Anti-freezing device for air pipe of drilling machine

Abstract

According to the anti-freezing device for the air pipe of the drilling machine, the alcohol anti-freezing tank is arranged on the air path pipeline, supplied to the drilling machine, of the draught fan, compressed air supplied by the draught fan is introduced into the alcohol anti-freezing tank, water vapor in airflow is absorbed through alcohol, and meanwhile part of alcohol vapor can be brought out through the airflow to be mixed into the airflow; therefore, water vapor in the airflow is prevented from condensing and freezing on the pipeline to block the pipeline, and the defect that in the compressed air supply process of a drilling machine, compressed air containing moisture is prone to condensing and freezing in an air duct air path under the air temperature condition to block the pipeline is overcome.

Description

Technical Field

[0001] The present application relates to the technical field of drilling rigs, and in particular to an antifreeze device for an air duct of a drilling rig. Background Art

[0002] Before blasting in mining and other projects, a drill is needed to drill holes to facilitate the placement of explosives. The commonly used equipment is a down-the-hole drill. The structure of a down-the-hole drill generally includes a drill bit, a drill rod, a drive mechanism, a down-transmission mechanism, a hydraulic system, and other parts. When working, the down-the-hole drill uses a hydraulic system to control the up and down movement of the frame and provide power to the drill bit. At the same time, the down-the-hole drill uses compressed air to drive the drill bit to drill holes. Compressed air is introduced into the impactor, and impact energy is generated through the reciprocating motion between the piston and the cylinder. This impact energy is transmitted to the drill bit, allowing the drill bit to dive into the bottom of the hole and generate an impact force that squeezes the rock. In addition, compressed air is also used to blow the sheared rock debris from the annular space between the drill rod and the hole wall to the outside of the hole, thereby forming a hole.

[0003] Therefore, the supply of compressed air is indispensable in the use of drilling rigs. The compressed air supplied by the fan is directly sucked from the environment and supplied to the drilling rig. The air contains a certain amount of moisture, but in the north, the winter weather is very cold, and the water vapor easily condenses in the air duct and forms frost and ice, causing the pipeline to be blocked, which may cause safety accidents in serious cases. Utility Model Content

[0004] The present application provides a drilling rig air duct antifreeze device to solve the safety problem that in the above-mentioned existing drilling rig compressed air supply process, the compressed air contains moisture, which is easy to condense and freeze in the air path of the air duct under air temperature conditions, causing pipeline blockage and other safety problems.

[0005] The present application provides a drilling rig air duct antifreeze device, comprising a fan, an alcohol antifreeze tank and a drilling rig connected in series in sequence;

[0006] A three-way valve is provided between the fan and the alcohol antifreeze tank;

[0007] A first valve is provided between the alcohol antifreeze tank and the drilling rig; the three-way valve is also connected to the first valve through a pipeline;

[0008] An air inlet and an air outlet are arranged above the side wall of the alcohol antifreeze tank;

[0009] An air guide pipe is arranged in the alcohol antifreeze tank, one end of the air guide pipe is connected with the air inlet, and the other end is close to the bottom of the alcohol antifreeze tank;

[0010] A multi-layer perforated plate is horizontally arranged in the alcohol antifreeze tank, and an air guide pipe is arranged through the multi-layer perforated plate.

[0011] Optionally, a defoaming plate is also horizontally arranged at the upper inner portion of the alcohol antifreeze tank, and the defoaming plate is close to the lower edge of the air outlet.

[0012] Optionally, the defoaming plate comprises a plate body with a plurality of through holes, and a plurality of inverted cone-shaped convex shells are arranged on the upper surface of the plate body;

[0013] The convex shell is connected with the through holes on the plate body in a one-to-one correspondence, and an opening is arranged at the top end of the convex shell.

[0014] Optionally, a dryer is also provided on the pipeline between the three-way valve and the first valve.

[0015] Optionally, the dryer comprises a housing, and the housing is wrapped with a thermal insulation layer;

[0016] The accommodating shell is filled with desiccant.

[0017] Optionally, the alcohol antifreeze tank is also connected to the alcohol supplement tank via a second valve;

[0018] A liquid level gauge is also provided in the alcohol antifreeze tank.

[0019] Optionally, the liquid level meter, the three-way valve, the first valve, and the second valve are all electrically connected to the controller.

