Air supply and water supply collaborative pipeline structure of drilling and blasting trolley and using method of air supply and water supply collaborative pipeline structure

Abstract

The invention provides a drilling and blasting trolley air supply and water supply cooperation pipeline structure and a using method, and belongs to the technical field of drilling and blasting trolleys, the drilling and blasting trolley air supply and water supply cooperation pipeline structure comprises a coaxial double pipeline, the coaxial double pipeline comprises an air pipe and a water pipe, the air pipe sleeves the outer side of the water pipe, and a connecting flange plate is arranged between the rear end of the air pipe and the rear end of the water pipe; the water pipe is of a three-layer design and comprises an outer pipe, an inner pipe and a middle woven net arranged between the outer pipe and the inner pipe, the outer pipe is made of a carbon fiber reinforced polyurethane elastomer material, the middle woven net is made of a titanium alloy wire material, and the inner pipe is made of a zirconia ceramic matrix composite material. The venturi tube is arranged at the output end of the coaxial dual-channel, the venturi tube is designed to be gradually shrunk and expanded, and the problems that the occupied space of a pipeline on a drilling and blasting trolley is large, the weight of equipment is increased, the pipeline is prone to being wound, and the construction progress is affected are solved.

Description

Technical Field

[0001] This invention belongs to the field of drilling and blasting trolley technology, specifically, it relates to a coordinated air and water supply pipeline structure and its usage method for drilling and blasting trolleys. Background Technology

[0002] Drill-and-blast rigs are the main rock drilling equipment used in tunnel and underground engineering projects employing the drill-and-blast method. They are mobile and can support multiple rock drills simultaneously performing drilling operations. During the drill-and-blast process, a stable supply of air and water is crucial, affecting not only the drilling quality but also the blasting effect and the equipment's lifespan. Traditional drill-and-blast rigs typically use independent air and water supply systems, which present the following problems: (1) Large space occupation: Independent air ducts and water pipes require additional space to be arranged, which increases the overall volume of the equipment; (2) Heavy weight: The dual-system design increases the overall weight of the equipment, affecting its mobility and operational flexibility.

[0003] To address the above two points, a combined air and water supply pipeline structure and usage method for a blasting trolley are designed. Summary of the Invention

[0004] This invention provides a structure and method for using a combined air and water supply pipeline for a drilling and blasting rig, which solves the problems of large space occupation, increased equipment weight, easy tangling of pipelines, and impact on construction progress.

[0005] In view of the above problems, the technical solution proposed by the present invention is: This invention provides a coordinated air and water supply pipeline structure for a drilling and blasting rig, including coaxial double pipes, which include an air duct and a water pipe. The air duct is sleeved on the outside of the water pipe, and a connecting flange is provided between the rear ends of the air duct and the water pipe. The water pipe has a three-layer design, including an outer pipe, an inner pipe, and a middle layer of mesh disposed between the outer pipe and the inner pipe. The outer pipe is made of carbon fiber reinforced polyurethane elastomer, the middle layer of mesh is made of titanium alloy wire, and the inner pipe is made of zirconium oxide ceramic matrix composite material. A venturi tube is located at the output end of a coaxial dual-channel system, and the venturi tube has a tapered and expanded design.

[0006] As a preferred embodiment of the present invention, a gap is provided between the air duct and the water pipe, the gap being a hollow cavity, a support ring is provided inside the hollow cavity, the support ring is sleeved on the outside of the water pipe, the support ring is made of nylon-reinforced polytetrafluoroethylene, the support ring adopts an airfoil profile, and a plurality of guide holes are opened circumferentially on the support ring.

[0007] As a preferred embodiment of the present invention, a protective strip is embedded on the outer surface of the outer tube, and the protective strip is arranged in a spiral on the outer surface of the outer tube. The inner surface of the inner tube is etched with sharkskin-like microgrooves, which are only provided on the straight sections of the water pipe and are offset from the Venturi tube. The middle layer of mesh is made by interlacing titanium alloy wires around the outer surface of the inner tube using a three-dimensional hexagonal braiding machine.

[0008] As a preferred embodiment of the present invention, the Venturi tube is disposed at the output end of the duct. The Venturi tube includes a gradually expanding section and a gradually contracting section. The inner surface of the gradually expanding section is provided with turbulence columns, which are arranged alternately on the inner wall of the gradually expanding section. The turbulence columns are made of tungsten carbide hard alloy.

[0009] As a preferred embodiment of the present invention, the output end of the water pipe is provided with an extension section, the extension section extends into the Venturi tube, the shape of the extension section is adapted to the Venturi tube, the surface of the extension section is radially provided with water suction holes, the middle section of the water pipe adopts a corrugated tube design, and both the corrugated tube and the extension section are welded to the water pipe.

