Automatic bag opening device for woven bags containing solid chemicals

Abstract

The utility model discloses an automatic bag opening device for a woven bag containing solid chemicals. The automatic bag opening device comprises a fixed seat; the fixing base is a support with the longitudinal section of an inverted-T-shaped structure, a magnetic coupling rodless air cylinder is fixed to the fixing base, the movement direction of a sliding table on the air cylinder is the horizontal direction, a connecting plate frame of a bent metal plate structure is fixed to the sliding table, and the upper portion of the connecting plate frame is connected with a rotating air cylinder with the horizontal rotating axis. A cutter handle is fixed to the rotating end of the rotating cylinder, and a cutter is detachably connected to the end, away from the rotating cylinder, of the cutter handle; the bag cutting device has the advantages that the phenomenon that the cutting knife is stuck during bag cutting operation can be reduced; the consumable cutting knife is convenient to replace; due to horizontal reciprocating motion, the bag cutting efficiency is improved; by adopting the magnetic coupling rodless cylinder, the occupied space is reduced, and the safety production efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of chemical bag unpacking, and particularly relates to an automatic bag opening device for woven bags containing solid chemicals. Background Art

[0002] Ammonium nitrate is the main raw material for industrial explosives. During the production process, ammonium nitrate needs to be taken out of the bagged packaging. This process is usually completed manually. However, ammonium nitrate is very easy to absorb moisture during storage. After absorbing moisture, it will recrystallize, causing the granular or powdered ammonium nitrate to form lumps of material, which is not conducive to unpacking and taking out. Therefore, it needs to be broken and opened before it can be taken out for use.

[0003] In order to deal with the agglomerated ammonium nitrate in bags currently produced, CN215464617U discloses a solid ammonium nitrate crushing and bag-opening device, including a box, the inner bottom wall of the box is provided with a feed pipe with one end extending to the bottom thereof, a bag-opening knife is provided on the left side of the inner wall of the box, a transmission component is provided on the left side of the box with one end penetrating and extending to the right side thereof and located on both sides of the bag-opening knife, a crushing box located below the transmission component is provided between the left and right sides of the inner wall of the box, and a driving component is provided between the left and right sides of the inner wall of the box and located between the transmission component and the crushing box. The solid ammonium nitrate crushing and bag-opening device drives the first crankshaft to rotate by setting a second motor, the first crankshaft rotates synchronously with the second crankshaft through a movable rod, and the first crankshaft and the second crankshaft respectively drive the crushing box to shake up and down through two connecting rods while intermittently approaching the crushing teeth, thereby crushing the ammonium nitrate block.

[0004] The above-mentioned comparative document does not limit the knife direction of the bag opening knife. When the knife direction of the bag opening knife and the direction of relative movement of the bag opening knife and the woven bag are at an acute angle or a vertical angle, the "barb" phenomenon is likely to occur. When the "barb" phenomenon occurs, the solid chemicals in the woven bag are compacted or dense (the above-mentioned comparative document mentioned that ammonium nitrate is prone to compaction and agglomeration), the cutting knife is likely to be stuck due to the "barb", which affects the bag cutting efficiency in mild cases and can cause damage to the cutting knife in severe cases, and even cause the cutting knife to break, splash and injure people. Therefore, the existing technology requires a bag opening machine that can reduce the phenomenon of cutting knife sticking during bag cutting operations. Utility Model Content

[0005] The utility model aims to provide an automatic bag opening device for woven bags containing solid chemicals, so as to solve the problem that the cutting knife is easily stuck in the above-mentioned background technology.

[0006] The above technical objectives of the utility model are achieved through the following technical solutions:

[0007] An automatic bag opening device for woven bags containing solid chemicals comprises: a fixed seat; the fixed seat is a bracket with an inverted T-shaped structure in longitudinal section, a cylinder is fixed on the fixed seat, the movement direction of the slide on the cylinder is horizontal, a connecting plate frame with a bent metal sheet metal structure is fixed on the slide, a rotating cylinder with a horizontal rotating axis is connected to the upper part of the connecting plate frame, a knife handle is fixed to the rotating end of the rotating cylinder, and a cutting knife is detachably connected to the end of the knife handle away from the rotating cylinder.

