Mechanical water jet cutter device for coal mine

Abstract

A mechanical water jet cutter device for a coal mine comprises a mechanical water jet cutter body provided with a drill front head (1), a drill tail head (2), a first cutter wing plate (6) and a second cutter wing plate (7), and a reset telescopic assembly arranged between the drill front head (1) and the drill tail head (2) and between the first cutter wing plate (6) and the second cutter wing plate (7). According to the invention, transverse movement of the first blade plate (6) and the second blade plate (7) is converted into swinging movement driving, expanding and closing movement driven by single transverse impact high-pressure water flow is realized, and the technical problem that the blade plates are directly mounted on the side surface of a drill rod is solved, so that the expanding effect of the blade plates is improved.

Description

Technical Field

[0001] This utility model relates to a mechanical water jet, and more particularly to a mechanical water jet device for coal mines. Background Technology

[0002] Mechanical water jets are used to enlarge boreholes, thereby increasing the borehole diameter. Therefore, mechanical water jet devices in coal mines are important components of coal mining machinery. In existing mechanical water jet devices, the cutter blades are directly mounted on the side of the drill rod, and water jets from nozzles located on the side of the drill rod expand the cutter blades. However, due to the unilateral action of the water flow, the expansion effect of the cutter blades is affected.

[0003] This invention effectively explores and studies the technical features of the mechanical waterjet body and the reset telescopic assembly by using a single transverse impact high-pressure water flow to drive the expansion and contraction motion. It also addresses the technical problem of directly mounting the cutter blade plate on the side of the drill rod. Summary of the Invention

[0004] The subject of this utility model is a mechanical water jet device for coal mines.

[0005] In order to overcome the above-mentioned technical shortcomings, the purpose of this utility model is to provide a mechanical water jet device for coal mines, thereby improving the opening effect of the cutter blade.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a mechanical waterjet body comprising a front drill head, a tail drill head, a first cutter blade, and a second cutter blade, and a reset telescopic assembly disposed between the front drill head and the tail drill head and the first cutter blade and the second cutter blade.

[0007] By designing a mechanical water jet body and a reset telescopic assembly, the mechanical water jet body enables hole enlargement, while the reset telescopic assembly enables the lateral movement and swinging motion of the first and second cutter blades. This allows for expansion and contraction driven by a single lateral impact high-pressure water flow, solving the technical problem of directly mounting the cutter blades on the side of the drill rod, thus improving the expansion effect of the cutter blades.

[0008] This utility model is designed to connect the mechanical water jet body and the reset telescopic component in a manner driven by a single transverse impact high-pressure water flow to perform an expansion and contraction motion.

[0009] This utility model is designed to connect the reset telescopic component to the mechanical water jet body in a way that drives the lateral movement conversion swing motion.

[0010] This utility model designs a reset telescopic assembly comprising a cylindrical shell, a shaft head, a piston head, and a return spring.

[0011] The technical effects of the above four technical solutions are: highlighting the technical characteristics of expansion and contraction motion driven by single transverse impact high-pressure water flow, and introducing their application in the technical field of mechanical water jet devices for coal mines.

[0012] This utility model is designed to include a first accessory device, which is disposed between the reset telescopic assembly and the mechanical water jet body. The first accessory device is configured to include a first sealing ring, a second sealing ring, and a fourth sealing ring.

[0013] This utility model is designed to include a second accessory device, which is disposed on the mechanical water jet body and is configured as a third sealing ring.

[0014] The technical effect of the above two technical solutions is that they enable the integrated installation of other components and expand the technical effect of this utility model.

[0015] This utility model is designed with a cylindrical shell between the drill head and the drill tail head, a first sealing ring and a fourth sealing ring between the drill head and the cylindrical shell, a second sealing ring between the drill tail head and the cylindrical shell, a third sealing ring on the drill head, a piston head inside the cylindrical shell, a shaft head between the piston head and the cylindrical shell, a return spring between the piston head and the drill head, and a first cutter blade and a second cutter blade on the piston head.

[0016] The technical effect of the above technical solution is that the basic technical solution of this utility model is composed of the drill head, drill tail head, shell, shaft head, piston head, first cutter blade, second cutter blade, return spring, first sealing ring, second sealing ring, third sealing ring and fourth sealing ring, which solves the technical problem of this utility model.

[0017] This utility model designs a drill head comprising a cylindrical part I and a cylindrical part II, with a receiving groove provided on the periphery of the inner contraction body of cylindrical part II. The inner end face of cylindrical part I is connected to the inner end face of cylindrical part II, and a third sealing ring is provided between cylindrical part I and cylindrical part II. The rear end expansion hole of cylindrical part II is respectively configured to be received and connected to the piston head, the return spring and the first sealing ring, and the middle wall of the stepped hole of cylindrical part II is configured to be contacted and connected to the return spring. The outer side of the inner wall of the rear end expansion hole of cylindrical part II is configured to be received and connected to the first sealing ring, and the rear end contraction body of cylindrical part II is configured to be threaded and connected to the shell. The stepped body on the outer periphery of cylindrical part II is respectively configured to be contacted and connected to the shell and the fourth sealing ring, and cylindrical part I is configured to be threaded and connected to the adjacent drill tail head.

