CN218610642U - Hydrocarbon tester is from adsorption column belt cleaning device in area - Google Patents
Hydrocarbon tester is from adsorption column belt cleaning device in area Download PDFInfo
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- CN218610642U CN218610642U CN202222769448.2U CN202222769448U CN218610642U CN 218610642 U CN218610642 U CN 218610642U CN 202222769448 U CN202222769448 U CN 202222769448U CN 218610642 U CN218610642 U CN 218610642U
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Abstract
The utility model discloses an adsorption column cleaning device of a hydrocarbon tester, which comprises a clean water container, a clean water pipe, a water suction pump, a through needle, a waste liquid suction pipe, a vacuum pump, a waste liquid pipe, a vacuum suction pipe, an adsorption column and a waste liquid bottle, wherein the water suction pump and the vacuum pump are connected with a working power supply; the waste liquid bottle is provided with a sealing cover, one end of the purified water pipe is connected with a water suction pump, the other end of the purified water pipe extends into the purified water container, the water suction pump extends into the adsorption column through a through needle, and the lower end of the adsorption column penetrates through the sealing cover through a lower suction pipe and extends into the waste liquid bottle; a waste liquid suction pipe is arranged in the adsorption column and connected with a waste liquid pipe through a manual valve, and the waste liquid pipe penetrates through the sealing cover and extends into the waste liquid bottle; the vacuum pump is connected to the waste liquid bottle through the vacuumizing pipe. The utility model discloses can directly wash the adsorption column under the condition that need not take off the adsorption column follow instrument.
Description
Technical Field
The utility model relates to a belt cleaning device especially relates to an adsorption column belt cleaning device of hydrocarbon tester from area.
Background
The national standard GB/T11132 'fluorescence indicator adsorption method for determining liquid petroleum product hydrocarbons' stipulates that the fluorescence indicator is adopted to display main hydrocarbons in the liquid petroleum product on an adsorption column of a precise inner-diameter glass tube, so that the content of the hydrocarbons in a sample to be measured, which is expressed by volume percentage, can be calculated. The content can be used as the quality detection index of fuel oil such as engine fuel, aviation fuel and the like.
The hydrocarbon detector for liquid petroleum product is a special instrument for detecting hydrocarbon content in liquid petroleum product by adopting fluorescent indicator adsorption method. In this instrument, there is a key and specific device, the adsorption column, in which the test is performed. The adsorption column is made of glass, and has a cylindrical shape with a slightly thicker upper part and a thinner lower part, a hollow interior and different inner diameters. The total length of the adsorption column is about 1615mm. The inner diameter changes from top to bottom in turn:
the section of 150mm at the uppermost end is phi 12mm; the section of 50mm is phi 2mm; the 190mm section is phi 5mm; the 25mm section is phi 2mm; the 1200mm section at the lowest end is phi 1.5mm.
Generally, each instrument adsorption column is divided into two branches which are fixedly arranged on the instrument. After each test, the inner diameter of the adsorption column needs to be cleaned. Since the adsorption column is made of glass, the structure is complicated and very fine, and thus, it is very difficult to clean.
The usual cleaning methods are: the adsorption column is taken down from the instrument and is taken to a position close to a tap water faucet, and a special cleaning pipe is used, wherein one end of the special cleaning pipe is connected to the tap water faucet, and the other end of the special cleaning pipe is a slender cleaning pipe with the caliber of 1 mm. The flushing pipe is used for feeding tap water from the top end of the adsorption column, gradually extending the flushing pipe downwards while flushing until the inner diameter of the whole adsorption column is completely cleaned, then vertically hanging the adsorption column, and draining water in the inner diameter of the adsorption column for later use.
The disadvantages and shortcomings present:
1. because the adsorption column is made of glass, the structure is complex, the manufacture is fine, the price is high, the adsorption column needs to be taken down from the instrument and then installed in each cleaning, the adsorption column can be damaged by carelessness, and the defect of potential safety hazard exists.
2. The complexity of cleaning is determined by the long and thin structure of the adsorption column and the special characteristics of different inner diameters. Two persons are generally required to be well matched during cleaning, one person is responsible for taking the adsorption column, and the other person slowly injects tap water into the aperture of the adsorption column, so that the defect of difficult cleaning exists.