[0020] The drilling rig air duct antifreeze device provided in the present application is implemented by arranging an alcohol antifreeze tank on the air path pipeline supplied by the fan to the drilling rig, and passing the compressed air supplied by the fan into the alcohol antifreeze tank to absorb the water vapor in the air flow by using the alcohol. At the same time, a part of the alcohol vapor can be brought out by the air flow and mixed into the air flow, thereby preventing the water vapor in the air flow from condensing and freezing on the pipeline and clogging the pipeline, thereby overcoming the disadvantage that in the compressed air supply process of some drilling rigs, the compressed air contains moisture, which is easy to condense and freeze in the air path of the air duct under air temperature conditions, thereby causing pipeline blockage. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 A schematic diagram of a drilling rig air duct antifreeze device provided in one embodiment of the present application;

[0023] Figure 2 A schematic diagram of the structure of an alcohol antifreeze tank provided in one embodiment of the present application;

[0024] Figure 3 A schematic diagram of the structure of a defoaming plate provided in one embodiment of the present application;

[0025] Figure 4A schematic diagram of a drilling rig air duct antifreeze device provided in another embodiment of the present application;

[0026] Figure 5 A schematic diagram of the cross-section structure of a dryer provided in one embodiment of the present application;

[0027] Figure 6 A schematic diagram of a drilling rig air duct antifreeze device provided in yet another embodiment of the present application.

[0028] Description of reference numerals:

[0029] 1. Fan; 2. Alcohol antifreeze tank; 3. Drilling rig; 4. Dryer; 5. Alcohol replenishing tank; 6. Controller; 21. Air duct; 22. Orifice plate; 23. Defoaming plate; 24. Liquid level gauge; 41. Accommodating shell; 42. Insulation layer; 100. Three-way valve; 200. First valve; 201. Air inlet; 202. Air outlet; 231. Plate body; 232. Convex shell; 300. Second valve. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application is clearly and completely described below. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work also fall within the scope of protection of the present application.

[0031] like Figure 1 As shown, the present application provides a drilling rig air duct antifreeze device, comprising a fan 1, an alcohol antifreeze tank 2 and a drilling rig 3 connected in series in sequence;

[0032] A three-way valve 100 is provided between the fan 1 and the alcohol antifreeze tank 2;

[0033] A first valve 200 is provided between the alcohol antifreeze tank 2 and the drilling rig 3; the three-way valve 100 is also connected to the first valve 200 through a pipeline;

[0034] An air inlet 201 and an air outlet 202 are provided above the side wall of the alcohol antifreeze tank 2;

[0035] An air guide pipe 21 is provided in the alcohol antifreeze tank 2, one end of the air guide pipe 21 is connected to the air inlet 201, and the other end is close to the bottom of the alcohol antifreeze tank 2;

[0036] A multi-layer perforated plate 22 is horizontally arranged in the alcohol antifreeze tank 2 , and the air guide pipe 21 is arranged through the multi-layer perforated plate 22 .

[0037] In the present application, a check valve is also provided near the gas outlet 202 (the check valve is provided between the gas outlet 202 and the connection point between the three-way valve 100 and the first valve 200) to prevent gas backflow.

[0038] When in use, first switch the three-way valve 100 to the state of connecting the fan 1 and the alcohol antifreeze tank 2 and sealing the first valve 200, start the fan 1 to pressurize the outside air and then output it from the output end, the high-speed air output by the fan 1 enters from the air inlet 201 of the alcohol antifreeze tank 2, and is discharged through the lower end of the air guide pipe 21. The discharged air will cause the alcohol solution to tumble, and the alcohol antifreeze tank 2 is provided with a multi-layer orifice plate 22. The presence of these orifice plates 22 can reduce the tumbling of the alcohol solution, and can disperse the upward air so that the air can ascend smoothly, and can make the airflow fully contact with the alcohol solution. Since the compressed air output by the fan 1 contains a small amount of water vapor, after the water vapor is washed by the alcohol solution, the moisture in the airflow will be dissolved in the alcohol, and since alcohol is volatile, the airflow will be mixed with alcohol vapor when discharging the alcohol liquid.

[0039] The gas discharged from the outlet 202 of the alcohol antifreeze tank 2 enters the gas path of the drilling rig 3 after passing through the first valve 200. At this time, the gas is mixed with ethanol vapor and enters the pipeline after being output to prevent the pipeline from being blocked by ice, and the opening of the first valve 200 can also be controlled to adjust the size of the airflow.

