CN106932244B

CN106932244B - Buffer of large-flow impactor for air sampling

Info

Publication number: CN106932244B
Application number: CN201710266097.4A
Authority: CN
Inventors: 吴为; 王翀; 高雷; 吴晓梅; 姜晨
Original assignee: Suzhou Shangke Clean Technology Co ltd
Current assignee: Suzhou Shangke Clean Technology Co ltd
Priority date: 2017-04-21
Filing date: 2017-04-21
Publication date: 2023-04-18
Anticipated expiration: 2037-04-21
Also published as: CN106932244A

Abstract

The invention aims to provide a buffer of a large-flow impactor for air sampling, which achieves the effect of improving the stability of the impactor in the sampling process, and comprises a shell, a half-end cover, an internal tray, a ball and a spring, wherein the upper part of the shell is provided with a buffer cavity, the diameter of the lower part of the shell is smaller than that of the upper part of the shell, and external threads are tapped on the lower part of the shell. Install the buffer behind the large-traffic impinger that is used for the air sampling, the stability of impacter in the multiplicable sampling process avoids the inside sampling ware that does not have locking device of impinger to take place to rock in the sampling process, guarantees the sampling effect.

Description

Buffer of large-flow impactor for air sampling

Technical Field

The invention belongs to the technical field of air sampling, and particularly relates to a buffer of an impact type sampler.

Background

In the field of air sampling, an impact type sampling is commonly used, an air exhaust device is connected with an air outlet of an impactor, air enters the impactor from an air inlet of the impactor, and a sampling vessel arranged behind each stage of impact disc collects sampling targets in a grading manner. Because the sampling vessel needs to avoid air pollution in the installation process, the installation structure of the sampling vessel is very simple, and a locking mechanism is not arranged, so that the stability of the impactor can influence the sampling effect in the sampling process.

In the prior art, the striker is generally fixed by a tripod. The connection mode between the tripod and the buffer is generally a single-point connection or a plane connection, and the influence of the vibration or the airflow of the air suction device on the stability of the impactor sampling vessel in the sampling process is difficult to completely counteract.

Disclosure of Invention

The technical problem to be solved by the invention is to provide a buffer of a high-flow impactor for air sampling, so as to achieve the effect of improving the stability of the impactor in the sampling process.

In order to solve the technical problems, the invention is realized by the following technical scheme: the utility model provides a buffer for large-traffic impinger of air sampling, is including casing, half end cover, inside tray, ball and spring, the casing is the rotating member, and the upper portion of casing is provided with the cushion chamber, and the diameter of casing lower part is less than upper portion and attacks the external screw thread, half end cover, inside tray, ball and spring all set up in the cushion chamber of casing, inside tray sets up the lower part in the cavity, the spring sets up between inside tray and cushion chamber bottom surface and is connected with both respectively, half end cover sets up the upper portion in the cavity, is interference fit between half end cover and the cavity, the ball sets up between inside tray and half end cover, the upper end of half end cover is equipped with the opening, the ball exposes in the opening from half end cover upper end partially.

Furthermore, a local spherical cavity matched with the ball is arranged in the half end cover, and a concave surface matched with the ball is arranged in the central area of the upper surface of the inner tray.

Furthermore, the cavity wall of the half end cover extends downwards to the bottom of the buffer cavity, and the outer diameter of the inner tray is not larger than the inner diameter of the half end cover.

Furthermore, the spring is fixed on the bottom surface of the buffer cavity through glue.

The impactor has the advantages that after the buffer is arranged on the large-flow impactor for air sampling, the stability of the impactor in the sampling process can be improved, a sampling vessel without a locking device in the impactor is prevented from shaking in the sampling process, and the sampling effect is guaranteed.

Drawings

The invention is further described below with reference to the accompanying drawings.

FIG. 1 is a perspective view of the present invention;

FIG. 2 is a cross-sectional view of the present invention;

fig. 3 is an exploded view of the present invention.

In the figure: 1. a housing; 2. a half end cap; 3. an inner tray; 4. a ball; 5. a spring; 6. A buffer chamber.

Detailed Description

The invention is described in detail below with reference to the following figures and embodiments:

as shown in fig. 3, the device comprises a shell 1, a half-end cover 2, an internal tray 3, a round ball 4 and a spring 5, wherein the shell 1 is a rotating part, and a buffer cavity 6 is arranged at the upper part of the shell 1.

As shown in fig. 2, the diameter of the lower part of the shell 1 is smaller than that of the upper part and is tapped with external threads, and the half-end cap 2, the inner tray 3, the ball 4 and the spring 5 are all arranged in a buffer cavity 6 at the upper part of the shell 1. The spring 5 is adhered to the bottom surface of the buffer chamber 6 by glue, and the inner tray 3 is installed at the lower portion of the buffer chamber 6 and is in contact with the spring 5. As can be seen from fig. 3, the central portion of the upper surface of the inner tray 3 is provided with a concave surface for engaging with the spherical ball 4. Half end cover 2 fixed mounting is in the upper portion of cushion chamber 6 and for interference fit between 6 with the cushion chamber, and the chamber wall downwardly extending of half end cover 2 is to the bottom of cushion chamber 6, and half end cover 2's internal diameter is not less than the external diameter of inside tray 3. As can be seen in connection with fig. 3, the half cap 2 is provided with a partly spherical cavity. The spherical ball 4 is disposed between the end cap half 2 and the inner tray 3 and can move freely in the space therebetween. The half-cap 2 is provided, in its upper part, with an opening through which the sphere 4 is partially exposed.

The installation of the device is completed as shown in fig. 1.

During installation, the buffer is installed on an end cover of the impactor through a threaded matching nut at the lower part of the shell 1, and the ball 4 of the buffer is in contact with the impactor fixing device.

In the sampling process, when the impactor shakes due to an air exhaust device, air flow disturbance or other reasons, the round ball 4 of the buffer further contacts with the impactor fixing device, the round ball 4 moves towards the inside of the buffer cavity 6 to press the inner tray 3, and the inner tray 3 moves towards the bottom of the buffer cavity 6 under the pressure of the round ball 4 to press the spring 5. The spring 5 stores the impact force into elastic potential energy, so that the shaking amplitude of the impactor is reduced, and the stability of the impactor in the sampling process is improved.

The bumper ball 4 is also free to rotate in the space between the end half 2 and the inner tray 3 and can rotate more gently in the striker fixture when acted upon by an external force, increasing the stability of the striker.

It is to be emphasized that: the above are only preferred embodiments of the present invention, and the present invention is not limited thereto in any way, and any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention are within the scope of the technical solution of the present invention.

Claims

1. A buffer of a large flow impactor for air sampling is characterized in that: the improved structure of the novel anti-theft bolt comprises a shell, a half-end cover, an internal tray, a ball and a spring, wherein the shell is a rotating part, a buffer cavity is formed in the upper part of the shell, the diameter of the lower part of the shell is smaller than that of the upper part of the shell, and an external thread is tapped on the lower part of the shell; the spring is fixed on the bottom surface of the buffer cavity through glue.

2. A buffer for a high flow impactor for air sampling according to claim 1 characterised in that: the cavity wall of the half end cover extends downwards to the bottom of the buffer cavity, and the outer diameter of the inner tray is not larger than the inner diameter of the half end cover.