3. The special construction of the adsorption column causes inconvenience in cleaning. On one hand, the operator is nervous in mind when cleaning the adsorption column; on the other hand, the cleaning of the adsorption column is time-consuming and labor-consuming, and the complete machine has the defect of low instrument technology grade.
Therefore, the development of a cleaning device for an adsorption column of a hydrocarbon tester is an urgent problem to be solved by those skilled in the art.
SUMMERY OF THE UTILITY MODEL
The utility model provides a solve above-mentioned not enough, provide a hydrocarbon tester from adsorption column belt cleaning device in area, can directly wash the adsorption column under the condition that need not take off adsorption column follow instrument.
The above object of the present invention is achieved by the following technical solutions: an adsorption column cleaning device carried by a hydrocarbon tester comprises a clean water container, a purified water pipe, a water suction pump, a through needle, a waste liquid suction pipe, a vacuum pump, a waste liquid pipe, a vacuum suction pipe, an adsorption column and a waste liquid bottle, wherein the water suction pump and the vacuum pump are connected with a working power supply; the waste liquid bottle is provided with a sealing cover, one end of the purified water pipe is connected with a water suction pump, the other end of the purified water pipe extends into the purified water container, the water suction pump extends into the adsorption column through a through needle, and the lower end of the adsorption column penetrates through the sealing cover through a lower suction pipe and extends into the waste liquid bottle; a waste liquid suction pipe is arranged in the adsorption column and connected with a waste liquid pipe through a manual valve, and the waste liquid pipe penetrates through the sealing cover and extends into the waste liquid bottle; the vacuum pump is connected to the waste liquid bottle through the vacuumizing pipe.
Furthermore, a water purification pipe required by cleaning is provided with an interface on a control panel of the instrument, so that the connection of the water purification pipe is convenient.
Furthermore, the through needle required for cleaning is provided with an interface on a control panel of the instrument, so that the connection of the through needle is facilitated.
Furthermore, a clean water supply switch required by cleaning is arranged on a control panel of the instrument, and whether water is supplied or not can be directly controlled on the control panel.
Furthermore, a negative pressure suction switch of the waste liquid bottle required by cleaning is arranged on a control panel of the instrument, and whether suction is performed or not can be directly controlled on the control panel.
Furthermore, a control knob of a waste liquid suction valve in the adsorption column is arranged on a control panel of the instrument, and whether waste liquid in the adsorption column is sucked or not can be directly controlled on the control panel.
Furthermore, a water purification suction pump and a negative pressure vacuum pump which are required by cleaning are arranged inside the instrument.
The utility model discloses an all cleaning device direct mount are in the instrument, and washing control switch etc. then install on instrument control panel, and suction tube, flushing pipe then leave the interface on the instrument and can directly insert. After the test is finished, the adsorption column cleaning device carried by the instrument is started, the adsorption column does not need to be taken down, the instrument does not need to be moved, a tap is not needed to be connected, only more than 200mL of cleaning water is needed to be prepared, and the inner diameter of the adsorption column can be directly cleaned on the instrument.
Compared with the prior art, the utility model the advantage be:
1. has the advantages of reasonable structure and strong practicability:
the utility model discloses a structure is installed in the inside of instrument, installs 5 associated pieces again on instrument control panel, only needs external more than 200mL to wash the water purification, prepares the waste liquid collecting bottle, has just realized the instrument from taking adsorption column belt cleaning device's function, can directly wash the internal diameter of adsorption column on the instrument, has rational in infrastructure, the advantage that the practicality is strong.
2. Has the advantages of safe cleaning of the adsorption column:
because the cleaning device for the adsorption column of the instrument is realized, the cleaned adsorption column does not need to be taken down for cleaning, and the adsorption column does not need to be installed after cleaning, so that the unsafe defect that the adsorption column is easy to damage in the processes of dismounting, cleaning and installing is overcome, and the cleaning device has the advantage of safe cleaning of the adsorption column.
3. Has the advantages of time saving, water saving and labor saving in the cleaning of the adsorption column:
because the cleaning device for the adsorption column is arranged on the instrument, the cleaned adsorption column does not need to be taken down for cleaning, and the adsorption column does not need to be installed after cleaning, the defects of time consumption and labor consumption in the prior art are overcome, and the cleaning device for the adsorption column has the advantages of time saving, water saving and labor saving in cleaning the adsorption column.