[0008] Furthermore, in order to prevent dust accumulation from affecting the movement of the cylinder, the cylinder is a magnetically coupled rodless cylinder.

[0009] Furthermore, in order to enable the cutting knife to perform bag opening operations when it moves back and forth, both sides of the cutting knife are sharpened to form a double-sided blade.

[0010] Furthermore, in order to facilitate the replacement and maintenance of the cutting knife, the end of the knife handle away from the rotating cylinder is provided with an inwardly concave groove to form a knife groove, and the end of the cutting knife away from the double-sided blade is a sheet-like structure. The insert is embedded in the knife groove, and a clamping plate with a longitudinal section profile consistent with the longitudinal section profile of the knife groove is provided in the knife groove. At least one group of threaded holes is provided on the clamping plate, and a through hole concentric with the threaded hole is provided in the knife groove. The knife clamp bolt of the bolt structure penetrates the through hole and the insert is screwed into the threaded hole, so that the insert is clamped between the clamping plate and the knife groove.

[0011] Furthermore, in order to achieve the goal of not removing the knife clamping bolt and the clamping plate when replacing the cutting knife, thereby saving the knife changing process, a semi-slot-shaped reserved groove is provided on the insert of the cutting knife. When the insert is inserted into the gap between the clamping plate and the knife groove, the knife clamping bolt will not limit the insertion of the insert due to the existence of the reserved groove.

[0012] Furthermore, in order to save the occupied volume of the utility model, the upper part of the connecting plate frame is horizontally bent toward the fixing seat side to shield the upper part of the cylinder, and then vertically bent upward to be fixedly connected with the rotating cylinder.

[0013] Furthermore, in order to adjust the cutting depth of the woven bag by the cutting knife, the part where the connecting plate frame is connected to the rotating cylinder is provided with at least two groups of vertical strip-shaped slots, and the rotating cylinder is fixed in the slot by a knife clamping bolt with a bolt structure. The overall height of the rotating cylinder, the knife handle and the cutting knife can be adjusted by loosening or tightening the knife clamping bolt, thereby adjusting the cutting depth of the woven bag by the cutting knife.

[0014] Furthermore, in order to enable the utility model to adaptively adjust the angle of the handle when hardened chemicals are required, the end of the handle away from the cutting knife adopts a fixed disk of a disc structure and is concentrically connected with the rotating end of the rotating cylinder, and a torsion spring is provided between the fixed disk and the rotating end of the rotating cylinder.

[0015] In summary, the utility model has the following beneficial effects:

[0016] ① The phenomenon of the cutter getting stuck during the bag cutting operation can be reduced. By setting up the rotating cylinder and the knife handle, the rotating cylinder drives the knife handle and the cutter to deflect as a whole, so that the deflection direction of the knife handle and the cutter as a whole and the direction in which the knife handle and the cutter are about to move are obtusely distributed, so as to avoid the knife handle and the cutter as a whole and the direction in which the knife handle and the cutter are about to move being at an acute angle or a vertical angle, thereby preventing the "barb" phenomenon from occurring. When the "barb" phenomenon occurs, if the solid chemicals in the woven bag are compacted or dense, the cutter is easily stuck due to the "barb". When the deflection direction of the knife handle and the cutter as a whole and the direction in which the knife handle and the cutter are about to move are adjusted to an obtuse angle, the external pneumatic control mechanism drives the cylinder to work, and the cylinder drives the slide thereon to move toward the other side of the original slide position, and then the double-sided blade on the cutter cuts the bag surface of the woven bag to complete the woven bag unpacking operation, which can largely avoid the cutter getting stuck by compacted or dense solid chemicals.

