CN213813282U

CN213813282U - Leakage test machine

Info

Publication number: CN213813282U
Application number: CN202022658730.4U
Authority: CN
Inventors: 巫日涵; 巫班金
Original assignee: Shenzhen Refond Equipment Co ltd
Current assignee: Shenzhen Refond Equipment Co ltd
Priority date: 2020-11-17
Filing date: 2020-11-17
Publication date: 2021-07-27
Anticipated expiration: 2030-11-17

Abstract

The utility model relates to a check out test set technical field discloses a leakage test machine, include: the console comprises a control system and a control panel for controlling the operation of the mechanical part; the aerosol generating device is arranged on the outer wall of the console, and an electric proportional valve is arranged on a pipeline connected with an external air source; the test cabin is provided with a certain accommodating space, the outer wall of the test cabin is provided with an air inducing device, and the air inducing device is connected with the aerosol generating device through a pipeline and used for conveying aerosol gas into the test cabin; a sampling probe on the sampling test device is arranged in the test chamber, and the sampling test device is arranged on the outer wall of the test chamber and is used for measuring particles in the aerosol. The utility model provides a stable, the fast nature test machine of revealing of sampling response of aerosol concentration control.

Description

Leakage test machine

Technical Field

The utility model relates to a check out test set technical field indicates a revealing test machine especially.

Background

The leakage tester judges the protection effect capabilities of the mask, the mouth mask, the protective clothing and the like by detecting the particle concentration in the test cabin and detecting the particle concentration of the mask, the mouth mask, the protective clothing and the like. The existing leakage tester on the market has the following technical problems: the concentration of the particulate matters needs to be controlled in the leakage test, and the flow control of the existing aerosol generating device is controlled by adopting a manual valve, so that the control is unstable; meanwhile, the existing leakage tester integrates the sampling test device with a control console, so that the sampling distance is long, the sampling result cannot be quickly responded, and the long sampling distance influences the detection result.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem, the utility model provides a leakage test machine, its main objective is through setting up the concentration control problem that electric proportional valve controlled the aerosol, simultaneously, to sampling test device and controlling means separation setting, sets up sampling test device's position on the test cabin outer wall, improves sampling response speed.

In order to achieve the above object, the utility model adopts the following technical scheme:

a leak tester, comprising:

the control console comprises a control system and a control panel, wherein the control system is used for controlling the operation of the mechanical part;

the aerosol generating device is arranged on the outer wall of the console, and an electric proportional valve is arranged on a pipeline which is connected with an external air source;

the test cabin is provided with a certain accommodating space, the outer wall of the test cabin is provided with an air inducing device, and the air inducing device is connected with the aerosol generating device through a pipeline and used for conveying aerosol gas into the test cabin;

the sampling test device, the last sampling probe of sampling test device arranges in the test cabin, sampling test device installs on the test cabin outer wall, the granule in the measurement aerosol.

Further, the leakage tester also comprises an exhaust device and an exhaust filter, wherein the exhaust device and the exhaust filter are arranged on the side wall of the test chamber.

Furthermore, the aerosol generating device comprises an oily aerosol generator and a salt aerosol generator, and the oily aerosol generator and the salt aerosol generator are connected with the electric proportional valve through a three-way electromagnetic valve.

Further, the air inducing device is a blower.

Further, sampling test device includes sampling probe, particle counter and sampling pump, sampling probe arranges in the test cabin is inside, particle counter with the sampling pump sets up the test cabin is outside, sampling probe particle counter and the sampling pump connects gradually.

Further, the leakage testing machine further comprises a running machine, and the running machine is arranged in the testing cabin.

The utility model adopts two electric proportional valves to control the concentration of the aerosol, and the electric proportional valves can realize continuous flow control, thereby realizing stable control of the concentration of the aerosol and ensuring the accurate concentration of the aerosol during detection; and simultaneously, the utility model discloses in with sampling test device and control cabinet separation setting, with sampling test device setting on the outer wall of test cabin, reduce the sampling distance, can the quick response testing result, it is long to reduce the sampling distance, causes the influence to the sampling testing result.

Drawings

Fig. 1 is a schematic structural diagram of a national standard leakage tester.

Fig. 2 is a schematic structural diagram of the present invention.

Fig. 3 is a schematic diagram of the structural arrangement of the present invention.

Fig. 4 is an enlarged schematic view of the structural arrangement of the console in fig. 3.

Fig. 5 is an enlarged schematic view of the structural arrangement of the test chamber of fig. 3.

Fig. 6 is an enlarged schematic view of the structure of the sampling detection device in fig. 3.

The reference numbers illustrate: 1. a console; 2. an aerosol generating device; 3. an electric proportional valve; 4. a test chamber; 5. an air inducing device; 6. a sampling test device; 7. sampling a probe; 8. an exhaust device; 9. an exhaust gas filter; 10. a particle counter; 11. a sampling pump.

Detailed Description

Referring to fig. 1-3, a leakage testing machine for implementing the present invention includes: the control system comprises a console 1, wherein the console 1 comprises a control system and a control panel for controlling the operation of mechanical parts; the aerosol generating device 2 is arranged on the outer wall of the console 1, and an electric proportional valve 3 is arranged on a pipeline connecting the aerosol generating device 2 with an external air source; the test cabin 4 is provided with a certain accommodating space, an air inducing device 5 is arranged on the outer wall of the test cabin 4, and the air inducing device 5 is connected with the aerosol generating device 2 through a pipeline and used for conveying aerosol gas into the test cabin 4; the sampling test device 6, the sampling probe 7 on the sampling test device 6 is arranged in the test cabin 4, the sampling test device 6 is installed on the outer wall of the test cabin 4, and particles in the aerosol are measured.