4. Has the advantages of improving the technical grade of the instrument:
the utility model discloses a mode of instrument self-carrying adsorption column belt cleaning device has rationally solved the washing problem of liquid petroleum product hydrocarbons test instrument's key device-adsorption column, has realized that the adsorption column washs safety, convenience, saves time, saves labour, is applied to behind the liquid petroleum product hydrocarbons test instrument, has the advantage that improves instrument technology grade.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic structural diagram of a specific application example of the present invention.
Fig. 3 is a schematic structural diagram of the instrument control panel of the present invention.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
As shown in figure 1, the adsorption column cleaning device provided by the hydrocarbon tester comprises a cleaning water container 17, a clean water pipe 13, a water pump 3, a through needle 4, a waste liquid suction pipe 5, a vacuum pump 9, a waste liquid pipe 10, a vacuum tube 11, an adsorption column 12 and a waste liquid bottle 16, wherein the water pump 3 and the vacuum pump 9 are connected with a working power supply 1; a sealing cover 15 is arranged on the waste liquid bottle 16, one end of the water purifying pipe 13 is connected with the water suction pump 3, the other end of the water purifying pipe extends into the clean water container 17, the water suction pump 3 extends into the adsorption column 12 through the through needle 4, and the lower end of the adsorption column 12 penetrates through the sealing cover 15 through the lower suction pipe 14 and extends into the waste liquid bottle 16; a waste liquid suction pipe 5 is arranged in the adsorption column 12, the waste liquid suction pipe 5 is connected with a waste liquid pipe 10 through a manual valve 7, and the waste liquid pipe 10 penetrates through a sealing cover 15 and extends into a waste liquid bottle 16; the vacuum pump 9 is connected to a waste bottle 16 through an evacuation tube 11.
Wherein:
a working power supply 1, the utility model discloses well electropneumatic controller's power supply.
The water supply switch 2 and the control switch K1 of the micro water pump 3 control the working state of the micro water pump 3.
The water flow direction is shown by the arrow below the water pump 3 and a miniature one-way water pump (CSB). Which serves to feed the cleaning water in the measuring cup 17 into the upper port of the adsorption column 12.
The through needle 4 and a water outlet thin tube of the micro water pump 3, which is called as a through needle, send cleaning water into the adsorption column 12 in a high-pressure mode.
A waste liquid suction pipe 5 and a hose for sucking waste liquid in the adsorption column, wherein one end of the hose is connected with the water inlet of the manual valve 7, and the other end of the hose is extended into the adsorption column 12.
And the valve knob 6 controls the working state of the valve 7 by opening and closing the knob of the manual valve 7.
The manual valve 7, the miniature one-way liquid manual valve (FM), the water flow direction is shown by the arrow below the valve. For feeding the waste liquid in the adsorption column to the waste liquid bottle 16.
The suction switch 8 and the control switch K2 of the micro vacuum pump 9 control the working state of the micro vacuum pump 9.
The vacuum pump 9 and the micro vacuum pump (ZKB) are used for pumping the waste liquid bottle 16 to a certain range so as to form a negative pressure state in the waste liquid bottle 16. After the manual valve 7 is opened, the waste liquid sucked from the adsorption column 12 is automatically introduced into the waste liquid bottle 16 through the waste liquid tube 10 due to the negative pressure state in the waste liquid bottle 16.
A waste liquid pipe 10 and a waste liquid conveying hose, one end of which is connected with the water outlet of the manual valve 7, and the other end of which is connected with the liquid inlet section of a waste liquid bottle 16.
One end of the vacuum tube 11 is connected with the suction port of the vacuum pump 9, and the other end is connected with the waste liquid bottle 16, and the vacuum tube is used for pumping air from the waste liquid bottle 16 by the vacuum pump 9 so as to form negative pressure in the waste liquid bottle 16.
The adsorption column 12, the object of the present invention, the adsorption column schematic of the liquid petroleum product hydrocarbon analyzer.
And a water purifying pipe 13, a cleaning water purifying hose, one end of which is connected with the water inlet of the water pump 3 and the other end of which is arranged in the clean water of the cleaning water container 17.
