Negative-pressure material drying auxiliary device

Abstract

The utility model provides a negative-pressure material drying auxiliary device which comprises a vacuum drying box, a vacuum pump and a vacuum pump. One end of the first air inlet pipe is communicated with the emptying port, and a first valve is arranged on a pipe body, close to the emptying port, of the first air inlet pipe; an air inlet and an air outlet are formed in the two opposite side walls of the water removal tank in the length direction of the water removal tank correspondingly, and the air outlet communicates with the other end of the first air inlet pipe; an air outlet of the air filter is communicated with the air inlet through a second air inlet pipe. Ventilation convection drying of materials in the vacuum drying box is achieved, evaporation of moisture in the materials is accelerated, the drying time of the materials is shortened, the drying efficiency of the materials is improved, the heating time of the materials is shortened due to shortening of the drying time of the materials, heat-sensitive components in the materials are not damaged, and the drying quality of the materials is ensured.

Description

Technical Field

[0001] The present application relates to the technical field of material drying, and in particular to a negative pressure material drying auxiliary device. Background Art

[0002] Negative pressure drying is a method of drying items using vacuum negative pressure technology. This technology creates a low-pressure environment inside the drying equipment, forcing the moisture in the items to evaporate and discharge quickly, thereby achieving a rapid drying effect.

[0003] However, under negative pressure, the moisture inside the material vaporizes at a lower temperature, but the moisture on the surface of the material has a diffusion rate lower than the surface vaporization rate, which causes the drying rate to gradually decrease and enter the deceleration stage. Therefore, negative pressure drying may result in the inability to effectively discharge the moisture inside the material, thereby prolonging the drying time of the material. Taking the negative pressure drying of medicines as an example, if the drying time of medicines is prolonged, the medicines will be heated for too long, which may damage the heat-sensitive components in the medicines. Utility Model Content

[0004] The present application provides a negative pressure material baking auxiliary device to solve the technical problems described in the above background technology.

[0005] In order to solve the above technical problems, this application adopts the following technical solutions:

[0006] The present application provides a negative pressure drying auxiliary device, comprising:

[0007] A vacuum drying oven, wherein a vacuum port and an exhaust port are disposed opposite to each other on the vacuum drying oven;

[0008] A first air inlet pipe, one end of which is connected to the exhaust port, and a first valve is provided on the pipe body of the first air inlet pipe close to the exhaust port;

[0009] A dewatering box, wherein the dewatering box has an air inlet and an air outlet respectively formed on two opposite side walls along the length direction thereof, and the air outlet is connected to the other end of the first air inlet pipe;

[0010] An air filter, wherein an air outlet of the air filter is connected to the air inlet through a second air inlet pipe.

[0011] Optionally, a gas dispersion head is provided in the vacuum drying box near the exhaust port, and one end of the first air inlet pipe is connected to the gas dispersion head.

[0012] Optionally, the gas dispersion head is rectangular, and a plurality of gas dispersion holes are evenly provided on the side wall thereof opposite to the exhaust port;

[0013] The thickness of the gas dispersion head is 0.8 cm to 1.2 cm.

[0014] Optionally, a first flange is provided on the exhaust port, and a second flange is provided on the tube body of the first air inlet pipe near one end thereof, the second flange matches the first flange and the two are connected together by a sealing fastener.

[0015] Optionally, a plurality of first partition plates are arranged at equal intervals in the dewatering box along its length direction, the top of the first partition plate is arranged on the inner top surface of the dewatering box and the bottom thereof is at a first preset distance from the inner bottom surface of the dewatering box, a second partition plate is arranged between every two adjacent first partition plates, the bottom of the second partition plate is connected to the inner bottom surface of the dewatering box and the top thereof is at a second preset distance from the inner top surface of the dewatering box, and a water absorbing layer is horizontally arranged between the first partition plate and the second partition plate;

[0016] Wherein, the widths of the first partition plate and the second partition plate both match the inner width of the water removal box.

