A multi-stage screening device for emulsion explosive raw materials
By using a multi-stage screening structure with conical chambers and mesh plates, along with a brush cleaning device, the multi-stage screening and clogging problems of existing emulsion explosive raw material screening devices are solved, achieving efficient and reliable screening results and improving the production quality and safety of emulsion explosives.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HEILONGJIANG YINFENG CHEM (GRP) CO LTD
- Filing Date
- 2025-08-12
- Publication Date
- 2026-07-03
AI Technical Summary
Existing emulsion explosive raw material screening devices have a simple structure, making it difficult to achieve multi-stage particle size screening. They also have low screening efficiency and are prone to clogging, which affects the production quality and safety of emulsion explosives.
It adopts a two-stage screening structure of conical bins and screen plates, combined with brush cleaning and auger discharge, to achieve multi-stage screening and automated discharge, prevent clogging, and precisely control the power through a PLC controller.
It improves screening accuracy and efficiency, prevents clogging, ensures raw material particle size meets requirements, simplifies maintenance, and improves production efficiency and safety.
Smart Images
Figure CN224443651U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the technical field of emulsion explosive production equipment, specifically a multi-stage screening device for emulsion explosive raw materials. Background Technology
[0002] In the production of emulsion explosives, the particle size of the raw materials plays a decisive role in the quality and performance of the emulsion explosives. The raw materials of emulsion explosives include a variety of non-sticky materials. If the particle size of these materials is uneven, it will seriously interfere with the emulsification effect of the emulsion explosives, resulting in poor product stability, reduced explosive performance, and even production safety hazards. However, the existing emulsion explosive raw material screening devices on the market generally have the problem of simple structure, which can only complete the screening operation of a single particle size. It is difficult to meet the strict requirements of multi-stage particle size screening of raw materials in the production of emulsion explosives. Moreover, these devices have low screening efficiency and lack an effective removal mechanism for impurities generated during the screening process, which can easily cause screen blockage, frequently affect the normal operation of the screening device, significantly shorten its service life, and thus increase production and maintenance costs, seriously restricting the efficient and high-quality production of emulsion explosives. Summary of the Invention
[0003] To address the problems existing in the background technology, this utility model provides a multi-stage screening device for emulsion explosive raw materials.
[0004] To achieve the above objectives, the present invention adopts the following technical solution: a multi-stage screening device for emulsion explosive raw materials, comprising a shell, a feed pipe, an external gear ring, gears, a motor, a conical chamber, an electronic valve, a screen plate, a shovel plate, a connecting rod, a shovel plate, a cleaning mechanism, and a discharge mechanism;
[0005] The upper end of the housing is provided with a through hole. The outer wall of the feed pipe is rotatably connected to the inner wall of the through hole through a sealed bearing. The external gear ring is fixedly fitted on the feed pipe and meshes with a gear. The gear is fixedly connected to the output shaft of motor one. Motor one is fixed on the housing. The lower end of the feed pipe is connected and fixedly connected to the conical chamber. The outer wall of the conical chamber is a filter screen. The outer wall of the conical chamber is fitted with the cleaning mechanism. The cleaning mechanism is fixed inside the housing. The lower end of the conical chamber is connected to the discharge mechanism through an electronic valve. The discharge mechanism seals and penetrates the screen plate and the lower end of the housing in sequence. The screen plate is horizontally fixed inside the housing. The first shovel plate is fixedly connected to the discharge mechanism. The lower end of the second shovel plate is fitted and slidably disposed with the upper surface of the screen plate. The lower end of the second shovel plate is fitted and slidably disposed with the inner bottom surface of the housing. The upper end of the second shovel plate is fixedly connected to the second connecting rod. The second connecting rod is fixedly connected to the discharge mechanism.
[0006] The discharge mechanism includes a connecting pipe 1, a connecting pipe 2, an auger, and a motor 2;
[0007] The first connecting pipe is fixedly connected to the electronic valve. The first connecting pipe rotates through the mesh plate and is rotatably connected to the second connecting pipe through a sealed bearing. The outer wall of the first connecting pipe is sealed to the mesh plate through the sealed bearing. The first connecting pipe is fixed with a first shovel plate and a second shovel plate. The second connecting pipe extends out of the housing. The second connecting pipe is an L-shaped pipe with its horizontal end located outside the housing. The second connecting pipe is sealed and fixed to the housing. The auger is vertically installed inside the first and second connecting pipes and is fixedly connected to the output shaft of the second motor. The second motor is fixed to the outer wall of the second connecting pipe.
