Automatic in-situ filtering and drying device for explosive powder

Abstract

The invention discloses an automatic in-situ filtering and drying device for explosive powder, and relates to the technical field of automatic drying of powder of energetic materials such as explosives and powders. A mounting cavity is formed in the drying and filtering box, and an opening is formed in the top of the drying and filtering box; the two sides of the drying and filtering box are rotationally connected to the rack through rotating shafts. The plurality of drying and filtering modules are arranged in the mounting cavity; the feeding hole is formed in an opening in the top of the drying and filtering box; the sealing cover is movably connected to the feeding hole; and the pneumatic vibrator is arranged at the lower part of the drying and filtering box.

Description

Technical Field

[0001] The invention relates to the technical field of automatic drying of powder of energetic materials such as explosives, and more particularly to an automatic in-situ filtering and drying device for explosive powder. Background Art

[0002] Explosives need to be stored for a long time during use, and have high requirements for the water content of explosives. Generally, the water content should not exceed 0.1%. It is an existing explosive. Explosives are flammable and explosive energetic materials that may cause explosions under the stimulation of external electrical energy, mechanical energy, etc. Therefore, the drying technology commonly used in the drying industry may not be suitable for explosive drying.

[0003] In order to ensure the safety of the explosives drying process, the industry has widely adopted the method of filtering the explosive materials to a certain moisture content, then manually packing the wet materials into aluminum trays, and then placing the aluminum trays with a certain thickness of materials on the partitions of the vacuum drying cabinet. When drying, start the vacuum pump to pump the vacuum pressure in the drying cabinet to no less than -0.05MPa, and pass hot water with a temperature not exceeding 90°C into the partitions. After 7 to 8 hours of drying, the moisture content of the explosives can be less than 0.1%, and finally the explosive powder in the tray is manually collected into the packaging box. This method is an intermittent production method, with little impact and friction on the materials, and a low drying risk. It is widely used in the drying of various types of explosives. However, there are also the following problems.

[0004] 1. Filtration and drying are step-by-step intermittent production lines, which cannot achieve continuous production;

[0005] 2. The production process requires manual intervention, such as palletizing, loading, collecting and boxing. In particular, the danger of dried explosives is greater than that of undried explosives, and personnel are exposed to high-risk environments;

[0006] 3. The existing process is difficult to automate. Automatic filtration, automatic plate separation, automatic entry and exit of the drying cabinet, and automatic material collection all require large and complex devices. The drying process belongs to a high-level explosion-proof area, and electrical equipment is difficult to enter, making automation difficult to achieve.

[0007] 4. The utilization efficiency of the vacuum drying cabinet is low, the drying process is static drying, the heat transfer surface is small, and a long drying time is required.

[0008] 5. The required drying cabinet is large, and there is an uneven temperature field, especially around the inside of the drying cabinet, where water droplets are prone to condense, which may contaminate local products after dripping. Summary of the invention

[0009] The purpose of the present invention is to provide an automatic in-situ filtering and drying device for explosive powder, in order to solve the technical problems in the background technology.

[0010] In order to achieve the above object, the present invention adopts the following technical solutions:

[0011] An automatic in-situ filtering and drying device for explosive powder, comprising:

[0012] A frame, the frame plays a supporting role;

[0013] A drying and filtering box, wherein a mounting cavity is provided in the drying and filtering box and the top is open;

[0014] Both sides of the drying filter box are rotatably connected to the frame via a rotating shaft;

[0015] Drying and filtering modules, a plurality of said drying and filtering modules are arranged in said installation cavity;

[0016] A feed inlet, the feed inlet being installed at the top opening of the drying and filtering box;

[0017] A sealing cover, the sealing cover is movably connected to the feed port;

[0018] A pneumatic vibrator is arranged at the lower part of the drying and filtering box.

[0019] In some embodiments, the drying and filtering module includes a heating cavity, the heating cavity has a cavity, a filter plate is provided in the cavity to divide the cavity into a vacuum zone and a drying zone, wherein the vacuum zone is a closed area, solid, liquid and water materials cannot enter, and a vacuum and back-blowing port is reserved at the bottom of the vacuum zone; the top opening of the heating cavity opposite to the drying zone is set.

