Hose tail end static mixer for on-site mixed loading ammonium nitrate fuel oil explosive truck

Abstract

The invention relates to equipment for on-site mixed loading of ammonium nitrate fuel oil explosives, in particular to a static mixer at the tail end of a hose for an on-site mixed loading truck of ammonium nitrate fuel oil explosives, which comprises a hose and a rotational flow taper pipe which are arranged on a telescopic arm of the truck of ammonium nitrate fuel oil explosives, fuel of the ammonium nitrate fuel oil explosive and porous granular ammonium nitrate pneumatically conveyed through the hose are respectively conveyed into the rotational flow taper pipe to be subjected to rotational flow primary mixing and then flow into the static mixing device, the static mixing device disperses the mixture subjected to primary mixing into multiple strands of fluid to be subjected to repeated cross mixing, and then the fluid is collected and output. The cyclone taper pipe is arranged by utilizing the wind pressure of pneumatic conveying of porous granular ammonium nitrate, so that the fuel and the porous granular ammonium nitrate are primarily mixed under the cyclone effect, and then are dispersed into a plurality of fluids through the three-section latticed static mixing device for repeated cross mixing, so that the mixing time is prolonged, the mixing uniformity is improved, and the mixing efficiency is improved. And the core component mixing unit of the static mixing device is convenient to mount and dismount, and is beneficial to cleaning.

Description

Technical Field

[0001] The invention relates to equipment for on-site mixing of ammonium nitrate oil and fuel oil, in particular to a static mixer at the end of a hose used for on-site mixing of an ammonium nitrate oil and fuel oil vehicle. Background Art

[0002] In the blasting industry, in order to improve safety, mixing trucks are gradually used to mix explosives on site. At present, the main component of ammonium nitrate-fuel explosives mixed on site is porous granular ammonium nitrate. After the porous granular ammonium nitrate and fuel are transported to the mixer and mixed, the mixing truck's telescopic arm directly transports them to the blasthole to achieve blasting. There are many types of existing mixers, but most of the mixed explosives are not uniform, which affects the blasting effect, and the mixer is inconvenient to install, disassemble and clean. Summary of the invention

[0003] In view of the above technical problems, the present invention provides a hose-end static mixer for on-site mixing of ammonium nitrate oil explosive vehicles, which is easy to install and disassemble and can mix evenly.

[0004] The technical solution adopted by the present invention to solve the above technical problems is: a static mixer at the end of a hose for on-site mixing of an ammonium oil-fuel mixture truck, which comprises a hose installed on a telescopic arm of the ammonium oil-fuel mixture truck, and also comprises a swirl cone connected to the end of the hose, the fuel of the ammonium oil-fuel mixture and the porous granular ammonium nitrate pneumatically transported through the hose are respectively transported into the swirl cone for swirl initial mixing and then flow into the static mixing device, the static mixing device disperses the initially mixed mixture into multiple fluids for repeated cross mixing, and then outputs them after being collected.

[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 a fuel pipe for conveying fuel for ammonium nitrate oil explosive, and the pneumatically conveyed 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 middle joint and a mixing unit arranged in the outer tube, and the mixing unit disperses the initially mixed mixture into multiple fluid streams and performs repeated cross-mixing.

[0007] Preferably, the mixing unit comprises three sections connected in sequence: front, middle and rear sections, each section being spliced ​​into a grid shape by several frames arranged vertically intersecting each other, and the mixture is first dispersed into multiple fluids from the grid shape and then repeatedly cross-mixed within the grid shape.

[0008] Preferably, the front, middle and rear sections are vertically distributed in pairs.

[0009] Preferably, the grid shape of each segment disperses the fluid into 12 streams.

[0010] 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.

[0011] Preferably, one frame in one group of frames comprises a frame formed according to the inner wall of the outer tube and three cross bars arranged perpendicular to the frame, and each cross bar is vertically connected to a corresponding frame in another group of frames to form a grid.

[0012] Preferably, the three horizontal bars are connected by two vertical bars arranged vertically, and both ends of each vertical bar extend to press against the inner wall of the outer tube.

[0013] Preferably, each horizontal rod is divided into three sections, one of which is connected to the frame, and the other two sections are connected to two vertical rods respectively.

[0014] From the above technical scheme, it can be seen that the present invention utilizes the wind pressure of pneumatically conveying porous granular ammonium nitrate to set a swirl cone tube, so that the fuel and the porous granular ammonium nitrate are initially mixed under the action of swirl, and then dispersed into multiple fluids through a three-stage grid-shaped static mixing device for repeated cross-mixing. This not only prolongs the mixing time and improves the uniformity of the mixing, but also the core component of the static mixing device, the mixing unit, is easy to install and disassemble, which is conducive to cleaning. 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. DETAILED DESCRIPTION

[0019] 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.

