Gas drying device

Abstract

The utility model discloses and provides a gas drying device. The gas drying device comprises a shell, an outer pipe and an inner pipe, the shell is provided with a first air inlet, a first air outlet and a water outlet; the outer pipe is arranged in the shell, a first air duct is formed between the outer pipe and the shell, the outer pipe is provided with a second air inlet communicated with the first air duct, and the first air duct is communicated with the first air inlet and the water outlet; the inner pipe is arranged in the outer pipe, a second air channel is formed between the inner pipe and the outer pipe, and the inner pipe is provided with a second vent hole communicated with the second air channel and a third air outlet communicated with the first air outlet. Through the arrangement of the first flow limiting piece and the second flow limiting piece, on the basis that multiple times of compression and drainage of gas are achieved, installation of the outer pipe and the inner pipe is facilitated, the installation technology is simplified, and the installation difficulty is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of gas source drying equipment, in particular to a gas drying device. Background Art

[0002] A gas dryer is a device used to remove moisture or other humidity components from gas. In many industrial and laboratory applications, it is necessary to handle dry gas because moisture may have a negative impact on equipment and processes. A gas dryer removes moisture or humidity components from gas through adsorption, condensation, membrane separation, chemical reaction, etc. to obtain dry gas.

[0003] The temperature of compressed air just coming out of the air compressor can reach between 140 and 170 degrees. At this time, the water in the air is in a gaseous state. It is impossible to fully and quickly separate the water and gas. Only when the temperature drops to a certain temperature can the water in the air completely turn into a liquid state. Even the cold dryer cannot maintain this temperature for a long time. There will also be a large amount of water transported to the gas application end in the form of gas. As the transportation distance increases, the temperature of the air gradually decreases. During the pipeline transportation process, the alternation of hot and cold will produce a large amount of cold water. This is why there is still a large amount of cold water even after the cold dryer is installed.

[0004] In addition, the overall structure is relatively complex and not easy to install.

[0005] There is an urgent need for a device that dries the gas source at the end (gas-using end) to solve this problem. Utility Model Content

[0006] The technical problem to be solved by the utility model is to provide a gas drying device to solve the problem that the overall structure is complex and difficult to install, in view of the above-mentioned defects of the prior art.

[0007] The utility model solves the technical problem by adopting a technical solution: providing a gas drying device, comprising: a shell, an outer tube, an inner tube, a first flow limiting plate and a second flow limiting plate;

[0008] The housing is provided with a first air inlet, a first air outlet and a drain outlet;

[0009] The outer tube is arranged in the shell body and a first air duct is formed therebetween, and a second air inlet communicating with the first air duct is provided, and the first air duct is communicated with the first air inlet and the drain port;

[0010] The inner tube is arranged inside the outer tube to form a second air duct therebetween, and is provided with a second vent hole communicating with the second air duct, and a third air outlet communicating with the first air outlet;

[0011] The first flow limiting plate is provided with a first vent hole, the second flow limiting plate is provided with a first through hole and a third vent hole, the first flow limiting plate is arranged at the second air inlet of the outer tube, the first through hole of the second flow limiting plate is sleeved to the outside of the inner tube, the first flow limiting plate and the second flow limiting plate are both against the inner side of the outer tube, and are set in a limiting position.

[0012] Among them, the preferred solution is: the gas drying device also includes a first limit junction, a second limit structure and a limit spring, the limit spring is arranged between the first limit junction and the second limit structure, and the first current limiting plate is arranged between the limit spring and the first limit junction, and the second current limiting plate is arranged between the limit spring and the second limit junction.

[0013] Among them, the preferred solution is: the first limiting structure is a first pin arranged on the inner side of the protruding outer tube, and the first current limiting plate is limited to the left side of the first pin; the second limiting structure is a second pin arranged on the outer side of the protruding inner tube, and the second current limiting plate is limited to the right side of the second pin.

[0014] Among them, a preferred solution is: the shell includes an end cover, a bottom cover and a tube body, the end cover and the bottom cover are respectively arranged at both ends of the tube body, a first air duct is formed between the tube body and the outer tube, the first air inlet and the first air outlet are arranged on the end cover, and the drain port is arranged on the tube body;

[0015] One end of the inner tube is arranged close to the end cover, the second flow limiting plate is arranged at the other end of the inner tube, and the second vent hole is arranged in the area between the end cover and the second flow limiting plate.

[0016] Among them, the preferred solution is: the third air outlet is arranged at one end of the inner tube, the other end of the inner tube is sealed, multiple second air holes are arranged on the side of the inner tube, the inner tube is provided with a joint at the third air outlet, and the other end of the joint passes through the outer tube to communicate with the fourth air outlet.

