CN218725810U - Soil gas monitoring well gas tightness test integrate device - Google Patents
Soil gas monitoring well gas tightness test integrate device Download PDFInfo
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- CN218725810U CN218725810U CN202222836691.1U CN202222836691U CN218725810U CN 218725810 U CN218725810 U CN 218725810U CN 202222836691 U CN202222836691 U CN 202222836691U CN 218725810 U CN218725810 U CN 218725810U
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- sealed cowling
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Abstract
The utility model discloses an integrated device for testing air tightness of a soil gas monitoring well, which comprises a sealing cover, wherein a walking mechanism is arranged on the outer wall of the sealing cover near the bottom of the sealing cover, a handle is fixedly arranged at the top of the sealing cover, the outer wall of the sealing cover is provided with an air inlet pipe and an exhaust pipe in a penetrating way, a first valve is arranged on the air inlet pipe, and a second valve is arranged on the exhaust pipe; this device is through with the sealed cowling, negative pressure sampling case, vacuum pump etc. carry out the integrated design, make the structure compacter, need not the scene to assemble when being convenient for transport, thereby ensure the leakproofness of device, it is more convenient to use, setting through handle and running gear, when needs carry out short distance removal to the device, only need rotate the screw rod through the hand wheel, utilize the screw rod to move down with the screw-thread fit drive universal wheel of backup pad, so that universal wheel and ground contact, and jack-up the sealed cowling, can promote the sealed cowling, in order to remove through the whole device of universal wheel pair.
Description
Technical Field
The utility model relates to an air tightness test field specifically is a soil gas monitoring well air tightness test integrate device.
Background
The soil gas is a gas phase component in soil pores in the aeration zone of the site and is used for evaluating the pollution status of volatile organic compounds in the site. The air tightness of the soil gas monitoring well plays a vital role in whether representative soil gas can be collected or not.
A tracer gas method for detecting the air tightness of a soil gas monitoring well is provided in the local standard 'survey of volatile organic compounds in a polluted site and risk assessment technical guide' (DB 11/T1278-2015) in Beijing City. However, most of the parts in the air tightness detection system mentioned in the guidance are independent devices, and need to be temporarily assembled when being used on site, so that the operation is complicated, the air tightness of the system is difficult to guarantee, and the system is inconvenient to transport and move and needs to be improved.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a soil gas monitoring well gas tightness test integrate device to solve the problem that proposes among the above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme:
the utility model provides a soil gas monitoring well gas tightness test integrate device, includes the sealed cowling, the outer wall of sealed cowling is close to bottom department and installs running gear, the top fixed mounting of sealed cowling has the handle, the outer wall of sealed cowling runs through and is provided with intake pipe and blast pipe, install first valve in the intake pipe, install the second valve on the blast pipe, the outer wall fixedly connected with vacuum pump and the negative pressure sampling case of sealed cowling, the air inlet of vacuum pump is through the gas outlet intercommunication of first connecting pipe with negative pressure sampling case, and installs the third valve on the first connecting pipe, the air inlet of negative pressure sampling case has the hose through second connecting pipe intercommunication, the second connecting pipe runs through the outer wall of sealed cowling, the hose is located the sealed cowling, and the air inlet of hose installs the joint.
As a further aspect of the present invention: the outer wall of negative pressure sampling case is provided with the sample connection, can dismantle on the sample connection and be connected with sealed lid.
As a further aspect of the present invention: and the second connecting pipe is provided with a flowmeter and a pressure gauge.
As a further aspect of the present invention: the outer wall of the sealing cover is provided with a control host, the outer wall of the control host is provided with a display screen, a button and three knobs, and the three knobs are in one-to-one correspondence with the first valve, the second valve and the third valve.
As a further aspect of the present invention: the running gear includes a plurality of backup pads of fixing on the sealed cowling outer wall, the top of backup pad is connected with the screw rod through the screw hole cooperation, the top fixed mounting of screw rod has the hand wheel, the bottom of screw rod is rotated and is connected with the universal wheel.
