Porous granular ammonium nitrate feeding device

Abstract

The utility model relates to the technical field of porous granular ammonium nitrate fuel oil explosive production equipment, and particularly discloses a porous granular ammonium nitrate feeding device. Comprising a hopper, a spiral conveyor, bag breaking mechanisms and a driving mechanism, the top of the hopper is open, a discharging opening in the bottom of the hopper is connected with a feeding opening of the spiral conveyor in a sealed mode, the two bag breaking mechanisms are arranged in the upper portion of the hopper in a swinging mode, and each bag breaking mechanism comprises a bag breaking claw and swing arms fixed to the two ends of the bag breaking claw; two groups of driving mechanisms connected with the upper ends of the swing arms of the corresponding bag breaking mechanisms are arranged on the outer side of the hopper; the two bag breaking claws are driven by the air cylinder of the driving mechanism to swing in the opposite directions to tear the bottom of the ton bag, traditional manual cutting at the bottom of the ton bag is replaced, the risk that personnel are injured by the ton bag is avoided, meanwhile, the screen and the iron removing rod are arranged in the hopper, porous granular ammonium nitrate is filtered and iron is removed, and the production efficiency is improved. Impurities such as iron and nickel are prevented from being mixed into porous granular ammonium nitrate, and the accidental explosion risk is reduced.

Description

Technical field:

[0001] The utility model relates to the technical field of porous granular ammonium nitrate oil explosive production equipment, in particular to a porous granular ammonium nitrate feeding device. Background technology:

[0002] Porous granular ammonium nitrate oil explosive is a commonly used industrial explosive. Its preparation process includes: breaking the bags of porous granular ammonium nitrate, screening and removing impurities, using a screw conveyor and an elevator to fill the processed porous granular ammonium nitrate into a mixed explosive vehicle, and transporting it to the blasting site in separate compartments with diesel and other fuels. At the site, the porous granular ammonium nitrate is mixed with the fuel to make porous granular ammonium nitrate oil explosive for blasting.

[0003] Porous granular ammonium nitrate is mostly packaged in ton bags. The traditional method of putting porous granular ammonium nitrate in the bag requires manual use of a handheld cutting knife to cut the bottom of the ton bag. The porous granular ammonium nitrate falls from the opening at the bottom of the ton bag into the hopper below, and is quantitatively delivered to the mixed explosives truck through the conveyor at the bottom of the hopper. Since the ton bags are heavy, the arms of personnel are directly under the ton bags when cutting the ton bags, and they may be hit by the ton bags. In addition, iron cutting knives are prone to sparks. If the blade breaks and mixes into the porous granular ammonium nitrate, it is easy to cause an explosion after extrusion and collision, posing a safety hazard. Utility model content:

[0004] The utility model aims to provide a porous granular ammonium nitrate feeding device to solve the problems existing in the prior art.

[0005] The utility model is implemented by the following technical scheme: a porous granular ammonium nitrate feeding device, including a hopper, a screw conveyor, a bag breaking mechanism and a driving mechanism, the hopper has an opening at the top, the discharge port at the bottom of the hopper is sealed and connected to the feeding port of the screw conveyor, two bag breaking mechanisms are swingably provided in the upper part of the hopper, the bag breaking mechanism includes bag breaking claws and swing arms fixed at both ends of the bag breaking claws, the bag breaking claws are provided with spurs, and two groups of driving mechanisms connected to the upper ends of the swing arms of the corresponding bag breaking mechanisms are provided on the outside of the hopper.

[0006] Furthermore, the driving mechanism includes a first group of driving mechanisms connected to one of the bag breaking mechanisms, and a second group of driving mechanisms connected to the other bag breaking mechanism; the first group of driving mechanisms includes a first driving arm, a first transmission shaft and a first cylinder; the second group of driving mechanisms includes a second driving arm, a second transmission shaft and a second cylinder; one end of the first transmission shaft passes through the side wall of the hopper and is clamped with the swing arm of one of the bag breaking mechanisms, the other end of the first transmission shaft is fixedly connected to the upper end of the first driving arm, the lower end of the first driving arm is hinged to the telescopic end of the first cylinder, and the fixed end of the first cylinder is hinged to the outer wall of the hopper; one end of the second transmission shaft coaxially passes through the first transmission shaft and is clamped with the swing arm of the other bag breaking mechanism, the other end of the second transmission shaft is fixedly connected to the upper end of the second driving arm, the lower end of the second driving arm is hinged to the telescopic end of the second cylinder, and the fixed end of the second cylinder is hinged to the outer wall of the hopper.

