Gas slitting device with plugging function

Abstract

The present application relates to the technical field of slotted pipe, and particularly relates to a gas slotted pipe with a plugging function, a jet nozzle is externally provided with a plugging protection mechanism, an outer protective sleeve is externally slidably installed with an inner protective sleeve through a sliding block and a sliding groove, one end of the inner protective sleeve is mutually attracted through a first magnetic suction block to tightly connect a connecting port, the other end of the inner protective sleeve is magnetically connected with the outer side of the jet nozzle through a second magnetic suction block to enhance the tightness of the connection with the jet nozzle; one end of the inner protective sleeve is provided with a folding mechanism, a pushing block is in abutment with the inner protective sleeve under the action of a folding motor, a folding screw rod and a folding screw to prevent the inner protective sleeve from being opened in advance due to excessive resistance caused by complex terrain; an angle adjusting mechanism is arranged inside the base, when a hydraulic rod is elongated, the hydraulic rod is rotated upward through a hinged structure at both ends of the hydraulic rod to lift a support frame, a rotating plate at the bottom of a mounting seat is rotated and opened, and then a drilling rod and the jet nozzle are driven to quickly adjust the direction.

Description

Technical Field

[0001] This invention relates to the field of gas cutter technology, and more specifically to a gas cutter with a sealing function. Background Technology

[0002] The definition of gas is quite broad, not a single thing. It includes natural gas in daily life and coal mine gas. Gas is formed in the early stages of coal formation from ancient plants, when cellulose and organic matter are decomposed by anaerobic bacteria. Under high temperature and pressure, gas continues to be generated during coal formation due to physical and chemical processes. Gas is a colorless, tasteless, and odorless gas, but sometimes it can be smelled with an apple-like fragrance because aromatic hydrocarbon gases are released at the same time. Gas has a permeability 1.6 times that of air, is poorly soluble in water, does not support combustion, and cannot sustain breathing. When it reaches a certain concentration, it can cause asphyxiation due to lack of oxygen and can also cause combustion or explosion. Gas exists in coal seams or surrounding rocks in both free and adsorbed states. Gas cutters are used to extract gas from coal seams, increasing the amount of gas extracted and thus improving the efficiency of coal seam gas extraction.

[0003] Jet-type slotting equipment generally includes components such as a tracked water pump truck, a tracked hydraulic drilling rig, a high-pressure jet safety control device, a high-pressure rotating water tail, a high-pressure sealing drill rod, and a high-pressure jet nozzle. Jet-type slotting equipment is a relatively mature technology that increases the effective radius of the borehole by 3-10 times, realizing the integrated function of drilling, jetting, and cutting. During operation, the drill rod is in a high-speed rotating state and needs to be connected to a high-pressure water pipe through a high-pressure rotating water tail. However, during operation, the water flow needs to be ejected from the top of the drill rod, so the jetting orifice at the top of the drill rod is exposed and easily blocked by mud and sand. Long-term blockage will cause damage to the jetting components. To address this, we have proposed a gas slotting device with a sealing function. Summary of the Invention

[0004] To address the problems mentioned in the background art, the present invention aims to provide a gas cutter with sealing function, comprising a base and a drive motor, wherein the drive motor is movably connected to the base, the drive shaft of the drive motor is connected to a drill rod, a high-pressure water pipe is disposed inside the drill rod, a jet nozzle is disposed at the end of the drill rod, and the high-pressure water pipe is connected to the jet nozzle.

[0005] The jet nozzle is equipped with a sealing and protection mechanism, which includes an outer protective sleeve and an inner protective sleeve. The outer protective sleeve is a frustum-shaped shell structure, and the inner protective sleeve includes several protective plates. The protective plates are fan-shaped structures with arc surfaces. The several protective plates together form a conical shell structure, and the tip of the inner protective sleeve penetrates from the inside of the outer protective sleeve.

[0006] The maximum diameter of the inner protective sleeve is greater than the small end diameter of the outer protective sleeve.

