Pneumatic ammonium nitrate fuel oil explosive conveying on-site mixing and loading truck with long telescopic arm and intelligent hole searching function

Abstract

The invention relates to an ammonium nitrate fuel oil explosive on-site mixing and loading truck, in particular to a pneumatic ammonium nitrate fuel oil explosive conveying on-site mixing and loading truck with a long telescopic arm and intelligent hole searching, which comprises a frame, a material box, the telescopic arm, a hose, a conveyor and a fuel tank, one end of the hose is connected with the conveyor, the other end of the hose is provided with a rotational flow taper pipe, and the rotational flow taper pipe is connected with a static mixing device; when the telescopic arm intelligently finds a blast hole, porous granular ammonium nitrate in the material box is conveyed to the conveyor, and the conveyor pneumatically conveys the porous granular ammonium nitrate to the rotational flow taper pipe through the hose to be subjected to rotational flow primary mixing with fuel conveyed by the fuel tank. Then the explosive is input into the blast hole after being repeatedly crossed and mixed by the static mixing device, so that the mixing uniformity of the explosive is improved; meanwhile, the two conveyors can achieve pneumatic continuous conveying operation of the ammonium nitrate fuel oil explosives, the operation efficiency is improved, intelligent remote control operation with few people is achieved, the explosive loading radiation radius is large, and the requirements of various types of operation can be met.

Description

Technical Field

[0001] The invention relates to an on-site mixing and loading vehicle for ammonium oil-fuel explosives. Background Art

[0002] At present, the on-site mixed explosive production system mainly consists of two parts: an explosive mixing vehicle and a supporting ground station. It integrates raw material transportation, on-site mixing of explosives and mechanized charging. Compared with commercial explosives, it has the advantages of high efficiency, good quality, advanced technology, safety and reliability. The system does not produce finished explosives during the entire processing and transportation process from raw material ground station storage, semi-finished product production to on-site mixing. Therefore, the unsafe factors in the production, packaging, transportation, storage and filling of packaged explosives are eliminated, and there is no pollution to the environment. The essential safety of explosive production and blasting construction is truly realized, and it has been used more and more widely. However, the existing explosive mixing vehicles have defects such as high labor intensity (blasting steps with poor working conditions require manual carrying of explosives to the vicinity of the blasthole), low degree of automation, small charging radiation radius (mechanical spiral swing arm is about 4 meters to 5 meters), long explosive transportation time, and uneven explosive mixing. Not only is the operation efficiency low, but it also affects the blasting effect. Summary of the invention

[0003] In view of the above technical problems, the present invention provides a pneumatic conveying ANFO explosive on-site mixing vehicle with a long telescopic arm and intelligent hole finding, which has high operating efficiency and good blasting effect.

[0004] The technical solution adopted by the present invention to solve the above technical problems is: a pneumatic conveying ammonium nitrate oil explosive on-site mixing vehicle with a long telescopic arm and intelligent hole-finding, which includes a frame, a material box arranged on the frame and a telescopic arm located on the upper side of the material box, a hose is installed on the telescopic arm, a conveyor is provided on the front side of the material box, and a fuel tank is provided on the rear side, one end of the hose is connected to the conveyor, and a swirl cone is installed on the other end, and the swirl cone is connected to a static mixing device; when a control device arranged at the rear of the frame controls the telescopic arm to intelligently find a blasthole, the porous granular ammonium nitrate in the material box is transported to the conveyor, and the conveyor pneumatically transports the porous granular ammonium nitrate to the swirl cone through the hose to perform swirl initial mixing with the fuel transported by the fuel tank, and the materials after the initial mixing are repeatedly cross-mixed into explosives through the static mixing device and then input into the blasthole.

[0005] Preferably, the upper end diameter of the swirl cone tube is large and the lower end diameter is small. One side of the upper end of the swirl cone tube is connected to the end of the hose, and the other side of the upper end of the swirl cone tube is connected to the fuel tank through a fuel pipe. The pneumatically transported porous granular ammonium nitrate generates a swirl in the inner cavity of the swirl cone tube and is initially mixed with the fuel, and then flows into the middle joint from the lower end of the swirl cone tube, and then flows into the static mixing device from the middle joint.