[0018] This utility model is designed such that cylindrical part I is a conical tube and cylindrical part II is a convex-shaped tube, and the receiving trough is a shaped trough and the receiving trough is arranged at intervals along the periphery outline of cylindrical part II.

[0019] This utility model designs a drill tail head as a convex rod-shaped body with a convex-shaped hole, and the tapered extended threaded hole of the drill tail head is configured to be threadedly connected to the adjacent drill head. The contraction body of the drill tail head is configured to be threadedly connected to the shell, and the stepped body on the outer peripheral side of the drill tail head is configured to be contacted with the shell.

[0020] The technical effect of the above three technical solutions is that they enable the docking connection of drill pipes.

[0021] The present invention is designed such that the first blade plate and the second blade plate are respectively configured as P-shaped sheet bodies, and the extended inner ends of the first blade plate and the extended inner ends of the second blade plate are respectively configured to be connected to the piston head by a pin. The front side of the extended inner end of the first blade plate and the front side of the extended inner end of the second blade plate are respectively configured to be connected to the cylindrical shell by a pin.

[0022] The technical effect of the above solution is that it enables the horizontal and horizontal movement of the two plates to expand the hole.

[0023] This utility model is designed with a receiving hole I on the upper end face of the cylindrical part III and a receiving hole II on the lower end face of the cylindrical part III. Receiving holes IV are provided on the front and rear sides of the cylindrical part III. The cylindrical part III is configured to be fitted with a piston head. The rear end of the inner wall of the cylindrical part III is configured to be fitted with a second sealing ring. The receiving hole I is configured to be fitted with a first cutter blade plate. The rear end of the inner wall of the receiving hole I is configured to be fitted with a pin end located on the first cutter blade plate. The receiving hole II is configured to be fitted with a second cutter blade plate. The rear end of the inner wall of the receiving hole II is configured to be fitted with a pin end located on the second cutter blade plate. The receiving hole IV is configured to be fitted with a shaft head. The front port of the cylindrical part III is configured to be threadedly fitted with a drill head. The rear port of the cylindrical part III is configured to be threadedly fitted with a drill tail head.

[0024] The present invention is designed such that the cylindrical part III is configured as a tubular body and the receiving hole I, receiving hole II and receiving hole IV are respectively configured as elongated holes.

[0025] This utility model is designed with a shaft head configured as a rod-shaped body, and the end of the shaft head is configured to be slidably connected to the cylindrical shell, while the middle part of the shaft head is configured to be through-connected to the piston head.

[0026] This utility model designs a piston head comprising a rod I and a rod II, with a water spray channel in rod II. The inner end face of rod I is connected to the inner end face of rod II, and the outer end face of rod I is connected to a return spring. Rod I is connected through the drill bit, and its peripheral side is connected to a first sealing ring. Rod II is connected through the cylinder shell, and its outer contraction end is connected to a second sealing ring. The upper end face of rod II is connected to a first cutter blade plate via a pin, and the lower end face of rod II is connected to a second cutter blade plate via a pin. The middle of rod II is connected to a shaft head via a sleeve.

[0027] This utility model designs a rod part I as a rod-shaped body and a rod part II as a convex rod-shaped body with a through hole in the middle and U-shaped grooves on the upper and lower end faces. The through hole of rod part II is configured to be connected to the shaft head, and the U-shaped grooves of rod part II are respectively configured to be connected to the first blade plate and the second blade plate through pins. The water spray channel body is configured with one section having a U-shaped hole and the other section having a straight through hole. The port of the U-shaped hole of the water spray channel body is located on the edge of the inner end face of rod part II, and the port of the straight through hole of the water spray channel body is located on the middle of the outer end face of rod part II.

[0028] The technical effect of the above five technical solutions is that they enable the lateral movement of the directional telescopic cylinder.

[0029] This utility model is designed such that the return spring is a column spring and is configured to be submerged in connection with the drill head, one end of the return spring is configured to be in contact with the drill head and the other end of the return spring is configured to be in contact with the piston head.

[0030] The technical effects of the above solutions are: they enable elastic energy storage for return to position and improve the closing performance of the first and second blade plates.

[0031] This utility model is designed such that the first sealing ring and the second sealing ring are respectively configured as sealing rings with a cross-section of U-shape, and the outer part of the first sealing ring is configured to be embedded and connected with the drill bit, the outer part of the second sealing ring is configured to be embedded and connected with the shell, and the inner wall of the first sealing ring and the inner wall of the second sealing ring are respectively configured to be in contact with the piston head.

[0032] The technical effect of the above solution is that it enables the sealing treatment by expanding the sealing ring.

[0033] This utility model is designed such that the third sealing ring and the fourth sealing ring are respectively set as O-shaped sealing rings, and the inner side of the third sealing ring and the inner side of the fourth sealing ring are respectively set to be embedded and connected with the drill head. The outer wall of the third sealing ring is set to be connected to the drill tail head in contact, and the outer wall of the fourth sealing ring is set to be connected to the shell in contact.

[0034] The technical effect of the above solution is that it enables the elastic sealing ring to perform sealing treatment.

[0035] This utility model is designed such that the drill head, drill tail head, first cutter blade, second cutter blade, cylinder shell, shaft head, piston head, and return spring are arranged in a manner of built-in sliding components, and the drill head, drill tail head, first cutter blade, second cutter blade, cylinder shell, shaft head, piston head, and return spring are arranged in a manner of built-in sealing components, along with the first sealing ring, second sealing ring, third sealing ring, and fourth sealing ring.

