A four-way control valve and an anchor drill

Abstract

The present application relates to the technical field of anchor rod drilling machine, especially to a four-way control valve and anchor rod drilling machine. The four-way control valve comprises a gas supply channel, a water supply channel, a communication pipe and a valve. The gas supply channel comprises an air inlet and an air outlet, and the water supply channel comprises a water inlet and a water outlet. The gas supply channel and the water supply channel are communicated through the communication pipe, and the valve is arranged on the communication pipe. In the working process of the anchor rod drilling machine, the gas supply channel can provide working gas for the anchor rod drilling machine, and the water supply channel can supply water in the drilling machine. By rotating the valve, part of the gas in the gas supply channel can be selectively introduced into the water supply channel. During the drilling construction process, dry drilling or wet drilling can be adjusted at any time according to the roof lithology, and the influence of changing the air supply and water supply is reduced. The pipeline disassembly and installation operation is avoided, the construction time is saved, the construction efficiency is improved, and the safety guarantee is improved.

Description

Technical Field

[0001] This invention relates to the field of anchor drilling rig technology, and in particular to a four-way control valve and an anchor drilling rig. Background Technology

[0002] In some mining areas, the strata are mostly mudstone. Mudstone has strong expansion when it comes into contact with cement. When constructing anchor bolts and anchor cables, the top plate encounters mudstone that blocks the drill rod. The drilling speed of the anchor bolt drilling machine is slow. Ordinary dry drill rods cannot meet the needs of rapid construction. It is necessary to switch to wet drilling during the construction process.

[0003] Under normal conditions, the conversion between dry drilling and wet drilling requires pipeline modification. This process increases the number of construction steps, prolongs the construction time, and reduces the efficiency of anchor bolt and anchor cable construction. In addition, incomplete pressure relief during pipeline modification can easily lead to safety accidents such as collapse injuries. Summary of the Invention

[0004] The primary objective of this invention is to provide a four-way control valve that addresses the inconvenience of switching between dry and wet drilling.

[0005] A second objective of this invention is to provide an anchor drilling rig that employs a four-way control valve as described above.

[0006] This invention provides a four-way control valve, which includes an air supply channel, a water supply channel, a connecting pipe, and a valve;

[0007] The air supply channel includes an air inlet and an exhaust outlet, and the water supply channel includes a water inlet and a drain outlet.

[0008] The gas supply channel and the water supply channel are connected by a connecting pipe, and a valve is installed on the connecting pipe.

[0009] Preferably, the axis of the gas supply channel and the axis of the water supply channel are arranged parallel to each other;

[0010] The connecting pipe is installed between the gas supply channel and the water supply channel, and the axis of the connecting pipe is perpendicular to the gas supply channel and the water supply channel.

[0011] Preferably, the vent, inlet, and outlet are all threaded holes.

[0012] Preferably, the valve is a ball valve.

[0013] Preferably, the diameter of the gas supply channel is larger than the diameter of the water supply channel.

[0014] An anchor drilling rig includes a four-way control valve as described above.

[0015] Preferably, the anchor drilling rig is a pneumatic drilling rig, which includes a pneumatic motor, a hollow anchor bolt, and a liquid injector;

[0016] The hollow anchor rod is connected to the power output end of the pneumatic motor, the inlet end of the injector is connected to the drain outlet, and the outlet end of the injector is connected to the internal cavity of the hollow anchor rod.

[0017] The exhaust port is connected to the inlet end of the pneumatic motor.

[0018] Preferably, it also includes an air supply system, which is connected to the air inlet.

[0019] Preferably, it also includes a water supply system, which is connected to the water inlet.

[0020] Intentional effect:

[0021] During the operation of the anchor bolt drilling rig, the air supply channel provides working gas, and the water supply channel supplies water to the rig. A rotary valve allows for selective diversion of some gas from the air supply channel into the water supply channel. This enables adjustments to dry or wet drilling methods as the roof lithology changes during drilling, minimizing the impact of switching between air and water supplies. It also eliminates the need for pipeline disassembly and installation, saving construction time, improving efficiency, and enhancing safety. Attached Figure Description

[0022] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the structure of a four-way control valve provided for a specific embodiment of the present invention.

[0024] Explanation of reference numerals in the attached figures:

[0025] 1: Gas supply channel; 2: Water supply channel; 3: Connecting pipe; 4: Valve. Detailed Implementation

[0026] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0028] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified. Furthermore, the terms "installed," "connected," and "linked" should be interpreted broadly; for example, they may refer to a fixed connection, a detachable connection, or an integral connection; they may refer to a mechanical connection or an electrical connection; they may refer to a direct connection or an indirect connection through an intermediate medium; and they may refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0029] like Figure 1 As shown, this embodiment provides a four-way control valve, which includes an air supply channel 1, a water supply channel 2, a connecting pipe 3, and a valve 4.

[0030] The gas supply channel 1 includes an air inlet and an exhaust outlet, and the water supply channel 2 includes a water inlet and an exhaust outlet.

[0031] Gas supply channel 1 and water supply channel 2 are connected by a connecting pipe 3, and a valve 5 is installed on the connecting pipe 4.

