CN213068377U - VOC (volatile organic compound) tank cleaning instrument - Google Patents

Abstract

The utility model discloses a clear jar appearance of VOC, it relates to one kind and washs and makes the device of vacuum environment in the container. The intelligent four-position four-way valve comprises a case, the side of machine case be provided with seven cun screens, the main control circuit board sets up at quick-witted incasement portion, the main control circuit board links to each other with the controller, the controller links to each other with pressure sensor, pressure sensor links to each other with the quadbit cross valve, the quadbit cross valve passes through the thauma jar connecting pipe and the clamp links to each other with a plurality of thauma jars, the quadbit cross valve passes through two-way solenoid valves and links to each other with nitrogen cylinder and the trib. The utility model has the advantages of reasonable design, have and test hourglass and cleaning function, easy operation, convenient to use is reliable, and the practicality is strong.

Description

VOC (volatile organic compound) tank cleaning instrument

Technical Field

The utility model relates to a to wash in the container and make vacuum environment's device, concretely relates to clear jar appearance of VOC.

Background

The TO-14/TO-15 method of the United states EPA for determination of VOC in ambient air involves collecting air samples with a "SUMMA" electropolishing sampling jar and analyzing with GC. The method provides guidance on how to purify and test the sample tank by determining the concentration of residual VOC after purification. Therefore, the importance of adequately and properly cleaning the sample tank prior to use is not negligible.

But present sampling tank cleaning instrument function singleness, inconvenient carrying, and can't detect the gas tightness of sampling tank and gas circuit, promptly, can't examine whether take place to leak gas, can cause sample leakage and pollution because of leaking gas from this.

To sum up, the utility model designs a can effectively wash and make the device of vacuum environment, the clear jar appearance of VOC in to the container.

SUMMERY OF THE UTILITY MODEL

To the not enough of existence on the prior art, the utility model aims at providing a clear jar appearance of VOC, structural design is reasonable, has and tests hourglass and cleaning function, easy operation, and convenient to use is reliable, and the practicality is strong.

In order to achieve the above purpose, the present invention is realized by the following technical solution: the VOC tank cleaning instrument comprises a case, wherein a seven-inch screen is arranged on the side edge of the case, a main control circuit board is arranged inside the case and is connected with a controller, the controller is connected with a pressure sensor, the pressure sensor is connected with a four-position four-way valve, the four-position four-way valve is connected with a plurality of Suma tanks through Suma tank connecting pipes and clamps, the four-position four-way valve is connected with a nitrogen cylinder and a three-position three-way valve with a pressure sensor through two-way electromagnetic valves respectively, and the three-position three-way valve is connected.

Preferably, the top of the case is provided with two telescopic handles.

Preferably, a voltage switch is further disposed on the back of the chassis.

Preferably, 4-16 suma pots are arranged.

The apparatus is used for cleaning the container and making vacuum environment. The container is cleaned by repeatedly filling high-purity nitrogen and vacuumizing, and the container can obtain ideal vacuum.

The utility model has the advantages that: the utility model has the advantages of reasonable design, have and test hourglass and cleaning function, easy operation, convenient to use is reliable, and the practicality is strong.

Drawings

The present invention will be described in detail with reference to the accompanying drawings and specific embodiments;

FIG. 1 is a schematic diagram of the present invention;

fig. 2 is a schematic external structural view of the present invention;

fig. 3 is a schematic diagram of the internal structure of the present invention.

Detailed Description

In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand, the present invention is further described below with reference to the following embodiments.

Referring to fig. 1 to 3, the following technical solutions are adopted in the present embodiment: clear jar appearance of VOC, including quick-witted case A, quick-witted case A's side be provided with seven cun screens 1, main control circuit board 2 sets up inside quick-witted case A, main control circuit board 2 links to each other with controller 7, controller 7 links to each other with pressure sensor 9, pressure sensor 9 links to each other with four-bit cross valve 3, four-bit cross valve 3 links to each other with a plurality of suma jars 11 through suma jar connecting pipe 13 and clamp 4, four-bit cross valve 3 links to each other with nitrogen cylinder 5 and three-position three-way valve 6 that has pressure sensor 9 respectively through two-way solenoid valves 15, three-position three-way valve 6 links.

It is worth noting that the top of the case A is provided with two telescopic handles B.

It is noted that the back of the case a is further provided with a voltage switch 8.

In addition, 4-16 suma pots 4 are arranged.