[0006] Preferably, the static mixing device comprises an outer tube connected to the intermediate joint and a mixing unit arranged in the outer tube, the mixing unit comprises three sections connected in sequence: front, middle and rear sections, each section is spliced ​​into a grid shape by several frames arranged vertically intersecting each other, and the mixture is first dispersed into multiple fluids in the grid shape and then repeatedly cross-mixed in the grid shape.

[0007] Preferably, each section of the grid is formed by splicing two groups of frames that intersect vertically, and each group of frames includes three frames arranged in parallel, one frame in one group of frames includes a frame formed according to the inner wall of the outer tube and three cross bars arranged perpendicular to the frame, each cross bar is vertically connected to the corresponding frame in the other group of frames to form a grid, the three cross bars are connected by two vertically arranged vertical bars, and the two ends of each vertical bar extend to press against the inner wall of the outer tube; each cross bar is divided into three sections, one section is connected to the frame, and the other two sections are respectively connected to two vertical bars.

[0008] Preferably, the conveyor includes a cylindrical shell arranged on the frame, a conical cavity with a large diameter at the upper end and a small diameter at the lower end is provided in the shell, a feed bin connected to the material box is provided on the upper side of the shell, a compartment is formed between the shell and the cavity, an air supply unit is installed in the compartment, a discharge channel connected to the hose is provided in the compartment, after the porous granular ammonium nitrate in the feed bin enters the cavity, the heat generated by the air supply unit heats the cavity to preheat the porous granular ammonium nitrate, and the wind transported into the cavity by the air supply unit blows the porous granular ammonium nitrate to the discharge channel and then enters the hose.

[0009] Preferably, a feed port connected to the feed bin is provided at the top of the cavity, a strong air inlet is provided at the lower side wall of the cavity, a main discharge port and an auxiliary discharge port both connected to the discharge channel are provided at the lower side wall of the cavity located below the strong air inlet, a spiral air induction groove is provided on the inner wall of the cavity, the upper end of the air induction groove is connected to the strong air inlet, the middle part is connected to the main discharge port, and the lower end is connected to the auxiliary discharge port, and a weak air inlet is provided at the bottom end of the cavity. Air outlet; after the porous granular ammonium nitrate enters the cavity from the feed port, the strong wind delivered by the air supply unit through the strong air inlet flows along the air inlet groove to form a vortex flow to blow the porous granular ammonium nitrate flowing toward the lower part of the cavity downward to the main discharge port, and then flows into the discharge channel; the weak wind delivered by the air supply unit through the weak air inlet blows the residual porous granular ammonium nitrate flowing toward the bottom of the cavity upward to the auxiliary discharge port, and then flows into the discharge channel.

[0010] Preferably, a material guide plate is obliquely arranged in the cavity, the lower end of the material guide plate is connected to the auxiliary discharge port, and the higher end is arranged at the lower side of a corresponding section of the air duct, and a plurality of air holes are opened on the material guide plate. Weak wind blows toward the plurality of air holes to blow the residual porous granular ammonium nitrate to the auxiliary discharge port.

[0011] Preferably, an inner wall of the cavity is provided with an installation groove along the circumferential direction, and the periphery of the guide plate is arranged in the installation groove, half of the installation groove coincides with a section of the air induction groove from the auxiliary discharge port to its opposite position, and the other half of the installation groove is symmetrical with the half; a circular opening is provided on the guide plate near the auxiliary discharge port, and clamping strips extend on both sides of the opening respectively, and the two clamping strips are clamped into the auxiliary discharge port, and the axis of the weak air inlet passes through the opening, and the weak wind delivered by the weak air inlet blows toward the opening to blow the residual porous granular ammonium nitrate to the auxiliary discharge port.

[0012] Preferably, the guide plate located in the area where the half section of the installation groove is located is provided with several grooves, each of which extends from the edge of the guide plate to the opening, and the bottom of each groove is provided with several air holes; the inner wall of the cavity is provided with several air guide grooves from the weak air inlet to the installation groove, and a notch is provided on the edge of the guide plate corresponding to each air guide groove, and each of the grooves is connected to a notch.

[0013] Preferably, the charging radiation radius of the telescopic arm after extension is greater than 23 meters, two conveyors are used, each conveyor is connected to the hose, and after one conveyor pneumatically conveys the porous granular ammonium nitrate to the hose, it switches to the other conveyor for pneumatic conveyance.