[0010] As a preferred embodiment of the present invention, the self-sealing connector includes a connector, a fastening nut, a disc spring assembly, and an anti-reverse assembly. The connector is threadedly engaged with the connecting flange. The disc spring assembly is disposed inside the fastening nut, and the anti-reverse assembly is disposed at the rear end of the connector.

[0011] As a preferred embodiment of the present invention, the connector is designed with inner and outer double conical surfaces, wherein the inner conical surface is embedded with a fluororubber ring and the outer conical surface is made of hardened metal. The axial section of the connector is conical and the radial plane is circular, with the inner and outer conical surfaces coaxially nested.

[0012] On the other hand, a method for using a drilling and blasting trolley's coordinated air and water supply pipeline structure includes the following steps: S1, connect the input end of the water pipe to the water pump, set the self-sealing connector outside the input end of the air pipe to connect the blower, and connect the air pipe and the water pipe to the corresponding interface of the drilling and blasting trolley according to the design requirements; S2. Before starting the drilling and blasting trolley, inspect the pipeline and observe whether there is any air or water leakage at the connection between the air duct and the water pipe. S3, start the blower to blow out impurities in the pipe for pre-ventilation, and turn on the water pump to gradually pressurize. The water flows through the water pipe into the extension section of the Venturi tube for atomization. The water mist is sprayed out through the Venturi tube to reduce dust and cool the drilling work of the drilling and blasting trolley. S4. According to the working requirements of the drilling and blasting trolley, adjust the pressure of the air pipe and the water pipe on the operating platform of the drilling and blasting trolley to ensure that the air pressure and water pressure reach a suitable range. S5. During the operation of the drilling and blasting trolley, regularly check the operation of the pipeline, including air pressure, water pressure, and the sealing of pipeline connections. If any abnormalities are found, deal with them in a timely manner. S6. After the drilling and blasting trolley operation is completed, close the valves of the pipeline and ensure that the pressure in all pipelines is completely released before disassembling and maintaining the pipeline.

[0013] Compared with the prior art, the beneficial effects of the present invention are: (1) The present invention combines the air duct and water pipe through a coaxial double pipe design. The air duct is sleeved on the outside of the water pipe, and a hollow cavity with a constant cross section is maintained between the two. This design is not only compact and space-saving, but also reduces the energy loss of airflow around the support ring through the design of the flow guide hole, thereby improving the airflow transmission efficiency. (2) The present invention uses a three-layer water pipe design, with each layer made of different materials to improve impact resistance, reduce frictional resistance and enhance wear resistance; (3) The present invention achieves efficient water-air mixing and atomization effect through the application of the venturi tube efficient atomization design, the gradually shrinking and expanding structure and the turbulence column. This design not only improves the dust reduction and cooling effect, but also improves the water-air mixing effect.

[0014] In summary, this invention effectively solves the problems of large space occupation and heavy weight of the air and water supply pipelines of the drilling and blasting trolley through innovative improvements to these pipelines.

[0015] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, and in order to make the above and other objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention are described below. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the air and water supply coordinated pipeline structure of the drilling and blasting rig disclosed in this invention on the operating platform of the drilling and blasting rig. Figure 2 This is a schematic diagram of the overall structure of a drilling and blasting rig's coordinated air and water supply pipeline structure disclosed in this invention. Figure 3 This is a cross-sectional schematic diagram of a coaxial double pipeline structure for a drilling and blasting rig's air and water supply coordinated pipeline structure disclosed in this invention. Figure 4 This is an enlarged view of part A of the cross-sectional structure of a coaxial double pipeline for air and water supply coordination of a drilling and blasting trolley disclosed in this invention. Figure 5 This is a schematic diagram of the water pipe disassembly structure of a drilling and blasting rig's air and water supply coordinated pipeline structure disclosed in this invention. Figure 6 This is a schematic diagram of the disassembly structure of a self-sealing connector of a drilling and blasting rig's air and water supply coordinated pipeline structure disclosed in this invention. Figure 7 This is an enlarged structural diagram of part B of the disassembly structure diagram of the self-sealing connector of the air and water supply pipeline structure of the drilling and blasting trolley disclosed in this invention. Figure 8 This is a flowchart illustrating the usage method of a drilling and blasting trolley air and water supply coordinated pipeline structure disclosed in this invention. Explanation of reference numerals in the attached drawings: 10. Air duct; 11. Hollow cavity; 12. Connecting flange; 20. Water pipe; 201. Outer pipe; 202. Inner pipe; 203. Middle layer mesh; 204. Protective strip; 205. Microgrooved design resembling sharkskin; 21. Corrugated pipe; 22. Extension section; 221. Clamp; 23. Support ring; 30. Self-sealing connector; 31. Connector; 32. Fastening nut; 33. Disc spring assembly; 34. Anti-reverse assembly; 341. Ratchet ring; 342. Pawl; 343. Mounting post; 344. Baffle; 345. Limit spring; 40. Venturi tube; 41. Diverging section; 42. Contracting section; 43. Turbulence column; 50. Drilling and blasting trolley operating platform. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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 a part of the embodiments of the present invention, and not all of them. 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.

