Foam dust settling device for gas extraction drilling

Abstract

The invention relates to the technical field of gas extraction detection, and discloses a gas extraction drilling foam dust fall device which comprises a base, a spraying plate is arranged on the surface of the base, a sliding groove is formed in the surface of the spraying plate, a plurality of spraying blocks are arranged through the sliding groove in a sliding mode, spraying openings are formed in the surfaces of the spraying blocks, and liquid passing pipes are installed on the sides, away from the spraying openings, of the spraying blocks. The liquid passing pipes are connected with external foam generating equipment through liquid conveying pipes, the detection box is arranged on the surface of the base and used for conducting fire detection on gas, the detection box is connected with the base through a sliding block, and the driving assembly is used for enabling the sliding block and the detection box to move. A detection cavity and a conveying cavity are formed in the detection box, the detection cavity extends to the bottom of the detection box and is provided with an opening, and a gas sensor and a CO sensor are arranged in the detection cavity. According to the invention, detection and dust fall are separated and carried out synchronously, so that the gas fire detection accuracy is effectively improved.

Description

Technical Field

[0001] The invention relates to the technical field of gas extraction detection, and in particular to a foam dust suppression device for gas extraction drilling. Background Art

[0002] In recent years, mining foam dust removal technology has been widely used in gas drilling and extraction operations due to its efficient dust suppression capabilities. Traditional devices generate stable foam by mixing a foaming agent with water. For gas environments, existing technologies use low-volatile foaming agent formulas and other technologies to use nozzles for directional spraying to cover the drilling surface, effectively wrapping and settling dust particles. The dust reduction efficiency is high, and it has a good control effect on dust suppression.

[0003] However, the physical and chemical interference generated during the foam injection process poses new challenges to the gas fire detection system. When the foam covers the top of the borehole outlet to reduce dust, it will hinder the diffusion of gas to the detection probe, resulting in concentration monitoring lag or distortion. In addition, the high-speed foam flow disturbs the airflow distribution in the borehole, which may form a local low-pressure area, change the natural migration path of the gas, and further affect the accuracy of fire warning. These problems make the existing foam dust removal technology and the gas fire detection system have potential safety risks when working together, and targeted optimization is urgently needed. Summary of the Invention

[0004] The object of the present invention is to provide a foam dust suppression device for gas extraction drilling to solve the problems raised by the above background technology.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: a foam dust suppression device for gas extraction drilling, comprising a base, a spray plate provided on the surface of the base, a chute provided on the surface of the spray plate, and a plurality of spray blocks sliding through the chute, a nozzle installed on the surface of the spray block, a liquid pipe installed on the side of the spray block away from the nozzle, and the plurality of liquid pipes connected to an external foam generating device via a liquid delivery pipe; A detection box disposed on the surface of the base is used to detect gas fires. The detection box is connected to the base via a slider and further includes a drive assembly for moving the slider and the detection box. The detection box is provided with a detection chamber and a delivery chamber, respectively. The detection chamber extends to the bottom of the detection box and is open. A gas sensor and a CO sensor are respectively provided in the detection chamber. A suction assembly for inhaling gas is provided on one side of the detection box; The synchronization component is used to move the plurality of spray blocks toward the two sides of the spray plate to avoid the detection area when the detection box moves toward the spray plate.

[0006] Preferably, a fixed block is fixedly connected to the surface of the spray plate near the center, the number of spray blocks distributed on both sides of the fixed block is the same, and the spray blocks on either side of the fixed block are connected by springs A.

[0007] Preferably, the synchronization component includes two pull ropes, which are respectively arranged on both sides of the detection box. One end of the pull rope is passed through the spray plate and extends in the slide groove. The bottom of the spray block near both sides of the fixed block is fixedly connected to a connecting block and is connected to the pull rope through the connecting block. The surface of the base is rotatably connected to two guide wheels B, and the end of the pull rope away from the spray block passes around the guide wheel B and is connected to the slider.