[0014] From the above technical scheme, it can be known that after the telescopic arm intelligently finds holes, the conveyor pneumatically conveys the porous granular ammonium nitrate to the vortex cone tube, so that the fuel and the porous granular ammonium nitrate are initially mixed under the action of the vortex, and then repeatedly cross-mixed through the static mixing device, thereby improving the uniformity of the explosive mixing; at the same time, the two conveyors can realize the pneumatic continuous conveying operation of the ammonium oil explosive without stopping for feeding, thereby improving the operating efficiency, realizing the less-manpowered intelligent remote control operation, and the charging radiation radius is large, which can meet the requirements of various types of operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the present invention.

[0016] Figure 2 It is a schematic structural diagram of a preferred embodiment of the mixing unit in the present invention.

[0017] Figure 3 It is a structural schematic diagram of one of the frames of the present invention.

[0018] Figure 4 It is a grid-shaped projection schematic diagram of the present invention.

[0019] Figure 5 It is a schematic diagram of material transportation of the present invention.

[0020] Figure 6 It is a schematic cross-sectional structure diagram of a preferred embodiment of the conveyor in the present invention.

[0021] Figure 7 It is a schematic diagram of the installation structure of the material guide plate in the present invention. DETAILED DESCRIPTION

[0022] The present invention is described in detail below in conjunction with the accompanying drawings. The illustrative embodiments and descriptions of the present invention are used to explain the present invention but are not intended to limit the present invention.

[0023] like Figure 1 As shown, the present invention provides a pneumatic conveying and on-site mixing vehicle for ammonium nitrate explosives with a long telescopic arm and intelligent hole-finding, which comprises a vehicle frame 100, a material box 110 arranged on the vehicle frame and a telescopic arm 111 located on the upper side of the material box, a hose 101 is installed on the telescopic arm, a conveyor 4 is provided on the front side of the material box, and a fuel tank 112 is provided on the rear side, so that the structure is more compact and space-saving; one end of the hose is connected to the conveyor, and the other end is equipped with a swirl cone 102, which is connected to a static mixing device 41; and a conveyor 4 is provided on the front side of the material box, and a fuel tank 112 is provided on the rear side, so that the structure is more compact and space-saving; one end of the hose is connected to the conveyor, and a swirl cone 102 is installed on the other end, and the swirl cone 102 is connected to a static mixing device 41; and a conveyor 4 is provided on the front side of the material box, and a fuel tank 112 is provided on the rear side, so that the structure is more compact and space-saving. When the control device 113 at the rear of the frame controls the telescopic arm to intelligently find a blast hole, the porous granular ammonium nitrate in the material box is transported to the conveyor, and the conveyor pneumatically transports the porous granular ammonium nitrate to the vortex cone through the hose for vortex initial mixing with the fuel transported by the fuel tank. The initially mixed material is repeatedly cross-mixed into explosives through the static mixing device and then input into the blast hole, which not only ensures that the explosives are mixed evenly and improves the blasting effect; but also has fast and safe transportation and a large radiation radius, which can meet the requirements of various types of operations.

[0024] like Figure 2 , Figure 3 and Figure 4The swirl cone 102 of the present invention has a large diameter at the upper end and a small diameter at the lower end. One side of the upper end of the swirl cone is connected to the end of the hose, and the other side of the upper end of the swirl cone is connected to the fuel tank through a fuel pipe 103. The porous granular ammonium nitrate transported by wind generates a swirl in the inner cavity of the swirl cone and initially mixes with the fuel, and then flows from the lower end of the swirl cone into the middle joint 104, and then flows into the static mixing device 41 from the middle joint. During the implementation process, the end of the upper end of the swirl cone is sealed, and the hose is arranged along the tangent of the swirl cone to ensure that the transported porous granular ammonium nitrate generates a swirl in the swirl cone, thereby mixing with the fuel transported from the upper end, and then flows from the lower end of the swirl cone into the middle joint under the action of the gravity and wind pressure of the mixture.

