Pressure control system for gas storage tank of drilling machine

Abstract

The utility model relates to a pressure control system for an air storage tank of a drilling machine. The pressure control system comprises an air compressor, the air storage tank and a main pipe, the air compressor is used for compressing gas media, the gas storage tank is used for storing the gas media, and the main pipe is connected with the output end of the air compressor and the input end of the gas storage tank. The system further comprises a pressure regulating pipeline and a pressure control pipeline, and the pressure regulating pipeline comprises a minimum pressure valve and is used for outputting gas to the output end; the pressure value of the output gas is not less than the opening pressure of the minimum pressure valve; the pressure control pipeline is used for adjusting the opening pressure of the minimum pressure valve; the input end of the pressure regulating pipeline and the input end of the pressure control pipeline are both connected with the output end of the gas storage tank. According to the utility model, the opening pressure of the minimum pressure valve is adjusted by arranging the pressure control pipeline, so that the gas pressure in the gas storage tank in the pressure adjusting pipeline is output to the output end after reaching different opening pressures of the minimum pressure valve.

Description

Technical Field

[0001] The utility model relates to the technical field of pressure control of drilling rig air compressors, in particular to a pressure control system for a drilling rig air storage tank. Background Art

[0002] During the actual operation of the drilling rig, the drill rod needs to be replaced with different drill bits, and the gas pressure required for the drill bit operation is also different. The existing technology generally determines the minimum output pressure of the gas through a minimum pressure valve, but the opening pressure of the currently designed minimum pressure valve is fixed, which is not suitable for the gas pressure requirements of different drill bits on the drill rod, and is easy to cause energy waste. The gas pressure required when the drilling rig uses a down-the-hole drill bit to drill is high. When the drilling rig uses a scraper drill bit to drill, the gas pressure required is low. If the opening pressure value of the minimum pressure valve is too high, it will cause unnecessary energy waste when using the scraper drill.

[0003] Application number: 202310693616.0, application date: 2023.06.12, the name of the invention patent is pressure control method and drilling rig control method, the pressure control method is used to adjust the pressure value of a pneumatic system, the pneumatic system includes: air compressor, air storage tank, air intake valve, exhaust valve, flow sensor, pressure sensor, console and controller. The pressure control method includes: the controller obtains the pressure value collected by the pressure sensor; the controller determines whether the pressure value collected by the pressure sensor is greater than the set pressure threshold, if so, sends a pressure reduction control instruction to at least one of the air compressor, the air intake valve and the exhaust valve; at least one of the air compressor, the air intake valve and the exhaust valve performs a pressure reduction action according to the pressure reduction control instruction. The benefit of this application is that it provides a pressure control method for improving the pressure value of a pneumatic system and a drilling rig control method.

[0004] The above-mentioned prior art is capable of adjusting the air pressure entering the power head, but the pressure control method is to detect through a pressure sensor whether the collected pressure value is greater than the set pressure threshold. If so, at least one of the air compressor, the intake valve and the exhaust valve will reduce the pressure. The intake valve is used for the air compressor, and the exhaust valve is used for the gas tank. Therefore, the above-mentioned prior art is to achieve pressure control by adjusting the input gas pressure value of the input end (air compressor) or adjusting the output pressure of the output end (gas tank). The exhaust valve is used to increase the exhaust volume discharged from the gas tank, and it must be used in conjunction with a pressure sensor. The pressure sensor is used to detect the pressure of the gas medium in the gas tank to avoid excessive exhaust. At the same time, exhausting the gas through the exhaust valve to reduce the pressure will also cause unnecessary energy waste. Utility Model Content

[0005] The prior art is to increase the exhaust volume of the gas tank by an exhaust valve to achieve the change of gas output pressure, which not only causes unnecessary waste of resources, but also the gas tank must be used in conjunction with a pressure sensor to avoid excessive exhaust. The purpose of the utility model is to provide a pressure control system for a drilling rig gas tank.