[0007] The inner protective sleeve is equipped with a flow guide layer. The flow guide layer is arc-shaped, and the flow guide layer has a semi-circular groove on the side opposite to the water flow direction. The flow guide layer can make the water flow sprayed by the jet nozzle swirl in the semi-circular groove and generate a reverse force.

[0008] Each protective sheet is equipped with a first magnetic block at its tip, which allows the protective sheets to attract each other and fit tightly together; the other end of each protective sheet is magnetically connected to the outside of the jet nozzle through a second magnetic block.

[0009] Each protective plate has a sliding groove on its outer side, and a sliding block matching the sliding groove is provided on the inner side of the outer protective sleeve. The inner and outer protective sleeves are connected by the sliding block and the sliding groove.

[0010] The support layer contains several take-up and release mechanisms, the number of which is the same as the number of protective plates. Each take-up and release mechanism is connected to one protective plate. Each take-up and release mechanism includes a take-up and release motor. A take-up and release screw is installed on one side of the take-up and release motor via a rotating shaft. The take-up and release screw is threadedly connected to a take-up and release sleeve. A limit block is provided on the side of the take-up and release sleeve closest to the take-up and release motor. The outer side of the limit block is slidably connected to the limit grooves on both sides of the groove. When the take-up and release screw rotates, it can drive the take-up and release sleeve to move axially along the drill rod in the limit groove. A push block is connected on the side of the take-up and release sleeve away from the take-up and release motor. One end of the push block abuts against the inner protective sleeve. The limit block is connected to the inner protective sleeve via a recovery rope.

[0011] The base is equipped with an angle adjustment mechanism, which includes a hydraulic rod, a support frame, a rotating connecting block, a rotating plate, a gas strut, and a reserved slot. The base is hinged to one end of the hydraulic rod, and the other end of the hydraulic rod is hinged to the support frame. The support frame is movably connected to the drilling rod. The top of the moving seat is hinged to the rotating plate through the rotating connecting block. Reserved slots are provided on the bottom of the rotating plate and the upper side of the moving seat. The reserved slot inside the moving seat is hinged to one end of the gas strut, and the other end of the gas strut is slidably connected to the reserved slot at the bottom of the rotating plate.

[0012] There are two sets of hydraulic rods, which are arranged opposite each other on both sides of the rotating plate.

[0013] A support layer is provided on the outside of the jet nozzle, and the outside of the support layer is rotatably connected to the inside of the drill rod through a sliding connection groove and a sliding connection block.

[0014] The drive motor is fixedly mounted on the upper surface of the mounting base, and a movable base is connected to the lower surface of the mounting base. The movable base is threadedly connected to the adjusting screw, which is parallel to the drilling rod. One end of the adjusting screw is connected to the output shaft of the adjusting motor, and the other end is rotatably connected to the inner wall of the base. A guide rod is inserted inside the movable base, which is parallel to the adjusting screw, and both ends of the guide rod are fixedly connected to the inner wall of the base.

[0015] The beneficial effects of this invention are:

[0016] (1) It can block and protect the through hole at the top of the jet nozzle. A blocking and protection mechanism is set on the outside of the jet nozzle. The outer protective sleeve is slidably installed on the outside of the outer protective sleeve through the sliding block and the sliding groove. One end of the inner protective sleeve is attracted to each other through the first magnetic block to tightly connect the connection port. The other end of the inner protective sleeve is magnetically connected to the outside of the jet nozzle through the second magnetic block to enhance the tightness of the connection with the jet nozzle. This allows for better blocking and protection of the jet nozzle and is easy to operate.

[0017] (2) In order to facilitate the smooth opening of the sealing and protection mechanism in complex terrain, a retraction mechanism is set at one end of the inner protective sleeve. When the inner protective sleeve is attracted by the magnetic attraction of the first magnetic block and moves down under the auxiliary sliding action of the sliding groove of the sliding block until the magnetic attraction is completed, the pushing block abuts against the inner protective sleeve under the action of the retraction and discharge motor, the retraction and discharge screw, and the retraction and discharge screw, so as to prevent the sealing and protection mechanism from opening prematurely due to excessive resistance encountered by the drilling rod and the top inner protective sleeve during drilling due to complex terrain.