[0025] The static mixing device 41 of the present invention includes an outer tube 411 connected to the middle joint and a mixing unit 412 arranged in the outer tube, and the mixing unit disperses the mixture after the initial mixing into multiple fluids and repeatedly cross-mixes them. The mixture flowing into the middle joint enters the outer tube and then flows into the mixing unit. The mixing unit includes three sections connected in sequence, namely the front, middle and rear sections, each of which is spliced ​​into a grid shape by several frames 413 arranged vertically intersecting. The mixture is first dispersed into 12 fluids in a grid shape, and then repeatedly cross-mixed in the grid shape, so that the mixture is mixed three times, which greatly improves the uniformity of the mixing. Preferably, the front, middle and rear sections are distributed vertically in pairs to change the flow direction of each mixing, disrupt the flow field law of the mixture, and further improve the uniformity of the mixing.

[0026] In the implementation process, the grid shape of each section is formed by splicing two groups of frames intersecting vertically, and each group of frames includes three frames arranged in parallel to ensure that the mixture can be dispersed into 12 streams of fluid. Preferably, a frame 413 in one group of frames includes a frame 414 formed according to the inner wall of the outer tube and three crossbars 415 arranged vertically to the frame, and each crossbar 415 is vertically connected to the corresponding frame in another group of frames to form a grid shape, so as to achieve repeated cross mixing. The three crossbars are connected by two vertically arranged vertical rods 416, and the two ends of each vertical rod extend to the inner wall of the outer tube, which not only ensures the stability of the whole mixing unit, but also surrounds the grid space of four rows with the outer tube, and each row is divided into three columns by two vertical rods, thereby forming 12 grids, and then the mixture is dispersed into 12 streams of fluid, ensuring that the mixture is fully dispersed, and further improving the uniformity of mixing. Each crossbar is divided into three sections, one of which is connected to the frame, and the other two sections are respectively connected to the two vertical rods. Therefore, the vertical rod and a section of the horizontal rod can be separately set as components, and then formed into an integral mixing unit by welding, and then the mixing unit is inserted into the outer tube to complete the installation. The component splicing method is not only convenient for installation and disassembly, but also conducive to cleaning.

[0027] like Figure 5 , Figure 6 and Figure 7 The conveyor 4 of the present invention comprises a cylindrical shell 5 arranged on the frame, and a conical cavity 1 with a large diameter at the upper end and a small diameter at the lower end is provided in the shell. This structure can make the porous granular ammonium nitrate gather in the lower part with a smaller space, which is conducive to centralized transportation; a feed bin 6 connected to the material box is provided on the upper side of the shell, and a compartment 7 is formed between the shell and the cavity, and an air supply unit is installed in the compartment. A discharge channel 3 connected to the hose is provided in the compartment. After the porous granular ammonium nitrate in the feed bin enters the cavity, the heat generated by the air supply unit heats the cavity to preheat the porous granular ammonium nitrate, and the wind transported into the cavity by the air supply unit blows the porous granular ammonium nitrate to the discharge channel, and then flows into the hose, and is mixed with the fuel in the swirl cone and the static mixing device to form explosives and then transported to the blast hole. It can be seen that the present invention realizes pneumatic conveying, which is not only not prone to blockage, but also improves the conveying speed, makes the conveying more uniform, and is safer; and preheats the porous granular ammonium nitrate, thereby improving the uniformity and detonation sensitivity of subsequent explosive mixing.

[0028] Preferably, a feed port 11 connected to the feed bin is provided at the top of the cavity, a strong air inlet 12 is provided at the lower side wall of the cavity, a main discharge port 13 and an auxiliary discharge port 14 both connected to the discharge channel 3 are provided on the lower side wall of the cavity located below the strong air inlet, a spiral air induction groove 15 is provided on the inner wall of the cavity, the upper end of the air induction groove is connected to the strong air inlet, the middle part is connected to the main discharge port, and the lower end is connected to the auxiliary discharge port, and a weak air inlet 16 is provided at the bottom end of the cavity. During the implementation process, after the porous granular ammonium nitrate enters the cavity from the feed port, the strong wind conveyed by the air supply unit through the strong air inlet flows along the air induction groove to form a vortex to blow the porous granular ammonium nitrate flowing to the lower part of the cavity downward to the main discharge port, and then flows into the discharge channel. At the same time, the weak wind conveyed by the air supply unit through the weak air inlet blows the residual porous granular ammonium nitrate flowing to the bottom of the cavity upward to the auxiliary discharge port, and then flows into the discharge channel. Therefore, the present invention realizes the pneumatic conveying of porous granular ammonium nitrate through the dual blowing mode from top to bottom and from bottom to top, which can not only ensure more uniform conveying, but also not easy to be blocked and blow more thoroughly.