[0040] When alcohol needs to be added to the alcohol antifreeze tank 2, the three-way valve 100 is controlled to switch to the state of connecting the fan 1 and the first valve 200 to block the alcohol antifreeze tank 2. At this time, alcohol is added to the alcohol antifreeze tank 2 to a suitable liquid level. After the liquid replenishment is completed, the three-way valve 100 can be switched to the state of connecting the fan 1 and the alcohol antifreeze tank 2 and the first valve 200. In this way, the fan 1 does not stop supplying air when the alcohol antifreeze tank 2 is replenished, thereby preventing the occurrence of shutdown during liquid replenishment.

[0041] The drilling rig air duct antifreeze device provided in the present application is provided with an alcohol antifreeze tank 2 on the air path pipeline supplied by the fan 1 to the drilling rig, and the compressed air supplied by the fan 1 is passed into the alcohol in the alcohol antifreeze tank 2 through the air guide pipe 21, and the alcohol is used to absorb the water vapor in the air flow. At the same time, the stabilizing effect of the multi-layer perforated plate 22 can prevent the alcohol solution from rolling over. The air flow after contacting with the alcohol can bring out a part of the alcohol vapor and mix it into the air flow. Since the freezing point of alcohol is low (-114°C) and it can be miscible with water in any proportion, the freezing point of the alcohol solution formed after the alcohol vapor enters the air flow and miscible with water is much lower than the freezing point of water, thereby preventing the water vapor in the air flow from condensing and freezing on the pipeline and blocking the pipeline, thereby overcoming the disadvantage that in the compressed air supply process of some drilling rigs, the compressed air contains water, which is easy to condense and freeze in the air path of the air duct under air temperature conditions, causing pipeline blockage. In addition, the device of the present application is also provided with a bypass connected in parallel with the alcohol antifreeze tank 2 (i.e., the three-way valve 100 is also connected to the pipeline of the first valve 200), which can be switched to the bypass when alcohol is added to the alcohol antifreeze tank 2 to ensure the normal operation of the drilling rig, thereby preventing the occurrence of shutdown during refilling.

[0042] like Figure 2 As shown, optionally, a defoaming plate 23 is also horizontally arranged in the upper inner portion of the alcohol antifreeze tank 2 , and the defoaming plate 23 is close to the lower edge of the air outlet 202 .

[0043] In the present application, the defoaming plate 23 is arranged near the lower edge of the air outlet 202 . In actual use, care should be taken to control the liquid level of alcohol below the defoaming plate 23 .

[0044] like Figure 3 As shown, optionally, the defoaming plate 23 includes a plate body 231 with a plurality of through holes, and a plurality of inverted cone-shaped convex shells 232 are provided on the upper surface of the plate body 231;

[0045] The convex shell 232 is connected to the through holes on the plate body 231 in a one-to-one correspondence, and an opening is provided at the top of the convex shell 232 .

[0046] In the present application, when air is discharged from the alcohol solution during use, a large number of bubbles will be aroused, and when the bubbles burst, droplets will splash out. These splashed alcohol droplets will mix into the airflow. Due to the high airflow velocity, a large number of alcohol droplets will mix into the airflow, which can easily lead to a large alcohol consumption, frequent rehydration, and waste of alcohol solution. Therefore, a defoaming plate 23 is provided at the lower edge of the air outlet 202. When the airflow mixed with alcohol droplets passes through the defoaming plate 23, due to the setting of the convex shell 232 provided on the defoaming plate 23, the airflow will gradually narrow the flow space due to the inverted cone setting when passing through the convex shell 232. Therefore, some of the alcohol droplets mixed in the airflow will contact the inner wall of the convex shell 232 and be separated, and then flow into the solution below from the inner wall of the convex shell 232. Moreover, due to the inverted cone structure of the convex shell 232, the airflow can also increase its flow rate when flowing through the convex shell 232.

[0047] like Figure 4 As shown, optionally, a dryer 4 is also provided on the pipeline between the three-way valve 100 and the first valve 200 .

[0048] In the present application, since the gas path is switched to a spare bypass when alcohol is added to the alcohol antifreeze tank 2, a dryer 4 is provided to dry the input airflow to prevent the pipe from freezing due to water vapor in the airflow.

[0049] like Figure 5 As shown, optionally, the dryer 4 includes a housing 41, and the housing 41 is wrapped with a thermal insulation layer 42;

[0050] The accommodating housing 41 is filled with desiccant.