[0020] like Figure 1 , Figure 2 , Figure 3 and Figure 4The invention provides a kind of hose end static mixer for on-site mixed ammonium oil-fuel mixture vehicle, it comprises a hose 101 installed on the telescopic arm of the ammonium oil-fuel mixture vehicle, also comprises a swirl cone 102 connected to the end of the hose, the fuel of the ammonium oil-fuel mixture and the porous granular ammonium nitrate pneumatically conveyed by the described hose are respectively delivered to the described swirl cone for swirl initial mixing and then flow into a static mixing device 41, the static mixing device disperses the mixture after the initial mixing into multiple streams of fluids for repeated cross mixing, and then outputs after assembling. Thus, by the repeated cross mixing of the initial mixing of the swirl cone and the static mixing device, the uniformity of explosive mixing is greatly improved, and the explosion effect is guaranteed. Meanwhile, the present invention utilizes the wind pressure of the pneumatically conveyed porous granular ammonium nitrate to realize the initial mixing of swirl, without the need for additional power, saves energy consumption, and reduces cost.

[0021] Specifically, the upper end diameter of the swirl cone 102 is large and the lower end diameter is small. One side of the upper end of the swirl cone is connected to the end of the hose. The other side of the upper end of the swirl cone is connected to a fuel pipe 103 for conveying fuel of ammonium nitrate oil explosive. The porous granular ammonium nitrate conveyed by wind generates a swirl in the inner cavity of the swirl cone and initially mixes with the fuel, and then flows into the intermediate joint 104 from the lower end of the swirl cone, and then flows into the static mixing device 41 from the intermediate joint. In 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 conveyed porous granular ammonium nitrate generates a swirl in the swirl cone, thereby mixing with the fuel conveyed from the upper end, and then flows into the intermediate joint from the lower end of the swirl cone under the action of the gravity and wind pressure of the mixture.

[0022] 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.

[0023] 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.

Claims

1. A hose end static mixer for on-site mixed loading of an ammonium oil-fired explosive vehicle, comprising a hose mounted on a telescopic arm of the ammonium oil-fired explosive vehicle, characterized in that: It also includes a swirl cone connected to the end of the hose. The fuel of the ammonium oil explosive and the porous granular ammonium nitrate pneumatically transported through the hose are respectively transported to the swirl cone for swirl initial mixing and then flow into a static mixing device. The static mixing device disperses the initially mixed mixture into multiple fluids for repeated cross-mixing, and then gathers them for output.

2. according to claim 1, for the described hose end static mixer of on-site mixed ammonium nitrate oil explosive vehicle, 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 a fuel pipe for conveying fuel for ammonium nitrate oil explosive. The porous granular ammonium nitrate conveyed by pneumatic means 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 claim 2, the described hose end static mixer for on-site mixed ammonium nitrate oil explosive vehicle is characterized in that: The static mixing device comprises an outer tube connected to the middle joint and a mixing unit arranged in the outer tube, and the mixing unit disperses the initially mixed mixture into multiple fluid streams and performs repeated cross mixing.

4. according to claim 3, the described hose end static mixer for on-site mixed ammonium nitrate oil explosive vehicle is characterized in that: The mixing unit comprises 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 and intersecting each other. The mixture is first dispersed into multiple streams of fluid from the grid shape and then repeatedly cross-mixed in the grid shape.

5. according to claim 4, the described hose end static mixer for on-site mixed ammonium nitrate oil explosive vehicle is characterized in that: The front, middle and back sections are distributed vertically in pairs.

6. according to claim 4, the described hose end static mixer for on-site mixed ammonium nitrate oil explosive vehicle is characterized in that: The grid shape of each segment disperses the fluid into 12 streams.

7. according to claim 4, the described hose end static mixer for on-site mixed ammonium nitrate oil explosive vehicle is characterized in that: The grid shape of each section is composed of two sets of frames that intersect vertically, and each set of frames contains three frames set in parallel.

8. The hose end static mixer for on-site mixed ammonium nitrate oil explosive vehicle according to claim 7, characterized in that: One frame in one set of frames includes a frame formed according to the inner wall of the outer tube and three cross bars arranged perpendicular to the frame, and each cross bar is vertically connected to a corresponding frame in another set of frames to form a grid.

9. According to any one of the claims 8, the hose end static mixer for on-site mixed ammonium nitrate oil explosive vehicle is characterized in that: The three horizontal bars are connected by two vertical bars, and two ends of each vertical bar extend to abut against the inner wall of the outer tube.

10. The hose end static mixer for on-site mixed ammonium nitrate oil explosive vehicle according to claim 9, characterized in that: Each horizontal rod is divided into three sections, one of which is connected to the frame, and the other two sections are respectively connected to two vertical rods.

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