[0029] The strong wind used in the present invention refers to the wind delivered by the air supply unit with a relatively large positive pressure, and the weak wind refers to the wind delivered by the air supply unit with a relatively small positive pressure. After the porous granular ammonium nitrate enters the cavity from the top, it will fall downward under the action of its own gravity. When it falls to the lower part of the cavity, a strong wind of swirl can be generated to break it up and evenly transport it downward to the main discharge port. During the implementation process, there may be a small part of the porous granular ammonium nitrate that overcomes the strong wind and falls to the bottom of the cavity under the action of gravity. Therefore, the present invention sets an upward weak wind at the bottom, so as to "lift" the residual porous granular ammonium nitrate, so that it cannot be "precipitated" at the bottom of the cavity, and then blow it to the auxiliary discharge port and "converge" with the porous granular ammonium nitrate in the main discharge port, so as to ensure that the porous granular ammonium nitrate is transported more thoroughly and avoid residue.

[0030] Specifically, a guide plate 2 is obliquely arranged in the cavity 1, and the lower end of the guide plate is connected to the auxiliary discharge port, and the upper end is arranged at the lower side of a corresponding section of the air duct, so that all the residual porous granular ammonium nitrate can fall on the guide plate, and the inclined guide plate can guide the porous granular ammonium nitrate to the auxiliary discharge port, further avoiding the residual porous granular ammonium nitrate; a plurality of air holes 21 are opened on the guide plate 2, and weak wind blows toward the plurality of air holes to blow the residual porous granular ammonium nitrate to the auxiliary discharge port, avoiding the porous granular ammonium nitrate to remain on the guide plate. Preferably, the inner wall of the cavity is provided with a mounting groove 17 along the circumferential direction, the periphery of the guide plate is arranged in the mounting groove, half of the mounting groove coincides with a section of the air induction groove from the auxiliary discharge port to its opposite position, and the other half of the mounting groove is symmetrical with the half, that is, half of the edge of the guide plate is arranged in the air induction groove, and the other half of the edge of the guide plate is arranged on the lower side of the corresponding air induction groove through the symmetrical mounting grooves. When the strong wind blows most of the porous granular ammonium nitrate to the main discharge port, a small part of the strong wind may pass over the main discharge port and flow along the air induction groove of the lower section. Thus, under the action of swirl, the porous granular ammonium nitrate remaining in this section is blown to the guide plate on the lower side by the strong wind. When the strong wind flows to contact the guide plate, the edge of the guide plate in the air duct collides with the strong wind, thereby destroying the swirling effect of the strong wind, and then stopping the strong wind from flowing and guiding it to the guide plate, thereby blowing all the porous granular ammonium nitrate on the guide plate to the auxiliary discharge port at the lower end of the guide plate, completely preventing the porous granular ammonium nitrate from remaining on the guide plate.

[0031] A circular opening 22 is provided on the guide plate 2 near the auxiliary discharge port, and a clamping strip 23 extends from both sides of the opening. The two clamping strips are inserted into the auxiliary discharge port, which is not only convenient for placing the guide plate, but also convenient for guiding the porous granular ammonium nitrate to the auxiliary discharge port. During the implementation process, the weak wind at the bottom blows toward the opening to blow the remaining porous granular ammonium nitrate to the auxiliary discharge port. Since the opening is provided on the inclined guide plate, the porous granular ammonium nitrate on the guide plate is easier to flow toward the opening, further avoiding residue, and then under the conveying pressure of the weak wind, the porous granular ammonium nitrate at the opening without any obstruction is completely blown toward the auxiliary discharge port. And the axis of the weak air inlet passes through the opening, thereby ensuring that there is a large air volume at the opening to provide sufficient conveying pressure.

