Intrinsically-safe crushing device and method for recycled waste ladder black powder blocks

Abstract

The invention discloses an intrinsically-safe crushing device and method for recycled waste ladder black powder blocks. The intrinsically-safe crushing device comprises a rotary heating and melting unit, a leveling, thinning and cooling unit and a conductive rubber extruding and crushing unit. An outlet of the rotary heating and melting unit communicates with an inlet of the leveling, thinning and cooling unit, the conductive rubber extruding and crushing unit is located over an outlet of the leveling, thinning and cooling unit, and the device and method can achieve safe crushing of the black powder blocks.

Description

Technical Field

[0001] The invention belongs to the technical field of crushing, and relates to an intrinsically safe crushing device and method for recycling waste ladder black medicine blocks. Background Art

[0002] As the main explosive of early ground blasting equipment and other ammunition, pyrotechnics has begun to be retired and scrapped in large quantities as its service life expires. In order to recycle and reuse the waste pyrotechnics in retired and scrapped ground blasting equipment, domestic ammunition destruction manufacturers mainly use ammunition cutting devices such as water jets or rollers to cut the metal or plastic shell of the ground blasting equipment to pick out the blocks of pyrotechnics. The pyrotechnics blocks recovered from ground blasting equipment are usually large in size, usually in the range of φ5×10cm to φ20cm×30cm, with irregular shapes, and most of the blocks have edges and corners; due to the limitations of the original charging process technology, there are also varying numbers of charging defects inside these blocks; and during the long-term storage of pyrotechnics, affected by the ambient temperature, its components have also migrated, all of which have led to a significant decrease in the safety of the recycled waste pyrotechnics blocks in terms of friction and impact sensitivity.

[0003] In order to solve this problem, jaw crushers are mainly used for crushing in China. This method, which relies on mechanical hard extrusion and friction, has significant safety hazards in the process of crushing waste black medicine blocks. Therefore, this crushing method has not been widely promoted and used in the industry.

[0004] At present, the main method of crushing the block of tungsten black medicine reported is mechanical extrusion, which is to apply pressure exceeding the compressive strength of the crushed block to cause the block to crack and break. For large-sized blocks, multiple extrusions are required to gradually crush them from large to small to form blocks that meet the use requirements. In the process of hard extrusion of the blocks, there must be friction. For waste tungsten black medicine blocks with component migration and charging defects, the existing crushing method will have serious safety hazards. Summary of the invention

[0005] The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art and to provide an intrinsically safe device and method for recycling waste ladder black powder blocks, which can achieve safe crushing of ladder black powder blocks.

[0006] In order to achieve the above-mentioned purpose, the present invention discloses an intrinsically safe device for recycling waste ladder black medicine blocks, comprising a rotary heating and melting unit, a leveling thinning and cooling unit and a conductive rubber extrusion and crushing unit;

[0007] The outlet of the rotary heating and melting unit is connected with the inlet of the leveling, thinning and cooling unit, and the conductive rubber extrusion and crushing unit is located directly above the outlet of the leveling, thinning and cooling unit.

[0008] Furthermore, the rotary heating and melting unit includes a material melting and mixing pot with a high-pressure superheated working fluid jacket, a plurality of baffles are arranged in the material melting and mixing pot, a bracket is arranged at the bottom of the material melting and mixing pot, the high-pressure superheated working fluid jacket is connected to a heating working fluid circulation machine, a feeding port is arranged at one end of the material melting and mixing pot, and a discharge port is arranged at the other end of the material melting and mixing pot.

[0009] Furthermore, the number of the baffles is four, and the four baffles are equally spaced in the radial direction inside the material melting and mixing pot.

[0010] Furthermore, the temperature inside the material melting pot in the rotary heating and melting unit is 90-120°C; after the material melting pot stops rotating, the inclination angle of the discharge port is -30° to 60°; the rotation speed of the material melting pot is 0r / min to 100r / min.

[0011] Furthermore, the leveling, thinning and cooling unit includes a flexible transmission belt, a motor group, two rollers and a water bath cooling jacket arranged on the flexible transmission belt, the flexible transmission belt is sleeved on the two rollers, and the output shaft of the motor group is connected to one of the rollers.

[0012] Furthermore, the thickness of the flexible conveyor belt is 1 mm to 1.5 mm, the movement speed of the flexible conveyor belt is 1 m / s to 3 m / s; and the temperature of the water bath cooling jacket is 15° C. to 35° C.