[0007] Furthermore, a keyway is provided at the position where the first transmission shaft and the second transmission shaft are connected to the swing arm, and a key tooth is provided at the upper end of the swing arm. The first transmission shaft and the second transmission shaft are clamped and fixed to the swing arm through the keyway and the key tooth.

[0008] Furthermore, a screen is horizontally installed in the hopper and below the bag breaking claws.

[0009] Furthermore, it also includes an iron removal rod, which includes an outer copper sleeve and a permanent magnet rod inserted inside. The iron removal rod is inserted from the opposite side walls of the hopper and is arranged alternately under the screen. A fixing ear is fixed at one end of the sleeve outside the hopper, and the fixing ear is fixed to the outer wall of the hopper by bolts.

[0010] The advantages of the utility model are as follows: the cylinder of the driving mechanism drives the two bag-breaking claws to swing in opposite directions to tear the bottom of the ton bag, replacing the traditional manual cutting at the bottom of the ton bag, avoiding the risk of people being injured by the ton bag; at the same time, a screen and iron removal rods are provided in the hopper to filter and remove iron from the porous granular ammonium nitrate, preventing impurities such as iron and nickel from mixing into the porous granular ammonium nitrate, and reducing the risk of accidental explosion. Description of the drawings:

[0011] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0012] Figure 2 It is a schematic diagram of the structure of the bag breaking mechanism and the driving mechanism.

[0013] Figure 3 Schematic diagram of the local structure of the keyway and key teeth.

[0014] Figure 4 This is a front cross-sectional view of the hopper.

[0015] In the figure: it includes a hopper 1, a screw conveyor 2, a bag breaking mechanism 3, a driving mechanism 4, a screen 5, an iron removal rod 6, a bag breaking claw 301, a swing arm 302, a spur 303, a key tooth 304, a first driving arm 401, a first transmission shaft 402, a first cylinder 403, a second driving arm 404, a second transmission shaft 405, a second cylinder 406, a keyway 407, a sleeve 601, a permanent magnet rod 602, and a fixing ear 603. Specific implementation method:

[0016] The following will be combined with the drawings of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0017] In the description of the present invention, it should be noted that the terms "center", "up", "down", "front", "back", "top", "bottom", "left", "right", "vertical", "horizontal", "inside" and "outside" etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0018] like Figure 1 As shown: a porous granular ammonium nitrate feeding device, including a hopper 1, a screw conveyor 2, a bag breaking mechanism 3 and a driving mechanism 4. The hopper 1 is open at the top. When feeding, a ton bag is put into the hopper 1 from the top opening. The discharge port at the bottom of the hopper 1 is sealed and connected with the feeding port of the screw conveyor 2. The porous granular ammonium nitrate in the ton bag first falls into the hopper 1, and then is transported to a high place by the screw conveyor 2, and loaded from the top of the mixed explosive truck; two bag breaking mechanisms 3 are swingably provided in the upper part of the hopper 1, and the bag breaking mechanism 3 includes a bag breaking claw 301 and a swing arm 302 fixed at both ends of the bag breaking claw 301. The bag breaking claw 301 is provided with a thorn 303, which is used to pierce the bottom of the ton bag. Two sets of driving mechanisms 4 connected to the upper ends of the swing arms 302 of the corresponding bag breaking mechanisms 3 are provided on the outside of the hopper 1. The driving mechanism 4 drives the two bag breaking claws 301 to open in opposite directions through the swing arms 302 at both ends of the bag breaking claws 301, and the bottom of the ton bag is torn open by the thorn 303 piercing the bottom of the ton bag, and the porous granular ammonium nitrate falls into the hopper 1 through the torn crack; a screen 5 is horizontally installed in the hopper 1 and below the bag breaking claw 301. The screen 5 is used to block debris to prevent it from mixing in.