[0008] The cleaning mechanism includes a connecting rod and a brush;
[0009] One end of the connecting rod is fixedly connected to the inner wall of the housing, and the other end of the connecting rod is detachably connected to the brush. The brush is slidably fitted against the outer wall of the conical chamber.
[0010] The housing is equipped with an inspection door, a first sealing door, and a second sealing door.
[0011] The inspection door is located at the cleaning mechanism and is used for inspecting or replacing the brush. The first sealing door is located above the screen plate and is used for cleaning the area above the screen plate. The second sealing door is located below the screen plate and is used for removing the screened raw materials.
[0012] The mesh size of the filter screen on the conical chamber is larger than that of the mesh plate.
[0013] Compared with the prior art, the beneficial effects of this utility model are:
[0014] 1. High-efficiency multi-stage screening: This device adopts a two-stage screening structure of conical bin filter screen and mesh plate, and the mesh size of the conical bin filter screen is larger than that of the mesh plate, which can classify and screen emulsion explosive raw materials to ensure that the particle size of the raw materials meets the production requirements, effectively improving the accuracy and efficiency of screening.
[0015] 2. Anti-clogging design: During the rotary screening process in the conical hopper, the outer wall of the hopper slides relative to the fixed brush. The brush is made of nylon 66 bristles, which has moderate hardness and appropriate length. It can continuously clean the material adhering to the filter screen, prevent the filter screen from clogging, and ensure the smooth progress of the screening process.
[0016] 3. Automated discharge: Through the cooperation of electronic valve, motor 2 and auger, the discharge of coarse particles is realized. When it is necessary to discharge coarse particles in the conical bin, PLC controller 2 sends a command to open the electronic valve, start motor 2 to drive the auger, and transport the coarse particles from connecting pipe 1 to the discharge device in connecting pipe 2. The operation is simple and efficient.
[0017] 4. Comprehensive raw material processing: The first shovel plate is fixedly connected to the first connecting pipe of the discharge mechanism. It rotates synchronously with the first shovel plate to spread the raw material on the screen plate evenly, so that fine particles can pass through the screen plate smoothly to complete the secondary screening; the second shovel plate pushes the fine particles that fall into the bottom of the shell to the second sealing door, so that the screened finished raw material can be taken out.
[0018] 5. Easy to maintain and clean: The device is equipped with an inspection door, a first sealing door, and a second sealing door. The inspection door is located at the cleaning mechanism for easy maintenance or replacement of the brushes; the first sealing door is located above the screen plate for easy cleaning of residual raw materials on the screen plate; the second sealing door is located below the screen plate for removing the screened raw materials, making the device more convenient to maintain and clean, reducing downtime and improving production efficiency.
[0019] 6. Precise power control: Motor 1 is preferably a stepper motor and connected to PLC controller 1. It can execute preset programs to control forward and reverse rotation, effectively preventing raw material accumulation and further enhancing the screening effect. Through precise power control, the stability and reliability of screening work are guaranteed.
[0020] In summary, this utility model, with its innovative structural design, complete functional configuration, and convenient maintenance features, significantly improves screening efficiency and quality, realizes automated material discharge and precise power control, and provides an efficient, reliable, and easy-to-maintain solution for the screening and processing of emulsion explosive raw materials. It has high practical value and promotional significance. Attached Figure Description
[0021] Figure 1 This is a schematic diagram of the structure of this utility model; Detailed Implementation
[0022] The technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of the utility model, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the protection scope of this utility model.
[0023] This embodiment describes a multi-stage screening device for emulsion explosive raw materials, including a shell 1, a feed pipe 2, an external gear ring 3, a gear 4, a motor 5, a conical chamber 6, an electronic valve 7, a mesh plate 9, a shovel plate 10, a connecting rod 15, a shovel plate 16, a cleaning mechanism, and a discharge mechanism.
[0024] The upper end of the housing 1 is provided with a through hole. The outer wall of the feed pipe 2 is rotatably connected to the inner wall of the through hole through a sealed bearing. The outer gear ring 3 is fixedly fitted on the feed pipe 2 and meshes with the gear 4. The gear 4 is fixedly connected to the output shaft of the motor 5. The motor 5 is fixed on the housing 1. The lower end of the feed pipe 2 is connected and fixedly connected to the conical chamber 6. The outer wall of the conical chamber 6 is a filter screen. The outer wall of the conical chamber 6 is fitted with the cleaning mechanism. The cleaning mechanism is fixed inside the housing 1. The lower end of the conical chamber 6 is connected to the discharge mechanism through an electronic valve 7. The discharge mechanism seals and penetrates the mesh plate 9 and the lower end of the housing 1 in sequence. The mesh plate 9 is horizontally fixed inside the housing 1. The first shovel plate 10 is fixedly connected to the discharge mechanism. The lower end of the first shovel plate 10 is fitted and slidably fitted with the upper surface of the mesh plate 9. The lower end of the second shovel plate 16 is fitted and slidably fitted with the inner bottom surface of the housing 1. The upper end of the second shovel plate 16 is fixedly connected to the second connecting rod 15. The second connecting rod 15 is fixedly connected to the discharge mechanism.