[0018] (3) The angle of the drill rod can be adjusted according to the collection location. When the hydraulic rod is extended, the support frame is lifted by rotating upward through the hinge structure at both ends. At this time, the rotating plate at the bottom of the mounting base rotates and opens, thereby driving the drive motor, high pressure water pipe, drill rod and jet nozzle to quickly adjust the direction. The drilling angle of the drill rod can be quickly adjusted, saving time and effort. Attached Figure Description

[0019] Figure 1 A schematic diagram of a gas cutter with sealing function;

[0020] Figure 2 A schematic diagram of the internal structure of the drill rod of the gas cutter with sealing function of the present invention;

[0021] Figure 3 A schematic diagram of the cross-sectional structure of the sealing and protection mechanism of the gas cutter with sealing function of the present invention;

[0022] Figure 4 A schematic diagram of the rotating plate connection structure of the gas cutter with sealing function of the present invention;

[0023] Figure 5 A schematic diagram of the angle adjustment mechanism of the gas cutter with sealing function of the present invention.

[0024] Figure label:

[0025] 1-Base;

[0026] 2-Adjusting motor; 21-Adjusting screw; 22-Guide rod; 23-Moving seat; 24-Mounting base;

[0027] 3-Drive motor; 31-High-pressure water pipe; 32-Drill rod; 33-Jet nozzle; 34-Support layer;

[0028] 4-Blocking and protective mechanism; 41-Protective plate; 42-Outer protective sleeve; 43-Sliding block; 44-Sliding groove; 45-Inner protective sleeve; 46-Guiding layer; 47-First magnetic block; 48-Second magnetic block; 49-Semi-circular slot;

[0029] 5-Retracting and releasing mechanism; 51-Retracting and releasing motor; 52-Retracting and releasing screw; 53-Retracting and releasing sleeve; 54-Limiting block; 55-Limiting groove; 56-Pushing block; 57-Retracting rope;

[0030] 6-Angle adjustment mechanism; 61-Hydraulic rod; 62-Support frame; 63-Rotating connecting block; 64-Rotating plate; 65-Gas strut; 66-Pre-reserved slot. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. 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.

[0032] Please see Figure 1-5 This invention provides a gas cutter with sealing function, including a base 1 and a drive motor 3. The drive shaft of the drive motor 3 is connected to a drill rod 32. A high-pressure water pipe 31 is installed inside the drill rod 32, and a jet nozzle 33 is installed at the end of the drill rod 32. The high-pressure water pipe 31 communicates with the jet nozzle 33. A support layer 34 is installed on the outside of the jet nozzle 33, and the outside of the support layer 34 is rotatably connected to the inside of the drill rod 32 through a sliding connecting groove and a sliding connecting block. The drive motor 3 is fixedly installed on the upper surface of a mounting base 24, and a movable seat 23 is connected to the lower surface of the mounting base 24. The movable seat 23 is threadedly connected to an adjusting screw 21. The adjusting screw 21 is arranged parallel to the drill rod 32, with one end connected to the output shaft of the adjusting motor 2 and the other end rotatably connected to the inner wall of the base 1. During operation, the regulating motor 2 drives the regulating screw 21 to rotate. The screw 21 drives the mounting base 24 and the drilling rod 32 to move. In turn, the rotation of the drilling rod 32 transports the jet nozzle 33 to the designated position in the coal seam. At the same time, high-pressure water is injected into the high-pressure water pipe 31. The high-pressure water is accelerated by the jet nozzle 33 and then ejected to form a high-pressure rotating jet. This jet rotates and cuts the coal body around the borehole, forming a flat pressure relief groove. This increases the exposed area of ​​the coal body, increases the coal seam fracture rate and permeability, improves gas flow conditions, and ultimately achieves the goal of increasing the gas extraction rate.

