A gas pressure-maintaining system for a double-wheel mixing drill

Abstract

The present invention specifically relates to an air pressure maintaining system for a twin-wheel mixing drill; the system is characterized in that it comprises a monitoring device arranged inside a milling head, the head of the monitoring device is connected to an air compression station via an air pipe, and the tail is connected to the milling head; a float is provided inside the monitoring device, and the float divides the interior of the monitoring device into an upper half and a lower half; compressed air is input to the upper half of the monitoring device via the air pipe, and the oil in the milling head enters the lower half of the monitoring device, and the compressed air in the upper half is isolated from the oil in the lower half by the float in the monitoring device; the pressure of the oil in the lower half of the monitoring device and the milling head of the twin-wheel mixing drill is indirectly adjusted by adjusting the value of the compressed air output by the air compression station; when the twin-wheel mixing drill enters underground and is located in mud, the compressed air output by the air compression station is adjusted by pressure feedback, and the pressure between the oil in the twin-wheel mixing drill and the mud outside the twin-wheel mixing drill is adjusted by the monitoring device.

Description

Technical Field

[0001] The invention relates to the field of engineering machinery, in particular to an air pressure maintaining system for a double-wheel mixing drill. Background Art

[0002] For a twin-wheel mixing drill, the working environment is often harsh. For example, on the outside of the twin-wheel mixing drill, there is a mud mixture, while on the inside of the twin-wheel mixing drill is a precision gearbox and a hydraulic motor. Since the milling wheel of the twin-wheel mixing drill is constantly rotating during operation, it is impossible to set a fixed sealing structure, so a dynamic sealing structure is born between the inside and outside of the twin-wheel mixing drill. In order to ensure the reliability of the movable sealing structure, an oil injection is usually set on the inside of the twin-wheel mixing drill to balance the pressure between the inside and outside of the twin-wheel mixing drill. In this way, it is ensured that the mud mixture on the outside of the twin-wheel mixing drill will not enter the inside of the twin-wheel mixing drill and damage the gearbox and hydraulic system.

[0003] However, with the increasing drilling depth of the double-wheel mixing drill and the increasingly complex geological conditions, the current double-wheel mixing drill has put forward higher requirements for the milling head sealing device. The original pressure balance and pressure maintenance system on both sides is not very reliable. At the same time, with the development of modern construction level, for the traditional method of using hydraulic oil as the key medium for pressure balance, it takes a long time to pump the hydraulic oil from the ground to the double-wheel mixing drill deep underground. In other words, the current method of using hydraulic oil to achieve pressure balance has many problems such as unreliable pressure maintenance, untimely pressure maintenance feedback, and inconvenient maintenance. Summary of the invention

[0004] The purpose of the present invention is to overcome the above-mentioned defects and provide an air pressure maintaining system which can quickly establish a pressure maintaining system and whose pressure value can be adjusted in real time and monitor the oil state inside the milling head of a double-wheel mixing drilling rig in real time.

[0005] In order to achieve the above object, the present invention is achieved in the following ways:

[0006] A gas pressure-maintaining system for a twin-wheel mixing drill comprises an air compression station and a monitoring device arranged inside a milling head of the twin-wheel mixing drill. The head of the monitoring device is connected to the air compression station through an air pipe, and the tail of the monitoring device is connected to the milling head of the twin-wheel mixing drill. A float is arranged inside the monitoring device, and the float divides the inside of the monitoring device into an upper half and a lower half. Thus, the air compression station inputs compressed air to the upper half of the monitoring device through the air pipe, and since the lower half of the monitoring device is connected to the milling head of the twin-wheel mixing drill, the oil in the milling head enters the lower half of the monitoring device, and the compressed air in the upper half is isolated from the oil in the lower half by the float in the monitoring device. By adjusting the value of the compressed air output by the air compression station, the pressure of the oil in the lower half of the monitoring device and the milling head of the twin-wheel mixing drill is indirectly adjusted, and then when the twin-wheel mixing drill enters the underground and is located in the mud, the compressed air output by the air compression station is adjusted by pressure feedback, and the pressure between the oil in the twin-wheel mixing drill and the mud outside the twin-wheel mixing drill is adjusted by the monitoring device.

[0007] The method for judging the working condition of the double-wheel mixing drilling rig by the air pressure maintaining system includes:

[0008] Step 1: install a moisture sensor inside the milling head of the double-wheel mixing drill and connect the moisture sensor, the monitoring device and the compressed air pressure value sensor of the air compressor to the host control computer;

[0009] Step 2: The various values ​​fed back to the host control computer through the monitoring device and the above sensors are calculated by the controller algorithm to establish the pressure balance inside and outside the milling head;

[0010] Step 3: Use the moisture sensor to measure the moisture content in the oil in the milling head in real time, and combine it with the float position and compressed air value fed back by the monitoring device to determine whether the oil in the washing head is leaking or ineffective.