[0013] Furthermore, the conductive rubber extrusion and crushing unit includes a motor, a bracket and a conductive rubber punch, wherein the motor is fixed on the bracket, and the output shaft of the motor is connected to the conductive rubber punch.

[0014] Furthermore, the diameter of the conductive rubber punch is in the range of 5 cm to 10 cm, the impact pressure of the motor-driven conductive rubber punch is 1 kg to 3 kg, and the impact frequency of the motor-driven conductive rubber punch is 120 s. -1 ~180s -1 .

[0015] Furthermore, a material recovery box is provided at the outlet of the flexible conveyor belt.

[0016] The invention discloses an intrinsically safe method for recycling and crushing waste tungsten black explosive blocks, comprising the following steps: firstly, the tungsten black explosive is sent into a rotating heating and melting unit for stirring and heating and melting, and the shape of the tungsten black explosive and the uniformity of the components are changed by thermal action, and then the tungsten black explosive is sent into a leveling, thinning and cooling unit, in which the tungsten black explosive is cooled and thinned by the action of force, and then it is subjected to one-time flexible extrusion and crushing by a conductive rubber extrusion and crushing unit.

[0017] The present invention has the following beneficial effects:

[0018] The intrinsically safe device and method for recycling waste tungsten black explosive blocks described in the present invention adopts the intrinsically safe thermal coupling crushing technology principle during specific operation, and solves the problem of increased component migration sensitivity of tungsten black explosive due to long-term storage by melting and mixing block materials, and then thins and solidifies the materials to greatly reduce the compressive strength of the materials. The materials are then crushed to ensure safe and efficient crushing, and the crushed materials are further improved in terms of component uniformity and mechanical sensitivity. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0020] Figure 1 It is a structural diagram of the present invention;

[0021] Figure 2 This is a schematic diagram of the black medicine block after crushing. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] In the description of the present invention, it should be understood that the terms “include” and “comprises” indicate the presence of described features, wholes, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or collections thereof.

[0024] It should also be understood that the terms used in the present specification are only for the purpose of describing specific embodiments and are not intended to limit the present invention. As used in the present specification and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include plural forms.

[0025] It should be further understood that the term "and / or" used in the present specification and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes these combinations. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in the present invention generally indicates that the associated objects are in an "or" relationship.

[0026] It should be understood that, although the terms first, second, third, etc. may be used to describe preset ranges, etc. in the embodiments of the present invention, these preset ranges should not be limited to these terms. These terms are only used to distinguish preset ranges from each other. For example, without departing from the scope of the embodiments of the present invention, the first preset range may also be referred to as the second preset range, and similarly, the second preset range may also be referred to as the first preset range.

[0027] The word "if" as used herein may be interpreted as "at the time of" or "when" or "in response to determining" or "in response to detecting", depending on the context. Similarly, the phrases "if it is determined" or "if (stated condition or event) is detected" may be interpreted as "when it is determined" or "in response to determining" or "when detecting (stated condition or event)" or "in response to detecting (stated condition or event)", depending on the context.

[0028] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. The components of the embodiments of the present invention described and shown in the drawings here can usually be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0029] Various structural schematic diagrams of the embodiments disclosed in the present invention are shown in the accompanying drawings. These figures are not drawn to scale, and some details are magnified and some details may be omitted for the purpose of clear expression. The shapes of various regions and layers shown in the figures and the relative sizes and positional relationships therebetween are only exemplary, and may deviate in practice due to manufacturing tolerances or technical limitations, and those skilled in the art may additionally design regions / layers with different shapes, sizes, and relative positions according to actual needs.

[0030] The present invention adopts a thermal coupling crushing action mode to reduce the compressive strength of the ladder black medicine block and improve the component uniformity of the ladder black medicine block, so as to enhance the inherent safety of the waste ladder black medicine block during the crushing process. Regardless of the size of the waste ladder black medicine block being processed, it can be crushed in one time.

[0031] Specifically, refer to Figure 1 and Figure 2The intrinsically safe recycling device for crushing waste ladder black medicine blocks of the present invention comprises a rotary heating and melting unit, a leveling and thinning cooling unit and a conductive rubber extrusion and crushing unit;

[0032] The outlet of the rotary heating and melting unit is connected with the inlet of the leveling, thinning and cooling unit, and the conductive rubber extrusion and crushing unit is located directly above the outlet of the leveling, thinning and cooling unit.

