A constant temperature drying box

Abstract

The present application relates to the technical field of explosive processing and production equipment, and specifically discloses a constant temperature drying box, including a drying box for drying explosives and having two openings at both ends, the bottom of the drying box being fixed to the ground by a bracket, and the two ends of the drying box being installed with a front panel for opening and closing and a rear panel for venting explosions, a cylinder being installed on the side of the bracket close to the front panel, the cylinder being hinged to the end face of the front panel, a rectangular air intake duct arranged transversely being provided at the top of the drying box, a slider sliding along the air intake duct being installed in the air intake duct, and a first through hole arranged transversely for air circulation being provided inside the slider. The purpose of this patent is to solve the problem that when the explosives in the drying box are taken out, the airflow entering the drying box has a relatively fast flow rate, and the airflow will blow up the explosives in the drying box, making it more troublesome to clean the drying box later.

Description

Technical Field

[0001] The invention relates to the technical field of explosive processing and production equipment, in particular to a constant temperature drying box. Background Art

[0002] Dinitrodiazophenol, abbreviated as DDNP, is a nitro derivative of phenol with a molecular formula of CH(NO)NO. The reason why DDNP is widely valued at home and abroad is mainly because it is an organic compound that does not contain heavy metals, has the power of a high explosive, and has good detonating performance; at the same time, dinitrodiazophenol also has the characteristics of high friction sensitivity, high electrostatic sensitivity, high impact sensitivity, and low production cost, so it is the most widely used and longest-lasting detonator in domestic detonator products. At the same time, such characteristics also bring great danger to the production process. DDNP has a power similar to that of a high explosive and has the performance of a detonator. Its explosion heat is: Q = 1400kJ / kg; explosion volume is: 600700L / kg; explosion temperature is: t = 4950℃; explosion velocity is: VD = 6600m / s. For the convenience of reading, DDNP can also be called detonator, agent or detonating agent in the following text.

[0003] According to the patent document of the external transmission type automatic production line of explosives with publication number CN203923049U, the DDNP explosive production line is recorded. The production of explosives goes through the processes of agent neutralization and reduction, diazotization (or combination), airing, drying, cooling, screening, boxing, packing and material transportation.

[0004] In the above-mentioned drying step of the explosive production, since the inductance of DDNP explosive is relatively high, the drying temperature needs to be controlled at 55°C. First, the introduction of the document ([1] Qiu Hongfei. Research on automatic heating control system for drying of intelligent energy-saving detonator DDNP explosive [J]. Journal of Longyan University, 2011, 29(2):4.) records that "traditional drying facilities include plate heat exchanger hot water heating system and vacuum dryer drying system". Secondly, in the Chinese patent with publication number CN103185488B, a method and device for online vacuum drying of explosives is disclosed, which records that "the vacuum dryer is set at the conveying detonator. In the production line of the drug dispensing tray, a roller conveyor belt is arranged in the vacuum dryer, so that the roller conveyor belt in the vacuum dryer and the roller conveyor of the detonating drug production line form a continuous conveying section. In the vacuum drying system recorded in the above-mentioned literature, the drying box is an important component of the vacuum drying system. During drying, the DDNP detonating drug is generally placed in the drying box, and then the drying box is evacuated. Through the water channel arranged on the inner wall of the drying box, the water in the water channel is heated, so that the temperature inside the drying box is increased and kept at a constant temperature. At this time, the drying box is in a constant temperature stage, and then the drugs in the drying box are dried. However, after the explosive in the drying box is dried, when taking out the explosive, the pressure in the drying box needs to be kept consistent with the external environmental pressure. Due to the pressure difference between the inside and outside of the drying box, when the drying box is turned on, the air flow from the outside will quickly enter the drying box to achieve a balance of the pressure inside and outside the drying box; however, during the air intake process in the drying box, due to the fast flow rate of the air flow, the air flow will blow part of the explosive in the drying box inside the drying box, which is more troublesome to clean; secondly, when the air in the environment is relatively humid, when the drying box is turned on, the humid air will affect the drying effect of the explosive in the drying box. Summary of the invention