The lower suction pipe 14 and the flexible pipe are connected with the lowest end outlet of the adsorption column 12 at one end and the inlet of the waste liquid bottle 16 at the other end, and in the final stage of the cleaning of the adsorption column 12, the residual waste liquid in the adsorption column 12 is automatically sucked into the waste liquid bottle 16 due to the action of the negative pressure in the waste liquid bottle 16.
A sealing cover 15 and a sealing cover of the waste liquid bottle 16, wherein the sealing cover and the bottle mouth of the waste liquid bottle 16 need to be sealed; on the other hand, the waste liquid tube 10, the evacuation tube 11, and the lower suction tube 14 inserted into the sealing cap are required to be sealed at the contact portion with the sealing cap when the sealing cap is inserted, so as to ensure a negative pressure state in the waste liquid bottle.
A waste liquid bottle 16, the utility model discloses the waste liquid collecting bottle when wasing adsorption column 12.
The utility model discloses a wash the flow:
1. a clean water container 17 is prepared, and at least 200mL of clean water is filled, and a clean water pipe 13 is placed in the clean water container 17.
2. The circuit and all pipelines of the utility model are connected, the waste liquid bottle 16 is emptied and the sealing state is checked and confirmed to be good, and the working power supply is switched on.
3. The suction switch 8 is turned on, the vacuum pump 9 works, and a set negative pressure state is formed in the waste liquid bottle 16.
4. The knob 6 of the valve is rotated manually to open the valve 7, and the waste liquid tube 5 extracts the waste liquid in the adsorption column 12 and sends the waste liquid to the waste liquid bottle 16 through the waste liquid tube 10.
5. And (3) starting the water supply switch 2, operating the water suction pump 3, injecting cleaning purified water into the adsorption column 12 through the through needle 4, continuously extracting mixed liquid of waste liquid and water in the adsorption column 12 through the waste liquid pipe 5, and slowly extending the through needle 4 downwards in the process.
6. When the waste liquid tube 5 is empty and can be pumped out, the knob 6 of the manual rotary valve closes the manual valve 7, and the final residual liquid in the adsorption column 12 flows into the waste liquid bottle 16 from the bottom outflow port through the lower suction tube 14.
7. After the waste liquid in the adsorption column 12 is completely extracted and washed clean, the water purifying pipe 13 is taken out from the clean water container 17, and when no water flows out from the through needle 4, the water supply switch 2 is closed, and the water suction pump 3 stops working.
8. The suction switch 8 is closed and the vacuum pump 9 stops working.
At this point, the inner diameter cleaning of the adsorption column is finished.
As shown in fig. 2, the structure of the embodiment of the present invention is schematically illustrated. In fig. 2:
the cleaning water container A1 is arranged on the workbench, and is filled with cleaning water with the inner diameter of the adsorption column and the volume not less than 200mL.
And a clean water pipe A2, a hose for drawing clean water from the clean water container A1 and connected to the clean water pipe interface A6 on the instrument panel.
Instrument main part A3, embodiment instrument main part, the utility model discloses install in this instrument main part.
Adsorption column A4, installed in the left side of the left adsorption column.
The instrument control panel A5 is described in detail in fig. 3.
A water purification pipe connector A6, a joint for connecting the water purification pipe A2, and a detailed view in figure 3.
A stylet hub A7 for receiving a connector of the stylet A8, as shown in detail in fig. 3.
The through needle A8 is a washing thin tube which is called as a through needle and is used for sending clean water into the adsorption column 12 in a high-pressure mode, one end of the through needle is connected with a through needle connector A7, and the water outlet end of the through needle extends into the inner diameter of the adsorption column A11.
The manual waste water valve A9 is used for manually controlling the working state of a waste liquid suction valve arranged in the instrument, and is shown in detail in figure 3.
And one end of the waste liquid suction pipe A10 is connected with the water inlet of the manual waste water valve A9, and the other end of the waste liquid suction pipe A is arranged in the adsorption column A11 for sucking waste liquid.
And the adsorption column A11 is arranged on the right side of the device. In this embodiment, the adsorption column a11 is cleaned.
The suction switch a12 controls the operation of the micro vacuum pump installed inside the apparatus, as shown in detail in fig. 3.