[0017] ② The cutting knife can be replaced quickly and conveniently: through the establishment of the insert, knife slot and clamping piece, when the cutting knife needs to be replaced or repaired, loosen the knife clamping bolt, and the clamping piece and the knife slot can be loosened to pull the blade and the insert as a whole out of the knife slot, and then insert the new cutting knife or the repaired cutting knife in the form of inserting the insert into the knife slot, and then re-lock the knife clamping bolt to complete the replacement or repair of the cutting knife. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 It is a side structural schematic diagram of the utility model;

[0020] Figure 3 yes Figure 1 A magnified schematic diagram of the structure in the middle;

[0021] Figure 4 It is a schematic diagram of the cooperation principle of the knife handle and the cutting knife in the utility model;

[0022] Figure 5 It is a schematic diagram of the use structure of the utility model;

[0023] Figure 6 It is a schematic diagram of the cutting direction of the cutting knife in the utility model.

[0024] In the figure, 1, fixed seat; 2, cylinder; 3, slide; 4, connecting plate frame; 5, rotating cylinder; 6, knife handle; 7, cutting knife; 8, height adjustment bolt; 9, knife clamp bolt; 10, conveying mechanism; 11, woven bag; 41, slot hole; 61, knife groove; 62, clamping plate; 63, perforation; 64, threaded hole; 65, fixed plate; 66, torsion spring; 71, double-sided blade; 72, insert; 73, reserved slot. DETAILED DESCRIPTION

[0025] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0026] Example:

[0027] See also Figure 1-Figure 6 The utility model provides a technical solution: an automatic bag opening device for woven bags containing solid chemicals, comprising: a fixed seat 1; the fixed seat 1 is a bracket with an inverted T-shaped structure in longitudinal section, a cylinder 2 is fixed on the fixed seat 1, the movement direction of the slide 3 on the cylinder 2 is horizontal, a connecting plate frame 4 with a bent metal sheet metal structure is fixed on the slide 3, a rotating cylinder 5 with a horizontal rotating axis is connected to the upper part of the connecting plate frame 4, a knife handle 6 is fixed to the rotating end of the rotating cylinder 5, and a cutting knife 7 is detachably connected to the end of the knife handle 6 away from the rotating cylinder 5.

[0028] The cylinder 2 is a magnetically coupled rodless cylinder.

[0029] The cutting knife 7 has sharpened blades on both sides to form a double-sided blade 71 .

[0030] The end of the knife handle 6 away from the rotating cylinder 5 is provided with a concave groove to form a knife groove 61, and the end of the cutting knife 7 away from the double-sided blade 71 is a sheet-like structure insert 72, which is embedded in the knife groove 61. The knife groove 61 is provided with a clamping sheet 62 whose longitudinal section profile is consistent with the longitudinal section profile of the knife groove 61, and at least one group of threaded holes 64 is provided on the clamping sheet 62. The knife groove 61 is provided with a through hole 63 concentric with the threaded hole 64, and the knife clamp bolt 9 of the bolt structure penetrates the through hole 63 and the insert 72 and is screwed into the threaded hole 64, so that the insert 72 is clamped between the clamping sheet 62 and the knife groove 61.

[0031] The inserting piece 72 of the cutting knife 7 is provided with a semi-notch-shaped reserved groove 73. When the inserting piece 72 is inserted into the gap between the clamping piece 62 and the knife groove 61, the knife clamping bolt 9 will not limit the insertion of the inserting piece 72 due to the existence of the reserved groove 73.

[0032] The upper portion of the connecting plate frame 4 is horizontally bent toward the side of the fixing seat 1 to shield the upper portion of the cylinder 2 , and then vertically bent upward to be fixedly connected to the rotating cylinder 5 .

[0033] The portion where the connecting plate frame 4 is connected to the rotating cylinder 5 is provided with at least two groups of vertical strip-shaped slots 41. The rotating cylinder 5 is fixed in the slots 41 by a knife clamping bolt 9 of a bolt structure. The overall height of the rotating cylinder 5, the knife handle 6, and the cutting knife 7 can be adjusted by loosening or tightening the knife clamping bolt 9, thereby adjusting the cutting depth of the woven bag by the cutting knife 7.