[0008] Preferably, protrusions are fixedly connected between adjacent spray blocks, and when adjacent protrusions abut against each other, the distance between two adjacent spray blocks is the smallest.

[0009] Preferably, both sides of the spray plate are rotatably connected to guide wheels A, and the pull rope passes around the surface of the guide wheels A.

[0010] Preferably, the suction assembly includes a plurality of delivery tubes, one end of the delivery tube is fixedly connected to the detection box and communicated with the delivery cavity, and the other end is fixedly connected to the air pump.

[0011] Preferably, the air pump is fixedly connected to the surface of the base, and a dust delivery pipe is fixedly connected to the end of the air pump away from the delivery pipe. The dust delivery pipe is arranged inside the base, and a backspray assembly is installed on the end of the dust delivery pipe away from the air pump.

[0012] Preferably, the back-spray assembly includes a dust return nozzle arranged at one end of the dust delivery pipe, and the spraying direction of the dust return nozzle is consistent with the spraying direction of the nozzle.

[0013] Preferably, the dust return nozzle is sleeved on the surface of the dust delivery pipe, the spray plate is fixedly connected to the dust return nozzle, and the dust return nozzle is connected to the base through a spring B.

[0014] Preferably, the driving assembly includes a motor fixedly connected to the surface of the base, an output end of the motor is fixedly connected to a screw, and the screw is threadedly connected to the slider.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The present invention provides a spray block that can slide on the spray plate. Accordingly, when gas fire detection is required, after the detection box is moved forward to the drill hole position, several spray blocks are moved to both sides. While ensuring that the foam spraying and dust reduction function continues, an independent gas detection area can be reserved for the detection box, retaining the natural flow path of gas in the drill hole, and effectively reducing the airflow disturbance caused by the foam spraying in the area, thereby improving the detection accuracy. Accordingly, several spray blocks located on both sides can continuously spray foam to form isolation during gas detection, effectively reducing the risk of coal ash dust overflow during gas detection, and improving the compatibility of detection and dust reduction.

[0016] Furthermore, after extracting gas from an independent detection area for fire detection, the air pump can further spray the detected dust gas through the dust delivery pipe and the dust return nozzle to the bottom of the spray block, and the foam sprayed from the nozzle will settle, effectively combining detection and sedimentation, integrating processing, and reducing repeated equipment configuration. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the present invention for illustrating the internal structure of the spray plate; Figure 3 This is a schematic diagram of the present invention for illustrating the bottom structure of the spray plate; Figure 4 This is a schematic diagram of the present invention for showing the spray block in a conventional spraying and dust removal state; Figure 5 This is a schematic diagram of the present invention for showing that the spray block is moving to both sides to avoid the detection area; Figure 6 This is a cross-sectional view of the present invention used to show the base and the internal structure of the detection box.

[0018] In the figure: 1. Base; 2. Spray plate; 21. Fixed block; 22. Spray block; 221. Nozzle; 222. Liquid pipe; 223. Liquid delivery pipe; 23. Spring A; 231. Bump; 24. Connecting block; 241. Pull rope; 242. Guide wheel A; 243. Guide wheel B; 3. Detection box; 31. Slider; 32. Detection chamber; 321. Delivery chamber; 322. Gas sensor; 323. CO sensor; 33. Delivery pipe; 331. Air pump; 332. Dust delivery pipe; 333. Dust return nozzle; 334. Spring B; 4. Motor; 41. Screw. DETAILED DESCRIPTION

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0020] The embodiment of the present invention discloses a foam dust suppression device for gas extraction drilling, such as Figure 1 and Figure 2 As shown, it includes a base 1, a spray plate 2 is provided on the surface of the base 1, a slide groove is opened on the surface of the spray plate 2, and a number of spray blocks 22 slide through the slide groove, a nozzle 221 is installed on the surface of the spray block 22, and a liquid pipe 222 is installed on the side of the spray block 22 away from the nozzle 221. The liquid pipe 222 is connected to the nozzle 221, and the several liquid pipes 222 are connected to the external foam generating equipment through the liquid delivery pipe 223.