[0036] This utility model is designed such that the center lines of the drill head, drill tail head, cylinder shell, shaft head, piston head, return spring, first sealing ring, second sealing ring, third sealing ring and fourth sealing ring are set on the same straight line, and rod part I is set to be connected to cylinder part II, and rod part II is set to be connected to cylinder part II.

[0037] The present invention is designed such that the included angle α between the first blade plate and the second blade plate in the expanded state is set to 158-160°.

[0038] The technical effect of the above solution is that it enables the first and second blade plates to be expanded at extreme angles, thereby increasing the diameter of the enlarged hole.

[0039] In this technical solution, the single transverse impact high-pressure water flow driven by the single transverse impact high-pressure water flow to perform the expansion and contraction motion is realized by the reset telescopic component.

[0040] In this technical solution, the mechanical water jet body and the reset telescopic assembly, which are driven by a single transverse impact high-pressure water flow to perform expansion and contraction motion, are the key technical features. In the technical field of mechanical water jet devices for coal mines, this solution is novel, inventive, and practical. The terminology used in this technical solution can be explained and understood using patent literature in this technical field. Attached Figure Description

[0041] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0042] Figure 1 This is a schematic diagram of one of the first embodiments of the present utility model.

[0043] Drill head-1, drill tail head-2, shell-3, shaft head-4, piston head-5, first cutter blade-6, second cutter blade-7, return spring-8, first sealing ring-9, second sealing ring-91, third sealing ring-92, fourth sealing ring-90, cylinder I-11, cylinder II-12, receiving groove-13, cylinder III-31, receiving hole I-32, receiving hole II-33, receiving hole IV-34, rod I-51, rod II-52, water spray channel body-53. Detailed Implementation

[0044] According to the examination guidelines, terms such as “having,” “comprising,” and “including” used in this invention should be understood as not dispensing the presence or addition of one or more other elements or combinations thereof.

[0045] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0046] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0047] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other. In addition, unless otherwise specified, the equipment and materials used in the following embodiments are all commercially available. If the processing conditions are not explicitly stated, please refer to the product manual or follow the conventional methods in the field.

[0048] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0049] Figure 1 This is one of the first embodiments of the present utility model. The embodiment is described in detail with reference to the accompanying drawings. It includes a drill head 1, a drill tee head 2, a shell 3, a shaft head 4, a piston head 5, a first cutter blade 6, a second cutter blade 7, a return spring 8, a first sealing ring 9, a second sealing ring 91, a third sealing ring 92, and a fourth sealing ring 90. A shell 3 is disposed between the drill head 1 and the drill tee head 2. The first sealing ring 9 and the fourth sealing ring 90 are respectively disposed between the drill head 1 and the shell 3. A second sealing ring 91 is disposed between the drill tee head 2 and the shell 3. A third sealing ring 92 is disposed on the drill head 1. A piston head 5 is disposed within the shell 3. A shaft head 4 is disposed between the piston head 5 and the shell 3. A return spring 8 is disposed between the piston head 5 and the drill head 1. The first cutter blade 6 and the second cutter blade 7 are respectively disposed on the piston head 5.

[0050] The second embodiment of the present invention will be described in detail with reference to the accompanying drawings.

[0051] In this embodiment, the drill head 1 is configured to include a cylindrical part I 11 and a cylindrical part II 12, and a receiving groove 13 is provided on the periphery of the inner contraction body of the cylindrical part II 12. The inner end face of the cylindrical part I 11 is configured to be connected to the inner end face of the cylindrical part II 12, and a third sealing ring 92 is provided between the cylindrical part I 11 and the cylindrical part II 12. The rear end expansion hole of the cylindrical part II 12 is configured to be accommodatingly connected to the piston head 5, the return spring 8 and the first sealing ring 9, respectively. The middle wall of the stepped hole of the cylindrical part II 12 is configured to be contacting the return spring 8. The outer side of the inner wall of the rear end expansion hole of the cylindrical part II 12 is configured to be accommodatingly connected to the first sealing ring 9, and the rear end contraction body of the cylindrical part II 12 is configured to be threadedly connected to the shell 3. The stepped body on the outer periphery of the cylindrical part II 12 is configured to be contacting the shell 3 and the fourth sealing ring 90, respectively. The cylindrical part I 11 is configured to be threadedly connected to the adjacent drill tail head 2.

[0052] Through the drill head 1, support connection points for the drill tail head 2, cylinder shell 3, piston head 5, return spring 8, first sealing ring 9, third sealing ring 92, and fourth sealing ring 90 are formed. The connection with the drill tail head 2 is achieved by the cylindrical part I 11, the connection with the cylinder shell 3 is achieved by the cylindrical part II 12, the connection with the piston head 5 is achieved, the connection with the return spring 8 is achieved, the connection with the first sealing ring 9 is achieved, the connection with the fourth sealing ring 90 is achieved, and the connection with the third sealing ring 92 is achieved by the cylindrical part I 11 and the cylindrical part II 12. The peripheral groove treatment of the cylindrical part II 12 is achieved by the receiving groove body 13. Its technical purpose is: to be used as a support carrier for the cylinder shell 3, piston head 5, return spring 8, first sealing ring 9, third sealing ring 92, and fourth sealing ring 90.