[0032] The present invention provides several grooves 24 on the guide plate 2 located in the area where the half section of the installation groove is located, and each groove extends from the edge of the guide plate to the opening. Since the area corresponding to the half section is difficult to be blown by strong wind, the provision of grooves is conducive to the flow of porous granular ammonium nitrate in this part, ensuring that no residue will remain in this area. Preferably, the bottom of each groove is provided with several air holes 21 to prevent the porous granular ammonium nitrate from remaining at the bottom of the groove. Several air guide grooves 18 are provided on the inner wall of the cavity 1 from the weak air inlet to the installation groove, and a notch 25 is provided on the edge of the guide plate corresponding to each air guide groove, and each of the grooves is connected to a notch, so that weak wind can flow along the air guide groove to the notch, preventing the porous granular ammonium nitrate from remaining in the gap between the installation groove and the guide plate.

[0033] Preferably, the top of the shell 5 is provided with a cover plate 51 covering the top of the closed cavity, the feed bin 6 is arranged on the cover plate, and the feed port is opened on the cover plate; the bottom of the shell is provided with a bottom plate 52 covering the bottom of the closed cavity, thereby the cavity and the compartment are closed by the cover plate and the bottom plate, which can improve the sealing and prevent heat loss; the weak air inlet is opened on the bottom plate, and the air supply unit includes a strong air supply fan 8 and a weak air supply fan 9 installed on the bottom plate, the strong air supply fan delivers strong wind to the strong air inlet, and the weak air supply fan delivers weak wind to the weak air inlet, thereby realizing the classification control of strong and weak wind. In the implementation process, a feed pipe 61 is arranged on the feed bin 6, and the feed bin is funnel-shaped, and its lower end outlet is connected to the feed port, thereby the porous granular ammonium nitrate can be quantitatively transported into the feed bin, and the porous granular ammonium nitrate flows into the cavity from the feed port under the action of gravity, realizing quantitative transportation.

[0034] Specifically, the strong air inlet and the strong air inlet are both arranged on one side of the cavity, and the strong air inlet pipe 81 connecting the strong air inlet and the strong air inlet is tangentially arranged on the outer wall of the cavity on this side to ensure that the strong wind enters the air inlet groove tangentially to achieve the purpose of forming a swirl; the weak air inlet, the main discharge port and the auxiliary discharge port are all arranged on the other side of the cavity. On the one hand, such an arrangement provides heat sources on both sides of the cavity to improve the uniformity of preheating; on the other hand, the space of the compartment is fully utilized and the layout is more reasonable. The discharge channel 3 tangentially arranged on the outer wall of the cavity on the other side is a three-way channel, which is conducive to balancing the layout of the cavity, making air intake and discharge more convenient, thereby increasing the discharge speed and preventing blockage; wherein the two forks of the three-way channel are respectively connected to the main discharge port and the auxiliary discharge port, and the third fork is connected to the discharge pipe 31 installed on the outer wall of the shell. During the implementation process, due to the high conveying pressure of strong wind, a certain negative pressure is formed on the auxiliary discharge port after it enters the discharge channel, thereby making the discharge speed of the auxiliary discharge port faster and smoother, further avoiding material blockage.

[0035] A bottom bin 10 is provided on the lower side of the bottom plate of the present invention, and a weak air inlet pipe 91 connected to the weak air inlet fan passes through the bottom plate into the bottom bin and is connected to the weak air inlet, so that the weak air inlet can be inclined corresponding to the material guide plate to ensure that the axis of the weak air inlet passes through the opening; the bottom of the bottom bin is open, and a filter screen 53 is installed on it, and an air induced draft duct 54 is provided in the bottom bin, and two interfaces at one end of the air induced draft duct are respectively connected to the air inlets of the strong air inlet fan and the weak air inlet fan, and the other end of the air induced draft duct is arranged on the upper side of the filter screen, so that under the action of the air supply unit, the external air is filtered and introduced into the cavity by the air induced draft duct, thereby improving the purity of the wind and ensuring the quality of the porous granular ammonium nitrate. The present invention stores the entire pneumatic system in the bottom bin and the outer shell, which not only makes full use of the waste heat, but also does not install other components on the outside of the entire conveyor except for the control valve, pressure gauge, etc. On the one hand, the volume of the entire conveyor is reduced, reducing the occupied space; on the other hand, it reduces interference with other equipment on the mixed loading vehicle, further improving safety.