[0018] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0019] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0020] 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 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 limitations on this invention.

[0021] 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0022] Example 1:

[0023] See attached document Figure 1-7As shown, this invention provides a technical solution: a coordinated air and water supply pipeline structure for a drilling and blasting trolley, comprising coaxial double pipes, including an air duct 10 and a water pipe 20. The air duct 10 is made of conventional high-strength aluminum alloy. The gap (i.e., hollow cavity 11) between the water pipe 20 and the air duct 10 maintains a constant cross-section. The air duct 10 is wrapped with an electric heating tape for anti-freezing treatment. In actual engineering, the power of the electric heating tape needs to be adjusted according to on-site parameters such as the length of the air duct, the thickness of the insulation layer, and the wind speed. The air duct 10 is sleeved on the outside of the water pipe 20. A connecting flange 12 is provided between the rear ends of the air duct 10 and the water pipe 20. A branch pipe is opened on the outside of the air duct 10. The branch pipe is connected in parallel with the air duct 10 through an electric ball valve for dynamic compensation of pressure fluctuations. The branch pipe is opened at the atomization reaction point between the venturi tube 40 and the extension section 22, i.e., the atomization section. The inner diameter of the branch pipe is [missing information - likely a percentage] of the inner diameter of the branch pipe. 30%, ensuring that the branch pipe air volume is ≤30% of the total air volume. When the air pressure drops suddenly due to water absorption in the atomizing section, a piezoelectric pressure sensor is installed in the gradually expanding section 41 of the Venturi tube 40 (i.e., the part after the atomizing section) to monitor the air pressure in real time. A PLC controller is set up to receive the air pressure signal, dynamically adjust the valve opening of the proportional regulating valve according to the pressure deviation, and set the target pressure according to the actual situation. When the air pressure exceeds the set target pressure, the proportional regulating valve of the branch is triggered to increase the valve opening, and the air volume of the branch is injected into the downstream pipeline or directly discharged to restore the total air pressure to the target pressure. A flow meter is installed at the inlet of the branch to monitor the air volume of the branch. The real-time monitoring data is transmitted to the controller on the drilling and blasting trolley. The negative pressure suction of the atomizing section is enhanced - the pressure drop of the air duct 10 increases - the sensor triggers the PID to increase the valve opening - the air volume of the branch increases. The water pipe 20 has a three-layer design, including an outer pipe 201, an inner pipe 202, and a middle layer mesh 203 set between the outer pipe 201 and the inner pipe 202. The outer pipe 201 is made of carbon fiber reinforced polyurethane elastomer, the middle layer mesh 203 is made of titanium alloy wire, and the inner pipe 202 is made of zirconium oxide ceramic matrix composite material. Compared with the traditional double pipe parallel structure, the coaxial nested design reduces the radial space occupied. Venturi tube 40 is located at the output end of the coaxial dual channel. Venturi tube 40 has a tapered and expanded design. The self-sealing connector 30 is located at the rear end of the coaxial double pipe.

[0024] The embodiments of the present invention are also implemented through the following technical solutions.

[0025] In an embodiment of the present invention, a gap is provided between the air duct 10 and the water pipe 20, the gap being a hollow cavity 11. A support ring 23 is provided inside the hollow cavity 11, and the support ring 23 is sleeved on the outside of the water pipe 20. The support ring 23 is made of nylon-reinforced polytetrafluoroethylene and adopts an airfoil profile with a sharp front end and a smooth transition at the rear end. Several guide holes are opened around the support ring 23 to allow airflow to pass directly through, reducing the loss of energy around the flow and shifting the airflow separation point backward. The gap between the outer diameter of the support ring 23 and the inner diameter of the air duct 10 is 0.1-0.2 mm. The support ring 23 only contacts the inner wall of the air duct 10 at the middle arc position, and the support ring 23 has a built-in disc spring assembly 33, that is, the support ring 23 is wrapped around the outside of the disc spring assembly 33. When the water pipe 20 is subjected to vibration and impact, the spring is compressed to absorb energy, allowing the support ring 23 to float radially and avoiding rigid collisions.