[0017] Among them, the preferred solution is: the joint includes a first channel section and a second channel section, the cross-sectional area of ​​the first channel section is smaller than the cross-sectional area of ​​the second channel section, the end of the outer tube close to the end cover is fixedly connected to a cover plate, the cover plate is provided with a second through-hole, the first channel section of the joint passes through the second through-hole and is inserted into the fourth air outlet; the second channel section abuts against the cover plate.

[0018] Among them, a preferred solution is: the inner tube is inserted into the second channel section; and the insertion edge of the end cover is arranged between the outer tube and the tube body.

[0019] Among them, a preferred solution is: at least one first current limiting plate is provided, and a plurality of first vents are arranged on the first current limiting plate, and the plurality of first vents are arranged around the central area of ​​the first current limiting plate and close to the edge.

[0020] Among them, a preferred solution is: at least one second flow limiting plate is provided, and a plurality of third vents are arranged on the second flow limiting plate, and the plurality of third vents are arranged around the first through opening of the second flow limiting plate close to the edge.

[0021] Among them, a preferred solution is that the end cover and the bottom cover are detachably connected to the two ends of the tube body respectively.

[0022] The beneficial effect of the utility model is that, compared with the prior art, the utility model realizes multiple compression and drainage of gas through the arrangement of the first flow limiting plate and the second flow limiting plate, and also facilitates the installation of the outer pipe and the inner pipe, simplifies the installation process, and reduces the difficulty of installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0024] Figure 1 It is a cross-sectional view of the structure of the air source dryer according to an embodiment of the present disclosure;

[0025] Figure 2 This is a schematic diagram of the end cover structure of an embodiment of the present disclosure;

[0026] Figure 3 This is a schematic diagram of the inner tube structure of an embodiment of the present disclosure;

[0027] Figure 4 This is a schematic diagram of the structure of a first current limiting sheet according to an embodiment of the present disclosure;

[0028] Figure 5 is a schematic diagram of the structure of a second current limiting sheet according to an embodiment of the present disclosure;

[0029] Figure 6 A schematic diagram of a compressed gas flow path according to an embodiment of the present disclosure;

[0030] Figure 7 This is a schematic diagram of the end cover structure of an embodiment of the present disclosure;

[0031] Figure 8 A cross-sectional view of the structure of the air source dryer close to the end cover of an embodiment of the present disclosure;

[0032] Fig. 9 It is a cross-sectional view of the structure of the air source dryer close to the end cover and omitting the inner tube of the embodiment of the present disclosure;

[0033] Fig.10It is a partially enlarged structural cross-sectional view of the second current limiting sheet and the second position limiting structure of the embodiment of the present disclosure;

[0034] Fig.11 It is a partially enlarged structural cross-sectional view of the first current limiting sheet and the first position limiting structure of the embodiment of the present disclosure;

[0035] Fig.12 It is a partially enlarged structural cross-sectional view of the first current limiting piece, the limiting spring and the second current limiting piece in the embodiment of the present disclosure;

[0036] Fig.13 It is a partial enlarged cross-sectional view of the joint according to the embodiment of the present disclosure. DETAILED DESCRIPTION

[0037] Now, in conjunction with the accompanying drawings, a preferred embodiment of the present utility model is described in detail.

[0038] like Figures 1 to 9 As shown, the utility model provides a preferred embodiment of a gas drying device.

[0039] A gas drying device comprises: a shell 100, an outer tube 200 and an inner tube 300; the shell 100 is provided with a first air inlet 111 and a first air outlet 112 arranged near the first end, and a drain outlet 131 arranged near the second end; the outer tube 200 is arranged in the shell 100 and a first air duct 101 is formed therebetween, the second air inlet 210 of the outer tube 200 is arranged near the second end of the shell 100, and a first flow limiting plate 400 having a first air vent 410 is arranged at the second air inlet 210; the inner tube 300 is arranged in the outer tube 200 and a second air duct 102 is formed therebetween, the side of the inner tube 300 is provided with a second air vent 310 and is connected to the second air duct 102, and the third air outlet 320 of the inner tube 300 is connected to the first air outlet 112.

[0040] In addition, the first flow limiting plate 400 is provided with a first vent hole 410, and the second flow limiting plate 500 is provided with a first through hole 520 and a third vent hole 510. The first flow limiting plate 400 is arranged at the second air inlet 210 of the outer tube 200, and the first through hole 520 of the second flow limiting plate 500 is sleeved to the outer side of the inner tube 300. The first flow limiting plate 400 and the second flow limiting plate 500 are both against the inner side of the outer tube 200 and are set in a limiting position.