[0033] The rotary heating and melting unit includes a material melting and mixing pot with a high-pressure superheated working fluid jacket, a plurality of baffles are arranged in the material melting and mixing pot, a bracket is arranged at the bottom of the material melting and mixing pot, the high-pressure superheated working fluid jacket is connected to a heating working fluid circulation machine, a feeding port is arranged at one end of the material melting and mixing pot, and a discharge port is arranged at the other end of the material melting and mixing pot. There are four baffles, and the four baffles are equally divided and arranged in the radial direction inside the material melting and mixing pot, wherein the ratio of the length of the baffle to the radial length of the material melting and mixing pot is 0.8:1, and the ratio of the length of the baffle to the width of the baffle is 1:15; the thickness of the baffle can meet the melting and mixing strength requirements, and the materials of the baffle and the inner wall of the material melting and mixing pot are copper.

[0034] As an embodiment of the present invention, the temperature inside the material melting pot in the rotary heating and melting unit is 90-120°C, after the material melting pot stops rotating, the inclination angle of the discharge port is -30° to 60°, and the rotation speed of the material melting pot is 0r / min to 100r / min.

[0035] The leveling, thinning and cooling unit includes a flexible conveyor belt, a motor group, two rollers and a water bath cooling jacket arranged on the flexible conveyor belt. The flexible conveyor belt is sleeved on the two rollers, the output shaft of the motor group is connected to one of the rollers, and the discharge port is located above the feeding side of the flexible conveyor belt.

[0036] As an embodiment of the present invention, the flexible transmission belt is made of copper or copper material, the thickness of the flexible transmission belt is 1mm~1.5mm, the movement speed of the flexible transmission belt is 1m / s~3m / s; the temperature of the water bath cooling jacket is 15℃~35℃.

[0037] The conductive rubber extrusion and crushing unit comprises a motor, a bracket and a conductive rubber punch, wherein the motor is fixed on the bracket, and the output shaft of the motor is connected to the conductive rubber punch.

[0038] As an embodiment of the present invention, the diameter of the conductive rubber punch is in the range of 5 cm to 10 cm, the impact pressure of the motor-driven conductive rubber punch is 1 kg to 3 kg, and the impact frequency of the motor-driven conductive rubber punch is 120 s. -1 ~180s -1 .

[0039] Accordingly, the intrinsically safe method for recycling waste ladder black medicine blocks of the present invention comprises the following steps:

[0040] The ladder black explosive is first sent to the rotating heating and melting unit for stirring and heating and melting, and the shape and uniformity of the ladder black explosive are changed by thermal action. Then it is sent to the leveling, thinning and cooling unit. In the leveling, thinning and cooling unit, the ladder black explosive is cooled and thinned by the action of force. Then it is subjected to one-time flexible extrusion and crushing by the conductive rubber extrusion and crushing unit, which completely solves the safety hazards of hard extrusion and hard friction in the traditional mechanical crushing process and achieves the purpose of intrinsically safe crushing of waste ladder black blocks.

[0041] Embodiment 1

[0042] This embodiment is used to continuously crush waste black powder blocks with a size of about φ20×30cm. The process parameters adopted are: heating and melting temperature is 120±5℃; flexible conveyor belt temperature is 15±5℃; material transmission rate is 1m / s; conductive rubber punch impact pressure is 3kg; conductive rubber punch impact frequency is 180s -1 .

[0043] Performance test: Impact sensitivity: Tested in accordance with GJB772A-1997 method 601.1.

[0044] Friction sensitivity: Tested in accordance with GJB772A-1997 method 602.1.

[0045] Embodiment 2

[0046] This embodiment is used to continuously crush waste black powder blocks with a size of about φ5×10cm. The process parameters adopted are: heating and melting temperature is 90±5℃; flexible conveyor belt temperature is 35±5℃; material transmission rate is 3m / s; conductive rubber punch impact pressure is 1kg; conductive rubber punch impact frequency is 120s -1 .

[0047] Performance test: Impact sensitivity: Tested in accordance with GJB772A-1997 method 601.1;

[0048] Friction sensitivity: Tested in accordance with GJB772A-1997 method 602.1.

