CN216847377U - PMT assembly for beta-ray particulate matter detection device - Google Patents
PMT assembly for beta-ray particulate matter detection device Download PDFInfo
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- CN216847377U CN216847377U CN202220099317.5U CN202220099317U CN216847377U CN 216847377 U CN216847377 U CN 216847377U CN 202220099317 U CN202220099317 U CN 202220099317U CN 216847377 U CN216847377 U CN 216847377U
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Abstract
The utility model discloses a PMT assembly for beta ray particulate matter detection device, its characterized in that includes the box of top trompil, is located the box and passes the PMT of box top trompil, is located the PMT fixing device in the box, still including setting up the PMT constant temperature unit in the box to and set up at the box top and with the ring cap that box top trompil and PMT all match.
Description
Technical Field
The utility model belongs to the technical field of the environment detects and smoke and dust direct-reading technique and specifically relates to a PMT assembly for beta ray particulate matter detection device is related to.
Background
The PMT is a photomultiplier in a beta-ray particle detection device, and the beta-ray particle detection device adopts a beta-ray method to realize the detection of the concentration of atmospheric particulate matters. Through long-term outdoor test, PMT in the beta-ray particulate matter detection device can fluctuate to the count value along with the change of temperature, and then causes the inaccurate problem of detection precision because of count value fluctuation.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a PMT assembly is used to beta ray particulate matter detection device is provided, its technical scheme who adopts is: the utility model provides a beta ray is PMT assembly for particulate matter detection device, it includes the box of top trompil, is located the box and passes the PMT of box top trompil, is located the PMT fixing device in the box, still includes the PMT constant temperature unit who sets up in the box to and set up at the box top and all match the ring cap with box top trompil and PMT.
The utility model discloses further technical characteristic is:
the PMT fixing device comprises a PMT mounting base positioned on the bottom of the box body and a PMT fixing base positioned on the periphery of the PMT in the box body and fixedly connected to the PMT mounting base.
The PMT constant temperature unit comprises a heating paste arranged on the periphery of the PMT fixing seat and a circuit board electrically connected with the heating paste.
The constant temperature unit further comprises a heat insulation layer arranged on the periphery of the heating paste.
The circuit board is fixedly connected to the box body or the PMT fixing seat through a circuit board mounting plate.
The PMT constant temperature unit comprises a semiconductor refrigeration piece arranged on the periphery of the PMT fixing seat and a circuit board electrically connected with the semiconductor refrigeration piece.
The circuit board is fixedly connected to the box body or the PMT fixing seat through a circuit board mounting plate.
The utility model has the advantages that:
the utility model relates to a beta ray is PMT assembly for particulate matter detection device, it includes the box of top trompil, is located the box and passes the PMT of box top trompil, is located the PMT fixing device in the box, still including setting up the PMT constant temperature unit in the box to and set up at the box top and with the ring cap that box top trompil and PMT all match. Because of the existence of the constant temperature unit, the working state of the PMT is more stable, the measurement precision of the beta-ray particulate matter detection device is improved, and meanwhile, the PMT is installed in the beta-ray particulate matter detection device in a final assembly mode, so that the convenience and the rapidness are improved, and the tooling efficiency is improved.
Drawings
Fig. 1 is a top view of an embodiment of the present invention;
FIG. 2 is a schematic sectional view of the structure in the direction of A-A.
Detailed Description
The technical solution of the present invention is further explained by the accompanying drawings and examples.
As shown in fig. 1 and fig. 2, a PMT assembly for a beta-ray particulate matter detection device includes a housing 1 with an opening at the top, a PMT2 located in the housing and passing through the opening at the top of the housing, a PMT fixing device 3 located in the housing, a PMT thermostatic unit 4 located in the housing, and a ring cap 5 located at the top of the housing and matching with both the opening at the top of the housing and the PMT.
In this embodiment, the PMT fixing device 3 includes a PMT mounting base 301 located at the bottom of the casing and a PMT fixing base 302 located at the periphery of the PMT inside the casing and fixedly connected to the PMT mounting base 301; the PMT constant temperature unit 4 comprises a heating paste 401 arranged on the periphery of the PMT fixing seat and a circuit board 402 electrically connected with the heating paste 401; the constant temperature unit 4 further comprises an insulating layer 403 arranged on the periphery of the heating paste 401; in addition, in this embodiment, the circuit board 402 is fixedly connected to the PMT fixing base 302 by the circuit board mounting plate 6.