[0017] Optionally, a box door is provided on the water removal box.

[0018] Optionally, a third air inlet pipe is connected to the first air inlet pipe on the pipe body between the first valve and the dewatering tank, and an end of the third air inlet pipe away from the first air inlet pipe is connected to an inert gas storage tank;

[0019] The first air inlet pipe is provided with a second valve on the pipe body between the third air inlet pipe and the water removal tank, and the third air inlet pipe is provided with a third valve.

[0020] The negative pressure drying auxiliary device provided in the present application sequentially introduces air into the vacuum drying oven through an air filter, a second air inlet pipe, a water removal box and a first air inlet pipe. During the vacuum drying process, the moisture inside the material diffuses to the surface of the material in the form of vapor or liquid, and the dry air after filtration and water removal enters the vacuum drying oven and contacts with the water vapor on the surface of the material during diffusion in the vacuum drying oven and brings it out of the vacuum drying oven from the vacuum port, thereby realizing ventilation convection drying of the material in the vacuum drying oven, thereby accelerating the evaporation of moisture inside the material, shortening the drying time of the material, and improving the drying efficiency of the material. The shortened drying time of the material reduces the heating time of the material, so that the heat-sensitive components in the material are not destroyed, thereby ensuring the drying quality of the material. In addition, during the process of vacuum drying the material in the vacuum drying oven, air enters the air filter through the air inlet of the air filter, and the air filtered by the air filter enters the dehydration tank through the second air inlet pipe. The filtered air is dehydrated by the dehydration tank, thereby reducing the impurities and moisture content in the air entering the vacuum drying oven through the first air inlet pipe, thereby achieving the improvement of the negative pressure drying efficiency of the material while ensuring the purity of the material after negative pressure drying. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 A schematic diagram of the structure of a negative pressure material drying auxiliary device provided in one embodiment of the present application;

[0023] Figure 2 A schematic diagram of a structure in which a gas dispersion head is provided in a vacuum drying oven provided in an embodiment of the present application;

[0024] Figure 3 A schematic diagram of the structure of a gas dispersion head and a gas dispersion hole provided on the gas dispersion head according to an embodiment of the present application;

[0025] Figure 4 A schematic diagram of the internal structure of a water removal tank provided in one embodiment of the present application.

[0026] In the figure: 100, vacuum drying box; 101, vacuum port; 102, exhaust port; 1021, first flange; 200, first air inlet pipe; 201, first valve; 202, second flange; 203, second valve; 300, dewatering box; 301, air inlet; 302, air outlet; 303, first partition plate; 304, second partition plate; 305, box door; 400, air filter; 500, second air inlet pipe; 600, gas dispersion head; 601, gas dispersion hole; 700, water absorption layer; 800, third air inlet pipe; 801, inert gas storage tank; 802, third valve. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application is clearly and completely described below. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work also fall within the scope of protection of the present application.

[0028] refer to Figures 1 to 4 The present application provides a negative pressure drying auxiliary device, comprising:

[0029] The vacuum drying oven 100 has a vacuum port 101 and an exhaust port 102 arranged relatively thereon; wherein the vacuum drying oven 100 is used for negative pressure drying of materials, and its specifications and models can be set according to actual needs, therefore, the present application does not make any specific limitation thereto.

[0030] A first air inlet pipe 200, one end of which is connected to the exhaust port 102, and a first valve 201 is provided on the pipe body close to the exhaust port 102; wherein the first valve 201 may be a flow regulating valve, and the first valve 201 is used to control the on-off and flow rate of air entering the vacuum drying box 100 through the first air inlet pipe 200 and the exhaust port 102.

[0031] The dewatering box 300 has an air inlet 301 and an air outlet 302 respectively provided on two opposite side walls along the length direction thereof, and the air outlet 302 is connected to the other end of the first air inlet pipe 200; wherein, the moisture in the air entering the dewatering box 300 is removed by the dewatering box 300, thereby reducing the moisture in the air entering the vacuum drying box 100 and ensuring the dryness of the material in the vacuum drying box 100.