[0021] Among them, several liquid pipes 222 are all hoses, such as rubber hoses, polyethylene hoses, etc., which have corrosion resistance and high strength and can be deformed. Several liquid pipes 222 are fixedly connected to the surface of the liquid delivery pipe 223. One end of the liquid delivery pipe 223 is directly connected to the external foam generating equipment. The external foam generating equipment includes foam dust reduction liquid proportioning equipment, compressed air supply equipment and foam generator and other equipment. The foam that can settle the coal ash dust is supplied to the liquid delivery pipe 223 and is passed to the nozzle 221 through multiple liquid pipes 222 for spraying. The nozzle 221 is an atomizing nozzle 221 and can be set to an adjustable flow type atomizing nozzle 221. It is adaptively adjusted according to the distance from the drill hole, the amount of coal ash dust, etc. After the nozzle 221 sprays out the atomized foam, the coal ash dust is settled. And since several spray blocks 22 slide in the slide groove, the spraying position thereof can be adjusted by adjusting the spray blocks 22 in the slide groove.

[0022] like Figure 3 and Figure 4As shown, in this embodiment, a detection box 3 is further included, which is arranged on the surface of the base 1, and is used to detect fire of gas. The detection box 3 is connected to the base 1 through a slider 31. The top of the slider 31 is fixedly connected to the detection box 3, and the slider 31 slides within the base 1 within a limited position. A driving component for moving the slider 31 and the detection box 3 is also included. Through the setting of the driving component, the slider 31 can be driven to slide within the base 1, and the detection box 3 can be moved toward or away from the spray plate 2. A detection chamber 32 and a conveying chamber 321 are respectively provided in the detection box 3. The detection chamber 32 extends to the bottom of the detection box 3 and is opened. The opening is used for gas to enter. A gas sensor 322 and a CO sensor 323 are respectively provided in the detection chamber 32. A suction component for inhaling gas is provided on one side of the detection box 3, and a synchronization component is provided for moving a plurality of spray blocks 22 toward both sides of the spray plate 2 to avoid the detection area when the detection box 3 moves toward the spray plate 2.

[0023] Specifically, by setting up the synchronization component, when the detection box 3 is moved to the front position of the spray plate 2 for gas detection, several spray blocks 22 are synchronously moved to both sides of the spray plate 2 to avoid the detection area, and foam dust is sprayed on both sides of the detection area, while the central detection area leaves an independent space for gas fire detection, wherein the suction component generates negative pressure in the detection chamber 32 and the delivery chamber 321 in the detection box 3, and a low-pressure area is generated in the detection chamber 32, which attracts the gas gushing out from the drill hole to enter, and then the gas sensor 322 and the CO sensor 323 in the detection chamber 32 are used to detect the gas. The gas and CO content in the body is tested to see if the concentration exceeds the standard and whether there is a fire risk. Furthermore, by setting up a conveying chamber 321, the internal cavity is longer, which can facilitate the gas to stay for a longer time when passing through it, and the conveying chamber 321 is separated from the outside, and the gas can be isolated and dried therein. Gas and CO sensors can be additionally set in the conveying chamber 321 to further detect the data and compare it with the gas and CO data just after entering, so as to further reduce the problem of moisture in the gas caused by external dust falling and affecting the detection data.

[0024] It is worth noting that gas fire detection can be carried out at certain intervals. Under normal conditions, the spray block 22 is in a state of spraying and reducing dust at fairly uniform intervals on the surface of the spray plate 2. By setting the time interval, such as selecting the time interval based on the gas drilling depth, time, drilling force, etc., when the interval time is reached, the detection box 3 is pushed out, and the spray block 22 avoids to both sides for gas detection. The duration of the gas detection is determined according to the actual drilling situation to ensure stable and accurate detection.