[0005] In view of the shortcomings of the prior art, the present invention provides a constant temperature drying box, which first solves the problem that when the explosive in the drying box is taken out, the air flow rate entering the drying box is relatively fast, and the air flow will blow up the explosive in the drying box, making it more troublesome to clean the drying box later; secondly, it solves the problem that if the outside air is relatively humid, when the drying box is opened, the flow rate of the air flow will be low, and then the temperature of the air flow will be reduced, which will cause some small water droplets to condense in the air, thereby affecting the drying effect of the explosive.

[0006] In order to solve the above problems, the technical solution adopted by the present invention is:

[0007] A constant temperature drying box, comprising a drying box for drying explosives and having openings at both ends, the bottom end of the drying box being fixed to the ground by a bracket, a front panel for opening and closing and a rear panel for venting explosion being installed at both ends of the drying box, a cylinder being installed on the side of the bracket close to the front panel, the cylinder being hinged to the end face of the front panel, a rectangular air inlet duct arranged transversely being provided at the top of the drying box, a slider sliding along the air inlet duct being installed in the air inlet duct, a first through hole for air circulation and arranged transversely being provided inside the slider; an air inlet hole connected to the first through hole of the slider being provided at the top of the air inlet duct, a latch being inserted into the air inlet hole for sealing the interior of the drying box and locking the slider; a first chamber being provided on the left side of the slider, and a second chamber being provided on the right side of the slider; a desiccant for absorbing moisture in the water flow being provided on the side of the slider close to the first chamber.

[0008] The principle of this scheme is:

[0009] After the detonator in the drying box is dried, the drying box is in a vacuum state, and the latch is taken out. At this time, due to the large pressure difference between the inside of the drying box and the outside, the outside airflow will quickly enter the first chamber. However, due to the certain pressure difference between the first chamber and the second chamber, the airflow entering the first chamber will push the slider to move to the right and enter the second chamber through the first through hole of the slider. After the airflow passes through the two chambers, the flow rate of the airflow will gradually decrease. At this time, the two chambers can gradually decompose the pressure entering the drying box, and the pressure is reduced in a step-by-step manner to avoid the airflow entering the drying box too fast and blowing away the detonator inside the drying box; secondly, when air enters the first chamber in the drying box from the outside, the space of the first chamber rapidly increases due to the movement of the slider. At this time, due to the increase in space and the decrease in air internal energy, the temperature of the air is reduced. If there is moisture in the air, some small water droplets will condense in the air. At this time, the desiccant is provided to well absorb the water droplets in the air to avoid the water droplets containing moisture directly entering the drying box and affecting the drying effect of the detonator.

[0010] The beneficial effects of this program are:

[0011] 1. Compared with the prior art in which airtight doors with locking cylinders are respectively provided at both ends of the vacuum dryer, after the explosive in the drying box is dried, the airtight door is opened. Due to the certain pressure difference between the outside and the drying box, part of the airflow will instantly enter the drying box when the airtight door is opened, and the flow rate of the part of the airflow entering the drying box is relatively fast, which will impact the dried explosive and cause the explosive to fly around; while in the present application scheme, by setting a plurality of chambers, when the airflow enters the drying box, the flow rate of the airflow is reduced through the plurality of chambers, so that the airflow entering the drying box is slow and will not cause the explosive to be blown away. Secondly, during the drying process, there is a certain pressure difference between the pressure in the drying box and the outside. The pressure entering the drying box can be gradually reduced through the plurality of chambers to avoid the external pressure directly acting on the inside of the drying box. For example, if the outside air pressure is compared to "3" and the air pressure inside the drying box is compared to "1", when the outside airflow enters the first chamber, the airflow pressure becomes "2.5", and when the airflow enters the second chamber, the airflow pressure becomes "2", and when the airflow enters the third chamber, the airflow pressure becomes "1.5".