[0026] In an embodiment of the present invention, a protective strip 204 is embedded on the outer surface of the outer tube 201. The protective strip 204 is made of shape memory alloy wire, such as nickel-titanium alloy wire. The protective strip 204 is covered with microporous aerogel for heat insulation (thermal conductivity 0.02 W / m·K), which increases the phase change critical temperature of the shape memory alloy wire. At the same time, a temperature sensor is added to the inner wall of the air duct 10. When the temperature sensor detects that the air duct 10 is in a temperature range, temperature control is performed. For example, when the temperature is >60°C, the water flow rate is increased by 20% to enhance cooling. When the temperature is >90°C, a shutdown protection is triggered to avoid sudden changes in stiffness caused by accidental phase change of the alloy. The protective strip 204 is spiral on the outer surface of the outer tube 201. The outer tube 201 is injection molded and wrapped with a titanium alloy braided mesh. When the outer tube 201 is impacted, causing local deformation, the shape memory alloy wires undergo a martensitic phase transformation induced by stress, resulting in an instantaneous increase in stiffness. The inner surface of the inner tube 202 is etched with sharkskin-like microgrooves 205. These microgrooves 205 are only etched in the straight section to avoid the Venturi tube 40 area and prevent collisions. (The reason is that the flow velocity changes drastically from the tapered section 42 to the expanding section 41 of the Venturi tube 40. The grooves in the variable cross-section area will induce turbulent boundary layer separation, increasing local pressure loss. The zirconia ceramic inner tube 202 is subjected to higher fluid shear forces in the Venturi tube's variable diameter area. Etching the grooves would weaken the matrix strength.) (This can easily lead to stress concentration cracks). The sharkskin-like microgrooves 205 are spirally arranged to reduce frictional resistance by lowering the near-wall fluid shear force. A zirconia ceramic layer is plasma-sprayed, followed by ultraviolet laser etching of the grooves. The zirconia ceramic matrix composite material of the inner tube 202 uses a metal pipe as the substrate and selects zirconia powder (but attention should be paid to the difference in thermal expansion coefficients between the metal substrate and zirconia, which can be mitigated by preheating before spraying and vacuum hot pressing). Zirconia powder is sprayed onto the outer surface of the substrate pipe using plasma spraying equipment. The substrate pipe is preheated before spraying. The middle layer mesh 203 uses a three-dimensional hexagonal braiding machine to interlacedly wind titanium alloy wires around the inner tube 2. The outer surface of 02 forms a mesh structure. The titanium alloy wire has a diameter of 0.2mm and is wound in an alternating ±45° angle using a three-dimensional hexagonal braiding machine. The braiding density is 60 meshes, and the vacuum hot pressing temperature is set at 400±20℃. This temperature range ensures that the yield strength of the titanium alloy wire is reduced to 120MPa (lower than the shear strength of aramid fiber 150MPa), avoiding damage to the braided mesh. Aramid fiber is filled between the middle layer mesh 203 and the inner tube 202 to buffer the impact. When an external impact is transmitted to the inner tube, the force is dispersed by the titanium alloy mesh, and the remaining stress is absorbed by the shear deformation of the aramid fiber, which reduces the pressure on the ceramic matrix, reduces the force on the ceramic, and prevents it from breaking and cracking.

[0027] Specifically, zirconium oxide powder is sprayed onto the metal pipe of the inner tube 202, and grooves are etched on the inner wall using an ultraviolet laser. The detailed parameters of the laser and the grooves are set according to the actual implementation (e.g., groove depth is 20%-30% of the boundary layer thickness (approximately 50-80 μm), width is 100-150 μm, and helix angle is 25°-35°). Then, a three-dimensional hexagonal braiding machine is used, with a hot pressing temperature of 400±20℃, to interlacedly wind titanium alloy wires onto the outer surface of the inner layer to form a mesh structure. Vacuum hot pressing is then performed to make the mesh fit more closely to the inner tube 202. The inner tube 202 with the mesh already set is then placed into a mold, and liquid polyurethane prepolymer is injected into the mold for further processing. Vacuum degassing and temperature curing form a uniform elastic outer tube 201. Before liquid injection, the stretched shape memory alloy wires are wound around the outer surface of the mesh in a spiral trajectory. When the liquid is injected, polyurethane penetrates into the gaps between the shape memory alloy wires. When the tube is subjected to external impact, the elastomer deforms and compresses the shape memory alloy wires, triggering their phase transformation hardening and forming a localized reinforced area. Polyurethane penetrates into the mesh pores and the gaps between the shape memory alloy wires, forming a barbed structure after curing. The laser-etched microgrooves of the ceramic layer reduce shear resistance and reduce turbulent energy loss by inducing spiral laminar flow of the fluid near the wall. Moreover, when the impact is removed, the shape memory alloy automatically recovers its stiffness at an ambient temperature below 40°C, returning to its initial value.

