Geogas collection device and collection method

Abstract

The invention provides a geogas collection device and a collection method. The geogas collection device comprises a drill rod body and a collection head, the collecting head comprises a collecting cylinder and a drill bit part, the top of the drill bit part is fixedly connected with a suction cylinder, a through suction hole is formed in the side wall of the suction cylinder, a collecting cavity is formed in the collecting cylinder, and the top of the suction cylinder is connected with the lower end of the drill rod body. The geogas collecting device has the beneficial effects that the geogas collecting device can be used for drilling a geogas collecting hole; when the drill rod body is lifted, the collecting barrel and the drill bit part of the collecting head can be separated up and down, and the air extracting barrel above the drill bit part is exposed, so that the air extracting device can quickly extract earth gas in the earth gas collecting hole. The blocking block can block the geogas collecting hole in the drilling and lifting process of the drill rod body, so that external air can be prevented from entering the geogas collecting hole, and the content and purity of geogas in collected gas are improved. The geogas collection method is simple to operate, the difficulty of field geogas collection can be greatly reduced by using the geogas collection method, and the geogas collection efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the field of geochemistry, and in particular to a ground gas collection device and a collection method. Background Art

[0002] Nano-metal particles in the surface gas are closely related to deep metal minerals. The collection and measurement of ground gas can effectively help the exploration of hidden minerals. There are two types of ground gas methods: active gas extraction and passive adsorption. The passive method does not require any gas extraction device, but the collector device must be placed at the sampling point for several days. However, this method has the disadvantages of being time-consuming and having a low collection rate. The active gas extraction method is to directly drill a deep hole at the sampling point with a steel chisel as a ground gas collection hole, and then use a gas extraction device (air pump or syringe) to extract the gas in the ground gas collection hole. The existing active gas extraction method and ground gas extraction device have the following difficulties: it is difficult to seal the orifice of the ground gas collection hole during the drilling process, which easily leads to air mixing and ground gas escape, so the quality of ground gas collection cannot be guaranteed; the existing ground gas extraction device usually needs to be equipped with a power device, which has the disadvantages of complex structure, difficult operation, and inconvenient transportation, and is difficult to apply to field operations. Summary of the invention

[0003] In view of this, the present invention provides a ground gas collection device, including a drill rod body and a collection head;

[0004] A collection channel is provided inside the drill rod body; a through-hole is provided on the upper side wall of the drill rod body, and the hole is connected to the collection channel; a sealing block can also be slidably sleeved on the drill rod body;

[0005] The collection head includes a collection tube and a drill head, the top of the drill head is fixedly connected to a vacuum tube, the side wall of the vacuum tube is provided with a through vacuum hole, a collection cavity is provided inside the collection tube, the vacuum tube can slidably extend from the bottom of the vacuum tube to the collection cavity in the collection tube, and the top of the vacuum tube is connected to the lower end of the drill rod body.

[0006] Furthermore, an impact joint is provided on the top of the drill rod body, and the impact joint is used to connect an impact drilling device.

[0007] Furthermore, an air extraction joint is provided on the top of the collection tube, the air extraction joint is communicated with the collection chamber, and the air extraction joint extends into the collection channel.

[0008] Furthermore, an air extraction hose is provided in the collection channel, the lower end of the air extraction hose is connected to the air extraction joint, the upper end of the air extraction joint extends out of the drill pipe body from the air accommodating hole, and the upper end of the air extraction joint is used to connect the air extraction device.

[0009] Furthermore, the blocking block is made of rubber, and the lower part of the blocking block is a truncated cone structure that is thick at the top and thin at the bottom.

[0010] Furthermore, the outer diameter of the collection tube is larger than the outer diameter of the drill pipe.

[0011] Furthermore, a drill rod handle is connected to the upper end of the drill rod body.

[0012] Furthermore, a cylindrical limit block is provided at the top of the vacuum cylinder, a limit sleeve is connected to the bottom of the collection cylinder, a limit hole is provided at the bottom of the limit sleeve, the limit block is located in the collection cylinder, the outer diameter of the limit block is smaller than the inner diameter of the collection cylinder, and the outer diameter of the limit block is larger than the diameter of the limit hole.