[0025] like Figure 2As shown, in this embodiment, a fixed block 21 is fixedly connected to the surface of the spray plate 2 near the center position, and the number of spray blocks 22 distributed on both sides of the fixed block 21 is the same, and the several spray blocks 22 on any side of the fixed block 21 are connected by a spring A23, and the two ends of the spring A23 are fixedly connected to the two spray blocks 22 respectively. When the spring A23 is in a normal relaxed state, the distance between the two spray blocks 22 is the largest, and the spray blocks 22 near the inner walls on both sides of the slide are also connected with springs A23, and are connected to the inner walls of the slide through the springs A23. When the several springs A23 are all in a relaxed state, the distances between the several spray blocks 22 are quite large, and the spray blocks 22 near the fixed block 21 abut against one side of the fixed block 21. Through the setting of the spring A23, it is convenient to keep the same distance between the several spray blocks 22, so that the spraying effect is consistent and the dust reduction range is stable.

[0026] Furthermore, in this embodiment, the synchronization component includes two pull ropes 241, which are respectively arranged on both sides of the detection box 3. One end of the pull rope 241 is passed through the spray plate 2 and extends in the slide groove. The bottom of the spray block 22 on both sides of the fixed block 21 is fixedly connected to the connecting block 24, and is connected to the pull rope 241 through the connecting block 24. The surface of the base 1 is rotatably connected to two guide wheels B243, and the end of the pull rope 241 away from the spray block 22 passes around the guide wheel B243 and is connected to the slider 31.

[0027] Specifically, when the slider 31 drives the top detection box 3 to move toward the spray plate 2, the slider 31 will synchronously pull the pull rope 241. Since the pull rope 241 bypasses the guide wheel B243 to change direction, the end of the pull rope 241 located in the slide groove will pull the spray block 22 closest to the fixed block 21, causing the spray block 22 to move toward the two sides of the spray plate 2. Since the spray blocks 22 are connected by springs A23, the movement of the spray block 22 close to the fixed block 21 will compress the springs A23 between the adjacent spray blocks 22, causing the spray blocks 22 to move toward each other. As the distance between the nozzle blocks 22 approaches and is compressed, the injection areas of the nozzle blocks 22 gradually turn to the positions on both sides of the nozzle plate 2, thereby leaving space for gas extraction and detection in the central area. Furthermore, although the nozzle blocks 22 move toward the positions on both sides of the nozzle plate 2, the springs A23 between the nozzle blocks 22 are compressed, so that the distance between the nozzle blocks 22 is reduced and the injection density is increased, which further strengthens the isolation and dust reduction strength of the coal ash dust on both sides of the borehole mouth, reduces the possibility of coal ash dust leakage and overflow, and has a good effect on sealing and dust reduction of the borehole mouth.

[0028] Furthermore, protrusions 231 are fixedly connected between adjacent spray blocks 22. When adjacent protrusions 231 abut against each other, the distance between two adjacent spray blocks 22 is minimized. By setting the protrusions 231, the minimum distance between adjacent spray blocks 22 is determined, ensuring that after the spring A23 is compressed, the distances between several adjacent spray blocks 22 are kept consistent.

[0029] Both sides of the spray plate 2 are rotatably connected to guide wheels A242, and the pull rope 241 passes around the surface of the guide wheel A242. The guide wheel A242 is provided to reduce the wear of the pull rope 241 during the movement.

[0030] like Figure 4 As shown, in this embodiment, the suction component includes a plurality of delivery pipes 33. The number of delivery pipes 33 is selected according to the gas extraction amount, gas extraction pressure, etc. In this article, two are selected and respectively arranged on both sides of the detection box 3. One end of the delivery pipe 33 is fixedly connected to the detection box 3 and connected to the delivery chamber 321. The other end is fixedly connected to the air pump 331. By setting the air pump 331, the air pump 331 extracts the gas in the delivery pipe 33 when it is working, forming a negative pressure, and then the gas in the delivery chamber 321 and the detection chamber 32 is sucked into the delivery pipe 33. Through the continuous output of the air pump 331, the external gas is continuously sucked into the detection chamber 32 for detection.