[0019] like Figure 2As shown: the driving mechanism 4 includes a first group of driving mechanisms connected to one of the bag breaking mechanisms 3, and a second group of driving mechanisms connected to the other bag breaking mechanism 3; the first group of driving mechanisms includes a first driving arm 401, a first transmission shaft 402 and a first cylinder 403; the second group of driving mechanisms includes a second driving arm 404, a second transmission shaft 405 and a second cylinder 406; one end of the first transmission shaft 402 passes through the side wall of the hopper 1 and is clamped with the swing arm 302 of one of the bag breaking mechanisms 3, the other end of the first transmission shaft 402 is fixedly connected to the upper end of the first driving arm 401, the lower end of the first driving arm 401 is hinged to the telescopic end of the first cylinder 403, and the fixed end of the first cylinder 403 is hinged to the outer wall of the hopper 1; the first transmission shaft 402 is a hollow shaft, and one end of the second transmission shaft 405 passes through the first driving arm 401, the first transmission shaft 402 and the swing arm 302 clamped with the first transmission shaft 402 in sequence, and is connected to the swing arm 302 of the other bag breaking mechanism 3 The second transmission shaft 405 is coaxially rotatably arranged with the first transmission shaft 402, the other end of the second transmission shaft 405 is fixedly connected to the upper end of the second driving arm 404, the lower end of the second driving arm 404 is hinged to the telescopic end of the second cylinder 406, and the fixed end of the second cylinder 406 is hinged to the outer wall of the hopper 1; when the bag needs to be broken, the first cylinder 403 and the second cylinder 406 are shortened, and the first driving arm 401 and the second driving arm 404 are pulled to swing in opposite directions respectively, driving the first transmission shaft 402 and the second transmission shaft 405 at the other ends of the first driving arm 401 and the second driving arm 404 to rotate, and the first transmission shaft 402 and the second transmission shaft 405 then drive the two swing arms 302 respectively connected thereto to swing in opposite directions, so that the two bag breaking claws 301 are opened opposite to each other, and the bottom of the ton bag is torn open; after the feeding is completed, the first cylinder 403 and the second cylinder 406 are controlled to extend, and the two bag breaking claws 301 are closed, ready for the next bag breaking.

[0020] like Figure 3 As shown: a key slot 407 is provided at the position where the first transmission shaft 402 and the second transmission shaft 405 are connected to the swing arm 302, and a key tooth 304 is provided at the upper end of the swing arm 302. The first transmission shaft 402 and the second transmission shaft 405 are meshed and fixed with the swing arm 302 through the key slot 407 and the key tooth 304, and the swing arm 302 is connected to the first transmission shaft 402 and the second transmission shaft 405 through the key tooth 304 and the key slot 407. When disassembly and assembly are required, the meshing of the key tooth 304 and the key slot 407 can be directly disconnected, and the first transmission shaft 402 and the second transmission shaft 405 can be pulled out and separated from the side wall opening of the hopper 1, which is convenient for installation and maintenance.