[0028] In an embodiment of the present invention, a venturi tube 40 is disposed at the output end of the duct 10. The venturi tube 40 includes a converging section 42 (inlet), a throat, and a diverging section 41 (outlet). The airflow direction is converging section 42 (inlet) → throat → diverging section 41 (outlet). A turbulence column 43 is disposed on the inner surface of the diverging section 41. The turbulence column 43 is arranged alternately on the inner wall of the diverging section 41. The alternating turbulence column 43 induces horseshoe vortices on the inner wall of the diverging section 41. Its function is to destroy the laminar boundary layer, extend the gas-liquid mixing path, and the vortex shear force makes the initially broken droplets further refined, reducing the droplet size to 30%-50% of the original size. The turbulence column 43 is made of tungsten carbide hard alloy and coated with diamond-like carbon to resist high-speed droplet erosion. The Vickers hardness is ≥2000HV.

[0029] Specifically, the high-speed airflow accelerates in the converging section 42, creating a negative pressure zone in the throat based on the Bernoulli effect, drawing in water flow in the extension section 22. The droplets are initially broken up under gas-phase shear force. Upon entering the expanding section 41, the flow velocity drops sharply, and the velocity difference between the gas and liquid phases induces turbulent vortices. A turbulence column 43 is positioned 20-50 mm downstream of the throat (flow velocity 60-80 m / s), where the gas-liquid shear force is at its maximum, efficiently enabling secondary droplet breakage. This ratio needs to be determined through simulation, such as verification using CFD fluid simulation (Reynolds number Re = 5 × 10⁻⁶). 5With a turbulence intensity of 10%, the pressure recovery efficiency reaches 92% when the length ratio is 4.2, and the median droplet size D50 is ≤15μm, ensuring sufficient mixing time.

[0030] Furthermore, the tapering and expanding design of the Venturi tube 40 is based on fluid mechanics. When the cross-sectional area of ​​the fluid decreases in the tapering section 42, according to the continuity equation, the flow velocity increases and the pressure decreases. According to Bernoulli's equation, the increase in flow velocity leads to a decrease in pressure, forming a negative pressure zone. The negative pressure zone draws water through the suction hole of the water pipe 20. The water flow is sheared and broken into droplets by the high-speed airflow. In the expanding section 41, the airflow velocity decreases, and the water droplets and airflow are fully mixed to form a uniform water mist. During the acceleration of the fluid in the tapering section 42 and the deceleration in the expanding section 41, pressure and velocity changes will occur. The length of the expanding section 41 directly affects the mixing efficiency and pressure recovery of the fluid. If the length of the expanding section is too short, the fluid will not mix sufficiently, affecting the atomization effect. If the length of the expanding section is too long, it will increase energy loss and reduce system efficiency.

[0031] In an embodiment of the present invention, the output end of the water pipe 20 is provided with an extension section 22, which is located inside the venturi tube 40. The end of the extension section 22 terminates 50mm upstream of the inlet of the tapered section 42, allowing for negative pressure suction to avoid the lowest pressure point. The shape of the extension section 22 is adapted to the venturi tube 40, and several suction holes are radially opened on the surface of the extension section 22. Water flow is suctioned using the negative pressure of the tapered section 42. A cleaning filter screen (0.5mm aperture) is added inside the suction holes to prevent silt blockage. A clamp 221 is provided between the starting end of the venturi tube 40 and the extension pipe. Here, the airflow has been accelerated, the flow velocity is evenly distributed, and the disturbance is minimized. The upper part of the clamp 221... The end is provided with a protrusion, which is bolted to the inner wall of the air duct 10. The lateral displacement of the extension section 22 is restricted by the clamp 221. The height of the protrusion accounts for 3% of the inner diameter of the air duct 10. The front end of the protrusion is a streamlined wing surface and the rear end is tapered. The middle section of the water pipe 20 adopts a corrugated pipe 21 design to absorb high-frequency pressure pulsation and compensate for thermal deformation. Both the corrugated pipe 21 and the extension section 22 are welded to the water pipe 20. The inner tube and middle braided mesh of the corrugated pipe 21 have the same structure as the water pipe 20. The outer layer of the corrugated pipe 21 uses the same carbon fiber reinforced polyurethane material as the outer tube 201 of the water pipe 20 to maintain the consistency of thermal expansion. The corrugated part of the corrugated pipe 21 provides axial elasticity.