[0053] In this embodiment, the cylindrical part I 11 is set as a conical tubular body and the cylindrical part II 12 is set as a medium-shaped tubular body with a convex shape. The receiving groove body 13 is set as a U-shaped groove body and the receiving groove body 13 is arranged and distributed at intervals along the peripheral contour line of the cylindrical part II 12.

[0054] Its technical purpose is: to achieve the tubular support for the cylinder shell 3, piston head 5, return spring 8, first sealing ring 9, third sealing ring 92, and fourth sealing ring 90.

[0055] In this embodiment, the drill tail head 2 is set as a convex-shaped rod body with a convex-shaped hole body, and the tapered expansion threaded hole of the drill tail head 2 is set to be threadedly connected to the adjacent drill head 1. The contracted body of the drill tail head 2 is set to be threadedly connected to the cylinder shell 3, and the outer peripheral side step body of the drill tail head 2 is set to be in contact connection with the cylinder shell 3.

[0056] Through the drill tail head 2, support connection points for the drill head 1 and the cylinder shell 3 are formed. The connection with the drill head 1 is achieved by the drill tail head 2, and the connection with the cylinder shell 3 is achieved. Its technical purpose is: to be used as a support carrier for the cylinder shell 3.

[0057] In this embodiment, a receiving hole I 32 is provided on the upper end face of the cylindrical part III 31 of the shell 3, and a receiving hole II 33 is provided on the lower end face of the cylindrical part III 31. A receiving hole IV 34 is provided on the front and rear sides of the cylindrical part III 31. The cylindrical part III 31 is configured to be fitted with the piston head 5. The rear end of the inner wall of the cylindrical part III 31 is configured to be fitted with the second sealing ring 91. The receiving hole I 32 is configured to be fitted with the first cutter wing plate 6. The rear end of the inner wall of the receiving hole I 32 is configured to be fitted with the pin end located on the first cutter wing plate 6. The receiving hole II 33 is configured to be fitted with the second cutter wing plate 7. The rear end of the inner wall of the receiving hole II 33 is configured to be fitted with the pin end located on the second cutter wing plate 7. The receiving hole IV 34 is configured to be fitted with the shaft head 4. The front port of the cylindrical part III 31 is configured to be threadedly fitted with the drill head 1, and the rear port of the cylindrical part III 31 is configured to be threadedly fitted with the drill tail head 2.

[0058] The cylindrical shell 3 forms a support connection point for the drill head 1, drill tee head 2, shaft head 4, piston head 5, first cutter blade 6, second cutter blade 7, and second sealing ring 91. The cylindrical part Ⅲ31 connects to the drill head 1, the drill tee head 2, the piston head 5, and the second sealing ring 91. The receiving hole Ⅳ34 connects to the shaft head 4, the receiving hole Ⅰ32 connects to the first cutter blade 6, and the receiving hole Ⅱ33 connects to the second cutter blade 7. Its technical purpose is to serve as a support carrier for the piston head 5.

[0059] In this embodiment, the cylindrical part Ⅲ31 is configured as a tubular body and the receiving hole Ⅰ32, receiving hole Ⅱ33 and receiving hole Ⅳ34 are respectively configured as elongated holes.

[0060] Its technical objective is to achieve tube support for the piston head 5.

[0061] In this embodiment, the shaft head 4 is configured as a rod-shaped body and the end of the shaft head 4 is configured to be slidably connected to the cylindrical shell 3, while the middle part of the shaft head 4 is configured to be connected through the piston head 5.

[0062] The shaft head 4 forms a support connection point for the cylinder shell 3 and the piston head 5. The shaft head 4 connects the cylinder shell 3 and the piston head 5. Its technical purpose is to serve as a component for connecting the piston head 5 and the cylinder shell 3.

[0063] In this embodiment, the piston head 5 is configured to include rod portion I 51 and rod portion II 52, and a water spray channel body 53 is provided in rod portion II 52. The inner end face of rod portion I 51 is connected to the middle of the inner end face of rod portion II 52, and the outer end face of rod portion I 51 is connected to the return spring 8. Rod portion I 51 is connected to the drill head 1 through the drill bit, and the peripheral side of rod portion I 51 is connected to the first sealing ring 9. Rod portion II 52 is connected to the shell 3 through the drill bit, and the outer contraction end of rod portion II 52 is connected to the second sealing ring 91. The upper end face of rod portion II 52 is connected to the first cutter blade plate 6 through a pin, and the lower end face of rod portion II 52 is connected to the second cutter blade plate 7 through a pin. The middle of rod portion II 52 is connected to the shaft head 4 in a sleeve-type connection.

[0064] Piston head 5 forms a support connection point for drill head 1, cylinder shell 3, shaft head 4, first cutter blade 6, second cutter blade 7, return spring 8, first sealing ring 9 and second sealing ring 91. Rod part I 51 connects to drill head 1, return spring 8 and first sealing ring 9. Rod part II 52 connects to cylinder shell 3, shaft head 4, first cutter blade 6, second cutter blade 7 and second sealing ring 91. High-pressure water flow is processed through water jet channel body 53. Its technical purpose is to serve as a support carrier for first cutter blade 6 and second cutter blade 7.