[0021] like Figure 4As shown in the figure: since ferrous metals such as iron, nickel, etc. are easily exploded when mixed with ammonium nitrate due to impact and extrusion, in order to prevent ferrous metals from being mixed into the porous granular ammonium nitrate when feeding, an iron removal rod 6 is provided under the screen 5. The iron removal rod 6 includes an outer copper sleeve 601 and a permanent magnet rod 602 penetrated inside. The iron removal rod 6 penetrates from the opposite side walls of the hopper 1 and is arranged under the screen 5 in a staggered manner. The porous granular ammonium nitrate passing under the screen 5 can fully contact with the iron removal rod 6, thereby absorbing the ferromagnetic metal mixed therein. A fixing ear 603 is fixedly provided at one end of the sleeve 601 outside the hopper 1, and the fixing ear 603 is screwed in The bolt is fixed to the outer wall of the hopper 1, and the outer copper sleeve 601 is in contact with the porous granular ammonium nitrate, which reduces the risk of explosion. At the same time, the internal permanent magnet rod 602 can adsorb the ferromagnetic metal on the outer wall of the sleeve 601 to prevent iron powder in the material, debris of iron tools, etc. from entering the screw conveyor 2 below; after the feeding is completed, when it is necessary to clean the ferromagnetic metal adsorbed on the outer wall of the sleeve 601, just remove the bolts on the fixing ear 603, remove the iron rod 6 from the hopper 1 as a whole, and pull out the internal permanent magnet rod 602. The ferromagnetic metal adsorbed on the outer wall of the sleeve 601 loses its magnetic attraction and can fall off automatically, which is easy to operate.

Claims

1. A porous granular ammonium nitrate feeding device, characterized in that: The invention comprises a hopper (1), a screw conveyor (2), a bag breaking mechanism (3) and a driving mechanism (4); the hopper (1) has an opening at the top, the discharge port at the bottom of the hopper (1) is sealed and connected to the feed port of the screw conveyor (2); two bag breaking mechanisms (3) are swingably arranged in the upper part of the hopper (1); the bag breaking mechanisms (3) comprise bag breaking claws (301) and swing arms (302) fixed at both ends of the bag breaking claws (301); the bag breaking claws (301) are provided with protrusions (303); and two groups of driving mechanisms (4) connected to the upper ends of the swing arms (302) of the corresponding bag breaking mechanisms (3) are arranged on the outside of the hopper (1).

2. A porous granular ammonium nitrate feeding device according to claim 1, characterized in that: The driving mechanism (4) comprises a first driving mechanism connected to one of the bag breaking mechanisms (3), and a second driving mechanism connected to the other bag breaking mechanism (3); the first driving mechanism comprises a first driving arm (401), a first transmission shaft (402) and a first cylinder (403); the second driving mechanism comprises a second driving arm (404), a second transmission shaft (405) and a second cylinder (406); one end of the first transmission shaft (402) passes through the side wall of the hopper (1) and is clamped with the swing arm (302) of one of the bag breaking mechanisms (3); the other end of the first transmission shaft (402) is clamped with the first The upper end of the driving arm (401) is fixedly connected, the lower end of the first driving arm (401) is hinged to the telescopic end of the first cylinder (403), and the fixed end of the first cylinder (403) is hinged to the outer wall of the hopper (1); one end of the second transmission shaft (405) coaxially passes through the first transmission shaft (402) and is clamped with the swing arm (302) of another bag breaking mechanism (3), the other end of the second transmission shaft (405) is fixedly connected to the upper end of the second driving arm (404), the lower end of the second driving arm (404) is hinged to the telescopic end of the second cylinder (406), and the fixed end of the second cylinder (406) is hinged to the outer wall of the hopper (1).

3. A porous granular ammonium nitrate feeding device according to claim 2, characterized in that: A keyway (407) is provided at a position where the first transmission shaft (402) and the second transmission shaft (405) are connected to the swing arm (302), and a key tooth (304) is provided at the upper end of the swing arm (302). The first transmission shaft (402) and the second transmission shaft (405) are fixedly connected to the swing arm (302) via the keyway (407) and the key tooth (304).

4. A porous granular ammonium nitrate feeding device according to claim 3, characterized in that: A screen (5) is horizontally installed in the hopper (1) below the bag breaking claw (301).

5. A porous granular ammonium nitrate feeding device according to claim 4, characterized in that: The invention also comprises an iron removal rod (6), which comprises an outer copper sleeve (601) and a permanent magnet rod (602) inserted inside. The iron removal rod (6) is inserted from two opposite side walls of the hopper (1) and arranged in a staggered manner below the screen (5). A fixing ear (603) is fixedly provided at one end of the sleeve (601) outside the hopper (1), and the fixing ear (603) is fixed to the outer wall of the hopper (1) by bolts.

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