[0013] Furthermore, the outer wall of the vacuum cylinder is provided with a plurality of annular vacuum grooves, and the vacuum holes are located in the vacuum grooves.

[0014] The present invention also provides a method for collecting ground gas, which uses the above-mentioned ground gas collection device and comprises the following steps:

[0015] S1: Connect the air hole or the collection tube to the air extraction device;

[0016] S2: Slide the blocking block to the lower end of the drill pipe body;

[0017] S3: supporting the ground gas collection device on the ground for ground gas collection; drilling the ground gas collection device into the soil to a predetermined depth to obtain a ground gas collection hole;

[0018] S4: Press the blocking block to block the top of the ground gas collection hole, and raise the height of the drill rod body to expose the air pump from the collection tube;

[0019] S5: Use a gas extraction device to extract ground gas and collect the gas in the hole.

[0020] The ground gas collection device and collection method of the present invention have the following beneficial effects: the ground gas collection device includes a drill rod body and a collection head; a collection channel is provided inside the drill rod body; a through-hole for accommodating gas is provided on the side wall of the upper end of the drill rod body; the collection head includes a collection tube and a drill head, a vacuum tube is fixedly connected to the top of the drill head, a through-hole for accommodating gas is provided on the side wall of the vacuum tube, a collection cavity is provided inside the collection tube, and the top of the vacuum tube is connected to the lower end of the drill rod body. The ground gas collection device can be drilled into the soil under the action of the impact punching device to drill a ground gas collection hole; lifting the drill rod body can separate the collection tube and the drill head of the collection head from top to bottom, so that the vacuum tube above the drill head is exposed, so that the vacuum device can extract the ground gas in the ground gas collection hole. At the same time, a blocking block is also slidably provided on the drill rod body, and the blocking block can block the ground gas collection hole during the drilling and lifting process of the drill rod body, so as to prevent outside air from entering the ground gas collection hole and improve the content and purity of the ground gas in the collected gas. The ground gas collection device has the advantages of simple structure, reliability and portability. The ground gas collection method of the present invention is simple to operate and is suitable for field operation scenarios. Utilizing the ground gas collection method can greatly reduce the difficulty of field ground gas collection and improve the ground gas collection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of a ground gas collection device according to an embodiment of the present invention.

[0022] Figure 2 It is a schematic diagram of the internal structure of a collection head of a ground gas collection device according to an embodiment of the present invention.

[0023] Figure 3 It is a schematic structural diagram of a ground gas collection device in operation according to an embodiment of the present invention.

[0024] In the above figure: 1-drill rod body, 11-impact joint, 12-air accommodating hole, 2-collection tube, 21-exhaust joint, 3-drill head, 31-exhaust tube, 32-limiting block, 33-exhaust groove, 34-exhaust hole, 4-limiting sleeve, 5-sealing block, 6-exhaust hose, 7-drill rod handle, 8-impact drilling device, 81-impact weight block, 82-connecting block. DETAILED DESCRIPTION

[0025] To make the objectives, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0026] Please refer to Figures 1 to 3 A ground gas collection device of the present invention includes a drill rod body 1 and a collection head.

[0027] The drill rod body 1 is a hollow tube, and a collection channel is provided inside the drill rod body 1; a penetrating air accommodating hole 12 is provided on the upper side wall of the drill rod body 1, and the air accommodating hole 12 is connected to the collection channel; a blocking block 5 can also be slidably sleeved on the drill rod body 1; in this embodiment, the blocking block 5 is made of rubber, and the lower part of the blocking block 5 is a truncated cone structure that is thick at the top and thin at the bottom.

[0028] The collection head includes a collection tube 2 and a drill head 3. The lower part of the drill head 3 is a pointed cone structure, which is convenient for drilling into the ground for collecting ground gas. A hollow vacuum cylinder 31 is fixedly connected to the top of the drill head 3. The side wall of the vacuum cylinder 31 is provided with a through vacuum hole 34. A collection cavity is provided inside the collection tube 2. The vacuum cylinder 31 can be slidably extended from the bottom of the vacuum cylinder 31 to the collection cavity of the collection tube 2. The top of the vacuum cylinder 31 is connected to the lower end of the drill rod body 1 by threaded connection.