[0034] The end of the knife handle 6 away from the cutting knife 7 is connected concentrically with the rotating end of the rotary cylinder 5 by a fixed disk 65 with a disc structure, and a torsion spring 66 is provided between the fixed disk 65 and the rotating end of the rotary cylinder 5.

[0035] First embodiment (no torsion spring 66 is provided between the fixed plate 65 and the rotating end of the rotary cylinder 5): When in use, the cylinder 2 and the rotary cylinder 5 are externally connected to a pneumatic control mechanism, such as Figure 5 , Figure 6 As shown, the unpacking operation of the batch of woven bags 11 is completed through the following three steps:

[0036] Step 1: The woven bag 11 containing solid chemicals is transported by the external conveying mechanism 10 to the top of the cutting knife 7, and the rotating cylinder 5 is driven to rotate. The rotating cylinder 5 drives the handle 6 and the cutting knife 7 to deflect as a whole, so that the deflection direction of the handle 6 and the cutting knife 7 as a whole and the direction in which the handle 6 and the cutting knife 7 are about to move are obtusely distributed, so as to avoid the handle 6 and the cutting knife 7 as a whole and the direction in which the handle 6 and the cutting knife 7 are about to move are acute or vertical angles, resulting in a "barb" phenomenon. When the "barb" phenomenon occurs, the solid chemicals in the woven bag 11 are hardened or dense, and the cutting knife 7 is easily stuck due to the "barb". When the deflection direction of the handle 6 and the cutting knife 7 as a whole and the direction in which the handle 6 and the cutting knife 7 are about to move are adjusted to an obtuse angle, the external pneumatic control mechanism drives the cylinder 2 to work, and the cylinder 2 drives the slide 3 thereon to move to the other side of the original slide 3 position (such as Figure 6 As shown), the double-sided blade 71 on the cutting knife 7 cuts the bag surface of the woven bag 11 to complete the woven bag unpacking operation.

[0037] Step 2: When a bag of woven bag 11 ( Figure 6 After the unpacking operation of the previous group of woven bags 11 is completed, the conveying mechanism 10 will carry the next bag of woven bags 11 ( Figure 6 In the figure, b indicates that the next group of woven bags 11 is transported to the top of the cutting knife 7, and then the rotating cylinder 5 drives the handle 6 and the cutting knife 7 to deflect as a whole, so that the deflection direction of the handle 6 and the cutting knife 7 as a whole and the direction in which the handle 6 and the cutting knife 7 are about to move are distributed at an obtuse angle, avoiding the generation of the "barb" phenomenon, and then the above steps are combined to complete the unpacking operation of the next bag of woven bags 11.

[0038] Step 3: Repeat the steps 1 and 2 to complete the unpacking operation of the batch of woven bags 11.

[0039] When the cutting knife 7 needs to be replaced or repaired, the knife clamping bolt 9 is loosened, and the clamping piece 62 and the knife groove 61 are loosened, so that the blade 71 and the inserting piece 72 can be pulled out from the knife groove 61 as a whole, and then a new cutting knife 7 or a repaired cutting knife 7 is inserted into the knife groove 61 in the form of inserting the inserting piece 72, and then the knife clamping bolt 9 is re-locked to complete the replacement or repair of the cutting knife 7; when the cutting depth of the cutting knife 7 needs to be adjusted, the overall height of the rotating cylinder 5, the knife handle 6, and the cutting knife 7 can be adjusted by loosening and tightening the knife clamping bolt 9, and then the knife clamping bolt 9 is re-locked to adjust the cutting depth of the cutting knife 7 on the woven bag.