[0041] Among them, the specific installation method is as follows: the outer tube 200 is installed in the shell 100, and this step can be installed first or later; and the inner tube 300 is installed in the outer tube 200, one end of the inner tube 300 is arranged close to the outer tube 200, and the other end is sleeved with a second flow limiting plate 500, and the inner tube 300 is positioned and installed to ensure that the inner tube 300 is relatively parallel to the outer tube 200; and after the second flow limiting plate 500 is installed, the first flow limiting plate 400 is installed at the end of the outer tube 200. Through the arrangement of the first flow limiting plate 400 and the second flow limiting plate 500, multiple compression and drainage of gas is achieved, and the installation of the outer tube 200 and the inner tube 300 is also facilitated, the installation process is simplified, and the installation difficulty is reduced.

[0042] The airflow flows as follows: the external air enters the first air duct 101 through the first air inlet 111, flows along the first air duct 101 and enters the second air duct 102 from the second air inlet 210, then flows along the second air duct 102 and enters the inner tube 300 from the second vent hole 310, and finally flows into the first air outlet 112 through the third air outlet 320 and is discharged to the outside. In the normal use state, the housing 100 is placed vertically, that is, the first end of the housing 100 is placed upward, and the second end of the housing 100 is placed downward.

[0043] In the first air duct 101, the gas entering the first air duct 101 from the first air inlet 111, under the action of centrifugal force, spirals downward in the first air duct 101 and discharges moisture in the gas, and the discharged moisture is discharged through the drain port 131, thereby achieving the first drying of the gas; at the second air inlet 210, due to the action of the first limiting plate 400 and the second limiting plate 500, the gas is compressed, and the gas entering the second air duct 102 from the first air duct 101 through the first limiting plate 400 is compressed, on the one hand, the gas flow rate is increased, and on the other hand, the gas is compressed for the second time to discharge moisture in the gas; then, the airflow continues to flow along the second air duct 102, and enters the inner tube 300 through the second air vent 310, and through the action of the second air vent 310, the gas is compressed again to discharge moisture in the gas and increase the gas flow rate, and finally flows out from the first air outlet 112 through the third air outlet 320 in the inner tube 300. Centrifugal force and multiple compression processes are used to effectively remove moisture from the gas, improve the drying effect, and ultimately allow the dry gas to flow out of the device smoothly.

[0044] In the process from the first air duct 101 to the second air duct 102, the gas is bent 180 degrees, and in the process from the second air duct 102 to the inner tube 300, the gas is bent 90 degrees, which avoids the generation of the siphon effect, further removes moisture in the air, and flows into the drain port 131 at the bottom of the housing 100 along the second air duct 102. In the actual process, not only the moisture in the gas is discharged, but also the oil and impurities in the gas can be discharged, so that the gas containing moisture, oil and impurities enters from the first air inlet 111, passes through the gas drying device, and discharges dry and clean gas from the first air outlet 112, and the turbulence and compression process separate and remove substances of different components.

[0045] The essence of compression is to cool the gas. The cooling principle is Bernoulli's principle. When the gas passes through a small hole from a large volume area, the flow rate will increase, causing pressure changes and low temperature. After passing a certain distance in the closed space, the gas pressure will become almost constant, achieving multiple cooling effects (through the first air vent 410 of the first current limiting plate 400 and the second air vent 310 of the inner tube 300).

[0046] In this embodiment, reference Figures 10 to 12 The gas drying device also includes a first limiting knot 710, a second limiting structure 720 and a limiting spring 730, the limiting spring 730 is arranged between the first limiting knot 710 and the second limiting structure 720, and the first current limiting plate 400 is arranged between the limiting spring 730 and the first limiting knot 710, and the second current limiting plate 500 is arranged between the limiting spring 730 and the second limiting knot 720.

[0047] Specifically, the first limiting knot 710 and the second limiting structure 720 are provided to respectively axially position the first current limiting plate 400 and the second current limiting plate 500 in the outer tube 200, so that the first current limiting plate 400 and the second current limiting plate 500 can be placed and positioned. The first limiting knot 710 and the second limiting structure 720 extend into the outer tube 200, and since the outer contours of the first current limiting plate 400 and the second current limiting plate 500 just fit the inner contour of the cross section of the outer tube 200 when placed vertically, a sealing setting is achieved, and the gas can only flow from the first vent 410 and the third vent 510. Of course, this sealing is relative sealing, and the degree of sealing is related to the material or process.