[0065] In this embodiment, rod I 51 is configured as a rod-shaped body and rod II 52 is configured as a convex rod-shaped body with a through hole in the middle and U-shaped grooves on the upper and lower end faces. The through hole of rod II 52 is configured to be connected to the shaft head 4, and the U-shaped grooves of rod II 52 are configured to be connected to the first blade plate 6 and the second blade plate 7 respectively through pins. The water spray channel body 53 is configured with one section having a U-shaped hole and the other section having a straight through hole. The port of the U-shaped hole of the water spray channel body 53 is located on the edge of the inner end face of rod II 52, and the port of the straight through hole of the water spray channel body 53 is located on the middle of the outer end face of rod II 52.

[0066] Its technical objective is to achieve rod-like support for the first blade plate 6 and the second blade plate 7.

[0067] In this embodiment, the first blade plate 6 and the second blade plate 7 are respectively configured as P-shaped sheet bodies, and the extended inner ends of the first blade plate 6 and the extended inner ends of the second blade plate 7 are respectively configured to be connected to the piston head 5 through pins. The front side of the extended inner end of the first blade plate 6 and the front side of the extended inner end of the second blade plate 7 are respectively configured to be connected to the cylindrical shell 3 through pins.

[0068] The first blade plate 6 and the second blade plate 7 form a support connection point for the cylinder shell 3 and the piston head 5. The first blade plate 6 and the second blade plate 7 realize the connection with the cylinder shell 3 and the piston head 5. Its technical purpose is to be used as a component for enlarging the hole.

[0069] In this embodiment, the return spring 8 is configured as a column spring and is configured to be submerged in connection with the drill head 1. One end of the return spring 8 is configured to be in contact with the drill head 1 and the other end of the return spring 8 is configured to be in contact with the piston head 5.

[0070] The return spring 8 forms a support connection point for the drill head 1 and the piston head 5. The return spring 8 realizes the connection with the drill head 1 and the piston head 5. Its technical purpose is to serve as a component for elastic connection between the piston head 5 and the drill head 1.

[0071] In this embodiment, the first sealing ring 9 and the second sealing ring 91 are respectively configured as sealing rings with a U-shaped cross section, and the outer part of the first sealing ring 9 is configured to be embedded and connected to the drill head 1, the outer part of the second sealing ring 91 is configured to be embedded and connected to the shell 3, and the inner wall of the first sealing ring 9 and the inner wall of the second sealing ring 91 are respectively configured to be in contact with the piston head 5.

[0072] The first sealing ring 9 and the second sealing ring 91 form a support connection point for the drill head 1, the shell 3 and the piston head 5. The first sealing ring 9 connects to the drill head 1, the second sealing ring 91 connects to the shell 3 and the piston head 5. The technical purpose is to serve as a component for sealing the piston head 5 between the drill head 1 and the shell 3 respectively.

[0073] In this embodiment, the third sealing ring 92 and the fourth sealing ring 90 are respectively configured as O-shaped sealing rings, and the inner side of the third sealing ring 92 and the inner side of the fourth sealing ring 90 are respectively configured to be embedded and connected to the drill head 1. The outer wall of the third sealing ring 92 is configured to be connected to the drill tail head 2 in contact, and the outer wall of the fourth sealing ring 90 is configured to be connected to the shell 3 in contact.

[0074] The third sealing ring 92 and the fourth sealing ring 90 form a support connection point for the drill head 1, the drill tee head 2 and the shell 3. The third sealing ring 92 and the fourth sealing ring 90 realize the connection with the drill head 1, the third sealing ring 92 realizes the connection with the drill tee head 2, and the fourth sealing ring 90 realizes the connection with the shell 3. Its technical purpose is to serve as a component for sealing the connection between the drill head 1 and the drill tee head 2 and the shell 3 respectively.

[0075] In this embodiment, the drill head 1, drill tee head 2, first cutter blade 6, and second cutter blade 7 are arranged with the shell 3, shaft head 4, piston head 5, and return spring 8 in a manner that resembles built-in sliding components. The drill head 1, drill tee head 2, first cutter blade 6, second cutter blade 7, shell 3, shaft head 4, piston head 5, and return spring 8 are arranged with the first sealing ring 9, second sealing ring 91, third sealing ring 92, and fourth sealing ring 90 in a manner that resembles built-in sealing components. The center lines of the drill head 1, drill tee head 2, shell 3, shaft head 4, piston head 5, return spring 8, first sealing ring 9, second sealing ring 91, third sealing ring 92, and fourth sealing ring 90 are all aligned on the same straight line. The rod part I 51 is connected to the shell part II 12, and the rod part II 52 is connected to the shell part II 12.

[0076] In this embodiment, the included angle α between the first blade plate 6 and the second blade plate 7 in the expanded state is set to 158-160°.

[0077] In one of the supporting examples of the first embodiment of this utility model, the included angle α between the first blade plate 6 and the second blade plate 7 in the expanded state is set to 158°.

[0078] In the second supporting example of the first embodiment of this utility model, the included angle α between the first blade plate 6 and the second blade plate 7 in the expanded state is set to 160°.

[0079] In the third supporting example of the first embodiment of this utility model, the included angle α between the first blade plate 6 and the second blade plate 7 in the expanded state is set to 159°.