[0032] During the operation of the anchor bolt drilling rig, air supply channel 1 provides working gas, and water supply channel 2 supplies water to the rig. By rotating valve 4, a portion of the gas from air supply channel 1 can be selectively introduced into water supply channel 2. This allows for adjustments to dry or wet drilling methods as the roof lithology changes during drilling, minimizing the impact of switching between air and water supplies. It also avoids pipeline disassembly and installation, saving construction time, improving efficiency, and enhancing safety.

[0033] In addition to switching between dry and wet drilling, adjusting the airflow of the valve can achieve wet drilling, which not only avoids the construction of a large number of cemented tunnels, but also achieves the goal of dust reduction.

[0034] Specifically, the axis of the gas supply channel 1 and the axis of the water supply channel 2 are set parallel to each other, and the connecting pipe 3 is set between the gas supply channel 1 and the water supply channel 2, and the axis of the connecting pipe 3 is perpendicular to the gas supply channel 1 and the water supply channel 2.

[0035] The exhaust port, water inlet, and drain are all threaded holes. These threaded holes allow for easy connection to gas or water supply pipes.

[0036] Valve 4 is a ball valve. The diameter of the air supply channel 1 is larger than that of the water supply channel. This arrangement prevents the air pressure in the air supply channel 1 from being affected when the air supply channel 1 supplies air to the water supply channel.

[0037] In this embodiment, an anchor drilling rig is also provided, which includes the four-way control valve as described above.

[0038] The anchor drilling rig is a pneumatic drilling rig, which includes a pneumatic motor, a hollow anchor bolt, and a liquid injector. The hollow anchor bolt is connected to the power output end of the pneumatic motor, the inlet end of the liquid injector is connected to the drain outlet, the outlet end of the liquid injector is connected to the internal cavity of the hollow anchor bolt, and the exhaust port is connected to the inlet end of the pneumatic motor.

[0039] The anchor drilling rig also includes an air supply system and a water supply system, with the air supply system connected to the air inlet.

[0040] It should be noted that the drill rod drilling rig in this embodiment is the same as the existing drill rod drilling rig. The main difference is that the existing injector performs wet drilling when connected to the water supply system, while the injector performs dry drilling when connected to the air supply system.

[0041] In this embodiment, thanks to the four-way valve, valve 4 on the connecting pipe 3 is closed during wet drilling. Gas supplied by the gas supply system enters the pneumatic motor through gas supply channel 1, and water supplied by the water supply system enters the injector through water supply channel 2. The water in the injector then enters the internal space of the drill pipe. During dry drilling, valve 4 on the connecting pipe 3 is opened, and the water supply system is shut off. Gas supplied by the gas supply system enters the pneumatic motor through gas supply channel 1. A portion of the gas entering gas supply channel 1 flows through connecting pipe 3 into water supply channel 2. The gas entering water supply channel 2 ultimately enters the internal space of the drill pipe after passing through the injector, providing purging air for the dry drilling process and preventing drill cuttings from clogging the internal space of the drill pipe.

[0042] By controlling the aforementioned valves, switching between dry and wet drilling can be achieved. Furthermore, adjusting the airflow at valve 4 enables damp drilling, which not only avoids extensive construction of cemented tunnels but also achieves dust control. For example, if the water supply system valve is partially open and the connecting pipe 3 valve 4 is partially open, then a gas-liquid mixture will enter the drill rod via the injector. Based on the moisture content at the construction site, controlling the water supply system valves and the connecting pipe 3 valve 4 can prevent extensive construction of cemented tunnels and achieve dust control.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions 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 invention.

Claims

1. A method of using a four-way control valve, characterized in that, A four-way control valve includes an air supply channel, a water supply channel, a connecting pipe, and a valve. The air supply channel includes an air inlet and an exhaust outlet, and the water supply channel includes a water inlet and a drain outlet. The gas supply channel and the water supply channel are connected by a connecting pipe, and a valve is installed on the connecting pipe; The gas supply channel can provide working gas for the anchor drilling rig, and the water supply channel can supply water to the anchor drilling rig. By rotating the valve, some of the gas in the gas supply channel can be selectively introduced into the water supply channel. The axis of the gas supply channel is set parallel to the axis of the water supply channel; The connecting pipe is installed between the gas supply channel and the water supply channel, and the axis of the connecting pipe is perpendicular to the gas supply channel and the water supply channel. The diameter of the gas supply channel is larger than that of the water supply channel; During the drilling process, the dry or wet drilling method should be adjusted as needed according to changes in the lithology of the roof. With the four-way control valve in place, during wet drilling, the valve on the connecting pipe is closed. The gas supplied by the gas supply system enters the pneumatic motor through the gas supply channel, and the water supplied by the water supply system enters the injector through the water supply channel. The water in the injector enters the internal space of the drill pipe. During dry drilling, the valve on the connecting pipe is opened and the water supply system is shut off. The gas supplied by the gas supply system enters the pneumatic motor through the gas supply channel. Part of the gas entering the gas supply channel enters the water supply channel through the connecting pipe. The gas entering the water supply channel finally enters the internal space of the drill rod through the injector to provide purging air for the dry drilling process and prevent drill cuttings from clogging the internal space of the drill rod. By controlling the valves mentioned above, it is possible to switch between dry drilling and wet drilling. By adjusting the airflow of the valves, wet drilling can be achieved.

2. The method of using the four-way control valve according to claim 1, characterized in that, The air inlet, exhaust outlet, water inlet, and drain outlet are all threaded holes.

3. The method of using the four-way control valve according to claim 1, characterized in that, The valve is a ball valve.

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