[0025] The material discharge mechanism includes a connecting pipe 8, a connecting pipe 17, an auger 18, and a motor 19.
[0026] The first connecting pipe 8 is connected and fixed to the electronic valve 7. The first connecting pipe 8 rotates through the mesh plate 9 and is rotatably connected to the second connecting pipe 17 through a sealed bearing. The outer wall of the first connecting pipe 8 is sealed to the mesh plate 9 through the sealed bearing. The first shovel plate 10 and the second shovel plate 16 are fixed on the first connecting pipe 8. The second connecting pipe 17 extends out of the housing 1. The second connecting pipe 17 is an L-shaped pipe, and its horizontal end is located outside the housing 1. The second connecting pipe 17 is sealed and fixed to the housing 1. The auger 18 is vertically installed inside the first connecting pipe 8 and the second connecting pipe 17 and is fixedly connected to the output shaft of the second motor 19. The second motor 19 is fixed on the outer wall of the second connecting pipe 17.
[0027] The cleaning mechanism includes a connecting rod 13 and a brush 14;
[0028] One end of the connecting rod 13 is fixedly connected to the inner wall of the housing 1, and the other end of the connecting rod 13 is detachably connected to the brush 14. The brush 14 is slidably fitted against the outer wall of the conical chamber 6.
[0029] The housing 1 is provided with an inspection door 12, a first sealing door 11 and a second sealing door 20;
[0030] The inspection door 12 is located at the cleaning mechanism and is used for inspecting or replacing the brush 14. The first sealing door 11 is located above the screen plate 9 and is used for cleaning the area above the screen plate 9. The second sealing door 20 is located below the screen plate 9 and is used to remove the screened raw materials.
[0031] The mesh size of the filter screen on the conical chamber 6 is larger than the mesh size of the screen plate 9.
[0032] When using this utility model, the emulsion explosive raw material to be screened (a non-sticky raw material) is injected into the conical chamber 6 through the feed pipe 2. At this time, the electronic valve 7 is in the closed state to prevent the raw material from entering the discharge mechanism directly without screening. The motor 5 (preferably a stepper motor with a rated power of 1.5kW and a speed range of 0-1500r / min) is started by an external power supply. The motor 5 is connected to an external PLC controller (preferably a Siemens S7-1200 CPU 1214C, supporting Profinet communication) to execute a preset program to control the forward and reverse rotation of the motor, prevent the raw material from accumulating and enhance the screening effect. The motor 5 drives the gear 4 to rotate, which in turn drives the outer gear ring 3 that meshes with it to rotate. Since the outer gear ring 3 is fixed on the feed pipe 2, the feed pipe 2 and the conical chamber 6 will rotate synchronously. Under the action of centrifugal force generated by the rotation of the conical chamber 6, the raw material diffuses to the outside of the conical chamber 6. Particles with a particle size smaller than the mesh size of the filter screen of the conical chamber 6 will pass through the filter screen and fall onto the screen plate 9, completing the first-stage screening.
[0033] During the rotation of the conical chamber 6, its outer wall slides relative to the fixed brush 14 (the brush 14 is preferably made of nylon 66 bristles with a hardness of 80±5 Shore D). The length is preferably a length that matches the outer wall of the conical chamber 6. This is used to continuously clean the adhesive material on the filter screen and prevent clogging. The brush 14 is detachably connected to the connecting rod 13 for easy replacement when needed. The material after primary screening falls onto the screen plate 9. The shovel plate 10 is fixedly connected to the connecting pipe 8 of the discharge mechanism and rotates synchronously with it. The shovel plate 10 spreads the material on the screen plate 9 evenly, so that the fine particles that meet the requirements of secondary screening can pass through the screen plate 9 smoothly and fall into the bottom of the shell 1. The shovel plate 2 16 is also fixedly connected to the discharge mechanism and rotates with it. The shovel plate 2 16 pushes the fine particles that have fallen into the bottom of the shell 1 to the sealing door 20. By opening the sealing door 20, the screened finished material can be taken out.