The concentration of the aerosol is controlled by adopting a manually-adjusted valve to control the flow of an air source based on the existing leakage testing machine on the market, the manual adjustment mode is unstable and complex, and the concentration of the aerosol is not easy to realize stable control, so that the detection result is influenced; meanwhile, the sampling test device 6 and the console 1 are integrated in the existing leakage test machine on the market, so that the sampling distance of the sampling test device 6 is long, the sampling is correspondingly slow, the sampling distance is long, and aerosol is easy to change in the sampling process, so that the detection result is influenced.

To this, the utility model discloses in provide a novel structure nature test machine of revealing, because electric proportional valve 3 has the characteristic of continuity control flow, the event controls the gas concentration of the produced aerosol of aerosol generating device 2 through setting up electric proportional valve 3, can the gas concentration of stable control aerosol, simultaneously, electric proportional valve 3's control mode accessible control system controls, compares with the mode that has adopted manual regulation now, and it is more simple and convenient to operate. And simultaneously, the utility model discloses in to sampling test device 6 and 1 separation setting of control cabinet, through setting up sampling test device 6 on the outer wall of test chamber 4, shortened the sampling distance, can the quick response sampling result, reduce the aerosol and carry at longer sampling distance, cause the influence to the testing result.

The specific using process is as follows: an air source generated by an external air source generator (such as an air compressor) is communicated with an aerosol generating device 2, the aerosol concentration with a certain concentration is stably controlled by the flow regulation of an electric proportional valve 3, the aerosol with a certain concentration is guided into a test chamber 4 under the action of an induced draft device 5, a tested sample is worn by a tested person in a clean air area, the wearing airtightness is checked according to a using method, then a sampling pipeline is connected to a sampling detection device 6, the background concentration of a mask, a mask or a protective clothing when the tested person breathes outside the test chamber is measured, 5 data are measured, and the arithmetic mean value is taken as the background concentration. The method comprises the steps of enabling a test subject to enter a test chamber 4, enabling the test subject to complete a series of test actions (such as no talking on the head and reading a text aloud) according to time requirements after aerosol with a certain concentration is introduced, and detecting the concentration of particles in the test chamber 4 and a mask, a mouth mask or protective clothing through a sampling detection device 6 during each action so as to detect leakage detection of the mask, the mouth mask, the protective clothing and the like, wherein pipelines are not shown in the figure.

In a specific implementation, as shown in fig. 2 and 5, the leakage tester further includes an exhaust device 8 and an exhaust filter 9, and the exhaust device 8 and the exhaust filter 9 are disposed on the side wall of the test chamber 4. In the implementation, the exhaust device 8 is an exhaust fan, the exhaust fan exhausts the aerosol in the test chamber 4, and the exhaust filter 9 is arranged to filter the particulate matters in the aerosol.

As shown in fig. 4, the aerosol generating device 2 includes an oily aerosol generator and a salt aerosol generator, and the oily aerosol generator and the salt aerosol generator are connected to the electric proportional valve 3 through a three-way electromagnetic valve.

Owing to need detect to NaCl particulate matter and oil particulate matter in test standard, to this, the utility model provides an aerosol generating device 2 includes oily aerosol generator and salt nature aerosol generator, controls through the three-way solenoid valve that sets up and is to NaCl particulate matter detection or oil particulate matter detection.

The air inducing device 5 is an air blower. The aerosol is directed by the action of a blower.

As shown in fig. 5 and 6, the sampling test device 6 includes a sampling probe 7, a particle counter 10, and a sampling pump 11, the sampling probe 7 is disposed in the test chamber 4, the particle counter 10 and the sampling pump 11 are disposed outside the test chamber 4, and the sampling probe 10, the particle counter 10, and the sampling pump 11 are sequentially connected.

The utility model discloses in still specifically provide the structure setting of sampling test device 6 that uses in the implementation process, the sampling probe 7 that sets up mainly divide into following type for sampling test cabin 4's sampling probe 7, be used for sampling mask or gauze mask's sampling probe 7, be used for sampling protective clothing's sampling probe 7, each sampling probe 7 connects particle counter 10 respectively and adopts pump 11, and its specific use is: under the action of the sampling pump 11, the sampling probe 7 guides the aerosol to the particle counter 10, processes the particles in the aerosol through the particle counter 10, and transmits the detection information to the console 1. The sampling pump 11 then passes the sampled aerosol to the test chamber 4.

The leak tester also includes a treadmill, which is disposed within the test chamber 4. With the treadmill, leakage of the mask, mask and protective clothing is detected when the subject walks or runs on the treadmill.

The above embodiments are only for describing the preferred embodiments of the present invention, and are not intended to limit the scope of the present invention, and various modifications and improvements made by the technical solution of the present invention by those skilled in the art are all within the scope of the present invention as defined by the claims.

Claims

1. A leak tester, comprising:

2. The leak tester as defined in claim 1, wherein: the leakage tester also comprises an exhaust device and an exhaust filter, wherein the exhaust device and the exhaust filter are arranged on the side wall of the test chamber.

3. The leak tester as defined in claim 2, wherein: the aerosol generating device comprises an oily aerosol generator and a salt aerosol generator, and the oily aerosol generator and the salt aerosol generator are connected with the electric proportional valve through a three-way electromagnetic valve.

4. The leak tester as defined in claim 1, wherein: the air inducing device is an air blower.

5. The leak tester as defined in claim 1, wherein: the sampling test device comprises a sampling probe, a particle counter and a sampling pump, wherein the sampling probe is arranged in the test chamber, the particle counter and the sampling pump are arranged outside the test chamber, and the sampling probe, the particle counter and the sampling pump are sequentially connected.

6. The leak tester as defined in claim 1, wherein: the leakage testing machine further comprises a running machine, and the running machine is arranged in the testing cabin.