[0040] The second embodiment (a torsion spring 66 is provided between the fixed disk 65 and the rotating end of the rotating cylinder 5): The second embodiment is consistent with the basic scheme of the first embodiment, and the only difference is that a torsion spring 66 is provided between the fixed disk 65 and the rotating end of the rotating cylinder 5, and the angle of the knife handle can be adaptively adjusted, that is to say, the cutting knife 7 in this embodiment can avoid jumping of the knife by itself when encountering hardened chemicals under the action of the torsion spring 66, and can reset itself when encountering non-hardened chemicals under the action of the torsion spring 66. Since the bag surface of the woven bag is always located at the outermost part of the woven bag, and under the action of the torsion spring 66, even if the cutting knife 7 jumps, it can always keep in contact with the bag surface of the woven bag and complete the bag cutting operation it should complete.

[0041] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. An automatic bag opening device for woven bags containing solid chemicals, comprising: A fixed seat (1); characterized in that: the fixed seat (1) is a bracket with an inverted T-shaped longitudinal section, a cylinder (2) is fixed on the fixed seat (1), the movement direction of the slide (3) on the cylinder (2) is horizontal, a connecting plate frame (4) with a bent metal sheet structure is fixed on the slide (3), the upper part of the connecting plate frame (4) is connected to a rotating cylinder (5) with a horizontal rotation axis, a knife handle (6) is fixed to the rotating end of the rotating cylinder (5), and a cutting knife (7) is detachably connected to the end of the knife handle (6) away from the rotating cylinder (5).

2. The automatic bag opening device for woven bags containing solid chemicals according to claim 1 is characterized in that: The cylinder (2) is a magnetically coupled rodless cylinder.

3. The automatic bag opening device for woven bags containing solid chemicals according to claim 1 is characterized in that: Both sides of the cutting knife (7) are sharpened to form a double-sided blade (71).

4. The automatic bag opening device for woven bags containing solid chemicals according to claim 3 is characterized by: The end of the knife handle (6) away from the rotary cylinder (5) is provided with an inwardly concave groove to form a knife groove (61); the end of the cutting knife (7) away from the double-sided blade (71) is a sheet-shaped insert (72), which is embedded in the knife groove (61); a clamping sheet (62) having a longitudinal section profile consistent with the longitudinal section profile of the knife groove (61) is provided in the knife groove (61); at least one group of threaded holes (64) is provided on the clamping sheet (62); a through hole (63) concentric with the threaded hole (64) is provided in the knife groove (61); a knife clamping bolt (9) of a bolt structure penetrates the through hole (63) and the insert (72) and is screwed into the threaded hole (64), so that the insert (72) is clamped between the clamping sheet (62) and the knife groove (61).

5. The automatic bag opening device for woven bags containing solid chemicals according to claim 4 is characterized in that: A semi-notch-shaped reserved groove (73) is provided on the inserting piece (72) of the cutting knife (7). When the inserting piece (72) is inserted into the gap between the clamping piece (62) and the knife groove (61), the knife clamping bolt (9) will not limit the insertion of the inserting piece (72) due to the existence of the reserved groove (73).

6. The automatic bag opening device for woven bags containing solid chemicals according to claim 1, characterized in that: The upper portion of the connecting plate frame (4) is horizontally bent toward the side of the fixing seat (1) to shield the upper part of the cylinder (2), and then vertically bent upward to be fixedly connected to the rotating cylinder (5).

7. The automatic bag opening device for woven bags containing solid chemicals according to claim 1, characterized in that: The portion where the connecting plate frame (4) and the rotary cylinder (5) are connected is provided with at least two groups of vertical strip-shaped slot holes (41), and the rotary cylinder (5) is fixed in the slot holes (41) by a knife clamping bolt (9) of a bolt structure.

8. The automatic bag opening device for woven bags containing solid chemicals according to claim 1, characterized in that: The end of the knife handle (6) away from the cutting knife (7) is coaxially connected to the rotating end of the rotary cylinder (5) by a fixed disk (65) with a circular disk structure, and a torsion spring (66) is provided between the fixed disk (65) and the rotating end of the rotary cylinder (5).

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