[0029] When the ground gas collection device is in use, the whole device is vertical, the air pump 31 is slidably stored in the collection tube 2, and the collection head and the drill rod body 1 are drilled into the soil of the ground where the ground gas is collected by using the impact punching device 8 or directly hitting with a heavy object to drill a ground gas collection hole; wherein the blocking block 5 can block the ground gas collection hole to prevent the ground gas in the ground gas collection hole from escaping or the outside air from mixing in; when the depth of the ground gas collection hole reaches the predetermined depth, the height of the drill rod body 1 is raised to separate the collection tube 2 and the drill head 3 of the collection head from top to bottom, so that the air pump 31 above the drill head 3 is exposed, and the ground gas in the ground gas collection hole is extracted by the air pump device through the accommodating hole 12. The ground gas collection device has the advantages of simple structure, reliability and portability.

[0030] In a preferred embodiment, an impact joint 11 is provided at the top of the drill rod body 1, and the impact joint 11 is used to connect the impact drilling device 8. In this embodiment, the impact drilling device 8 includes a sliding sleeve, an impact weight 81 and an impact rod, the top of the impact rod is slidably arranged in the sliding sleeve, the impact weight 81 is fixed on the top of the sliding sleeve, and a connecting block 82 is provided at the lower end of the impact rod, and the connecting block 82 is threadedly connected to the impact joint 11. By quickly moving the sliding sleeve downward, the impact weight 81 can exert a downward impact force on the impact rod, thereby drilling the collection head and the drill rod body 1 into the soil of the ground where the ground gas is collected. It can be understood that the impact joint 11 can also be directly used as a knocking head, and the knocking head can be knocked by a heavy object (such as a hammer or a stone).

[0031] In a preferred embodiment, a suction connector 21 is further provided on the top of the collection tube 2, the suction connector 21 is connected to the collection chamber, and the suction connector 21 extends into the collection channel. A suction hose 6 is provided in the collection channel, the lower end of the suction hose 6 is connected to the suction connector 21, the upper end of the suction connector 21 extends from the air accommodating hole 12 out of the drill pipe body 1, and the upper end of the suction connector 21 is used to connect a suction device.

[0032] In a preferred embodiment, the outer diameter of the collection tube 2 is slightly larger than the outer diameter of the drill pipe body 1. This reduces the contact area between the entire device and the inner wall of the ground gas collection hole, thereby reducing the friction resistance when the collection tube 2 is lifted.

[0033] In a preferred embodiment, a drill rod handle 7 is also connected to the upper end of the drill rod body 1 , and the drill rod handle 7 is vertically connected to the upper end of the drill rod body 1 .

[0034] In a preferred embodiment, a cylindrical stop block 32 is provided at the top of the vacuum cylinder 31, and a stop sleeve 4 is connected to the bottom of the collection cylinder 2, and the stop sleeve 4 is connected to the inner wall of the collection cylinder 2 by threads. A stop hole is provided at the bottom of the stop sleeve 4, and the stop block 32 is located in the collection cylinder. The outer diameter of the stop block 32 is smaller than the inner diameter of the collection cylinder 2, and the outer diameter of the stop block 32 is larger than the diameter of the stop hole. The stop sleeve 4 is used to prevent the drill head 3 and the vacuum cylinder from falling off from the collection cylinder 2.

[0035] In a preferred embodiment, the outer wall of the vacuum cylinder 31 is also provided with a plurality of annular vacuum grooves 33, and the vacuum grooves 33 enable the vacuum cylinder 31 to form a bamboo structure, and the vacuum holes 34 are located in the vacuum grooves 33. The vacuum grooves 33 can prevent the soil falling off the inner wall of the ground gas collection hole from blocking the vacuum holes 34.

[0036] The present invention also provides a method for collecting ground gas, which uses the above-mentioned ground gas collection device and comprises the following steps:

[0037] S1: Connect the air accommodating hole or the collecting tube 2 to the air extraction device. In this embodiment, the connection process is: connect the air extraction connector 21 on the collecting tube 2 with the air extraction hose 6, and the air extraction hose 6 passes through the air accommodating hole and is connected to the air extraction device.