[0032] In an embodiment of the present invention, the self-sealing connector 30 includes a connector 31, a fastening nut 32, a disc spring assembly 33, and an anti-reverse component 34. The connector 31 is threadedly engaged with the connecting flange 12. The disc spring assembly 33 is disposed inside the fastening nut 32, between the fastening nut 32 and the connector 31. The disc spring assembly 33 is welded together from several disc springs. The length of the disc spring assembly 33 is adapted to the length of the fastening nut 32. Initial sealing pressure is generated by pre-compressing the springs through the fastening nut 32, and initial pre-tightening force is applied through the disc spring assembly 33. The stiffness of the disc spring assembly 33 needs to be selected to avoid resonance induced by water flow pulsation. When the pipeline vibrates, the vibration energy... The vibration energy is converted into axial periodic pressure fluctuations. The disc spring assembly 33 absorbs the vibration energy through elastic deformation to maintain the pressure stability of the sealing surface. The anti-reverse assembly 34 is located at the rear end of the connector 31. The anti-reverse assembly 34 includes a ratchet ring 341 and a pawl 342. The ratchet ring 341 is welded to the rear end of the connector 31. The pawl 342 is hinged to the inner wall of the fastening nut 32 through the mounting post 343. A limiting spring 345 is provided between the pawl 342 and the ratchet ring 341. One end of the limiting spring 345 abuts against the back of the pawl 342, and the other end is fixed to the baffle 344 that is vertically installed on the inner wall of the fastening nut 32. When vibration causes the thread to loosen, the pawl 342 slides along the helical teeth to lock and prevent reverse rotation.

[0033] In an embodiment of the present invention, the connector 31 has an inner and outer double conical surface design. The inner conical surface is embedded with a fluororubber ring, and the outer conical surface is made of hardened metal. The axial section of the connector 31 is conical (i.e., the cross-section along the axial direction is V-shaped), while the radial plane is circular. The inner and outer conical surfaces are coaxially nested. By tightening the fastening nut 32, an axial thrust is generated, which forces the inner and outer conical surfaces to press against the fluororubber ring. The conical surface fit provides radial self-centering capability, ensuring uniform pressure on the sealing surface during vibration.

[0034] Specifically, an axial force is applied by a disc spring, causing the inner and outer conical surfaces to press against the fluororubber ring. During vibration, the axial micro-movement of the joint converts the vibration energy into the periodic compression and release of the disc spring, forcing the conical surfaces to further engage. The inner and outer conical surfaces generate high-frequency micro-amplitude relative motion during vibration. The elastic deformation of the disc spring assembly 33 compensates for the axial vibration displacement. The disc spring assembly 33 provides a continuous axial preload to compensate for the stress relaxation of the fluororubber ring. The conical surface angle is designed to be 15°, so that the vibration energy is converted into an increase in radial pressing force. At the same time, the elastic restoring force of the fluororubber and the vibration energy form a dynamic balance, ensuring that the pressure on the sealing surface is evenly distributed.

[0035] In summary, all the specific parameters and data involved have been adjusted according to the actual construction situation to adapt to the site requirements and ensure the stable use of air and water supply pipelines.

[0036] Example 2:

[0037] See attached document Figure 8As shown in the embodiment of the present invention, a method for using a drilling and blasting trolley air and water supply coordinated pipeline structure includes the following steps: S1. Install support rings 23 at equal intervals on the outside of water pipe 20. The radial gap between the outer diameter of support ring 23 and the inner diameter of air duct 10 is 0.1-0.2mm, forming a floating gap. Sleeve air duct 10 over the outside of water pipe 20 and connect the rear end of water pipe 20 to the rear end of air duct 10 with connecting flange 12. Use a laser alignment instrument to ensure that water pipe 20 and air duct 10 are coaxial, with a coaxiality error ≤0.02-0.05mm. Align the input end of venturi tube 40 with the output end of the coaxial double tube. Use titanium alloy clamps 22 on the outside. 1. Tighten the water pipe 20 by connecting the input end of the water pipe 20 to the water pump through the self-sealing connector 30, tighten the fastening nut 32 to the preset torque value (e.g., 20 N·m), trigger the compression of the disc spring assembly 33, and confirm the anti-reverse lock effect by the meshing sound of the pawl 342 and the ratchet ring 341. Set the self-sealing connector 30 on the outside of the input end of the air pipe 10 to connect the blower. Connect the air pipe 10 and the water pipe 20 to the corresponding interface of the drilling and blasting trolley according to the design requirements, and ensure that all connections are sealed with the self-sealing connector 30 to prevent air and water leakage. S2. Before starting the drilling and blasting trolley, inspect the pipeline, including checking whether all pipeline connections are secure, whether the self-sealing connector 30 is installed correctly, and ensuring that all valves are closed. Open the valve on the water pipe 20 to ensure that water can flow smoothly into the venturi tube 40. Check whether the suction hole on the extension section 22 is unobstructed to ensure that the water flow can be effectively drawn by the negative pressure of the venturi tube 40. Observe whether there is any air or water leakage at the connection between the air duct 10 and the water pipe 20. S3, start the blower to blow out the impurities in the pipe for pre-ventilation. After the water pump is turned on, the water flows through the water suction hole of the extension section 22 and is sucked by the negative pressure of the throat of the venturi tube 40 to form a gas-liquid mixture atomization. The water mist is sprayed out through the venturi tube 40 to treat the drilling work of the drilling and blasting trolley for dust reduction and cooling. S4. According to the working requirements of the drilling and blasting trolley, adjust the pressure of air pipe 10 and water pipe 20 on the operating platform of the drilling and blasting trolley to ensure that the air pressure and water pressure reach the appropriate range. The target air pressure can be set through the drilling and blasting trolley controller, and the PLC controller will automatically adjust the opening of the branch pipe valve. S5. During the operation of the drilling and blasting trolley, regularly check the operating status of the pipeline, including air pressure, water pressure, and the sealing of pipeline connections. If any abnormalities are found, deal with them in a timely manner. S6. After the drilling and blasting trolley operation is completed, close the valves of the pipeline to ensure that the pressure in all pipelines is completely released. Allow it to cool naturally to below 40°C, or cool it gradually at a rate of ≤5°C / min to release the residual stress of the protective strip 204 and avoid sudden changes in the phase transformation state. Finally, disassemble and maintain the pipeline.