[0032] The air filter 400, the air outlet of the air filter 400 is connected to the air inlet 301 through the second air inlet pipe 500. The air enters the air filter 400 through the air inlet of the air filter 400, and the air entering therein is filtered by the air filter 400, thereby removing impurities in the air entering the vacuum drying box 100, thereby ensuring the purity of the material in the vacuum drying box 100. The specifications and models of the air filter 400 can be set according to actual needs, so this application does not specifically limit it here. In addition, the relative arrangement of the vacuum port 101 and the emptying port 102 accelerates the convection rate of the air entering the vacuum drying box 100, thereby improving the vacuum drying efficiency of the material.

[0033] The negative pressure drying auxiliary device provided in the present application sequentially introduces air into the vacuum drying box 100 through the air filter 400, the second air inlet pipe 500, the water removal box 300 and the first air inlet pipe 200. During the vacuum drying process, the moisture inside the material diffuses to the surface of the material in the form of vapor or liquid. The dry air after filtration and water removal enters the vacuum drying box 100 and contacts with the water vapor on the surface of the material during diffusion in the vacuum drying box 100 and brings it out of the vacuum drying box 100 from the vacuum port 101. In this way, ventilation convection drying of the material in the vacuum drying box 100 is achieved, thereby accelerating the evaporation of moisture inside the material, shortening the drying time of the material, and improving the drying efficiency of the material. The shortening of the drying time of the material reduces the heating time of the material, so that the heat-sensitive components in the material are not destroyed, thereby ensuring the drying quality of the material. In addition, during the process of vacuum drying the material in the vacuum drying oven 100, air enters the air filter 400 through the air inlet of the air filter 400, and the air filtered by the air filter 400 enters the dewatering box 300 through the second air inlet pipe 500. The filtered air is dehydrated by the dewatering box 300, thereby reducing the impurities and moisture content in the air entering the vacuum drying oven 100 through the first air inlet pipe 200, thereby achieving the improvement of the negative pressure drying efficiency of the material while ensuring the purity of the material after negative pressure drying.

[0034] In some embodiments, reference Figure 2 In the vacuum drying box 100 of the present application, a gas dispersion head 600 is arranged near the exhaust port 102, and one end of the first air inlet pipe 200 is connected to the gas dispersion head 600. The gas dispersion head 600 is used to disperse the air entering therein, so that the filtered and dehydrated air can be evenly dispersed in the vacuum drying box 100 through the gas dispersion head 600, thereby increasing the contact points between the air and the materials, moisture, etc. in the vacuum drying box 100, and accelerating the vacuum drying efficiency of the materials.

[0035] In some embodiments, reference Figure 2 and Figure 3 The gas dispersion head 600 in the present application is rectangular, and a plurality of gas dispersion holes 601 are evenly provided on the side wall thereof opposite to the exhaust port 102; since the vacuum drying box 100 is usually square, the rectangular gas dispersion head 600 can better match the interior of the vacuum drying box 100, and the plurality of gas dispersion holes 601 are evenly distributed on the gas dispersion head 600, so that the air entering the gas dispersion head 600 can be evenly dispersed in the vacuum drying box 100 through the plurality of gas dispersion holes 601, thereby improving the efficiency of vacuum drying of the material.

[0036] In addition, the thickness of the gas dispersion head 600 is 0.8 cm to 1.2 cm, which ensures that there is enough space in the gas dispersion head 600 for air to be filled, so that the air filtered by the air filter 400 and the air dehydrated by the dehydration box 300 can continuously and stably enter the vacuum drying box 100 through the gas dispersion head 600. The specific value of the thickness of the gas dispersion head 600 can be set according to actual needs, so this application does not specifically limit it.