[0020] In some embodiments, the heating chamber includes two upper and lower heating partitions, support plates on the left and right sides and the bottom, and a heating flow channel is reserved inside the heating partition. The upper heating partition is provided with a heating medium inlet, and the lower heating partition is provided with a heating medium outlet. The heating medium enters the heating flow channel through the heating medium inlet for circulation and then returns to the heater through the heating medium outlet for temperature-controlled heating.

[0021] In some embodiments, the heating medium inlets and outlets of several drying and filtering modules are connected in series or in parallel to realize the flow of the heating medium, which enters the heater through a unified pipeline for circulation and temperature control.

[0022] In some embodiments, a plurality of drying and filtering modules are connected in parallel to achieve a unified access of the vacuum pumping and back-blowing ports to an external vacuum system and a back-blowing system.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. The heating partition has a higher heat transfer efficiency, which can significantly improve the drying efficiency. The heat transfer area during the drying process is also larger than that of the traditional drying cabinet, which can shorten the drying time.

[0025] 2. The temperature field of the drying and filtration module is relatively uniform, and there is no cold area that causes condensed water droplets to affect product quality.

[0026] 3. The filtration and drying process is carried out continuously, and the production process does not require human intervention. The filtration, drying and material collection process are unmanned and automated.

[0027] 4. The inlet and outlet ports can be easily connected with the upstream and downstream to achieve automatic connection, which facilitates the full automation of the production process.

[0028] 5. The drying and filtration module is modularly designed, and the capacity can be adjusted according to the amount of material. If a single module is damaged, it can be quickly replaced.

[0029] 6. The box structure is easy to process, and the actuator used can be pneumatic or hydraulic to meet the explosion-proof requirements of the drying process. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the automatic in-situ filtering and drying device for explosive powder of the present invention.

[0031] Figure 2 A top view of the drying filter module.

[0032] Figure 3 It is a structural schematic diagram of the drying and filtering module.

[0033] Illustration: 1-cover, 2-feed port, 3-drying filter module, 4-rotating shaft, 5-frame, 6-drying filter box, 7-pneumatic vibrator, 8-filter plate, 9-mounting flange, 10-heating partition, 11-support plate, 12-drying area, 13-heating flow channel, 14-vacuuming area, 15-heating medium inlet, 16-vacuuming and backblowing port, 17-heating medium outlet. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be described in more detail below in conjunction with the drawings in the preferred embodiments of the present application. In the drawings, the same or similar reference numerals throughout represent the same or similar parts or parts with the same or similar functions. The described embodiments are part of the embodiments of the present application, not all of the embodiments. The embodiments described below with reference to the drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limitations on the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present application.

[0035] The embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0036] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, or it can be an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0037] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are orientations or positional relationships based on the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0038] In addition, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, for example, a process, method, system, product, or display that includes a series of steps or elements is not necessarily limited to those steps or elements explicitly listed but may include other steps or elements not explicitly listed or inherent to such process, method, product, or display.

[0039] The following will be combined Figure 1-3 , an automatic in-situ filtration and drying device for explosive powder involved in the embodiment of the present application is described in detail. It is worth noting that the following embodiments are only used to explain the present application and do not constitute a limitation of the present application.

[0040] Embodiment 1:

[0041] like Figure 1 As shown, an automatic in-situ filtering and drying device for explosive powder includes: a frame 5, a drying and filtering box 6, a drying and filtering module 3, a feed port 2, a cover 1, and a pneumatic vibrator 7. The frame 5 plays a supporting role; a mounting cavity is provided in the drying and filtering box 6, and the top is open; the opening of the drying and filtering box 6 is a circular hopper-type feed port 2, which is convenient for solid, liquid and water materials to enter the drying and filtering box 6.