[0038] S2: Slide the blocking block 5 to the lower end of the drill rod body 1.

[0039] S3: Support the ground gas collection device on the ground for ground gas collection; drill the ground gas collection device into the soil to a predetermined depth to obtain a ground gas collection hole.

[0040] S4: Press the blocking block 5 to block the top of the ground gas collection hole, and raise the height of the drill rod body 1 to expose the air pump 31 from the collection tube.

[0041] When pressing the blocking block 5 and raising the height of the drill rod body 1 , the blocking block 5 can be stepped on by the foot.

[0042] S5: Use a gas extraction device to extract ground gas and collect the gas in the hole.

[0043] The ground gas collection method of the present invention is simple to operate and is suitable for field operation scenarios. Utilizing the ground gas collection method can greatly reduce the difficulty of field ground gas collection and improve the ground gas collection efficiency.

[0044] In this document, the directional words such as front, back, top, and bottom are defined by the positions of the components in the drawings and the positions of the components relative to each other, and are only for the sake of clarity and convenience in expressing the technical solution. It should be understood that the use of the directional words should not limit the scope of protection claimed in this application.

[0045] In the absence of conflict, the above embodiments and features in the embodiments may be combined with each other.

[0046] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A ground gas collection device, characterized in that: It includes a drill rod body and a collection head; A collection channel is provided inside the drill rod body; a through-hole is provided on the upper side wall of the drill rod body, and the hole is connected to the collection channel; a sealing block can also be slidably sleeved on the drill rod body; The collection head includes a collection tube and a drill head, the top of the drill head is fixedly connected to a vacuum tube, the side wall of the vacuum tube is provided with a through vacuum hole, a collection cavity is provided inside the collection tube, the vacuum tube can slidably extend from the bottom of the vacuum tube to the collection cavity in the collection tube, and the top of the vacuum tube is connected to the lower end of the drill rod body.

2. A ground gas collection device according to claim 1, characterized in that: An impact joint is provided on the top of the drill rod body, and the impact joint is used to connect an impact drilling device.

3. The ground gas collection device according to claim 1, characterized in that: A suction joint is also provided on the top of the collection tube, the suction joint is communicated with the collection chamber, and the suction joint extends into the collection channel.

4. A ground gas collection device according to claim 3, characterized in that: An air extraction hose is provided in the collection channel, the lower end of the air extraction hose is connected to the air extraction joint, the upper end of the air extraction joint extends out of the drill pipe body from the air accommodating hole, and the upper end of the air extraction joint is used to connect the air extraction device.

5. The ground gas collection device according to claim 1, characterized in that: The blocking block is made of rubber, and the lower part of the blocking block is a truncated cone structure that is thick at the top and thin at the bottom.

6. The ground gas collection device according to claim 1, characterized in that: The outer diameter of the collection tube is larger than the outer diameter of the drill pipe.

7. The ground gas collection device according to claim 1, characterized in that: The upper end of the drill rod body is also connected with a drill rod handle.

8. The ground gas collection device according to claim 1, characterized in that: A cylindrical limit block is provided on the top of the vacuum cylinder, a limit sleeve is connected to the bottom of the collection cylinder, a limit hole is provided at the bottom of the limit sleeve, the limit block is located in the collection cylinder, the outer diameter of the limit block is smaller than the inner diameter of the collection cylinder, and the outer diameter of the limit block is larger than the diameter of the limit hole.

9. The ground gas collection device according to claim 1, characterized in that: The outer wall of the air pump cylinder is also provided with a plurality of annular air pumping grooves, and the air pumping holes are located in the air pumping grooves.

10. A method for collecting ground gas, characterized in that: The method uses a ground gas collection device as described in any one of claims 1 to 9, and the method comprises the following steps: S1: Connect the air hole or the collection tube to the air extraction device; S2: Slide the blocking block to the lower end of the drill pipe body; S3: supporting the ground gas collection device on the ground for ground gas collection; drilling the ground gas collection device into the soil to a predetermined depth to obtain a ground gas collection hole; S4: Press the blocking block to block the top of the ground gas collection hole, and raise the height of the drill rod body to expose the air pump from the collection tube; S5: Use a gas extraction device to extract ground gas and collect the gas in the hole.

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