[0048] The limiting spring 730 realizes the axial positioning stability of the first limiting knot 710 and the second limiting structure 720 , and respectively presses the first limiting knot 710 and the second limiting structure 720 to the corresponding first limiting knot 710 and the second limiting structure 720 .

[0049] Specific installation method: first set up the second limiting structure 720, install the second current limiting plate 500 in place, and fit it to one side of the second limiting structure 720 (the side close to the second current limiting plate 500), then place and install the limiting spring 730, and keep the limiting spring 730 in a compressed state, then install the first current limiting plate 400, and then install the first limiting knot 710, so that the first current limiting plate 400 fits to one side of the first limiting knot 710 (the side close to the first current limiting plate 400), thereby achieving overall fast and convenient installation, without the need for positioning by fixing methods such as welding.

[0050] In this embodiment, the first limiting structure 710 is a first pin disposed on the inner side of the protruding outer tube 200, and the first current limiting plate 400 is limited and abutted against the left side of the first pin; the second limiting structure 720 is a second pin disposed on the outer side of the protruding inner tube 300, and the second current limiting plate 500 is limited and abutted against the right side of the second pin.

[0051] Specifically, the second pin is fixedly set on the inner tube 300 and is set outward from the inner tube 300 to extend into the second air duct 102. During the actual installation process, since the installation position of the second pin is far away from the opening of the outer tube 200, the second pin is first fixedly set with the inner tube 300, and then the inner tube 300 is installed in the outer tube 200; wherein, it is preferred that a plurality of pins are arranged around the inner tube 300 (on the same cross-section), which abut against the second limiting structure 720 in all directions, so as to provide more stable axial positioning for the second limiting structure 720.

[0052] The first pin is fixedly arranged in the outer tube 200 and is arranged inward from the outer tube 200. The first pin is installed after the installation of the first limiting plate 400 is completed, so as to realize the sequential installation and fixation of the second limiting structure 720, the second limiting plate 500, the limiting spring 730, the first limiting plate 400 and the first limiting knot 710; preferably, multiple ones are arranged around the outer tube 200 (on the same cross section), which abut against the first limiting structure 710 in all directions, so as to provide more stable axial positioning for the first limiting knot 710.

[0053] In this embodiment, the shell 100 includes an end cover 110, a bottom cover 130 and a tube body 120, the end cover 110 and the bottom cover 130 are respectively arranged at both ends of the tube body 120, a first air duct 101 is formed between the tube body 120 and the outer tube 200, the first air inlet 111 and the first air outlet 112 are arranged on the end cover 110, and the drain port 131 is arranged on the tube body 120.

[0054] Specifically, the tube body 120 is a hollow tube body, and the end covers 110 and the bottom cover 130 are respectively arranged at the two ends of the hollow tube body. The outer tube 200 is arranged in the hollow interior of the tube body 120. The outer tube 200 is also a hollow tube body, and the outer tube 200 is open at one end and sealed at the other end. The sealed end of the outer tube 200 is arranged close to the end cover 110, and the open end is arranged close to the bottom cover 130. Therefore, the airflow in the first air duct 101 can only enter the second air duct 102 from the area close to the bottom cover 130; and the inner tube 300 is also preferably arranged close to the end cover 110, so that the third air outlet of the inner tube 300 is connected to the first air outlet of the end cover 110.

[0055] Furthermore, the second vent holes 310 of the inner tube 300 are preferably arranged near the end cover 110 to provide a sufficient gas flow distance so that the gas pressure is gradually constant. The third gas outlet 320 is arranged at one end of the inner tube 300, and the other end of the inner tube 300 is sealed. A plurality of the second vent holes 310 are arranged on the side of the inner tube 300. The plurality of second vent holes 310 are arranged along the length direction of the inner tube 300 and form a vertical group. A plurality of vertical groups are formed on the side of the inner tube 300, so that the gas can enter the inner tube 300 from all directions in the second air duct 102.

[0056] In this embodiment, the end cover 110 and the bottom cover 130 are respectively detachably connected to the two ends of the tube body 120. The tube body 120 is a circular tubular structure with openings at both ends and a hollow interior. The tube body 120 is made of metal material. The end cover 110 and the bottom cover 130 are respectively detachably connected to the two ends of the tube body 120 and can be fixed by interference fit or threaded connection.