[0012] 2. Compared with the airtight door and drying box in the prior art, when the airtight door is open, the air flow rate is faster and the temperature of the air flow is lowered. If the air is relatively humid, in a relatively humid environment, the lowered air flow temperature will cause the humid air to condense into small water droplets, which will affect the drying effect of the explosive. In the present application, a desiccant is arranged inside the air inlet duct. When water droplets condense in the air flow entering the drying box, the desiccant can absorb the water droplets, so that the air flow entering the drying box is in a dry state, thereby preventing the explosive after drying from being affected by the humid air.

[0013] Furthermore, the slider is made of steel, and a first spring is provided on the side of the slider close to the first chamber. The spring is a compression spring. When the latch is taken out, the external airflow enters the air intake duct through the air intake hole. At this time, due to the pressure difference between the inside and outside of the drying box, the slider will move to the right. While the slider is moving, the first spring can also pull the slider to move. After contacting the vacuum environment in the drying box, the spring slider can pull the slider back to its initial position and insert the latch through the air hole to ensure the sealing state of the air intake duct in the drying box.

[0014] Furthermore, a positioning bead for positioning the slider is installed on the top of the second chamber, and a positioning groove matching the positioning bead is opened on the top of the slider; when the air flow enters the air intake duct from the outside, due to the pressure difference between the first chamber and the second chamber, the slider will move toward the second chamber, and the space of the second chamber will be reduced. At this time, the air flow in the first chamber will push the slider to continue to move toward the second chamber. In order to prevent the slider from hitting the right inner wall of the air intake duct, the positioning bead is used to limit the slider.

[0015] Furthermore, a third chamber is connected to the lower part of the second chamber, and an "L"-shaped air pipe is provided on the inner wall of the third chamber. The air pipe is divided into a vertical part and a horizontal part. The length of the vertical part of the air pipe is greater than the length of the horizontal part, and the top of the air pipe extends laterally into the drying box and is interconnected with the interior of the drying box. The third chamber is provided and an "L"-shaped air pipe is provided on the inner wall of the third chamber, so that the airflow entering the drying box can be decelerated. When the airflow passes through the longer vertical part of the air pipe, the passing path of the airflow can be extended, and the pressure of the airflow entering the second chamber can be gradually decomposed, thereby further balancing the pressure entering the drying box.

[0016] Furthermore, a box cover is connected to the side of the positioning bead close to the outer wall of the drying box, and the box cover is threadedly connected to the side wall of the drying box. When the drying box needs to dry the explosive, the inside of the drying box needs to be sealed. However, the slider cannot return to its initial position due to the action of the positioning bead. At this time, the box cover is unscrewed counterclockwise, and the positioning bead moves a distance to the outside of the drying box. At this time, the slider is released from the clamping state and returns to the initial position. After the slider returns to the initial position, the box cover is rotated clockwise to screw the positioning bead into the drying box.

[0017] Furthermore, a support is fixedly installed at the bottom end of the interior of the drying box, and a plurality of grooves for placing medicine cans containing explosives are opened on the support. The manipulator grabs the medicine cans containing explosives and places the medicine cans filled with explosives into the grooves of the support to prevent the medicine cans from shaking around during the drying of the explosives in the drying box.

[0018] Furthermore, the desiccant is stored in a drying box, and a plurality of evenly distributed pores are opened on the surface of the drying box. The drying box is fixed to a side of the slider close to the first chamber. The drying box can increase the airflow performance and also absorb the condensed moisture in the airflow. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the present invention;

[0020] Figure 2 It is a cross-sectional schematic diagram of a drying box of the present invention;

[0021] Figure 3 For the present invention Figure 2A is an enlarged schematic diagram.