[0042] The two sides of the drying filter box 6 are rotatably connected to the frame 5 through a rotating shaft; the rotating shaft 4 is located at the center of mass of the box body, and the box body can be rotated with a small torque. The drying filter box 6 has a certain structural strength and can withstand an external pressure of one atmosphere. Several drying filter modules 3 are arranged in the installation cavity; the feed port 2 is installed at the top opening of the drying filter box 6; the cover 1 is movably connected to the feed port 2; a cover 1 on the top realizes the cover 1 of the mouth of the drying filter box 6 through an actuator such as a cylinder, and a temperature sensor, a pressure sensor, and a spray ball can be reserved for installation on the cover 1, which are used to detect the temperature, vacuum and cleaning in the box body respectively. The pneumatic vibrator 7 is arranged at the lower part of the drying filter box 6.

[0043] According to the amount of dry material, several groups of dry filter modules 3 are designed and installed in the dry filter box 6. Dry filter modules 3 of different sizes are designed according to different application scenarios. There is good sealing between the dry filter module 3 and the dry filter box 6 body, and between the dry filter modules 3 and the dry filter modules 3. Solid, liquid and water materials can only enter the cavity inside the dry filter module 3, and cannot enter the installation gap between the dry filter module 3 and the dry filter box 6 and between the dry filter modules 3 and the dry filter modules 3.

[0044] See also Figure 2-3 The drying and filtering module 3 includes a heating cavity, which has a cavity. A filter plate 8 is arranged in the cavity to divide the cavity into a vacuum zone 14 and a drying zone 12. The vacuum zone 14 is a closed area, and solid, liquid and water materials cannot enter. A vacuum and back-blowing port 16 is reserved at the bottom of the vacuum zone 14. The top opening of the heating cavity facing the drying zone 12 is arranged. The filter plate 8 allows water and gas to pass through, but does not allow solid materials to pass through.

[0045] The drying and filtering module 3 is installed on the drying and filtering box 6 through the mounting flanges 9 on both sides. The drying and filtering modules 3 are installed side by side and tightly, so that solid, liquid and water materials cannot enter the drying and filtering box 6. The length and width of the drying and filtering module 3 are designed according to the amount of material, wherein the height of the drying area 12 does not exceed 20mm, which is used to control the material layer thickness of the drying area 12. The drying and filtering module 3 is made of conductive metal materials with good heat transfer performance and stable performance, such as stainless steel or aluminum. The upper and lower heating partitions 10 use microchannel flow channel heat exchange plates to improve heat exchange efficiency.

[0046] The heating chamber includes two upper and lower heating partitions 10, and support plates 11 on the left and right sides and the bottom. A heating flow channel 13 is reserved inside the heating partition 10. The upper heating partition 10 is provided with a heating medium inlet 15, and the lower heating partition 10 is provided with a heating medium outlet 17. The heating medium enters the heating flow channel 13 through the heating medium inlet 15 for circulation and then returns to the heater through the heating medium outlet 17 for temperature control heating.

[0047] In some embodiments, the heating medium inlets and outlets of several drying and filtering modules 3 are connected in series or in parallel to realize the flow of heating medium, and enter the heater through a unified pipeline for circulation and temperature control. Several drying and filtering modules 3 are connected in parallel to realize the vacuuming and back-blowing ports 16 to be uniformly connected to the external vacuum system and back-blowing system.

[0048] The working process of this application is as follows:

[0049] First, the drying filter box 6 is vertically upward, the cover 1 has been opened and lifted by the cylinder, and the solid, liquid and water materials that have been washed at the front end flow into the box feed port 2 by pumping or self-weight. The vacuum device is turned on to reduce the pressure in the vacuum zone 14. Under the pressure difference between the inside and outside, water enters the vacuum zone 14 through the filter plate 8 and is continuously pumped out of the outside, and the material remains in the drying zone 12.