The cleaning cycle of the instrument is four cycles, wherein the first three cycles are 1000mtorr each time, the last cycle is 40mtorr, and the cleaning cycle is four times. Each time, high purity nitrogen was charged at a dose of 28 psi. After the container is cleaned every time, the container is filled with nitrogen, and compared with a peak area graph of a ZF-PKU-VOC300 atmospheric volatile organic compound gas chromatograph continuous monitoring system, when the peak area is large and the peak is numerous, the container is proved to be cleaned. When the peak area is small and the peak is few, the container is proved not to be cleaned.

When this instrument is filling high-purity nitrogen gas repeatedly, when the evacuation, can take away the impurity in the container to with the container sanitization. The working principle is shown in figure 1

Instrumentation procedure for this embodiment

The high purity nitrogen cylinder was opened and its partial pressure was adjusted to 0.5 Mpa. (about 50 psi)

The instrument was powered on and the suma cans connected (4 suma cans cleaned at a time, if the number of suma cans cleaned at a time is less than 4, the other non-connected suma can connectors should be tightened with a wrench to prevent air leakage.

And opening instrument control software, popping up an interface, and setting related parameters.

And (6) leakage checking. After the Suma jar is connected, the leakage test is started, a hoop connected with the Suma jar is screwed down, then the relevant parameters of software are charged, and finally, a leakage test parameter button is clicked to start working. (this process takes approximately 120s, 60s is pumped first, then 60s begins to leak test.)

Cleaning the tank: and opening a valve of the Suma tank, clicking the starting parameter according to the called file parameter, and cleaning the tank. And after the cleaning is finished, closing the valve of the Suma tank, and finally closing the air source.

Closing the power supply of the instrument.

The instrument of the present embodiment is in the process of leak testing, cleaning and gas path trend. According to the figure 1, when the instrument is used for leakage detection, the valve of the Suma tank is required to be firstly ensured to be in a screwed-down closed state. Then the tank valve of the Suma tank is opened, the relevant parameters (refer to the previous figure list) of the viewing window software are reset on a system resetting interface, and the parameters, at the moment, the running state, the inflation pressure, the evacuation pressure, the running time and the period are reset, and the real-time feedback is started. And clicking the leakage checking parameters to achieve a leakage checking interface, setting the leakage checking timing to be 2 minutes, starting pressure and ending pressure, and feeding back in real time according to related parameters. And clicking to start, displaying the leakage checking state at the moment, checking the leakage, and displaying the normal state when the suma pot is not leaked. And after the leakage test is finished, clicking to stop.

When the instrument is washd, need to ensure that the jar valve of suma jar is in the open mode, then open the air supply, high-purity nitrogen gas steel bottle, the air supply requirement is: nitrogen gas, zero gas 0-50psi, and the system setting interface is reached, at this time, the inflation pressure, the cycle pressure and the ending pressure can present real-time feedback according to the current state, and the cycle period is set to 4 times. Click to run, at which point the instrument begins to clean the suma tank, the instrument is pumped at a speed >1L/min max vac <50 mTorr. The cleaning cycle is 4 cycles, the first three cycles are 1000mtorr, the fourth cycle is 40mtorr, and the cleaning is performed 4 times.

When air exhaust is started, the two-way electromagnetic valve is in a closed state, the valve of the Suma tank is in an open state, the pressure sensor starts to measure pressure, the scroll pump starts to work, and air in the Suma tank is exhausted to the outside.

The basic principles and the main features of the invention and the advantages of the invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (4)

1. The VOC tank cleaning instrument is characterized by comprising a case (A), the side edge of the case (A) is provided with a seven-inch screen (1), a main control circuit board (2) is arranged inside the case (A), the main control circuit board (2) is connected with a controller (7), the controller (7) is connected with a pressure sensor (9), the pressure sensor (9) is connected with a four-position four-way valve (3), the four-position four-way valve (3) is connected with a plurality of Suma tanks (11) through a Suma tank connecting pipe (13) and a hoop (4), the four-position four-way valve (3) is connected with a nitrogen cylinder (5) and a three-position three-way valve (6) with the pressure sensor (9) through two-way electromagnetic valves (15), and the three-position three-way valve (6) is connected with a turbo pump (10.
2. 2. The VOC can clearing device according to claim 1, wherein two retractable handles (B) are arranged on the top of the case (A).
3. 3. The VOC can cleaning device according to claim 1, wherein a voltage switch (8) is further disposed on the back of the case (A).
4. 4. A VOC canister purge apparatus according to claim 1 wherein there are 4-16 suma canisters (11).

Images