[0033] To ensure the stability of the mounting base 24 when it moves, a guide rod 22 is inserted inside the movable base 23. The guide rod 22 is set parallel to the adjusting screw 21, and both ends of the guide rod 22 are fixedly connected to the inner wall of the base 1.

[0034] Since the jet nozzle 33 is exposed when not in operation, it is easily clogged by mud and sand. Long-term clogging will damage the jet nozzle 33. Therefore, a sealing and protection mechanism 4 is set on the outside of the jet nozzle 33. The sealing and protection mechanism 4 includes an outer protective sleeve 42 and an inner protective sleeve 45. The outer protective sleeve 42 is a frustum-shaped shell structure. The inner protective sleeve 45 includes several protective plates 41. The protective plates 41 are fan-shaped structures with arc surfaces. The several protective plates 41 together form a conical shell structure. The tip of the inner protective sleeve 45 penetrates from the inside of the outer protective sleeve 42. In this embodiment, When the inner protective sleeve 45 moves towards the smaller end of the outer protective sleeve 42, the four protective plates 41 are bound together until they close and block the jet nozzle 33. When the inner protective sleeve 45 moves towards the larger end of the outer protective sleeve 42, the four protective plates 41 are freed from the binding of the protective sleeve 42 and can separate from each other, opening the jet nozzle 33. To prevent the inner protective sleeve 45 from passing through the outer protective sleeve 42 and causing detachment when it moves towards the smaller end of the outer protective sleeve 42, the maximum diameter of the inner protective sleeve 45 is larger than the diameter of the smaller end of the outer protective sleeve 42.

[0035] The inner protective sleeve 45 has a flow guide layer 46 inside. The flow guide layer 46 is arc-shaped, and the side of the flow guide layer 46 opposite to the water flow direction has a semi-circular groove 49. When the drill rod 32 transports the jet nozzle 33 to the designated position in the coal seam, the water jet from the jet nozzle 33 swirls in the semi-circular groove 49, generating a reverse force that causes the inner protective sleeve 45 to move towards the larger end of the outer protective sleeve 42, helping to open the sealing and protective mechanism 4, thereby enabling water flow cutting.

[0036] To enhance the sealing of the tip of the inner protective sleeve 45, both ends of the inner protective sleeve 45 are magnetically connected by magnetic attraction, which strengthens the tightness of the seal and can effectively seal and protect the jet nozzle 33. Each protective plate 41 is provided with a first magnetic block 47 at its tip, which can attract the protective plates 41 to each other and make them fit tightly together; in order to enhance the tightness of the connection between the inner protective sleeve 45 and the jet nozzle 33, the other end of each protective plate 41 is magnetically connected to the outside of the jet nozzle 33 through a second magnetic block 48.

[0037] To ensure the stability of the opening and closing action of the inner protective sleeve 45, a sliding groove 44 is provided on the outer side of each protective piece 41, and a sliding block 43 matching the sliding groove 44 is provided on the inner side of the outer protective sleeve 42. The inner protective sleeve 45 and the outer protective sleeve 42 are connected by the sliding block 43 and the sliding groove 44 to guide and position the action of the inner protective sleeve 45.