[0049] The impact sensitivity and friction sensitivity of the waste tungsten black powder blocks after crushing according to the present invention are compared with those before crushing, and the results are shown in Table 1.

[0050] Table 1

[0051] Example Impact sensitivity, % Friction sensitivity, % Before breaking 80 72 Example 1 32 24 Example 2 24 24

[0052] Those skilled in the art will readily appreciate other embodiments of the present invention after considering the specification and disclosure of the invention. This application is intended to cover any variations, uses or adaptations of the present invention that follow the general principles of the present invention and include common knowledge or customary techniques in the art that are not disclosed by the present invention. The specification and examples are to be considered exemplary only, and the true scope and spirit of the present invention are indicated by the following claims.

[0053] It should be understood that the present invention is not limited to the exact construction that has been described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

[0054] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any way. Any simple modification, change and equivalent structural change made to the above embodiment based on the technical essence of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. An intrinsically safe device for recycling waste ladder black blocks, characterized in that: It includes a rotary heating and melting unit, a leveling, thinning and cooling unit and a conductive rubber extrusion and crushing unit; The outlet of the rotary heating and melting unit is connected with the inlet of the leveling, thinning and cooling unit, and the conductive rubber extrusion and crushing unit is located directly above the outlet side of the leveling, thinning and cooling unit.

2. The intrinsically safe device for recycling waste ladder black blocks according to claim 1 is characterized in that: The rotary heating melting unit comprises a material melting and mixing pot with a high-pressure superheated working medium jacket, a plurality of baffles are arranged in the material melting and mixing pot, a bracket is arranged at the bottom of the material melting and mixing pot, the high-pressure superheated working medium jacket is connected to a heating working medium circulation machine, a feeding port is arranged at one end of the material melting and mixing pot, and a discharge port is arranged at the other end of the material melting and mixing pot.

3. The intrinsically safe device for recycling waste ladder black blocks according to claim 2 is characterized in that: There are four baffles, which are equally spaced in the radial direction inside the material melting and mixing pot.

4. The intrinsically safe device for recycling waste ladder black blocks according to claim 2 is characterized in that: The temperature inside the material melting and mixing pot in the rotary heating and melting unit is 90-120°C; after the material melting and mixing pot stops rotating, the inclination angle of the discharge port is -30° to 60°; the rotation speed of the material melting and mixing pot is 0r / min to 100r / min.

5. The intrinsically safe device for recycling waste ladder black blocks according to claim 2 is characterized in that: The leveling, thinning and cooling unit comprises a flexible transmission belt, a motor group, two rollers and a water bath cooling jacket arranged on the flexible transmission belt. The flexible transmission belt is sleeved on the two rollers, and the output shaft of the motor group is connected to one of the rollers.

6. The intrinsically safe device for recycling waste ladder black blocks according to claim 2 is characterized in that: The thickness of the flexible conveyor belt is 1 mm to 1.5 mm, the movement speed of the flexible conveyor belt is 1 m / s to 3 m / s; the temperature of the water bath cooling jacket is 15° C. to 35° C.

7. The intrinsically safe device for recycling waste ladder black blocks according to claim 2 is characterized in that: The conductive rubber extrusion and crushing unit comprises a motor, a bracket and a conductive rubber punch, wherein the motor is fixed on the bracket, and the output shaft of the motor is connected to the conductive rubber punch.

8. The intrinsically safe device for recycling waste ladder black blocks according to claim 2 is characterized in that: The diameter of the conductive rubber punch is in the range of 5 cm to 10 cm, the impact pressure of the motor-driven conductive rubber punch is 1 kg to 3 kg, and the impact frequency of the motor-driven conductive rubber punch is 120 s. -1 ~180s -1 .

9. The intrinsically safe device for crushing waste ladder black blocks according to claim 2 is characterized in that: A material recovery box is provided at the outlet of the flexible conveyor belt.

10. An intrinsically safe method for recycling waste tungsten black blocks, characterized in that: The following steps are involved: The ladder black explosive is first sent to the rotating heating and melting unit for stirring and heating and melting, and the shape and uniformity of the ladder black explosive are changed by thermal action. Then it is sent to the leveling, thinning and cooling unit. In the leveling, thinning and cooling unit, the ladder black explosive is cooled and thinned by the action of force, and then it is subjected to one-time flexible extrusion and crushing by the conductive rubber extrusion and crushing unit.

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