[0031] Furthermore, in this embodiment, the air pump 331 is fixedly connected to the surface of the base 1, and a dust delivery pipe 332 is fixedly connected to the end of the air pump 331 away from the delivery pipe 33, the output end of the air pump 331 is connected to the inside of the dust delivery pipe 332, and the suction end of the air pump 331 is connected to the inside of the delivery pipe 33, the dust delivery pipe 332 is arranged inside the base 1, and a back-spray assembly is installed at the end of the dust delivery pipe 332 away from the air pump 331. The gas after passing through the air pump 331 will pass into the dust delivery pipe 332, and finally the gas will be sprayed out through the back-spray assembly. The back-spray assembly is arranged below the nozzle 221, and the detected gas can be sent back and continue to be dusted through the foam sprayed from the nozzle 221, effectively combining detection and sedimentation, without the need for additional sedimentation equipment for detecting gas, thereby improving integrity.

[0032] Among them, the return spray component includes a dust return nozzle 333 arranged at one end of the dust delivery pipe 332. The spray direction of the dust return nozzle 333 is consistent with the spray direction of the nozzle 221. The diameter of the dust return nozzle 333 is selected according to the coal ash dust content and the spraying pressure in the gas detection gas. The detected gas is sprayed to the bottom of the nozzle 221 through the dust return nozzle 333, and the gas mixed with coal ash dust is settled by the foam that naturally settles after being sprayed out from the nozzle 221.

[0033] The dust return nozzle 333 is sleeved on the surface of the dust delivery pipe 332, and the spray plate 2 is fixedly connected to the dust return nozzle 333. The dust return nozzle 333 is connected to the base 1 through the spring B334. The dust return nozzle 333 can slide on the surface of the dust delivery pipe 332 and compress the spring B334, and the spray plate 2 can synchronize the movement of the dust return nozzle 333 to move away from or close to the drilling hole.

[0034] Specifically, after the pull rope 241 pulls several spray blocks 22 toward the two sides of the spray plate 2 and makes several protrusions 231 press against each other, the spray blocks 22 can no longer move toward the two sides of the spray plate 2. Furthermore, in the process of the detection box 3 and the slider 31 continuing to move forward, the pull rope 241 continues to pull. Since the spray block 22 is positioned at this time, the pull rope 241 will pull the entire spray plate 2 to move backward, and the spray plate 2 drives the dust return nozzle 333 to compress the spring B334, so that the dust return nozzle 333 slides on the surface of the dust delivery pipe 332, that is, the spray plate 2 moves in the opposite direction of the movement direction of the detection box 3, so that the spray block 22 and the nozzle 221 are away from the detection area, reducing the initial spraying position of the nozzle 221 due to the high foam flow rate, resulting in low air pressure, and thus reducing the disturbance of the gas, thereby improving the stability of gas extraction detection.

[0035] The driving assembly includes a motor 4 fixedly connected to the surface of the base 1. The motor 4 is a servo motor. The output end of the motor 4 is fixedly connected to a screw 41. The screw 41 is threadedly connected to the slider 31. The output of the motor 4 drives the screw 41 to rotate, and then the slider 31 that rotates with the screw 41 can move back and forth along the surface of the screw 41, thereby realizing the forward and backward movement of the detection box 3.