[0051] In the present application, silica gel particles may be used as the desiccant, and the provision of the temperature insulating layer 42 can prevent the desiccant from freezing due to low temperature that absorbs water.

[0052] like Figure 6 As shown, optionally, the alcohol antifreeze tank 2 is also connected to the alcohol supplement tank 5 via a second valve 300;

[0053] A liquid level gauge 24 is also provided in the alcohol antifreeze tank 2 .

[0054] In the present application, the liquid level gauge 24 can monitor the liquid level of the alcohol in the alcohol antifreeze tank 2 in real time. When the alcohol in the alcohol antifreeze tank 2 evaporates due to use and causes the liquid level to drop, the liquid level gauge 24 in the alcohol antifreeze tank 2 monitors the liquid level in real time. When the liquid level gauge 24 detects that the liquid level drops to a preset low level, the operator controls the three-way valve 100 to switch to the state of connecting the fan 1 and the dryer 4 to block the alcohol antifreeze tank 2. At this time, the compressed air supplied by the fan 1 will be dried by the desiccant (the desiccant used in the present application is silica gel particles) in the dryer 4 and then transmitted to the drilling rig 3 through the first valve 200 for operation. Since a check valve is provided at the air outlet 202, the air flow can be prevented from blowing back into the alcohol antifreeze tank 2. After the three-way valve 100 switches the state, there is no more gas input in the alcohol antifreeze tank 2. At this time, the second valve 300 is opened to replenish the alcohol liquid in the alcohol replenishing tank 5 into the alcohol antifreeze tank 2 to a certain liquid level (the liquid level gauge 24 monitors the liquid level in real time). When the alcohol is replenished, the second valve 300 is closed, and the three-way valve 100 is controlled to switch its state, and the three-way valve 100 is switched to a state in which the fan 1 and the alcohol antifreeze tank 2 are connected and the dryer 4 is blocked, so that the fan 1 can supply air without stopping when the alcohol antifreeze tank 2 is replenished, thereby preventing the occurrence of shutdown during replenishment.

[0055] like Figure 6 As shown, optionally, the liquid level meter 24 , the three-way valve 100 , the first valve 200 , and the second valve 300 are all electrically connected to the controller 6 .

[0056] In the present application, a controller 6 is provided, and the above-mentioned devices are electrically connected to the controller 6. The status of the above-mentioned devices can be controlled in real time through the controller 6, which has the characteristics of real-time and high efficiency.

[0057] A drilling rig air duct antifreeze device, the use process of which is as follows:

[0058] When in use, the controller 6 controls the three-way valve 100 to switch to the state of connecting the fan 1 and the alcohol antifreeze tank 2 and blocking the dryer 4. The fan 1 is started to pressurize the outside air and then output it from the output end. The high-speed air output by the fan 1 enters from the air inlet 201 of the alcohol antifreeze tank 2 and is discharged through the lower end of the air guide pipe 21. The discharged air will cause the alcohol solution to tumble, and a multi-layer orifice plate 22 is arranged in the alcohol antifreeze tank 2. The presence of these orifice plates 22 can reduce the tumbling of the alcohol solution, and can disperse the upward air so that the air can ascend smoothly, and can make the airflow fully contact with the alcohol solution. Since the compressed air output by the fan 1 contains a small amount of water vapor, after the water vapor is washed by the alcohol solution, the moisture in the airflow will be dissolved in the alcohol, and since alcohol is volatile, the airflow will be mixed with alcohol vapor when it is discharged through the alcohol.

[0059] When these air are discharged from the alcohol solution, a large number of bubbles will be stirred up. When the bubbles burst, droplets will splash out. These splashed alcohol droplets will mix into the airflow. Due to the high airflow velocity, a large number of alcohol droplets will mix into the airflow, which can easily lead to a large alcohol consumption, frequent rehydration, and waste of alcohol solution. Therefore, a defoaming plate 23 is provided at the lower edge of the air outlet 202. When these airflows mixed with alcohol droplets pass through the defoaming plate 23, due to the setting of the convex shell 232 provided on the defoaming plate 23, the airflow will gradually narrow the flow space when passing through the convex shell 232 due to its inverted cone setting. Therefore, some of the alcohol droplets mixed in the airflow will contact the inner wall of the convex shell 232 and be separated, and then flow into the solution below from the inner wall of the convex shell 232. In addition, due to the inverted cone structure of the convex shell 232, the airflow can also increase its flow velocity when flowing through the convex shell 232.