[0036] The charge radiation radius after the telescopic arm of the present invention is extended can be greater than 23 meters, and the radiation radius is large, which can adapt to different operation requirements. The present invention adopts two conveyors, each of which is connected to the hose, and one of the conveyors switches to the other conveyor for pneumatic conveying after pneumatically conveying porous granular ammonium nitrate to the hose, thereby realizing the pneumatic continuous conveying operation of ammonium oil fuel oil explosive. In the implementation process, the switching control can be automatically controlled by installing components such as sensors and electromagnetic valves. When the sensor detects that the porous granular ammonium nitrate in one conveyor has been conveyed, the electromagnetic valve of the conveyor is controlled to be closed to feed it again; and the electromagnetic valve of another conveyor is automatically controlled to open to realize continuous conveying. The fuel of ammonium oil fuel oil explosive and the porous granular ammonium nitrate pneumatically conveyed by the conveyor are respectively conveyed to the swirl cone for swirl initial mixing, and then flow into the static mixing device for repeated cross mixing, and then flow into the blast hole after being collected. Thus, the uniformity of explosive mixing is greatly improved by the initial mixing of the swirl cone and the repeated cross mixing of the static mixing device, and the explosion effect is guaranteed. At the same time, the present invention utilizes the wind pressure of pneumatically conveying porous granular ammonium nitrate to achieve swirl initial mixing without the need for additional power, thus saving energy consumption and reducing costs.

Claims

1. A pneumatic conveying and on-site mixing vehicle for ammonium nitrate explosives with a long telescopic arm and intelligent hole-finding, comprising a vehicle frame, a material box arranged on the vehicle frame, and a telescopic arm located on the upper side of the material box, wherein a hose is installed on the telescopic arm, and the vehicle frame comprises: A conveyor is provided on the front side of the material box and a fuel tank is provided on the rear side. One end of the hose is connected to the conveyor and the other end is provided with a swirl cone, which is connected to a static mixing device. When the control device arranged at the rear of the frame controls the telescopic arm to intelligently find a blast hole, the porous granular ammonium nitrate in the material box is transported to the conveyor, and the conveyor pneumatically transports the porous granular ammonium nitrate to the swirl cone through the hose for swirl initial mixing with the fuel transported by the fuel tank. The initially mixed material is repeatedly cross-mixed into explosives through the static mixing device and then input into the blast hole.

2. According to the long telescopic arm and intelligent hole-finding pneumatic conveying ANFO on-site mixing vehicle of claim 1, it is characterized in that: The upper end diameter of the swirl cone tube is large and the lower end diameter is small. One side of the upper end of the swirl cone tube is connected to the end of the hose, and the other side of the upper end of the swirl cone tube is connected to the fuel tank through a fuel pipe. The porous granular ammonium nitrate transported by air generates a swirl in the inner cavity of the swirl cone tube and is initially mixed with the fuel, and then flows into the middle joint from the lower end of the swirl cone tube, and then flows into the static mixing device from the middle joint.

3. According to the long telescopic arm and intelligent hole-finding pneumatic conveying ANFO on-site mixing vehicle of claim 2, it is characterized in that: The static mixing device includes an outer tube connected to the middle joint and a mixing unit arranged in the outer tube. The mixing unit includes three sections, namely front, middle and rear sections, which are connected in sequence. Each section is spliced ​​into a grid shape by several frames arranged vertically intersecting each other. The mixture is first dispersed into multiple fluids in the grid shape and then repeatedly cross-mixed in the grid shape.

4. The on-site mixing vehicle for ammonium nitrate oil explosives with pneumatic conveying and intelligent hole-finding with long telescopic arms according to claim 3 is characterized in that: Each section of the grid is formed by splicing two groups of frames that intersect vertically, and each group of frames includes three frames arranged in parallel. One frame in one group of frames includes a frame formed according to the inner wall of the outer tube and three cross bars arranged perpendicular to the frame. Each cross bar is vertically connected to the corresponding frame in the other group of frames to form a grid. The three cross bars are connected by two vertically arranged vertical bars, and the two ends of each vertical bar extend to press against the inner wall of the outer tube; each cross bar is divided into three sections, one of which is connected to the frame, and the other two sections are respectively connected to two vertical bars.