[0037] In some embodiments, reference Figure 1 In the present application, a first flange 1021 is provided on the emptying port 102, and a second flange 202 is provided on the pipe body of the first air inlet pipe 200 near one end thereof, and the second flange 202 matches the first flange 1021 and the two are connected together by a sealing fastener. The sealing fastener may include a fastening bolt, a nut, a sealing ring, etc., and threaded through holes matching the fastening bolts are evenly spaced on the first flange 1021 and the second flange 202. The first flange 1021 can be arranged on the outer wall of the vacuum drying box 100 around the emptying port 102 by welding, and the second flange 202 can also be connected to the outer peripheral wall of the first air inlet pipe 200 by welding. The specific method can be set according to actual needs, and the present application does not specifically limit it here.

[0038] In the above embodiment, the screw end of the fastening bolt is passed through the threaded through hole on the first flange 1021 and the threaded through hole on the second flange 202 in sequence, and the nut is screwed on the screw, and the sealing ring is arranged between the first flange 1021 and the second flange 202, so as to achieve the sealing and detachable connection between the exhaust port 102 and the first air intake pipe 200, thereby improving the sealing performance of the first air intake pipe 200 and the exhaust port 102 as well as the installation and disassembly efficiency.

[0039] In some embodiments, reference Figure 4In the dewatering box 300 of the present application, a plurality of first partition plates 303 are arranged at equal intervals along its length direction, the top of the first partition plate 303 is arranged on the inner top surface of the dewatering box 300 and the bottom thereof is at a first preset distance from the inner bottom surface of the dewatering box 300, a second partition plate 304 is arranged between each two adjacent first partition plates 303, the bottom of the second partition plate 304 is connected to the inner bottom surface of the dewatering box 300 and the top thereof is at a second preset distance from the inner top surface of the dewatering box 300, and a water-absorbing layer 700 is horizontally arranged between the first partition plate 303 and the second partition plate 304; wherein, the water-absorbing layer 700 can be made of sponge material, which can be specifically set according to actual needs, and the present application does not make any specific limitation on it.

[0040] Among them, the widths of the first partition plate 303 and the second partition plate 304 both match the internal width of the water removal tank 300, and the first preset distance and the second preset distance can be set according to actual needs, and this application does not make specific limitations on them.

[0041] In the above embodiment, the air filtered by the air filter 400 enters the dewatering box 300 through the second air inlet pipe 500 and the air inlet 301, and the arrangement of the multiple first partition plates 303 and the multiple second partition plates 304 in the dewatering box 300 allows the air to diffuse in the dewatering box 300 through an S-shaped path and enter the first air inlet pipe 200 through the air outlet 302, and the multiple water absorption layers 700 dewater the air in the dewatering box 300 in turn, thereby improving the efficiency of removing moisture from the air.

[0042] In some embodiments, reference Figure 1 The dewatering box 300 in the application is provided with a box door 305. The setting of the box door 305 facilitates the installation, disassembly and replacement of the water absorbing layer 700 in the dewatering box 300, thereby improving the installation efficiency of the water absorbing layer 700.

[0043] In some embodiments, reference Figure 1 The first air inlet pipe 200 in the present application is connected to a third air inlet pipe 800 on the pipe body between the first valve 201 and the dewatering tank 300, and the end of the third air inlet pipe 800 away from the first air inlet pipe 200 is connected to an inert gas storage tank 801; wherein, the inert gas storage tank 801 may store helium and the like. Since some materials have poor self-stability, and the air contains multiple components such as oxygen, carbon dioxide, and nitrogen, and the above components enter the vacuum drying box 100 with the air and affect the stability of the materials in the vacuum drying box 100, therefore, in order to increase the convection efficiency in the vacuum drying box 100 and improve the efficiency of vacuum drying of the materials, inert gas is introduced into the vacuum drying box 100 through the inert gas storage tank 801.