[0034] When it is necessary to discharge coarse particles from the conical chamber 6, an instruction is sent through the external PLC controller 2 (preferably Siemens S7-200 SMART CPU SR40, supporting Modbus RTU) to open the electronic valve 7, start the motor 2 19 through the external power supply, and drive the auger 18 to rotate in the connecting pipe 1 8 and the connecting pipe 2 17. The auger 18 transports the coarse particles from the conical chamber 6 from the connecting pipe 1 8 to the L-shaped connecting pipe 2 17, and finally discharges them from the device.
[0035] When cleaning is required, open the sealing door 11 to clean the residual raw materials on the mesh plate 9. When it is necessary to repair the electronic valve 7 or replace the brush 14, open the inspection door 12 to perform the corresponding operations.
[0036] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of the equivalents of the claims are intended to be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.
Claims
1. A multi-stage screening device for emulsion explosive raw materials, characterized in that: Includes housing (1), feed pipe (2), external gear ring (3), gear (4), motor one (5), conical chamber (6), electronic valve (7), mesh plate (9), shovel plate one (10), connecting rod two (15), shovel plate two (16), cleaning mechanism and discharge mechanism; The upper end of the housing (1) is provided with a through hole. The outer wall of the feed pipe (2) is rotatably connected to the inner wall of the through hole through a sealed bearing. The outer gear ring (3) is fitted and fixed on the feed pipe (2). The outer gear ring (3) meshes with the gear (4). The gear (4) is fixedly connected to the output shaft of the motor (5). The motor (5) is fixed on the housing (1). The lower end of the feed pipe (2) is connected and fixed to the conical chamber (6). The outer wall of the conical chamber (6) is a filter screen. The outer wall of the conical chamber (6) is fitted with the cleaning mechanism. The cleaning mechanism is fixed on the housing (1). Inside, the lower end of the conical bin (6) is connected to the discharge mechanism via an electronic valve (7). The discharge mechanism seals the lower end of the mesh plate (9) and the shell (1) in sequence. The mesh plate (9) is horizontally fixed inside the shell (1). The first shovel (10) is fixedly connected to the discharge mechanism. The lower end of the first shovel (10) is slidably attached to the upper surface of the mesh plate (9). The lower end of the second shovel (16) is slidably attached to the inner bottom surface of the shell (1). The upper end of the second shovel (16) is fixedly connected to the second connecting rod (15). The second connecting rod (15) is fixedly connected to the discharge mechanism.
2. The multi-stage screening device for emulsion explosive raw materials according to claim 1, characterized in that: The discharge mechanism includes a first connecting pipe (8), a second connecting pipe (17), an auger (18), and a second motor (19). The first connecting pipe (8) is connected and fixed to the electronic valve (7). The first connecting pipe (8) rotates through the mesh plate (9) and is rotatably connected to the second connecting pipe (17) through the sealed bearing. The outer wall of the first connecting pipe (8) is sealed to the mesh plate (9) through the sealed bearing. The first connecting pipe (8) is fixed with the first shovel plate (10) and the second shovel plate (16). The second connecting pipe (17) extends out of the shell (1). The second connecting pipe (17) is an L-shaped pipe with its horizontal end located outside the shell (1). The second connecting pipe (17) is sealed and fixed to the shell (1). The auger (18) is vertically installed inside the first connecting pipe (8) and the second connecting pipe (17) and is fixedly connected to the output shaft of the second motor (19). The second motor (19) is fixed on the outer wall of the second connecting pipe (17).
3. The multi-stage screening device for emulsion explosive raw materials according to claim 1, characterized in that: The cleaning mechanism includes a connecting rod (13) and a brush (14). One end of the connecting rod (13) is fixedly connected to the inner wall of the housing (1), and the other end of the connecting rod (13) is detachably connected to the brush (14). The brush (14) is slidably fitted against the outer wall of the conical chamber (6).
4. The multi-stage screening device for emulsion explosive raw materials according to claim 1, characterized in that: The housing (1) is provided with an inspection door (12), a first sealing door (11) and a second sealing door (20). The inspection door (12) is located at the cleaning mechanism and is used to inspect or replace the brush (14). The first sealing door (11) is located above the screen plate (9) and is used to clean the area above the screen plate (9). The second sealing door (20) is located below the screen plate (9) and is used to remove the screened raw materials.
5. The multi-stage screening device for emulsion explosive raw materials according to claim 1, characterized in that: The mesh size of the filter screen on the conical chamber (6) is larger than the mesh size of the screen plate (9).