As a further aspect of the present invention: the use method of the integrated device comprises the following steps:
the method comprises the following steps: connecting a joint at the end part of a hose with an air duct of a soil gas monitoring well, covering a sealing cover on the outer side of the soil gas monitoring well, and then communicating a trace gas storage tank with an air inlet pipe;
step two: opening the first valve and the second valve to discharge the original gas in the sealing cover through the exhaust pipe while introducing the inert tracer gas into the sealing cover;
step three: collecting gas samples in the closed cover at the outlet end of the exhaust pipe at intervals, and analyzing the concentration of the inert tracer gas by using an inert gas concentration detector;
step four: after the concentration of the tracer gas in the closed cover is not lower than 50%, closing the first valve and the second valve, starting the vacuum pump, and adjusting the vacuum degree of the negative pressure sampling box by operating the third valve so as to sample the soil gas;
step five: after a soil gas sample with required amount is collected, sampling is carried out through a sampling port, and the concentration of inert tracer gas in the soil gas sample is detected by using an inert gas concentration detector;
step six: if the concentration of the inert tracer gas in the soil gas sample is lower than 10%, the air tightness of the soil gas monitoring well is considered to meet the technical requirement, if the concentration is higher than 10%, the soil gas monitoring well is abandoned, and the soil gas monitoring well meeting the technical requirement of air tightness is newly built outside the range of the diameter of the well being 1.5 m.
Compared with the prior art, the beneficial effects of the utility model are that:
1. this device is through with the sealed cowling, negative pressure sampling case, vacuum pump etc. carry out the integrated design, make the structure compacter, need not the scene to assemble when being convenient for transport, thereby ensure the leakproofness of device, it is more convenient to use, setting through handle and running gear, when needs carry out short distance removal to the device, only need rotate the screw rod through the hand wheel, utilize the screw rod to move down with the screw-thread fit drive universal wheel of backup pad, so that universal wheel and ground contact, and jack-up the sealed cowling, can promote the sealed cowling, in order to remove through the whole device of universal wheel pair.
Drawings
FIG. 1 is a schematic structural diagram of an integrated device for testing air tightness of a soil gas monitoring well.
FIG. 2 is a schematic cross-sectional view of a sealing cover in an integrated device for testing air tightness of a soil gas monitoring well.
FIG. 3 is a schematic structural diagram of a traveling mechanism in the integrated device for testing the air tightness of the soil gas monitoring well.
The device comprises a sealing cover 1, a handle 2, an air inlet pipe 3, a first valve 4, an exhaust pipe 5, a second valve 6, a negative pressure sampling box 7, a flow meter 8, a pressure gauge 9, a sampling port 10, a vacuum pump 11, a hose 12, a connector 13, a control host 14, a display screen 15, a supporting plate 16, a screw 17, a hand wheel 18, a universal wheel 19, a knob 20, a key 21 and a third valve 22.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Please refer to fig. 1-3, in an embodiment of the present invention, an integrated device for testing air tightness of a soil gas monitoring well includes a sealing cover 1, the sealing cover 1 is a square box with an open bottom, and the size of the length, width and height of the sealing cover is 40-60cm, a traveling mechanism is installed on the outer wall of the sealing cover 1 near the bottom, a handle 2 is fixedly installed on the top of the sealing cover 1, an air inlet pipe 3 and an air outlet pipe 5 are provided on the outer wall of the sealing cover 1 in a penetrating manner, a first valve 4 is installed on the air inlet pipe 3, a second valve 6 is installed on the air outlet pipe 5, a vacuum pump 11 and a negative pressure sampling box 7 are fixedly connected on the outer wall of the sealing cover 1, the specific model of the vacuum pump 11 is XH-CYQ 5-8L, the air inlet of the vacuum pump 11 is communicated with the air outlet of the negative pressure sampling box 7 through a first connecting pipe, the volume of the negative pressure sampling box 7 is 1-4L, a third valve 22 is installed on the first connecting pipe, the air inlet of the negative pressure sampling box 7 is communicated with a hose 12, the second connecting pipe is communicated with a hose 12, and a hose connector 13 is installed on the sealing cover 1.