[0044] In addition, the first air inlet pipe 200 is provided with a second valve 203 on the pipe body between the third air inlet pipe 800 and the water removal tank 300, and the third air inlet pipe 800 is provided with a third valve 802. The second valve 203 and the third valve 802 may be flow regulating valves, and their specifications and models may be set according to actual needs, and therefore, this application does not specifically limit them.

[0045] In the above embodiment, when it is necessary to introduce inert gas into the vacuum drying oven 100, the second valve 203 is closed, the first valve 201 and the third valve 802 are opened, and the gas in the inert gas storage tank 801 enters the vacuum drying oven 100 through the third air inlet pipe 800 and the first air inlet pipe 200, thereby introducing inert gas into the vacuum drying oven 100. The inert gas accelerates the gas convection in the vacuum drying oven 100, thereby ensuring the stability of the material in the vacuum drying oven 100 and accelerating the vacuum drying efficiency of the material.

[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some or all of the technical features therein may be replaced by equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A negative pressure drying auxiliary device, characterized in that: include: A vacuum drying box (100), wherein a vacuum port (101) and an exhaust port (102) are disposed opposite to each other on the vacuum drying box (100); A first air inlet pipe (200), one end of the first air inlet pipe (200) being in communication with the exhaust port (102), and a first valve (201) being provided on a pipe body thereof close to the exhaust port (102); A dewatering box (300), wherein the dewatering box (300) is provided with an air inlet (301) and an air outlet (302) on two opposite side walls along the length direction thereof, respectively, and the air outlet (302) is communicated with the other end of the first air inlet pipe (200); An air filter (400), wherein an air outlet of the air filter (400) is connected to the air inlet (301) via a second air inlet pipe (500).

2. The negative pressure material drying auxiliary device according to claim 1, characterized in that: A gas dispersion head (600) is provided in the vacuum drying box (100) near the exhaust port (102), and one end of the first air inlet pipe (200) is connected to the gas dispersion head (600).

3. The negative pressure material drying auxiliary device according to claim 2, characterized in that: The gas dispersion head (600) is rectangular, and a plurality of gas dispersion holes (601) are evenly arranged on the side wall thereof opposite to the exhaust port (102); The thickness of the gas dispersion head (600) is 0.8 cm to 1.2 cm.

4. The negative pressure material drying auxiliary device according to claim 2, characterized in that: The exhaust port (102) is provided with a first flange (1021), and the first air inlet pipe (200) is provided with a second flange (202) on its pipe body near one end thereof; the second flange (202) matches the first flange (1021) and the two are connected together via a sealing fastener.

5. The negative pressure material drying auxiliary device according to claim 1, characterized in that: A plurality of first partition plates (303) are arranged at equal intervals in the dewatering box (300) along its length direction, the top of each of the first partition plates (303) is arranged on the inner top surface of the dewatering box (300) and the bottom thereof is at a first preset distance from the inner bottom surface of the dewatering box (300), a second partition plate (304) is arranged between each two adjacent first partition plates (303), the bottom of each of the second partition plates (304) is connected to the inner bottom surface of the dewatering box (300) and the top thereof is at a second preset distance from the inner top surface of the dewatering box (300), and a water absorbing layer (700) is horizontally arranged between the first partition plate (303) and the second partition plate (304); Wherein, the widths of the first partition plate (303) and the second partition plate (304) are both matched with the inner width of the water removal tank (300).

6. The negative pressure material drying auxiliary device according to claim 5, characterized in that: The dewatering tank (300) is provided with a tank door (305).

7. The negative pressure material drying auxiliary device according to any one of claims 1 to 6, characterized in that: The first air inlet pipe (200) is connected to a third air inlet pipe (800) on the pipe body between the first valve (201) and the dewatering tank (300), and one end of the third air inlet pipe (800) away from the first air inlet pipe (200) is connected to an inert gas storage tank (801); The first air inlet pipe (200) is provided with a second valve (203) on the pipe body between the third air inlet pipe (800) and the water removal tank (300), and the third air inlet pipe (800) is provided with a third valve (802).

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