In practical applications, the circuit board 402 may also be fixedly connected to the case 1 through the circuit board mounting plate 6.
In addition, in practical application, the constant temperature unit 4 may further include a semiconductor cooling plate disposed around the PMT fixing base, and a circuit board electrically connected to the semiconductor cooling plate, wherein the circuit board is fixedly connected to the case or the PMT fixing base through a circuit board mounting plate. The semiconductor refrigeration piece is also called a Peltier, one side of the semiconductor refrigeration piece is refrigerated, the other side of the semiconductor refrigeration piece radiates heat, the current direction is changed, the functions of the two sides are exchanged, and the semiconductor refrigeration piece achieves constant temperature through a control circuit board.
The utility model relates to a beta ray is PMT assembly for particulate matter detection device, it includes the box 1 of top trompil, is located the box and passes the PMT2 of box top trompil, is located PMT fixing device 3 in the box, still including setting up PMT constant temperature unit 4 in the box to and set up at the box top and with the ring cap 5 that box top trompil and PMT all match. Because of the existence of the constant temperature unit 4, the working state of the PMT is more stable, the measurement precision of the beta-ray particle detection device is improved, and meanwhile, the PMT is installed in the beta-ray particle detection device in a final assembly mode, so that the convenience and the rapidness are improved, and the tooling efficiency is improved.
In practical application, PMT fixing base 302 is the heat conduction material, and the power through circuit board 402 control heating subsides 401 makes its temperature maintain invariable to make PMT be in a stable temperature environment, can effectively reduce PMT like this because the error that temperature fluctuation brought, make PMT operating condition more stable, and then improved whole beta ray particulate matter detection device's measurement accuracy.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the preferred embodiments, those skilled in the art should understand that: the technical solution of the present invention can still be modified or replaced by other equivalent means, and the modified technical solution can not be separated from the spirit and scope of the technical solution of the present invention.
Claims (7)
1. The utility model provides a beta ray particulate matter detection device is with PMT assembly, its characterized in that includes the box of top trompil, is located the box and passes the PMT of box top trompil, is located the PMT fixing device in the box, still including setting up the PMT constant temperature unit in the box to and set up at the box top and with the box top trompil all the ring cap that matches with PMT.
2. The beta-ray particulate detection device PMT assembly according to claim 1, wherein: the PMT fixing device comprises a PMT mounting base positioned on the bottom of the box body and a PMT fixing base positioned on the periphery of the PMT in the box body and fixedly connected to the PMT mounting base.
3. The beta-ray particle detection device PMT assembly according to claim 2, wherein the PMT thermostatic unit includes a heating paste disposed around the PMT fixing base, and a circuit board electrically connected to the heating paste.
4. The beta-ray particle detection device PMT assembly according to claim 3, wherein: the constant temperature unit further comprises a heat insulation layer arranged on the periphery of the heating paste.
5. The beta-ray particle detection device PMT assembly according to claim 3 or 4, wherein: the circuit board is fixedly connected to the box body or the PMT fixing seat through a circuit board mounting plate.
6. The beta-ray particulate detection device PMT assembly according to claim 2, wherein: the PMT constant temperature unit comprises a semiconductor refrigeration piece arranged on the periphery of the PMT fixing seat and a circuit board electrically connected with the semiconductor refrigeration piece.
7. The beta-ray particle detection device PMT assembly according to claim 6, wherein: the circuit board is fixedly connected to the box body or the PMT fixing seat through a circuit board mounting plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220099317.5U CN216847377U (en) | 2022-01-15 | 2022-01-15 | PMT assembly for beta-ray particulate matter detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220099317.5U CN216847377U (en) | 2022-01-15 | 2022-01-15 | PMT assembly for beta-ray particulate matter detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216847377U true CN216847377U (en) | 2022-06-28 |
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ID=82084049
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220099317.5U Active CN216847377U (en) | 2022-01-15 | 2022-01-15 | PMT assembly for beta-ray particulate matter detection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216847377U (en) |
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2022
- 2022-01-15 CN CN202220099317.5U patent/CN216847377U/en active Active
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