And a water supply switch A13 for controlling the working state of the micro water pump installed inside the instrument, as shown in detail in FIG. 3.
The adsorption column fixing parts A14 are respectively arranged on the upper part and the lower part of each adsorption column, and fix the adsorption columns on the instrument main body A3.
An instrument cover a15, and a front cover of the instrument main body 13.
The lower suction tube A16 and the flexible tube have one end connected to the tail end outflow port of the adsorption column A11 and the other end connected to the liquid inlet of the waste liquid bottle A19. In the final stage of cleaning the adsorption column A11, the residual waste liquid in the adsorption column A11 is automatically sucked into the waste liquid bottle A19 under the action of the negative pressure in the waste liquid bottle A19.
One end of the waste liquid inlet pipe A17 is connected into the waste liquid bottle A19, and the other end is connected with the water outlet of the manual waste water valve A9 in the instrument.
One end of the air exhaust tube A18 is connected into the waste liquid bottle A19, the other end of the air exhaust tube A is connected with an air exhaust port of the vacuum pump in the instrument, and when the vacuum pump works, a certain negative pressure is formed in the waste liquid bottle A19.
The waste liquid bottle A19 is arranged in the instrument, and when the adsorption column is cleaned, the bottle needs to be emptied, and a negative pressure state is formed in the bottle. The vial is removed and slightly enlarged for ease of illustration.
In FIG. 3: and the water purifying pipe interface A6 is arranged on the water purifying pipe interface of the instrument control panel. One end of the interface is used for connecting a purified water pipe leading to the cleaning purified water container, and the other end of the interface is connected with the inlet end of a water suction pump arranged in the instrument.
The needle passing interface A7 is arranged on the needle passing interface of the instrument control panel. The through needle is a thin tube which sends clean water into the adsorption column in a high-pressure mode for washing. One end of the interface is used for connecting a joint of the through needle, and the other end of the interface is connected with the outlet end of a water suction pump arranged in the instrument.
The suction switch a12 controls the operation state of the micro vacuum pump installed inside the apparatus. When the switch is turned on, the micro vacuum pump works to pump air out of the waste liquid bottle, so that a certain negative pressure state is formed in the waste liquid bottle.
And a manual waste water valve A9 for manually controlling the working state of the waste liquid suction valve arranged in the instrument. The inlet end of the valve is exposed outside the instrument and is connected with a waste liquid suction pipe. The outlet end of the waste liquid suction valve is arranged in the instrument and is connected with one end of a waste liquid inlet pipe, and the other end of the waste liquid inlet pipe is connected with the liquid inlet of the waste liquid bottle.
And the water supply switch A13 controls the working state of a miniature water pump arranged in the instrument, the miniature water pump works by starting the switch, purified water is extracted from the cleaning water container through a purified water pipe, and the cleaning water is sent to the inner diameter of the adsorption column for flushing in a high-pressure mode through a through needle connected to a through needle connector A7.
Referring to fig. 2, the method of cleaning the adsorption column of the present embodiment is as follows:
1. a clean water container is prepared and filled with not less than 200mL of clean water.
2. And (4) connecting the water purifying pipe to the water purifying interface of the control panel, and placing the water purifying pipe in the purified water for cleaning the water purifying container.
3. And (3) removing the waste liquid in the waste liquid bottle, connecting the lower suction pipe to the tail end outlet of the adsorption column and the waste liquid bottle inlet, and checking that the liquid inlet pipe and the exhaust pipe on the waste liquid bottle cap are well sealed.
4. And connecting a waste liquid suction pipe of a waste water valve on the control panel, and placing a suction port of the waste liquid suction pipe in the adsorption column.
5. The through needle is connected with a through needle interface of the control panel, and the through needle is held by hand to place a through needle water outlet in the adsorption column.
6. The waste liquid valve is opened manually.
7. The suction switch of the control panel is firstly turned on, the micro vacuum pump in the instrument works, and the waste liquid bottle is vacuumized to a certain degree.
8. The waste liquid suction tube placed in the adsorption column sucks waste liquid and the like into the waste liquid bottle.