The outer wall of negative pressure sampling case 7 is provided with sample connection 10, can dismantle on the sample connection 10 and be connected with sealed lid.
The second connecting pipe is provided with a flowmeter 8 and a pressure gauge 9, the measuring range of the flowmeter 8 is 0-10L/min, the precision is 0.1L/min, the specific model is DFG-6T, one end of the flowmeter 8 is communicated with the pressure gauge 9, the other end of the flowmeter 8 is communicated with a hose 12, the measuring range of the pressure gauge 9 is 0-50kPa/100kPa, the precision is 0.1kPa, and the specific model is MIK-Y290.
The outer wall of the sealing cover 1 is provided with a main control unit 14, the outer wall of the main control unit 14 is provided with a display screen 15, a key 21 and three knobs 20, the three knobs 20 correspond to the first valve 4, the second valve 6 and the third valve 22 one by one, a PLC (programmable logic controller) is arranged in the main control unit 14, the display screen 14 and the key 21 are assemblies carried by the PLC, the first valve 4, the second valve 6 and the third valve 22 are all electrically operated valves, and the three knobs 20 are knob coding switches and are respectively used for controlling the opening and closing degrees of the corresponding first valve 4, the corresponding second valve 6 and the corresponding third valve 22.
Running gear includes a plurality of backup pads 16 of fixing on the 1 outer wall of sealed cowling, the top of backup pad 16 is connected with screw rod 17 through the screw hole cooperation, the top fixed mounting of screw rod 17 has hand wheel 18, the bottom of screw rod 17 is rotated and is connected with universal wheel 19, rotates behind the screw rod 17 through hand wheel 18, can utilize screw rod 17 and backup pad 16's screw-thread fit drive universal wheel 19 to remove downwards to make universal wheel 19 and ground contact, and jack-up sealed cowling 1, can promote sealed cowling 1, in order to remove through universal wheel 19.
The application method of the integrated device comprises the following steps:
the method comprises the following steps: connecting a connector 13 at the end part of a hose 12 with an air duct of a soil gas monitoring well, covering a sealing cover 1 on the outer side of the soil gas monitoring well, and then communicating a trace gas storage tank with an air inlet pipe 3;
step two: opening a first valve 4 and a second valve 6 to discharge the original gas in the sealing cover 1 through an exhaust pipe 5 while introducing the inert tracer gas into the sealing cover 1;
step three: collecting gas samples in the closed cover 1 at the outlet end of the exhaust pipe 5 at intervals, and analyzing the concentration of the inert tracer gas by using an inert gas concentration detector;
step four: after the concentration of the tracer gas in the closed cover 1 is not lower than 50%, closing the first valve 4 and the second valve 6, starting the vacuum pump 11, and regulating the vacuum degree of the negative pressure sampling box 7 by operating the third valve 22 so as to sample the soil gas;
step five: after a soil gas sample with required amount is collected, sampling is carried out through a sampling port 10, and the concentration of inert tracer gas in the soil gas sample is detected by using an inert gas concentration detector;
step six: if the concentration of the inert tracer gas in the soil gas sample is lower than 10%, the air tightness of the soil gas monitoring well is considered to meet the technical requirement, if the concentration is higher than 10%, the soil gas monitoring well is abandoned, and the soil gas monitoring well meeting the technical requirement of air tightness is newly built outside the range of the diameter of the well being 1.5 m.