[0006] The technical solution provided by the utility model is:

[0007] A pressure control system for a drilling rig gas storage tank, comprising:

[0008] Air compressor, which is used to compress gaseous media;

[0009] Gas storage tank, which is used to store gas medium;

[0010] A main pipe connected to the output end of the air compressor and the input end of the air storage tank;

[0011] It is characterized by further comprising:

[0012] A pressure regulating pipeline, the pressure regulating pipeline comprising a minimum pressure valve, the pressure regulating pipeline is used to output gas to the output end; the pressure value of the output gas is not less than the opening pressure of the minimum pressure valve;

[0013] A pressure control pipeline, which is used to adjust the opening pressure of the minimum pressure valve;

[0014] Wherein, the input ends of the pressure regulating pipeline and the pressure control pipeline are both connected to the output end of the gas storage tank.

[0015] Furthermore, the pressure regulating pipeline also includes a first branch pipe, and the first branch pipe is connected to the output end of the gas storage tank and the input end of the minimum pressure valve.

[0016] Furthermore, the pressure control pipeline includes a second branch pipe, and the second branch pipe is provided with an opening and closing device for controlling the on-off of the pressure control pipeline, and is also provided with a pressure regulating device for adjusting the gas pressure in the second branch pipe.

[0017] Furthermore, the first end of the second branch pipe is connected to the output end of the gas storage tank, and is connected in series with the pressure regulating device and the opening and closing device in sequence, and the terminal end is connected to the spring chamber of the minimum pressure valve.

[0018] Furthermore, the opening and closing device is a solenoid valve, and the pressure regulating device is a pressure reducing valve.

[0019] Furthermore, a throttle is connected between the solenoid valve and the input end of the minimum pressure valve through a third branch pipe; when the pressure control pipeline is disconnected, the pressure in the spring chamber of the minimum pressure valve is unloaded through the throttle.

[0020] Furthermore, when the pressure control pipeline is connected, the opening pressure of the minimum pressure valve is substantially the sum of the output gas pressure setting values ​​of the pressure reducing valve and the minimum pressure valve.

[0021] Furthermore, when the pressure control pipeline is disconnected, the opening pressure of the minimum pressure valve is equal to the set value of its output gas pressure.

[0022] Furthermore, the pressure control pipeline also includes a pressure sensor for detecting the pressure value of the gas in the second branch pipe after passing through the pressure reducing valve.

[0023] Furthermore, the solenoid valve is a two-position, two-way solenoid valve; when the two-position, two-way solenoid valve is powered on, gas is allowed to pass through; when the two-position, two-way solenoid valve is powered off, gas is prevented from passing through.

[0024] Compared with the prior art, the technical solution provided by the utility model has the following beneficial effects:

[0025] The utility model adjusts the opening pressure of the minimum pressure valve by setting a pressure control pipeline, so that the gas pressure in the gas storage tank in the pressure regulating pipeline reaches the different opening pressures of the minimum pressure valve, and then outputs to the output end, and finally realizes outputting gas of different pressures to the rotary head of the drilling rig.

[0026] In addition, in order to ensure that the gas pressure output from the output end meets the set pressure value, a pressure sensor is also provided on the pressure control pipeline to detect whether the gas pressure meets the pressure setting value of the pressure regulating device after the gas passes through the pressure regulating device on the pressure control pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the pressure control architecture of the drilling rig pneumatic system in the prior art;

[0028] Figure 2 This is a schematic diagram of the overall architecture of a pressure control system in one embodiment of the present application;

[0029] Explanation of the symbols in the schematic diagram:

[0030] Air compressor 1; air storage tank 2, first branch pipe 21, second branch pipe 22, third branch pipe 23; minimum pressure valve 3; pressure reducing valve 4; solenoid valve 5; throttling 6; pressure sensor 7. DETAILED DESCRIPTION

[0031] In order to further understand the content of the utility model, the utility model is described in detail in conjunction with the drawings and embodiments.

[0032] The structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no substantial technical significance. Any modification of the structure, change of the proportion relationship or adjustment of the size, without affecting the effects and purposes that can be achieved by the present invention, should still fall within the scope of the technical content disclosed by the present utility model. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and so on quoted in this specification are only for the convenience of description, and are not used to limit the scope of implementation. The change or adjustment of their relative relationship should also be regarded as the scope of implementation of the present invention without substantially changing the technical content.

[0033] When a down-the-hole drill is working underground, the drill needs to replace different drill bits to adapt to different work requirements, such as down-the-hole drill bits, scraper drill bits, etc. However, the gas pressure required to pass into the drill bits is actually different for different drill bits. The gas pressure required for down-the-hole drill bits is high, while the gas pressure required for scraper drill bits is low. At present, the gas pressure at the output end of the existing technology cannot be adjusted and is a fixed value. In order to ensure that the operation of the drill is not affected when different drill bits are replaced, the gas pressure generally needs to be set to a high value.