[0050] After several drying and filtering modules 3 are filled with materials, the cover 1 is pneumatically pushed down to the mouth of the feed inlet 2, and the spray ball is turned on to flush the residual materials at the feed inlet 2 into the drying and filtering module 3. The drying and filtering module 3 continuously vacuums and filters the cleaning water. After cleaning, the cover 1 covers the mouth, and the vacuum is continuously sucked during the period. Under the action of the external atmospheric pressure and the cylinder, the cover 1 evenly blocks the feed inlet 2. Then, the rotating shaft 4 is driven by an external driving device to rotate the box to a horizontal position, and the pneumatic vibration hammer is started to evenly spread the internal materials. The driving device can be a motor.

[0051] Keep the vacuum state, pneumatic water heating circulator, hot water not exceeding 90℃ continuously flows in the heating channel 13 inside the heating partition 10, and transfers heat to the dried material through the heating partition 10. The moisture on the surface of the material evaporates into gas under the dual effects of heating and vacuuming, and is discharged with the vacuum system. During the drying process, the pneumatic vibration hammer can be started according to the process requirements to make the material vibrate slightly to accelerate the drying.

[0052] After the drying time is up, continue to rotate the box downward by 10-60 degrees, dock the circular discharge port with the external silo or the feed port 2 of the automatic metering and packaging device, slowly open the cover 1, start the pneumatic vibration hammer as needed, and the material in the drying area 12 slowly enters the collection bin through the circular feed port 2. The discharge speed can be controlled according to the rotation angle, and the gap between the cover 1 and the discharge port can also be used to control the discharge speed. The pneumatic vibration hammer can vibrate and pour out the material in the dead corner. The vacuum and back-blowing port 16 is passed through a pulsed air blow to blow out the residual material.

[0053] After the discharge is completed, the rotating mechanism rotates the box to a vertical state, starts the cleaning spray ball on the cover 1, and cleans the feed port 2 and the filter drying module. The vacuum and back-blowing port 16 introduces pulsed gas to clean the filter drying module and the filter screen. After the cleaning is completed, the rotating mechanism flips the box to discharge the washing water in the box, realizing the automatic cleaning of the drying and filtering module 3.

[0054] The above description is only a preferred embodiment of the present invention and is used to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An automatic in-situ filtering and drying device for explosive powder, characterized in that: include: A frame, the frame plays a supporting role; A drying and filtering box, wherein a mounting cavity is provided in the drying and filtering box and the top is open; Both sides of the drying filter box are rotatably connected to the frame via a rotating shaft; Drying and filtering modules, a plurality of said drying and filtering modules are arranged in said installation cavity; A feed inlet, the feed inlet being installed at the top opening of the drying and filtering box; A sealing cover, the sealing cover is movably connected to the feed port; A pneumatic vibrator is arranged at the lower part of the drying and filtering box.

2. The automatic in-situ filtration and drying device for explosive powder according to claim 1, characterized in that: The drying and filtering module comprises a heating cavity, which has a cavity. A filter plate is arranged in the cavity to divide the cavity into a vacuum zone and a drying zone, wherein the vacuum zone is a closed area, solid, liquid and water materials cannot enter, and a vacuum and back-blowing port is reserved at the bottom of the vacuum zone; the top opening of the heating cavity opposite to the drying zone is arranged.

3. The automatic in-situ filtration and drying device for explosive powder according to claim 2, characterized in that: The heating cavity includes two upper and lower heating partitions, support plates on the left and right sides and the bottom, and a heating flow channel is reserved inside the heating partition. The upper heating partition is provided with a heating medium inlet, and the lower heating partition is provided with a heating medium outlet. The heating medium enters the heating flow channel through the heating medium inlet for circulation and then returns to the heater through the heating medium outlet for temperature-controlled heating.

4. The automatic in-situ filtration and drying device for explosive powder according to claim 3, characterized in that: The heating medium inlets and outlets of several drying and filtering modules are connected in series or in parallel to realize the flow of the heating medium, and enter the heater through a unified pipeline for circulation temperature control.

5. The automatic in-situ filtration and drying device for explosive powder according to claim 4, characterized in that: Several drying and filtering modules are connected in parallel to realize the unified access of vacuum pumping and back-blowing ports to the external vacuum system and back-blowing system.

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