[0038] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

[0039] It should be understood that the specific order or hierarchy of steps in the disclosed process is an example of an exemplary method. Based on design preferences, it should be understood that the specific order or hierarchy of steps in the process may be rearranged without departing from the scope of this disclosure. The appended method claims provide elements of various steps in an exemplary order and are not intended to limit the scope to the specific order or hierarchy described.

[0040] In the detailed description above, various features are combined together in a single embodiment to simplify this disclosure. This approach to disclosure should not be construed as reflecting an intention that embodiments of the claimed subject matter require more features than are explicitly stated in each claim. Rather, as reflected in the appended claims, the invention is presented with fewer features than all of the features in a single disclosed embodiment. Therefore, the appended claims are hereby explicitly incorporated into the detailed description, with each claim representing a separate preferred embodiment of the invention.

[0041] Those skilled in the art will also understand that the various illustrative logic blocks, modules, circuits, and algorithm steps described in conjunction with the embodiments herein can be implemented as electronic hardware, computer software, or a combination thereof. To clearly illustrate the interchangeability between hardware and software, the various illustrative components, blocks, modules, circuits, and steps described above are generally described in terms of their functionality. Whether such functionality is implemented as hardware or software depends on the specific application and the design constraints imposed on the overall system. Those skilled in the art can implement the described functionality in alternative ways for each specific application; however, such implementation decisions should not be construed as departing from the scope of this disclosure.

[0042] The steps of the methods or algorithms described in conjunction with the embodiments herein can be directly embodied in hardware, software modules executed by a processor, or a combination thereof. The software modules can reside in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disks, removable disks, CD-ROMs, or any other form of storage medium well known in the art. An exemplary storage medium is connected to the processor, enabling the processor to read information from and write information to the storage medium. Of course, the storage medium can also be a component of the processor. The processor and storage medium can reside in an ASIC. The ASIC can reside in a user terminal. Alternatively, the processor and storage medium can exist as discrete components in the user terminal.

[0043] For software implementation, the techniques described in this application can be implemented using modules (e.g., procedures, functions, etc.) that perform the functions described in this application. This software code can be stored in memory units and executed by a processor. The memory units can be implemented within the processor or outside the processor; in the latter case, they are communicatively coupled to the processor via various means, as is well known in the art.

[0044] The foregoing description includes examples of one or more embodiments. It is certainly impossible to describe all possible combinations of components or methods in order to describe the above embodiments, but those skilled in the art will recognize that further combinations and arrangements of the various embodiments are possible. Therefore, the embodiments described herein are intended to cover all such changes, modifications, and variations that fall within the scope of the appended claims. Furthermore, the term "comprising" as used in the specification or claims is interpreted in a manner similar to the term "including," as interpreted when used as a conjunction in the claims. Additionally, the use of any term "or" in the specification of the claims is intended to mean "non-exclusive or."

Claims

1. A coordinated air and water supply pipeline structure for a drilling and blasting trolley, characterized in that, It includes a coaxial double pipe, which includes an air duct (10) and a water pipe (20). The air duct (10) is sleeved on the outside of the water pipe (20), and a connecting flange (12) is provided between the rear ends of the air duct (10) and the water pipe (20). The water pipe (20) is a three-layer design, including an outer pipe (201), an inner pipe (202) and a middle layer mesh (203) disposed between the outer pipe (201) and the inner pipe (202). The outer pipe (201) is made of carbon fiber reinforced polyurethane elastomer, the middle layer mesh (203) is made of titanium alloy wire, and the inner pipe (202) is made of zirconium oxide ceramic matrix composite material. Venturi tube (40), the Venturi tube (40) is set at the output end of the coaxial dual channel, the Venturi tube (40) is a tapered and expanded design; A self-sealing connector (30) is provided at the rear end of a coaxial double pipe.