[0034] The present application discloses a pressure control system for a drilling rig gas tank, comprising an air compressor 1, a gas tank 2 and a main pipe. The air compressor 1 is used to compress a gas medium, the gas tank 2 is used to store the gas medium, and the main pipe connects the output end of the air compressor 1 to the input end of the gas tank 2.

[0035] The pressure control system mainly includes two pipelines, namely the pressure regulating pipeline and the pressure control pipeline. The pressure regulating pipeline includes a minimum pressure valve 3. When the gas pressure value in the pressure regulating pipeline is greater than the opening pressure of the minimum pressure valve 3, the minimum pressure valve 3 opens, the pressure regulating pipeline is connected to the output end, and the gas is output from the pressure regulating pipeline to the output end.

[0036] The pressure control pipeline is used to adjust the opening pressure of the minimum pressure valve 3. The input ends of the pressure control pipeline and the pressure regulating pipeline are both connected to the output end of the gas storage tank 2.

[0037] More specifically, the pressure regulating pipeline further includes a first branch pipe 21, and the output end of the gas storage tank 2 and the input end of the minimum pressure valve 3 are connected through the first branch pipe 21. When the gas pressure in the first branch pipe 21 is greater than the opening pressure of the minimum pressure valve 3, the pressure regulating pipeline is connected to the output end, and the pressure regulating pipeline delivers gas with a certain pressure to the rotary head of the drilling rig.

[0038] The pressure control pipeline also includes a second branch pipe 22, on which an opening and closing device for controlling the on and off of the pressure control pipeline is provided, and a pressure regulating device for adjusting the gas pressure in the second branch pipe 22 is provided. The opening and closing device is preferably a solenoid valve 5, and the pressure regulating device is preferably a pressure reducing valve 4. The solenoid valve 5 is preferably a two-position two-way solenoid valve. When the two-position two-way solenoid valve loses power, the pressure control pipeline is connected to allow gas to pass through. When the two-position two-way solenoid valve is energized, the pressure control pipeline is disconnected to prevent gas from passing through.

[0039] The first end of the second branch pipe 22 is connected to the output end of the gas storage tank 2, and after being connected in series with the pressure regulating device and the opening and closing device in sequence, the terminal end of the second branch pipe 22 is connected to the spring chamber of the minimum pressure valve 3. A throttle 6 is connected between the solenoid valve 5 and the input end of the minimum pressure valve 3 through the third branch pipe 23. When the pressure control pipeline controlled by the solenoid valve 5 is disconnected, the gas pressure in the pipeline connecting the solenoid valve 5 and the input end of the minimum pressure valve 3 is unloaded by the throttle 6. After unloading, the spring chamber of the minimum pressure valve 3 returns to its original position, and the gas pressure of opening the minimum pressure valve 3 is the output gas pressure setting value of the minimum pressure valve 3.

[0040] Correspondingly, when the solenoid valve 5 of the pressure control pipeline controls the pressure control pipeline to be connected, the gas pressure in the second branch pipe 22 decreases after passing through the pressure reducing valve 4, and finally acts on the spring chamber of the minimum pressure valve 3, so that if the gas in the first branch pipe 21 of the pressure regulating pipeline wants to open the minimum pressure valve 3, a larger gas pressure is required. At this time, the opening pressure of the minimum pressure valve 3 is roughly the sum of the output gas pressure setting value of the pressure reducing valve 4 and the output gas pressure setting value of the minimum pressure valve 3.

[0041] A pressure measuring point 7 is also provided on the pressure control pipeline. The pressure measuring point 7 can be connected to a pressure measuring instrument. The pressure measuring point 7 is connected to the output end of the pressure reducing valve 4 and is used in conjunction with the pressure measuring instrument to detect the gas pressure value of the gas in the second branch pipe 22 after passing through the pressure reducing valve 4. If the gas pressure value detected by the pressure measuring instrument does not match the output gas pressure value of the pressure reducing valve 4, it is necessary to readjust the pressure reducing valve 4 or repair the pressure reducing valve 4.