[0011] The air pressure-maintaining system adopts the above-mentioned structural design, and a monitoring device is arranged outside the milling head, so that it is connected to the oil inside the milling head and isolated from the external compressed air. In this way, the purpose of controlling the pressure balance between the inside and outside of the milling head can be achieved in real time according to the demand through the monitoring device. At the same time, through the cooperation of the monitoring device with the moisture sensor and other sensors inside the milling head, it is easy and quick to judge whether the sealing structure of the milling head and the state of the oil inside it are normal; at the same time, it is also easy and quick to adjust the pressure balance between the inside and outside of the milling head by adjusting the compressed air data. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the layout of the gas pressure maintenance system.

[0013] Figure 2It is a structural schematic diagram of a traveling chassis with an air compression station and an air compression station. DETAILED DESCRIPTION

[0014] The present invention is further described below by means of specific examples.

[0015] like Figure 1 , Figure 2 As shown, an air pressure maintaining system for a double-wheel mixing drill comprises an air compression station 1 and a monitoring device 3 arranged inside a milling head 2 of the double-wheel mixing drill. The head of the monitoring device 3 is connected to the air compression station 1 through an air pipe, and the tail of the monitoring device 3 is connected to the milling head of the double-wheel mixing drill 2. A float 4 is arranged in the monitoring device 3, and the float 4 divides the interior of the monitoring device 3 into an upper half and a lower half. In this way, the air compression station 1 inputs compressed air to the upper half of the monitoring device 3 through the air pipe, and because the lower half of the monitoring device 3 is connected to the double-wheel mixing drill 2, the upper half of the monitoring device 3 is connected to the lower half of the double-wheel mixing drill 2. The milling head 2 of the double-wheel mixing drill is connected, so that the oil in the milling head 2 enters the lower half of the monitoring device 3, and the compressed air in the upper half is isolated from the oil in the lower half by the float 4 in the monitoring device 3; by adjusting the compressed air value output by the air compression station 1, the pressure of the oil in the lower half of the monitoring device 3 and the milling head 2 of the double-wheel mixing drill is indirectly adjusted, and then when the double-wheel mixing drill enters the underground and is located in the mud, the compressed air output by the air compression station 1 is adjusted by pressure feedback and the pressure between the oil in the double-wheel mixing drill and the mud outside it is adjusted by the monitoring device 3.

[0016] The method for judging the working condition of the double-wheel mixing drilling rig by the air pressure maintaining system includes:

[0017] Step 1, a moisture sensor is arranged inside the milling head 2 of the double-wheel mixing drill, and the moisture sensor, the monitoring device 3 and the compressed air pressure value sensor of the air compressor are connected to the host control computer;

[0018] Step 2: The monitoring device 3 and the above sensors feed back various values ​​in the host control computer, and the controller algorithm calculates and establishes the pressure balance inside and outside the milling head 2;

[0019] Step 3: Use the moisture sensor to measure the moisture content in the oil in the milling head in real time and combine it with the float position and compressed air value fed back by the monitoring device 3 to determine whether the oil in the head is leaking or ineffective.

[0020] The air pressure-maintaining system adopts the above-mentioned structural design, and a monitoring device is arranged outside the milling head, so that it is connected to the oil inside the milling head and isolated from the external compressed air. In this way, the purpose of controlling the pressure balance between the inside and outside of the milling head can be achieved in real time according to the demand through the monitoring device. At the same time, through the cooperation of the monitoring device with the moisture sensor and other sensors inside the milling head, it is easy and quick to judge whether the sealing structure of the milling head and the state of the oil inside it are normal; at the same time, it is also easy and quick to adjust the pressure balance between the inside and outside of the milling head by adjusting the compressed air data.

Claims

1. An air pressure maintaining system for a double-wheel mixing drill, characterized by: The invention comprises a monitoring device arranged inside the milling head of a twin-wheel mixing drill, wherein the head of the monitoring device is connected to an air compression station through an air pipe, and the tail of the monitoring device is connected to the milling head. A float is arranged inside the monitoring device, and the float divides the inside of the monitoring device into an upper half and a lower half. Thus, the air compression station inputs compressed air to the upper half of the monitoring device through the air pipe, and since the lower half of the monitoring device is connected to the milling head of the twin-wheel mixing drill, the oil in the milling head enters the lower half of the monitoring device, and the compressed air in the upper half is isolated from the oil in the lower half by the float in the monitoring device. By adjusting the value of the compressed air output by the air compression station, the pressure of the oil in the lower half of the monitoring device and the milling head of the double-wheel mixing drill is indirectly adjusted. Then, when the double-wheel mixing drill enters the underground and is located in the mud, the compressed air output by the air compression station is adjusted through pressure feedback, and the pressure between the oil in the double-wheel mixing drill and the mud outside it is adjusted through the monitoring device.

2. A method for judging the working condition of a double-wheel mixing drill using the air pressure maintaining system according to claim 1, characterized in that: The method comprises the following steps: 1, setting a moisture sensor inside the milling head of the double-wheel mixing drill and connecting the moisture sensor, a monitoring device and a compressed air pressure value sensor of an air compressor to a host control computer; 2, feeding back various values ​​in the host control computer through the monitoring device and the above sensors, and establishing a pressure balance inside and outside the milling head through a controller algorithm calculation; and 3, determining whether the oil in the milling head is leaking or failing by measuring the moisture content in the oil in the milling head in real time through the moisture sensor and combining the float position fed back by the monitoring device and the value of compressed air.

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