[0038] See Figure 2 and Figure 3 The support layer 34 is provided with several take-up and release mechanisms 5. The number of take-up and release mechanisms 5 is the same as the number of protective plates 41. Each take-up and release mechanism 5 is connected to one protective plate 41. The take-up and release mechanism 5 includes a take-up and release motor 51. A take-up and release screw 52 is installed on one side of the take-up and release motor 51 through a rotating shaft. The take-up and release screw 52 is threadedly connected to the take-up and release sleeve 53. A limit block 54 is provided on the side of the take-up and release sleeve 53 near the take-up and release motor 51. The outer side of the limit block 54 is slidably connected to the limit grooves 55 on both sides of the groove. When the take-up and release screw 52 rotates, it can drive the take-up and release sleeve 53 to move axially along the drill rod 32 in the limit groove 55. A push block 56 is connected on the side of the take-up and release sleeve 53 away from the take-up and release motor 51. One end of the push block 56 abuts against the inner protective sleeve 45. The limit block 54 is connected to the inner protective sleeve 45 through a recovery rope 57. In practice, when the inner protective sleeve 45 is magnetically attracted by the first magnetic block 47 and closed with the assistance of the sliding groove 44 of the sliding block 43, the pushing block 56 at one end of the inner protective sleeve 45 abuts against the inner protective sleeve 45 under the action of the take-up and release motor 51, the take-up and release screw 52, ​​and the take-up and release screw 52. This prevents the sealing and protection mechanism 4 from opening prematurely due to excessive resistance encountered by the drill rod 32 and the top inner protective sleeve 45 during drilling, caused by complex terrain. When the drill rod 32 reaches the predetermined position, it stops rotating, and the take-up and release motor 51 is restarted. The take-up and release motor 51 drives the take-up and release screw 52 to rotate in the opposite direction and engage with the take-up and release screw sleeve 53. The take-up and release screw sleeve 53 moves away from the sealing and protection mechanism 4 under the sliding action of the limit blocks 54 and the limit groove 55 on both sides. The limit blocks 54 pull the inner protective sleeve 45 through the recovery rope 57 until the inner protective sleeve 45 is fully opened, so that the sealing and protection mechanism 4 can be opened smoothly in complex terrain.

[0039] When using a gas cutter to collect gas, the angle of the drill rod 32 needs to be adjusted according to the collection location. To this end, the present invention provides an angle adjustment mechanism 6 inside the base 1. The angle adjustment mechanism 6 includes a hydraulic rod 61, a support frame 62, a rotating connecting block 63, a rotating plate 64, a gas strut 65, and a reserved slot 66. One end of the hydraulic rod 61 is hinged to the base 1, and the other end of the hydraulic rod 61 is hinged to the support frame 62. The support frame 62 is movably connected to the drill rod 32. The top of the movable seat 23 is hinged to the rotating plate 64 through the rotating connecting block 63. Reserved slots 66 are provided at the bottom of the rotating plate 64 and on the upper side of the movable seat 23. The reserved slot 66 inside the movable seat 23 is hinged to one end of the gas strut 65, and the other end of the gas strut 65 is slidably connected to the reserved slot 66 at the bottom of the rotating plate 64. Two sets of hydraulic rods 61 are provided and are arranged opposite to each other on both sides of the rotating plate 64. In practice, the hydraulic rod 61 is activated, extending and rotating upward to lift the support frame 62. At this time, the rotating plate 64 at the bottom of the mounting base 24 rotates and opens, thereby driving the drive motor 3, high-pressure water pipe 31, drilling rod 32, and jet nozzle 33 to quickly adjust their direction. The air strut 65, which is rotatably installed in the slot at the bottom of the rotating plate 64 and the top of the moving base 23, opens accordingly. The force supporting the air strut 65 can quickly adjust the drilling angle of the drilling rod 32, while effectively reducing the vibration generated by the drive motor 3 during operation.