In the process of constructing the soil gas monitoring well in the actual field, the device is used for detecting the air tightness of the monitoring well, and the result is shown in table 1; and compared with the system airtightness of the field assembly device described in DB11/T1278-2015, the specific method is to start the vacuum pump 11 to pump until the negative pressure gauge displays the reading of 35KPa, then close the vacuum pump 11, continuously observe the reading of the negative pressure gauge for 5min and record the reading every 1min, and the result is shown in Table 2:
TABLE 1 the utility model discloses the device is to soil gas monitoring well gas tightness testing result
TABLE 2 the utility model discloses the device is compared with the system gas tightness of the on-site assembly device
The result shows that the result meets the requirement for detecting the air tightness of the soil gas monitoring well by using the device; and compared with the air tightness test result of the field assembly device system, the system air tightness of the device is superior to that of the assembly device. Therefore, this device can carry out effectual test to soil gas monitoring well gas tightness, and because this device is through with sealed cowling 1, negative pressure sampling case 7, vacuum pump 11 etc. carry out the integrated design, make the structure compacter, need not the scene when being convenient for transport and assemble, it is more convenient to use, setting through handle 2 and running gear, when needs carry out the short-distance removal to the device, only need rotate screw rod 17 through hand wheel 18, utilize screw rod 17 and backup pad 16's screw-thread fit drive universal wheel 19 to move down, so that universal wheel 19 and ground contact, and jack-up sealed cowling 1, can promote sealed cowling 1, in order to remove whole device through universal wheel 19.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.
Claims (5)
1. The utility model provides a soil gas monitoring well gas tightness test's device that integrates which characterized in that: including sealed cowling (1), the outer wall of sealed cowling (1) is close to bottom department and installs running gear, the top fixed mounting of sealed cowling (1) has handle (2), the outer wall of sealed cowling (1) runs through and is provided with intake pipe (3) and blast pipe (5), install first valve (4) on intake pipe (3), install second valve (6) on blast pipe (5), the outer wall fixedly connected with vacuum pump (11) and negative pressure sampling case (7) of sealed cowling (1), the air inlet of vacuum pump (11) is through the gas outlet intercommunication of first connecting pipe with negative pressure sampling case (7), and installs third valve (22) on the first connecting pipe, the air inlet of negative pressure sampling case (7) has hose (12) through second connecting pipe intercommunication, the second connecting pipe runs through the outer wall of sealed cowling (1), hose (12) are located sealed cowling (1), and the air inlet of hose (12) installs joint (13).
2. The integrated device for testing the air tightness of the soil gas monitoring well according to claim 1, wherein: the outer wall of negative pressure sampling case (7) is provided with sample connection (10), can dismantle on sample connection (10) and be connected with sealed lid.
3. The integrated device for testing the airtightness of the soil gas monitoring well according to claim 1, wherein: and a flowmeter (8) and a pressure gauge (9) are installed on the second connecting pipe.
4. The integrated device for testing the air tightness of the soil gas monitoring well according to claim 1, wherein: the outer wall of the sealing cover (1) is provided with a control host (14), the outer wall of the control host (14) is provided with a display screen (15), a key (21) and three knobs (20), and the three knobs (20) are in one-to-one correspondence with the first valves (4), the second valves (6) and the third valves (22).
5. The integrated device for testing the airtightness of the soil gas monitoring well according to claim 1, wherein: running gear includes a plurality of backup pads (16) of fixing on sealed cowling (1) outer wall, the top of backup pad (16) is connected with screw rod (17) through the screw hole cooperation, the top fixed mounting of screw rod (17) has hand wheel (18), the bottom of screw rod (17) is rotated and is connected with universal wheel (19).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222836691.1U CN218725810U (en) | 2022-10-27 | 2022-10-27 | Soil gas monitoring well gas tightness test integrate device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222836691.1U CN218725810U (en) | 2022-10-27 | 2022-10-27 | Soil gas monitoring well gas tightness test integrate device |
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| Publication Number | Publication Date |
|---|---|
| CN218725810U true CN218725810U (en) | 2023-03-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222836691.1U Active CN218725810U (en) | 2022-10-27 | 2022-10-27 | Soil gas monitoring well gas tightness test integrate device |
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| CN (1) | CN218725810U (en) |
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- 2022-10-27 CN CN202222836691.1U patent/CN218725810U/en active Active
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