2. The coordinated air and water supply pipeline structure for a drilling and blasting trolley according to claim 1, characterized in that, A gap is provided between the air duct (10) and the water pipe (20), the gap being a hollow cavity (11). A support ring (23) is provided inside the hollow cavity (11). The support ring (23) is sleeved on the outside of the water pipe (20). The support ring (23) is made of nylon-reinforced polytetrafluoroethylene. The support ring (23) adopts an airfoil profile. Several guide holes are opened around the support ring (23).

3. The coordinated air and water supply pipeline structure for a drilling and blasting trolley according to claim 2, characterized in that, The outer surface of the outer tube (201) is embedded with a protective strip (204), which is arranged in a spiral on the outer surface of the outer tube (201). The inner surface of the inner tube (202) is etched with sharkskin-like microgrooves (205). The sharkskin-like microgrooves (205) are only set in the straight section of the water pipe (20) and are offset from the Venturi tube (40). The middle layer mesh (203) is made by interlacing titanium alloy wires around the outer surface of the inner tube (202) using a three-dimensional hexagonal braiding machine.

4. The coordinated air and water supply pipeline structure for a drilling and blasting trolley according to claim 3, characterized in that, The Venturi tube (40) is located at the output end of the air duct (10). The Venturi tube (40) includes a gradually expanding section (41) and a gradually contracting section (42). The inner surface of the gradually expanding section (41) is provided with turbulence columns (43). The turbulence columns (43) are arranged alternately on the inner wall of the gradually expanding section (41). The turbulence columns (43) are made of tungsten carbide hard alloy.

5. The coordinated air and water supply pipeline structure for a drilling and blasting trolley according to claim 4, characterized in that, The water pipe (20) has an extension section (22) at its output end. The extension section (22) extends into the venturi tube (40). The shape of the extension section (22) is adapted to the venturi tube (40). Water suction holes are radially opened on the surface of the extension section (22). The middle section of the water pipe (20) is designed with a corrugated pipe (21). Both the corrugated pipe (21) and the extension section (22) are welded to the water pipe (20).

6. The coordinated air and water supply pipeline structure for a drilling and blasting trolley according to claim 5, characterized in that, The self-sealing connector (30) includes a connector (31), a fastening nut (32), a disc spring assembly (33), and an anti-reverse assembly (34). The connector (31) is threadedly engaged with the connecting flange (12). The disc spring assembly (33) is located inside the fastening nut (32), and the anti-reverse assembly (34) is located at the rear end of the connector (31).

7. The coordinated air and water supply pipeline structure for a drilling and blasting trolley according to claim 6, characterized in that, The connector (31) is designed with inner and outer double conical surfaces. The inner conical surface is embedded with a fluororubber ring, and the outer conical surface is made of hardened metal. The axial section of the connector (31) is conical, and the radial plane is circular. The inner and outer conical surfaces are coaxially nested.

8. A method of using a drilling and blasting rig's coordinated air and water supply pipeline structure, applied to any one of claims 1 to 7, characterized in that, Includes the following steps: S1, connect the input end of the water pipe (20) to the water pump, set the self-sealing connector (30) outside the input end of the air pipe (10) to connect the blower, and connect the air pipe (10) and the water pipe (20) to the corresponding interface of the drilling and blasting trolley according to the design requirements; S2. Before starting the drilling and blasting trolley, check the pipeline and observe whether there is any air or water leakage at the connection between the air duct (10) and the water pipe (20). S3, start the blower to blow out the impurities in the pipe for pre-ventilation, and turn on the water pump to gradually increase the pressure. The water flows through the water pipe (20) into the extension section (22) area of ​​the Venturi tube (40) for atomization. Water mist is sprayed out through the Venturi tube (40) to reduce dust and cool down the drilling work of the drilling and blasting trolley. S4. According to the working requirements of the drilling and blasting trolley, adjust the pressure of the air pipe (10) and the water pipe (20) on the operating platform of the drilling and blasting trolley to ensure that the air pressure and water pressure reach a suitable range. S5. During the operation of the drilling and blasting trolley, regularly check the operation of the pipeline, including air pressure, water pressure, and the sealing of pipeline connections. If any abnormalities are found, deal with them in a timely manner. S6. After the drilling and blasting trolley operation is completed, close the valves of the pipeline and ensure that the pressure in all pipelines is completely released before disassembling and maintaining the pipeline.

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