlet pipe and the air outlet are detachably connected by threads.

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