[0022] The reference numerals in the drawings of the specification include:

[0023] Drying box 1, push rod 1-1, bracket 2, cylinder 3, front panel 4, rear panel 5, support 6, medicine tank 7, air inlet pipe 8, first chamber 8-1, second chamber 8-2, third chamber 8-3, air pipe 8-4, second through hole 8-5, slider 9, first spring 9-1, first through hole 9-2, air inlet hole 9-3, latch 10, desiccant 11, positioning beads 12, box cover 12-1, positioning groove 12-3. DETAILED DESCRIPTION

[0024] The following is further described in detail through specific implementation methods:

[0025] In the attached Figure 1 And attached Figure 2 In the figure, the front panel 4 is installed on the left side of the drying box 1, and the rear panel 5 is installed on the right side of the drying box 1, which is used as the direction basis.

[0026] The embodiment is basically as shown in the attached Figure 2 As shown:

[0027] When the explosive needs to be dried during the production process, the medicine tank 7 containing the explosive is placed into a drying box 1 with a constant temperature function by a robot. The constant temperature of the drying box 1 is achieved by setting a water channel in the interlayer of the drying box 1, and controlling the temperature of the water in the water channel to keep the drying box 1 in a constant temperature state. The bottom of the drying box 1 is fixedly connected to the ground by a bolted bracket 2. The left and right sides of the drying box 1 are open. A front panel 4 for closing the drying box 1 is placed on the left side of the drying box 1. The two side surfaces of the front panel 4 are fixedly connected to the outer wall of the drying box 1 through four movable push rods 1-1. The four movable push rods 1-1 are combined to form a parallelogram-like mechanism. At the same time, a cylinder 3 is movably hinged on the left side of the bracket 2. The output end of the cylinder 3 is hinged to the end face of the front panel 4. When the cylinder 3 is operating, the output end of the cylinder 3 and the four movable push rods 1-1 can drive the front panel 4 to move up and down to open the left end of the drying box 1; a spring is fixed on the top right side of the drying box 1, and the spring is a hook spring. Secondly, the right side of the drying box 1 is connected to a rear panel 5 for venting explosions. The top of the rear panel 5 is fixed to one end of the spring. Secondly, when the explosive in the drying box 1 is dried, the spring can tightly pull the rear panel 5.

[0028] A transversely arranged air intake duct 8 is fixed to the top of the inner wall of the drying box 1, and the air intake duct 8 is welded to the top of the inner wall of the drying box 1. A slider 9 is slidably connected inside the air intake duct 8. The slider 9 is made of steel, and a first through hole 9-2 is provided transversely therein. The slider 9 divides the air intake duct 8 into a first chamber 8-1 and a second chamber 8-2. The first through hole 9-2 connects the first chamber 8-1 and the second chamber 8-2. The first chamber 8-1 is located on the left side of the slider 9, and the second chamber 8-2 is located on the right side of the slider 9. A first spring 9-1 for pulling the slider 9 is installed in the chamber 8-1. The first spring 9-1 is a compression spring. One end of the first spring 9-1 is fixedly connected to the inner wall of the air intake duct 8, and the other end is fixed to the left end of the slider 9. An air intake hole 9-3 for air intake is opened on the top of the drying box 1. The air intake hole 9-3 is perpendicular to the air intake duct 8 and is interconnected with the first through hole 9-2. At the same time, a pin 10 that can seal the air intake through hole and fix the clamping slider 9 is inserted into the air intake duct 8. The air intake through hole can be completely blocked by the pin 10. When the medicine in the drying box 1 is dried and needs to be taken out, pull out the pin 10. At this time, due to the certain air pressure difference between the first chamber 8-1 and the second chamber 8-2, when the external airflow quickly enters the first chamber 8-1 through the air inlet, the slider 9 will also move quickly to the right side of the air inlet pipe 8. At this time, under the action of air pressure, the slider 9 moves to the right side of the air inlet pipe 8. At this time, the airflow directly enters the first through hole 9-2 from the air inlet and becomes the airflow passing through the air inlet, the first chamber 8-1, the first through hole 9-2 and the second chamber 8-2 in sequence.