[0042] The pressure measuring instrument may be a pressure sensor or a pressure gauge, but is not limited to a pressure sensor or a pressure gauge. Any component that can detect the gas pressure at the output end of the pressure reducing valve 4 may be used.

[0043] The output gas pressure setting values ​​of the pressure reducing valve 4 and the minimum pressure valve 3 can be set in advance, and the setting values ​​can be adjusted according to the operation requirements.

[0044] The present application adjusts the opening pressure of the minimum pressure valve 3 through the pressure control pipeline, thereby changing the gas pressure in the gas storage tank 2, thereby achieving adjustable gas pressure at the output end. The gas storage tank 2 does not need to discharge gas to the outside by setting a gas release valve, thereby achieving reasonable utilization of resources and not causing unnecessary waste of resources.

[0045] The above schematically describes the present invention and its implementation methods, which are not restrictive. The drawings show only one implementation method of the present invention, and the actual structure is not limited thereto. Therefore, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the present invention, they should all fall within the protection scope of the present invention.

Claims

1. A pressure control system for a drilling rig gas tank, comprising: An air compressor (1), the air compressor (1) is used to compress a gas medium; A gas storage tank (2), the gas storage tank (2) is used to store gaseous medium; A main pipe connected to the output end of the air compressor (1) and the input end of the air storage tank (2); It is characterized by further comprising: A pressure regulating pipeline, the pressure regulating pipeline comprising a minimum pressure valve (3), the pressure regulating pipeline being used to output gas to an output end; the pressure value of the output gas is not less than the opening pressure of the minimum pressure valve (3); A pressure control pipeline, which is used to adjust the opening pressure of the minimum pressure valve (3); The input ends of the pressure regulating pipeline and the pressure control pipeline are both connected to the output end of the gas storage tank (2).

2. A pressure control system for a drilling rig gas tank according to claim 1, characterized in that: The pressure regulating pipeline further comprises a first branch pipe (21), wherein the first branch pipe (21) is connected to the output end of the gas storage tank (2) and the input end of the minimum pressure valve (3).

3. A pressure control system for a drilling rig gas tank according to claim 1, characterized in that: The pressure control pipeline comprises a second branch pipe (22), on which an opening and closing device for controlling the on and off of the pressure control pipeline is provided, and a pressure regulating device for adjusting the gas pressure in the second branch pipe (22) is also provided.

4. A pressure control system for a drilling rig gas tank according to claim 3, characterized in that: The first end of the second branch pipe (22) is connected to the output end of the gas storage tank (2), and is connected in series with the pressure regulating device and the opening and closing device in sequence, and the terminal end is connected to the spring chamber of the minimum pressure valve (3).

5. The pressure control system for a drilling rig gas tank according to claim 3, characterized in that: The opening and closing device is a solenoid valve (5), and the pressure regulating device is a pressure reducing valve (4).

6. A pressure control system for a drilling rig gas tank according to claim 5, characterized in that: A throttle (6) is connected between the solenoid valve (5) and the input end of the minimum pressure valve (3) via a third branch pipe (23); when the pressure control pipeline is disconnected, the pressure in the spring chamber of the minimum pressure valve (3) is unloaded via the throttle (6).

7. A pressure control system for a drilling rig gas tank according to claim 4, characterized in that: When the pressure control pipeline is connected, the opening pressure of the minimum pressure valve (3) is approximately the sum of the output gas pressure setting values ​​of the pressure reducing valve (4) and the minimum pressure valve (3).

8. The pressure control system for a drilling rig gas tank according to claim 1, characterized in that: When the pressure control pipeline is disconnected, the opening pressure of the minimum pressure valve (3) is equal to the set value of its output gas pressure.

9. The pressure control system for a drilling rig gas tank according to claim 3, characterized in that: The pressure control pipeline further comprises a pressure measuring point (7), which is connected to a pressure measuring instrument and is used to detect the pressure value of the gas in the second branch pipe (22) after passing through the pressure reducing valve (4).

10. The pressure control system for a drilling rig gas tank according to claim 5, characterized in that: The solenoid valve (5) is a two-position, two-way solenoid valve; when the two-position, two-way solenoid valve loses power, the pressure control pipeline is connected; when the two-position, two-way solenoid valve is powered on, the pressure control pipeline is disconnected.

Images