9. And then a water supply switch of the control panel is turned on, a miniature water suction pump in the instrument works, high-pressure water is sprayed out of a water outlet of the through needle to disperse impurities such as silica gel in the adsorption column, and the impurities and waste liquid are sucked into the waste liquid bottle by the waste liquid suction pipe.
10. Along with the waste liquid is continuously sucked away, the through needle continuously and slowly extends in the adsorption column. And finally, the impurities and the waste liquid in the adsorption column flow out from the tail end of the adsorption column and are sucked into a waste liquid bottle.
11. And (5) washing the interior of the adsorption column by using the through needle once again up and down, and taking out the water purifying pipe in the cleaning water purifying container when no impurities or waste liquid exist. When the needle has no water to spray, the water supply switch on the control panel is closed, and the micro water pump in the instrument stops working.
12. The "pump" switch is closed and the micro vacuum pump in the instrument stops working.
13. The manual control valve is closed.
At this point, the inner diameter cleaning operation of one adsorption column of the apparatus of this embodiment is completed.
The above-mentioned only be the embodiment of the present invention, not consequently the restriction of the patent scope of the present invention, all utilize the equivalent structure or equivalent flow transform made of the content of the specification and the attached drawings, or directly or indirectly use in other relevant technical fields, all including in the same way the patent protection scope of the present invention.
Claims (7)
1. The utility model provides a hydrocarbon tester is from adsorption column belt cleaning device who takes which characterized in that: the device comprises a clean water container, a purified water pipe, a water suction pump, a through needle, a waste liquid suction pipe, a vacuum pump, a waste liquid pipe, a vacuum suction pipe, an adsorption column and a waste liquid bottle, wherein the water suction pump and the vacuum pump are connected with a working power supply; the waste liquid bottle is provided with a sealing cover, one end of the purified water pipe is connected with a water suction pump, the other end of the purified water pipe extends into the purified water container, the water suction pump extends into the adsorption column through a through needle, and the lower end of the adsorption column penetrates through the sealing cover through a lower suction pipe and extends into the waste liquid bottle; a waste liquid suction pipe is arranged in the adsorption column and connected with a waste liquid pipe through a manual valve, and the waste liquid pipe penetrates through the sealing cover and extends into the waste liquid bottle; the vacuum pump is connected to the waste liquid bottle through the vacuumizing pipe.
2. The device for cleaning the adsorption column of the hydrocarbon tester as claimed in claim 1, wherein: the water purifying pipe required by cleaning is provided with an interface on a control panel of the instrument, so that the connection of the water purifying pipe is convenient.
3. The hydrocarbon tester self-contained adsorption column cleaning device according to claim 1, characterized in that: the through needle required by cleaning is provided with an interface on a control panel of the instrument, so that the connection of the through needle is convenient.
4. The hydrocarbon tester self-contained adsorption column cleaning device according to claim 1, characterized in that: the clean water supply switch for cleaning is arranged on the control panel of the instrument, and the control panel can directly control whether to supply water or not.
5. The device for cleaning the adsorption column of the hydrocarbon tester as claimed in claim 1, wherein: the negative pressure suction switch of the waste liquid bottle required for cleaning is arranged on the control panel of the instrument, and the suction can be directly controlled on the control panel.
6. The device for cleaning the adsorption column of the hydrocarbon tester as claimed in claim 1, wherein: the control knob of the waste liquid suction valve in the adsorption column is arranged on the control panel of the instrument, and whether the waste liquid in the adsorption column is sucked or not can be directly controlled on the control panel.
7. The hydrocarbon tester self-contained adsorption column cleaning device according to claim 1, characterized in that: a water purification suction pump and a negative pressure vacuum pump which are required by cleaning are arranged inside the instrument.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222769448.2U CN218610642U (en) | 2022-10-20 | 2022-10-20 | Hydrocarbon tester is from adsorption column belt cleaning device in area |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222769448.2U CN218610642U (en) | 2022-10-20 | 2022-10-20 | Hydrocarbon tester is from adsorption column belt cleaning device in area |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218610642U true CN218610642U (en) | 2023-03-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222769448.2U Active CN218610642U (en) | 2022-10-20 | 2022-10-20 | Hydrocarbon tester is from adsorption column belt cleaning device in area |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218610642U (en) |
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2022
- 2022-10-20 CN CN202222769448.2U patent/CN218610642U/en active Active
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