[0029] A drying box equipped with a desiccant 11 is fixedly welded on the left end face of the slider 9, and a plurality of holes for ventilation are provided on the surface of the drying box. When the external airflow enters the first chamber 8-1, the slider 9 moves to the right, and the space of the first chamber 8-1 becomes larger. The internal energy of the air in the first chamber 8-1 is reduced, so that the temperature of the air is reduced, and some small water droplets will condense in the air entering the first chamber 8-1. When the small water in the airflow passes through the first channel, the drying box can absorb the small water droplets in the air in the first chamber 8-1, so as to ensure that the air entering the drying box 1 is dry. A hole is provided at the top right side of the air inlet duct 8, in which a positioning bead 12 is installed, the columnar part of the positioning bead 12 extends out of the drying box 1, and a box cover 12-1 is fixedly welded to the end of the positioning bead 12 extending out of the drying box 1, and the box cover 12-1 is threadedly connected to the outer wall of the drying box 1. By rotating the box cover 12-1 counterclockwise, the positioning bead 12 can be screwed out of the drying box 1, and by rotating the box cover 12-1 clockwise, the positioning bead 12 can be screwed into the drying box 1; at the same time, when sliding A positioning groove 12-3 is provided on the top right side wall of block 9, which can cooperate with the positioning bead 12 to clamp the slider 9. The positioning bead 12 and the positioning groove 12-3 can limit the moving stroke of the slider 9 to prevent the slider 9 from being pushed to the right side wall of the intake duct 8 under the action of the airflow, causing impact on the right side wall of the intake duct 8 and damaging the intake duct 8; a second spring for pulling the slider 9 is fixed between the right end of the slider 9 and the inner wall of the intake duct 8, and the second spring is a tension spring.

[0030] Arranging two chambers in the air inlet duct 8 can reduce the flow rate of the gas that quickly enters the drying box 1. Secondly, since there is a certain pressure difference between the external link and the inside of the drying box 1, using multiple chambers can gradually reduce the pressure of the gas entering the drying box 1, so that the pressure of the drying box 1 gradually approaches the pressure of the external environment, avoiding a sudden drop in pressure, which directly causes damage to the inside of the drying box 1

[0031] As attached Figure 2 As shown, the third chamber 8-3 is connected to the lower part of the second chamber 8-2, and the second chamber 8-2 and the third chamber 8-3 are connected through the second through hole 8-5. An "L"-shaped air pipe 8-4 is opened on the inner wall of the third chamber 8-3. The air pipe 8-4 is divided into a vertical part and a horizontal part. The longer vertical part of the air pipe 8-4 can further reduce the flow rate of the gas entering the drying box 1, and secondly can decompose the pressure of the air flow. The air pipe 8-4 connects the third chamber 8-3 and the inside of the drying box 1.

[0032] A support 6 for supporting a medicine can 7 containing explosives is fixedly installed at the bottom of the drying box 1 by bolts. A groove for accommodating the medicine can 7 is opened on the surface of the support 6. The medicine can 7 is placed in the groove to prevent the medicine can 7 from shaking when the drying box 1 dries the explosives.

[0033] The specific implementation process is as follows:

[0034] When in use, the cylinder 3 is started, and the front panel 4 is opened under the drive of the cylinder 3 and the four movable push rods 1-1. At this time, the manipulator grabs the medicine can 7 containing the explosive to be dried and puts it into the groove of the support 6 of the drying box 1 to clamp it, and then the air pipe 8-4 and the push rod 1-1 close the front panel 4; the interior of the drying box 1 is evacuated, and then the water in the water channel arranged on the inner wall of the drying box 1 is heated to keep the water temperature at 55°C. After the medicine in the drying box 1 is dried, the pressure inside the drying box 1 needs to be restored to the same pressure as the external environment. At this time, the pin 10 is pulled up by the manipulator, and the air flow enters the first through hole 9-2 arranged on the slider 9 in the inlet pipe through the air inlet hole 9-3. At the same time, the slider 9 slides to the right side of the air inlet duct 8 under the action of pressure, and the airflow is then changed from the first chamber 8-1 to the second chamber 8-2; due to the movement of the slider 9, the space in the first chamber 8-1 becomes larger and the space in the second chamber 8-2 decreases. At this time, the slider 9 is pushed, and while the slider 9 moves, the positioning groove 12-3 set on the top of the slider 9 is limited and stuck by the positioning bead 12; after the airflow enters the second chamber 8-2, it enters the third chamber 8-3 through the second through hole 8-5, and is discharged to the inside of the drying box 1 from the air pipe 8-4 connected to the third chamber 8-3. The use of multiple chambers not only reduces the flow rate of the airflow entering the drying box 1, but also gradually decomposes the pressure entering the drying box 1.

[0035] When the pressure inside the drying box 1 is consistent with the external pressure, start the cylinder 3, open the front panel 4, and use the manipulator to take out the dried explosive. At this time, the external pressure is consistent with the pressure inside the drying box 1. At this time, rotate the box cover 12-1 counterclockwise, and the positioning bead 12 moves upward. At this time, the slider 9 is released from the clamping state. Under the action of the first spring 9-1 connected to the slider 9, the slider 9 is moved to the initial position, and then the pin 10 is inserted to prepare for the next drying of the explosive.

[0036] The above is only an embodiment of the present invention, and the common knowledge such as the known specific structure and characteristics in the scheme is not described in detail here. It should be pointed out that for those skilled in the art, several deformations and improvements can be made without departing from the structure of the present invention, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A constant temperature drying box, comprising a drying box for drying explosives and having two openings at both ends, the bottom of the drying box being fixed to the ground by a bracket, and a front panel for opening and closing and a rear panel for venting explosion being installed at both ends of the drying box, characterized in that: A cylinder is installed on the side of the bracket close to the front panel, and the cylinder is hinged to the end face of the front panel. A horizontally arranged rectangular air inlet duct is provided at the top of the drying box, and a slider sliding along the air inlet duct is installed in the air inlet duct, and a first through hole for air circulation and arranged horizontally is provided inside the slider; an air inlet hole connected to the first through hole of the slider is provided at the top of the air inlet duct, and a latch is inserted into the air inlet hole to seal the inside of the drying box and lock the slider; the left side of the slider is the first chamber, and the right side of the slider is the second chamber; a desiccant for absorbing moisture in the water flow is provided on the side of the slider close to the first chamber, and the lower part of the second chamber is connected to the third chamber, and the inner side wall of the third chamber is provided with an "L"-shaped air pipe, which is divided into a vertical part and a horizontal part, the length of the vertical part of the air pipe is greater than the length of the horizontal part, and the top of the air pipe extends horizontally into the drying box and is connected with the inside of the drying box.

2. A constant temperature drying box according to claim 1, characterized in that: The sliding block is made of steel, and a first spring is arranged on a side of the sliding block close to the first chamber.

3. A constant temperature drying box according to claim 1, characterized in that: A positioning bead for positioning the slider is installed on the top of the second chamber, and a positioning groove matched with the positioning bead is opened on the top of the slider.

4. A constant temperature drying box according to claim 3, characterized in that: A box cover is connected to one side of the positioning bead close to the outer wall of the drying box, and the box cover is threadedly connected to the side wall of the drying box.

5. A constant temperature drying box according to claim 1, characterized in that: A support is fixedly installed at the inner bottom end of the drying box, and a plurality of grooves for placing explosive cans are formed on the support.

6. A constant temperature drying box according to claim 1, characterized in that: The desiccant is wrapped by non-woven fabric and fixedly connected to a side of the slider close to the first chamber.

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