5. The on-site mixing vehicle for ammonium nitrate oil explosives with a long telescopic arm and intelligent hole-finding pneumatic conveying according to any one of claims 1 to 4, characterized in that: The conveyor includes a cylindrical shell arranged on the frame, and a conical cavity with a large diameter at the upper end and a small diameter at the lower end is provided in the shell. A feed bin connected to the material box is provided on the upper side of the shell, and a compartment is formed between the shell and the cavity. A blower unit is installed in the compartment, and a discharge channel connected to the hose is provided in the compartment. After the porous granular ammonium nitrate in the feed bin enters the cavity, the heat generated by the blower unit heats the cavity to preheat the porous granular ammonium nitrate, and the wind transported into the cavity by the blower unit blows the porous granular ammonium nitrate to the discharge channel and then enters the hose.

6. The on-site mixing vehicle for ammonium nitrate oil explosives with pneumatic conveying and intelligent hole-finding with long telescopic arms according to claim 5 is characterized in that: The top of the cavity is provided with a feed port connected to the feed bin, the lower side wall of the cavity is provided with a strong air inlet, the lower side wall of the cavity is provided with a main discharge port and an auxiliary discharge port both connected to the discharge channel, located below the strong air inlet, a spiral air induction groove is provided on the inner wall of the cavity, the upper end of the air induction groove is connected to the strong air inlet, the middle part is connected to the main discharge port, and the lower end is connected to the auxiliary discharge port, and the bottom end of the cavity is provided with a weak air inlet After the porous granular ammonium nitrate enters the cavity from the feed port, the strong wind delivered by the air supply unit through the strong air inlet flows along the air duct to form a vortex flow to blow the porous granular ammonium nitrate flowing toward the lower part of the cavity downward to the main discharge port, and then flows into the discharge channel. The weak wind delivered by the air supply unit through the weak air inlet blows the residual porous granular ammonium nitrate flowing toward the bottom of the cavity upward to the auxiliary discharge port, and then flows into the discharge channel.

7. The on-site mixing vehicle for ammonium nitrate oil explosives with pneumatic conveying and intelligent hole-finding with long telescopic arms according to claim 6 is characterized in that: A material guide plate is obliquely arranged in the cavity, wherein the lower end of the material guide plate is connected to the auxiliary discharge port, and the higher end of the material guide plate is arranged at the lower side of a corresponding section of the air duct. A plurality of air holes are opened on the material guide plate, and weak wind blows toward the plurality of air holes to blow the residual porous granular ammonium nitrate to the auxiliary discharge port.

8. The on-site mixing vehicle for ammonium nitrate oil explosives with pneumatic conveying and intelligent hole-finding with long telescopic arms according to claim 7 is characterized in that: An inner wall of the cavity is provided with a mounting groove along the circumferential direction, and the periphery of the guide plate is arranged in the mounting groove, half of the mounting groove coincides with a section of the air induction groove from the auxiliary discharge port to the opposite position thereof, and the other half of the mounting groove is symmetrical with the half; a circular opening is provided on the guide plate near the auxiliary discharge port, and clamping strips extend on both sides of the opening respectively, and the two clamping strips are clamped into the auxiliary discharge port, and the axis of the weak air inlet passes through the opening, and the weak wind delivered by the weak air inlet blows toward the opening to blow the residual porous granular ammonium nitrate to the auxiliary discharge port.

9. The on-site mixing vehicle for ammonium nitrate oil explosives with pneumatic conveying and intelligent hole-finding with long telescopic arms according to claim 8 is characterized in that: The guide plate located in the area where the half section of the installation groove is located is provided with several grooves, each of which extends from the edge of the guide plate to the opening, and the bottom of each groove is provided with several air holes; the inner wall of the cavity is provided with several air guide grooves from the weak air inlet to the installation groove, and a notch is provided on the edge of the guide plate corresponding to each air guide groove, and each of the grooves is connected to a notch.

10. The on-site mixing vehicle for ammonium nitrate oil explosives with pneumatic conveying and intelligent hole-finding with long telescopic arms according to claim 1 is characterized in that: The charging radiation radius of the telescopic arm after extension is greater than 23 meters. Two conveyors are used, each of which is connected to the hose. After one conveyor pneumatically conveys the porous granular ammonium nitrate to the hose, it switches to the other conveyor for pneumatic conveying.

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