[0080] The method of use in this embodiment is as follows: connect the cylindrical part I11 to the tapered extended threaded hole of the drill tee head 2, thereby realizing the connection between the drill head 1 and the drill tee head 2.

[0081] When high-pressure water is injected into the drill liner 2, the water is sprayed through the water jet channel 53 towards the cylinder II 12. Due to the limited diameter of the water jet channel 53, a pressure difference is generated in the drill liner 2, causing the rod II 52 to move forward within the cylinder III 31, and the rod I 51 to move forward within the cylinder II 12. When the shaft head 4 is located at the rear end of the receiving hole IV 34, the first cutter wing plate 6 and the second cutter wing plate 7 rotate within the U-shaped groove of the rod II 52. This causes the first cutter wing plate 6 to swing outward from the receiving hole I 32, and the second cutter wing plate 7 to swing outward from the receiving hole II 33, resulting in the first cutter wing plate 6 and the second cutter wing plate 7 being in an expanded state. The first cutter wing plate 6 and the second cutter wing plate 7 then enlarge the hole.

[0082] When no high-pressure water flow is applied to the drill tee 2, under the elastic energy storage of the return spring 8, rod part II 52 moves backward in cylinder part III 31, and rod part I 51 moves backward in cylinder part II 12. When the return spring 8 is in the free initial state, the shaft head 4 is located at the front end of the receiving hole IV 34. The first cutter wing plate 6 and the second cutter wing plate 7 rotate in opposite directions in the U-shaped groove of rod part II 52, causing the first cutter wing plate 6 to swing inward from the receiving hole I 32, so that the first cutter wing plate 6 is located in the receiving hole I 32. The second cutter wing plate 7 swings inward from the receiving hole II 33, so that the second cutter wing plate 7 is located in the receiving hole II 33, so that the first cutter wing plate 6 and the second cutter wing plate 7 are in the closed state.

[0083] In verifying this utility model, the inventors abandoned the existing technical feature of directly mounting the cutter blade to the side of the drill rod. They first proposed a technical feature where the expansion motion is driven by a single transverse impact high-pressure water flow. This resulted in the first unexpected technical effect: enabling the high-pressure water flow to be sprayed transversely, increasing the impact force on the borehole and improving drilling efficiency. The second unexpected technical effect: preventing lateral water jetting and improving the stability of the drill rod movement. The third unexpected technical effect: enabling the piston head 5 to receive the transverse high-pressure water flow impact, increasing the area for receiving the high-pressure water flow. This improved the movement performance of the piston head 5 within the casing 3, enhanced the opening effect of the first cutter blade 6 and the second cutter blade 7, and resulted in a fourth unexpected technical effect: the piston head 5 was guided back to its original position by the casing 3, the shaft head 4, and the return spring 8, and the closing effect of the first cutter blade 6 and the second cutter blade 7 was improved. This resulted in a fifth unexpected technical effect: the casing 3 was sealed with the drill head 1 and the drill tee head 2 by the first sealing ring 9, the second sealing ring 91, and the fourth sealing ring 90, and the drill head 1 and the drill tee head 2 were sealed with the third sealing ring 92, thus improving the sealing performance and the lateral flow performance of the high-pressure water flow.

[0084] In the second embodiment of this utility model, the mechanical water jet body and the reset telescopic assembly are connected to each other in a manner driven by a single transverse impact high-pressure water flow to perform an expansion and contraction motion.

[0085] In this embodiment, the resetting telescopic component is connected to the mechanical water jet body in a manner that drives the lateral movement conversion swing motion.

[0086] In this embodiment, the reset telescopic assembly includes a cylindrical shell 3, a shaft head 4, a piston head 5, and a return spring 8.

[0087] In this embodiment, a first accessory device is also included and disposed between the reset telescopic assembly and the mechanical water jet body. The first accessory device is configured to include a first sealing ring 9, a second sealing ring 91 and a fourth sealing ring 90.

[0088] In this embodiment, a second accessory device is also included and is disposed on the mechanical water jet body. The second accessory device is configured as a third sealing ring 92.

[0089] The second embodiment of this utility model is based on the first embodiment.

[0090] This utility model has the following features:

[0091] 1. Due to the design of the mechanical water jet body and the reset telescopic assembly, the mechanical water jet body realizes the hole enlargement process, and the reset telescopic assembly realizes the lateral movement conversion swing motion drive of the first cutter blade 6 and the second cutter blade 7. It realizes the expansion and contraction motion driven by the single lateral impact high-pressure water flow, which solves the technical problem of directly installing the cutter blades on the side of the drill rod, thus improving the expansion effect of the cutter blades.

[0092] 2. Due to the design of the cylinder shell 3, shaft head 4, piston head 5 and return spring 8, the telescopic cylinder body realizes elastic energy storage as the return force.

[0093] 3. Due to the design of the first sealing ring 9, the second sealing ring 91 and the fourth sealing ring 90, a seal is achieved between the drill head 1, the drill tail head 2 and the shell 3.

[0094] 4. Due to the design of the third sealing ring 92, a seal is achieved between the drill head 1 and the drill tail head 2.

[0095] 5. Because the design limits the numerical range of the structural shape, the numerical range is a technical feature in the technical solution of this utility model, and is not a technical feature obtained by formula calculation or a limited number of experiments. The experiment shows that the technical feature of the numerical range has achieved very good technical effect.