[0060] The gas discharged from the outlet 202 of the alcohol antifreeze tank 2 enters the gas path of the drilling rig 3 after passing through the first valve 200. At this time, the gas is mixed with ethanol vapor and enters the pipeline after being output to prevent the pipeline from being frozen and blocked. The controller 6 can also control the opening of the first valve 200 to adjust the size of the airflow.

[0061] When the alcohol in the alcohol antifreeze tank 2 evaporates due to use and causes the liquid level to drop, the liquid level gauge 24 in the alcohol antifreeze tank 2 monitors the liquid level in real time and feeds back the data to the controller 6. When the liquid level gauge 24 detects that the liquid level drops to a preset low level, the controller 6 controls the three-way valve 100 to switch to a state of connecting the fan 1 and the dryer 4 to block the alcohol antifreeze tank 2. At this time, the compressed air supplied by the fan 1 will be dried by the desiccant (the desiccant used in this application is silica gel particles) in the dryer 4 and then transmitted to the drilling rig 3 through the first valve 200 for operation. Since a check valve is provided at the air outlet 202, the air flow can be prevented from blowing back into the alcohol antifreeze tank 2. After the three-way valve 100 switches the state, there is no more gas input into the alcohol antifreeze tank 2. At this time, the controller 6 controls the second valve 300 to open, and the alcohol liquid in the alcohol replenishing tank 5 is added to the alcohol antifreeze tank 2 to a certain liquid level (the liquid level gauge 24 monitors the liquid level in real time). When the alcohol is replenished, the controller 6 controls the second valve 300 to close, and then controls the three-way valve 100 to switch the state, and switches the three-way valve 100 to a state in which the fan 1 and the alcohol antifreeze tank 2 are connected and the dryer 4 is blocked, so that the fan 1 can supply air without stopping when replenishing the alcohol antifreeze tank 2, thereby preventing the occurrence of shutdown during replenishment.

[0062] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, ordinary technicians in the field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A drilling rig air duct antifreeze device, characterized in that: It comprises a fan (1), an alcohol antifreeze tank (2) and a drilling rig (3) which are sequentially connected in series; A three-way valve (100) is provided between the fan (1) and the alcohol antifreeze tank (2); A first valve (200) is provided between the alcohol antifreeze tank (2) and the drilling rig (3); the three-way valve (100) is also connected to the first valve (200) via a pipeline; An air inlet (201) and an air outlet (202) are provided above the side wall of the alcohol antifreeze tank (2); An air guide pipe (21) is provided in the alcohol antifreeze tank (2), one end of the air guide pipe (21) is connected to the air inlet (201), and the other end is close to the bottom of the alcohol antifreeze tank (2); Multiple layers of perforated plates (22) are horizontally arranged in the alcohol antifreeze tank (2), and the air guide pipe (21) is arranged through the multiple layers of perforated plates (22).

2. The drilling rig air duct antifreeze device according to claim 1, characterized in that: A defoaming plate (23) is also horizontally arranged at the upper inner portion of the alcohol antifreeze tank (2), and the defoaming plate (23) is close to the lower edge of the air outlet (202).

3. The drilling rig air duct antifreeze device according to claim 2, characterized in that: The defoaming plate (23) comprises a plate body (231) with a plurality of through holes, and a plurality of inverted cone-shaped convex shells (232) are arranged on the upper surface of the plate body (231); The convex shell (232) is connected to the through holes on the plate body (231) in a one-to-one correspondence, and an opening is provided at the top end of the convex shell (232).

4. The drilling rig air duct antifreeze device according to claim 1, characterized in that: A dryer (4) is also provided on the pipeline between the three-way valve (100) and the first valve (200).

5. The drilling rig air duct antifreeze device according to claim 4, characterized in that: The dryer (4) comprises a housing (41), and the housing (41) is wrapped with a temperature insulation layer (42); The accommodating shell (41) is filled with a desiccant.

6. The drilling rig air duct antifreeze device according to any one of claims 1 to 5, characterized in that: The alcohol antifreeze tank (2) is also connected to the alcohol supplement tank (5) via a second valve (300); A liquid level meter (24) is also provided in the alcohol antifreeze tank (2).

7. The drilling rig air duct antifreeze device according to claim 6, characterized in that: The liquid level meter (24), the three-way valve (100), the first valve (200), and the second valve (300) are all electrically connected to the controller (6).

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