Claims

1. A gas cutter with sealing function, comprising a base (1) and a drive motor (3), wherein the drive motor (3) is movably connected to the base (1), the drive shaft of the drive motor (3) is connected to a drill rod (32), a high-pressure water pipe (31) is provided inside the drill rod (32), and a jet nozzle (33) is provided at the end of the drill rod (32), wherein the high-pressure water pipe (31) is connected to the jet nozzle (33); Its features are: The jet nozzle (33) is provided with a sealing and protection mechanism (4). The sealing and protection mechanism (4) includes an outer protective sleeve (42) and an inner protective sleeve (45). The outer protective sleeve (42) is a frustum-shaped shell structure. The inner protective sleeve (45) includes several protective plates (41). The protective plates (41) are fan-shaped structures with arc surfaces. The several protective plates (41) together form a conical shell structure. The tip of the inner protective sleeve (45) penetrates from the inside of the outer protective sleeve (42). The inner protective sleeve (45) is provided with a flow guide layer (46). The flow guide layer (46) is arc-shaped, and the flow guide layer (46) has a semi-circular groove (49) on the side opposite to the direction of water flow. The flow guide layer (46) can make the water flow sprayed by the jet nozzle (33) swirl in the semi-circular groove (49) and generate a reverse force. The support layer (34) is provided with several take-up and release mechanisms (5). The number of take-up and release mechanisms (5) is the same as the number of protective plates (41). Each take-up and release mechanism (5) is connected to one protective plate (41). The take-up and release mechanism (5) includes a take-up and release motor (51). A take-up and release screw (52) is installed on one side of the take-up and release motor (51) through a rotating shaft. The take-up and release screw (52) is threadedly connected to the take-up and release sleeve (53). A limit block is provided on the side of the take-up and release sleeve (53) near the take-up and release motor (51). 54), the outer side of the limiting block (54) is slidably connected to the limiting grooves (55) on both sides of the groove. When the take-up screw (52) rotates, it can drive the take-up sleeve (53) to move axially along the drill rod (32) in the limiting groove (55). The side of the take-up sleeve (53) away from the take-up and discharge machine (51) is connected to the push block (56). One end of the push block (56) abuts against the inner protective sleeve (45). The limiting block (54) is connected to the inner protective sleeve (45) through the recovery rope (57).

2. A gas cutter with sealing function according to claim 1, characterized in that: The maximum diameter of the inner protective sleeve (45) is greater than the small end diameter of the outer protective sleeve (42).

3. A gas cutter with sealing function according to claim 1, characterized in that: Each protective sheet (41) has a first magnetic block (47) at its tip, which allows the protective sheets (41) to attract each other and fit tightly together; the other end of each protective sheet (41) is magnetically connected to the outside of the jet nozzle (33) through a second magnetic block (48).

4. A gas cutter with sealing function according to claim 1, characterized in that: Each protective sheet (41) has a sliding groove (44) on its outer side, and the outer protective sleeve (42) has a sliding block (43) that matches the sliding groove (44) on its inner side. The inner protective sleeve (45) and the outer protective sleeve (42) are connected by the sliding block (43) and the sliding groove (44).

5. A gas cutter with sealing function according to claim 1, characterized in that: An angle adjustment mechanism (6) is provided inside the base (1). The angle adjustment mechanism (6) includes a hydraulic rod (61), a support frame (62), a rotating connecting block (63), a rotating plate (64), a gas strut (65), and a reserved slot (66). One end of the hydraulic rod (61) is hinged to the base (1), and the other end of the hydraulic rod (61) is hinged to the support frame (62). The support frame (62) is movably connected to the drilling rod (32). The top of the moving seat (23) is hinged to the rotating plate (64) through the rotating connecting block (63). A reserved slot (66) is provided at the bottom of the rotating plate (64) and on the upper side of the moving seat (23). The reserved slot (66) inside the moving seat (23) is hinged to one end of the gas strut (65), and the other end of the gas strut (65) is slidably connected to the reserved slot (66) at the bottom of the rotating plate (64).

6. A gas cutter with sealing function according to claim 5, characterized in that: Two sets of hydraulic rods (61) are provided and are arranged opposite each other on both sides of the rotating plate (64).

7. A gas cutter with sealing function according to claim 1, characterized in that: A support layer (34) is provided on the outside of the jet nozzle (33). The support layer (34) is rotatably connected to the inside of the drill rod (32) through a sliding connection groove and a sliding connection block.

8. A gas cutter with sealing function according to claim 1, characterized in that: The drive motor (3) is fixedly mounted on the upper surface of the mounting base (24). The lower surface of the mounting base (24) is connected to the movable base (23). The movable base (23) is threadedly connected to the adjusting screw (21). The adjusting screw (21) is parallel to the drilling rod (32). One end of the adjusting screw (21) is connected to the output shaft of the adjusting motor (2), and the other end is rotatably connected to the inner wall of the base (1). A guide rod (22) is inserted inside the movable base (23). The guide rod (22) is parallel to the adjusting screw (21), and both ends of the guide rod (22) are fixedly connected to the inner wall of the base (1).

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