[0096] 6. Due to the design of the technical features of this utility model, and the combined effect of the individual technical features and the combination of the features, experiments have shown that the performance indicators of this utility model are at least 1.7 times that of the existing performance indicators, and it has been evaluated that it has great market value.

[0097] Other technical features connected to the mechanical water jet body and the reset telescopic assembly driven by the single transverse impact high-pressure water flow for expansion and contraction are also embodiments of this utility model. Furthermore, the technical features of the above embodiments can be combined arbitrarily. In order to meet the requirements of the Patent Law, the Patent Implementation Regulations and the Examination Guidelines, all possible combinations of the technical features in the above embodiments will not be described.

[0098] Therefore, in the field of mechanical water jet devices for coal mines, any mechanical water jet body that includes a front drill head 1, a tail drill head 2, a first cutter wing plate 6, and a second cutter wing plate 7, and a reset telescopic assembly disposed between the front drill head 1 and the tail drill head 2 and the first cutter wing plate 6 and the second cutter wing plate 7, is within the protection scope of this utility model.

Claims

1. A mechanical water jet device for coal mines, characterized in that: The mechanical waterjet body includes a front drill head (1), a tail drill head (2), a first cutter blade (6) and a second cutter blade (7), and a reset telescopic assembly is disposed between the front drill head (1) and the tail drill head (2) and the first cutter blade (6) and the second cutter blade (7).

2. The mechanical water jet device for coal mines according to claim 1, characterized in that: The mechanical water jet body and the reset telescopic assembly are connected to each other in a manner driven by a single transverse impact high-pressure water flow to perform expansion and contraction motion.

3. The mechanical water jet device for coal mines according to claim 2, characterized in that: The resetting telescopic component is connected to the mechanical water jet body in a manner that drives the lateral movement conversion swing motion.

4. The mechanical water jet device for coal mines according to claim 1, characterized in that: The reset telescopic assembly includes a cylindrical shell (3), a shaft head (4), a piston head (5), and a return spring (8). Alternatively, it may also include a first accessory device disposed between the reset telescopic assembly and the mechanical water jet body, the first accessory device being configured to include a first sealing ring (9), a second sealing ring (91), and a fourth sealing ring (90). Alternatively, it may also include a second accessory device and the second accessory device is disposed on the mechanical water jet body, the second accessory device being configured as a third sealing ring (92).

5. The mechanical water jet device for coal mines according to claim 4, characterized in that: in A shell (3) is provided between the drill head (1) and the drill tail (2). A first sealing ring (9) and a fourth sealing ring (90) are provided between the drill head (1) and the shell (3), and a second sealing ring (91) is provided between the drill tail (2) and the shell (3). A third sealing ring (92) is provided on the drill head (1), and a piston head (5) is provided in the shell (3). A shaft head (4) is provided between the piston head (5) and the shell (3), and a return spring (8) is provided between the piston head (5) and the drill head (1). A first cutter blade (6) and a second cutter blade (7) are provided on the piston head (5).

6. The mechanical water jet device for coal mines according to claim 5, characterized in that: The drill bit (1) is configured to include a cylindrical part I (11) and a cylindrical part II (12), and a receiving groove (13) is provided on the periphery of the inner contraction body of the cylindrical part II (12). The inner end face of the cylindrical part I (11) is configured to connect with the inner end face of the cylindrical part II (12), and a third sealing ring (92) is provided between the cylindrical part I (11) and the cylindrical part II (12). The rear end expansion hole of the cylindrical part II (12) is configured to be connected to the piston head (5), the return spring (8) and the first sealing ring (9) in a receiving manner. The stepped hole of cylinder II (12) is configured to be connected to the return spring (8) in a contact manner. The inner wall of the rear expansion hole of cylinder II (12) is configured to be connected to the first sealing ring (9) in a receiving manner. The rear contraction body of cylinder II (12) is configured to be connected to the cylinder shell (3) in a threaded manner. The stepped body on the outer periphery side of cylinder II (12) is configured to be connected to the cylinder shell (3) and the fourth sealing ring (90) in a contact manner. Cylinder I (11) is configured to be connected to the adjacent drill nut (2) in a threaded manner. Alternatively, cylindrical part I (11) may be configured as a conical tubular body and cylindrical part II (12) may be configured as a U-shaped tubular body with a convex shape, and receiving trough (13) may be configured as a U-shaped trough and the receiving trough (13) may be configured to be arranged at intervals along the peripheral contour line of cylindrical part II (12). Alternatively, the drill tail (2) is configured as a convex rod-shaped body with a convex hole and the tapered extended threaded hole of the drill tail (2) is configured to be threadedly connected to the adjacent drill head (1), the contraction body of the drill tail (2) is configured to be threadedly connected to the shell (3), and the outer peripheral side step of the drill tail (2) is configured to be contacted with the shell (3).

7. The mechanical water jet device for coal mines according to claim 5, characterized in that: The first blade plate (6) and the second blade plate (7) are respectively configured as P-shaped plates, and the extended inner ends of the first blade plate (6) and the extended inner ends of the second blade plate (7) are respectively connected to the piston head (5) by a pin. The front side of the extended inner end of the first blade plate (6) and the front side of the extended inner end of the second blade plate (7) are respectively connected to the cylinder shell (3) by a pin.