[0036] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A foam dust suppression device for gas extraction drilling, comprising a base (1), characterized in that: A spray plate (2) is provided on the surface of the base (1), a slide groove is provided on the surface of the spray plate (2), and a plurality of spray blocks (22) slide through the slide groove, a spray port (221) is installed on the surface of the spray block (22), a liquid pipe (222) is installed on the side of the spray block (22) away from the spray port (221), and the plurality of liquid pipes (222) are connected to an external foam generating device via a liquid delivery pipe (223); A detection box (3) is provided on the surface of the base (1) and is used for detecting fires caused by gas. The detection box (3) is connected to the base (1) via a slider (31) and further includes a driving assembly for moving the slider (31) and the detection box (3). A detection chamber (32) and a conveying chamber (321) are respectively provided in the detection box (3). The detection chamber (32) extends to the bottom of the detection box (3) and is open. A gas sensor (322) and a CO sensor (323) are respectively provided in the detection chamber (32). A suction assembly for inhaling gas is provided on one side of the detection box (3); The synchronization component is used to move the plurality of spray blocks (22) toward the two sides of the spray plate (2) to avoid the detection area when the detection box (3) moves toward the spray plate (2).

2. A foam dust suppression device for gas extraction drilling according to claim 1, characterized in that: A fixed block (21) is fixedly connected to the surface of the spray plate (2) near the center, the number of spray blocks (22) distributed on both sides of the fixed block (21) is the same, and the spray blocks (22) on any side of the fixed block (21) are connected via springs A (23).

3. The foam dust suppression device for gas extraction drilling according to claim 2, characterized in that: The synchronization component includes two pull ropes (241), which are respectively arranged on both sides of the detection box (3). One end of the pull rope (241) is passed through the spray plate (2) and extends in the slide groove. The bottoms of the spray blocks (22) on both sides of the fixed block (21) are fixedly connected with connecting blocks (24) and are connected to the pull rope (241) through the connecting blocks (24). The surface of the base (1) is rotatably connected to two guide wheels B (243). The end of the pull rope (241) away from the spray block (22) passes around the guide wheel B (243) and is connected to the slider (31).

4. The foam dust suppression device for gas extraction drilling according to claim 2, characterized in that: A protrusion (231) is fixedly connected between adjacent spray blocks (22), and when adjacent protrusions (231) abut against each other, the distance between two adjacent spray blocks (22) is the smallest.

5. The foam dust suppression device for gas extraction drilling according to claim 3, characterized in that: Both sides of the spray plate (2) are rotatably connected to guide wheels A (242), and the pull rope (241) passes around the surface of the guide wheel A (242).

6. The foam dust suppression device for gas extraction drilling according to claim 1, characterized in that: The suction assembly comprises a plurality of delivery tubes (33), one end of the delivery tubes (33) is fixedly connected to the detection box (3) and communicated with the delivery cavity (321), and the other end is fixedly connected to the air pump (331).

7. The foam dust suppression device for gas extraction drilling according to claim 6, characterized in that: The air pump (331) is fixedly connected to the surface of the base (1), and a dust delivery pipe (332) is fixedly connected to one end of the air pump (331) away from the delivery pipe (33); the dust delivery pipe (332) is arranged inside the base (1), and a back-spray assembly is installed at one end of the dust delivery pipe (332) away from the air pump (331).

8. The foam dust suppression device for gas extraction drilling according to claim 7, characterized in that: The return spray assembly comprises a dust return nozzle (333) arranged at one end of the dust delivery pipe (332); the spraying direction of the dust return nozzle (333) is consistent with the spraying direction of the nozzle (221).

9. The foam dust suppression device for gas extraction drilling according to claim 8, characterized in that: The dust return nozzle (333) is sleeved on the surface of the dust delivery pipe (332), the spray plate (2) is fixedly connected to the dust return nozzle (333), and the dust return nozzle (333) is connected to the base (1) via a spring B (334).

10. The foam dust suppression device for gas extraction drilling according to claim 1, characterized in that: The driving assembly comprises a motor (4) fixedly connected to the surface of the base (1), the output end of the motor (4) being fixedly connected to a screw (41), and the screw (41) being threadedly connected to the slider (31).

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