8. The mechanical water jet device for coal mines according to claim 5, characterized in that: in The upper end face of the cylindrical part III (31) of the shell (3) is provided with a receiving hole I (32), and the lower end face of the cylindrical part III (31) is provided with a receiving hole II (33). Receiving holes IV (34) are provided on the front and rear sides of the cylindrical part III (31). The cylindrical part III (31) is configured to be fitted with the piston head (5). The rear end of the inner wall of the cylindrical part III (31) is configured to be fitted with the second sealing ring (91), and the receiving hole I (32) is configured to be fitted with the first blade plate (6). The rear end of the inner wall of the 32) is configured to be connected to the pin end located on the first cutter wing plate (6), and the receiving hole II (33) is configured to be connected to the second cutter wing plate (7). The rear end of the inner wall of the receiving hole II (33) is configured to be connected to the pin end located on the second cutter wing plate (7), and the receiving hole IV (34) is configured to be connected to the shaft head (4). The front port of the cylinder III (31) is configured to be threadedly connected to the drill head (1), and the rear port of the cylinder III (31) is configured to be threadedly connected to the drill tail head (2). Alternatively, the cylindrical part III (31) may be configured as a tubular body, and the accommodating orifice I (32), accommodating orifice II (33), and accommodating orifice IV (34) may be configured as elongated orifice-like bodies. Alternatively, the shaft head (4) may be configured as a rod-shaped body, with its end slidably connected to the cylindrical shell (3), and its middle portion connected through the piston head (5). Alternatively, the piston head (5) is configured to include rod I (51) and rod II (52), and a water jet channel body (53) is provided in rod II (52). The inner end face of rod I (51) is configured to be connected to the middle of the inner end face of rod II (52), and the outer end face of rod I (51) is configured to be connected to the return spring (8). Rod I (51) is configured to be connected to the drill head (1) through the drill bit, and the peripheral side of rod I (51) is configured to be connected to the first... A sealing ring (9) is used for contact connection. The rod part II (52) is configured to be connected to the cylinder shell (3) through the cylinder shell (3), and the outer contraction end of the rod part II (52) is configured to be connected to the second sealing ring (91) through contact. The upper end face of the rod part II (52) is configured to be connected to the first blade plate (6) through a pin, and the lower end face of the rod part II (52) is configured to be connected to the second blade plate (7) through a pin. The middle of the rod part II (52) is configured to be connected to the shaft head (4) in a sleeve-type connection. Alternatively, rod I (51) is configured as a rod-shaped body and rod II (52) is configured as a convex rod-shaped body with a through hole in the middle and U-shaped grooves on the upper and lower end faces. The through hole of rod II (52) is configured to be connected to the shaft head (4), and the U-shaped grooves of rod II (52) are configured to be connected to the first blade plate (6) and the second blade plate (7) respectively via pins. The water spray channel body (53) is configured with one section having a U-shaped hole and the other section having a straight through hole. The port of the U-shaped hole of the water spray channel body (53) is located on the edge of the inner end face of rod II (52), and the port of the straight through hole of the water spray channel body (53) is located on the middle of the outer end face of rod II (52). Alternatively, the return spring (8) may be configured as a cylindrical spring and configured to be submerged in connection with the drill head (1), with one end of the return spring (8) configured to be in contact with the drill head (1) and the other end of the return spring (8) configured to be in contact with the piston head (5). Alternatively, the first sealing ring (9) and the second sealing ring (91) are respectively configured as sealing rings with a U-shaped cross section, and the outer part of the first sealing ring (9) is configured to be embedded and connected to the drill bit (1), the outer part of the second sealing ring (91) is configured to be embedded and connected to the shell (3), and the inner wall of the first sealing ring (9) and the inner wall of the second sealing ring (91) are respectively configured to be in contact with the piston head (5). Alternatively, the third sealing ring (92) and the fourth sealing ring (90) are respectively set as O-shaped sealing rings, and the inner side of the third sealing ring (92) and the inner side of the fourth sealing ring (90) are respectively set to be embedded and connected to the drill head (1), the outer wall of the third sealing ring (92) is set to be connected to the drill tail head (2) in contact, and the outer wall of the fourth sealing ring (90) is set to be connected to the shell (3) in contact.

9. The mechanical water jet device for coal mines according to any one of claims 1 to 8, characterized in that: The drill head (1), drill tee head (2), first cutter blade (6), and second cutter blade (7), along with the shell (3), shaft head (4), piston head (5), and return spring (8), are arranged in a manner that resembles built-in sliding components. Furthermore, the drill head (1), drill tee head (2), first cutter blade (6), second cutter blade (7), shell (3), shaft head (4), piston head (5), and return spring (8), along with the first sealing ring (9), second sealing ring (91), third sealing ring (92), and fourth sealing ring (90), are arranged in a manner that resembles built-in sealing components. Alternatively, the center lines of the drill head (1), drill tail head (2), shell (3), shaft head (4), piston head (5), return spring (8), first sealing ring (9), second sealing ring (91), third sealing ring (92) and fourth sealing ring (90) are set on the same straight line, and rod part I (51) is set to be connected to shell part II (12), and rod part II (52) is set to be connected to shell part II (12).

10. The mechanical water jet device for coal mines according to claim 5, characterized in that: The included angle α between the first blade plate (6) and the second blade plate (7) in the expanded state is set to 158-160°.

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