[0057] The end cover 110 includes an inner cavity 113, the first air inlet 111 and the first air outlet 112 are respectively arranged on the side of the end cover 110 and communicated with the inner cavity 113, the end cover 110 also includes an air outlet channel 114, one end of the air outlet channel 114 includes a fourth air outlet 115 arranged at the center of the end cover 110, the other end of the air outlet channel 114 is communicated with the first air outlet 112, the inner cavity 113 is communicated with the first air duct 101, and the fourth air outlet 115 is communicated with the third air outlet 320. Furthermore, the high-temperature compressed air enters the tube body 120 through the first air inlet 111 and spirally falls along the first air duct 101 to generate centrifugal force. Under the action of the centrifugal force, the water in the air enters the drain port 131 and is discharged. After the air is dried by the drying mechanism, it is discharged from the first air outlet 112 to supply the gas-using equipment for use.

[0058] Furthermore, since the first air outlet 112 is arranged on the side of the end cover 110, the gas enters the inner cavity 113 horizontally from the first air outlet 112. Since the cavity formed by the inner cavity 113 and the first air duct 101 is a hollow annular cavity, the gas rotates and flows in the hollow annular cavity. Since the gas continuously enters and is squeezed downward, and under the influence of gravity, the gas spirally flows downward in the hollow annular cavity.

[0059] In this embodiment, the inner tube 300 is provided with a joint 600 at the third air outlet 320, and the other end of the joint 600 passes through the outer tube 200 and communicates with the fourth air outlet 115. The end of the outer tube 200 close to the end cover 110 is fixedly connected with a cover plate 220, and the cover plate 220 is provided with a second through hole 221, and one end of the joint 600 passes through the through hole of the cover plate 220 and is inserted into the fourth air outlet 115. A cover plate 220 is welded and fixed to one end of the outer tube 200 close to the end cover 110, and a joint 600 is detachably connected to one end of the inner tube 300. The joint 600 and the inner tube 300 are fixed by threaded connection or interference fit. The joint 600 passes through the second through hole 221 of the cover plate 220 and is inserted into the fourth air outlet 115, so that the joint 600 is connected with the air outlet channel 114; further, the inner side of the end cover 110 is provided with an internal thread, and the outer side of the joint 600 is provided with an external thread. The end cover 110 and the joint 600 are fixed by threaded connection, and the inner tube 300 is connected with the first air outlet 112. The outer tube 200 is a circular tubular structure with openings at both ends and a hollow interior. The bottom end of the inner tube 300 is sealed to prevent compressed air from entering from the bottom end of the inner tube 300. After the compressed air enters the inner tube 300 through the first air inlet 111, it moves downward in a spiral along the inner wall of the inner tube 300, enters from the bottom of the outer tube 200 after moving to the bottom, enters from the second air vent 310 after a 90-degree bend, and finally is discharged from the first air outlet 112. When the compressed air passes through the second air vent 310 at high speed, according to the Bernoulli principle, its flow rate will increase significantly, and the increase in flow rate will lead to a decrease in pressure. This process is accompanied by the conversion of the internal energy of the air into kinetic energy, and the internal energy is reduced, which will cause the temperature to drop. In addition, when the air passes through the small hole quickly, it may rub against the hole wall, etc., and the friction will also produce a certain amount of heat loss, which will lead to a decrease in temperature. In addition, if the air itself is in a high-pressure state, the pressure drops sharply after passing through the small hole. This adiabatic expansion process will also cause the temperature to drop. After the temperature drops, the water vapor in the compressed air becomes condensed water and is discharged from the drain port 131, while the dried compressed air is discharged from the exhaust port. When the compressed air enters the inner tube 300 from the second air hole 310 of the inner tube 300, the compressed air is bent and discharged. The purpose is to utilize the turbulence principle to avoid the siphon effect and bring the water that is not discharged in time by the drainer into the first air outlet 112.

[0060] Among them, reference Fig.13 The joint 600 includes a first channel section 610 and a second channel section 620, the cross-sectional area of ​​the first channel section 610 is smaller than the cross-sectional area of ​​the second channel section 620, the end of the outer tube 200 close to the end cover 110 is fixedly connected to a cover plate 220, the cover plate 220 is provided with a second through-hole 221, the first channel section 610 of the joint 600 passes through the second through-hole 221 and is inserted into the fourth air outlet 15; the second channel section 620 abuts against the cover plate 220.

[0061] The end of the inner tube 300 is further inserted into the second channel section 620 to achieve a fixed arrangement.

[0062] In this embodiment, a second flow-limiting piece 500 is further disposed in the outer tube 200. The second flow-limiting piece 500 includes a first through-hole 520 and a third vent hole 510. The first through-hole 520 is disposed in the central region of the second flow-limiting piece 500. The inner tube 300 is disposed through the first through-hole 520, and the second flow-limiting piece 500 is conveniently abutted against the inner side of the outer tube 200. The function of the second flow-limiting piece 500 is consistent with that of the first flow-limiting piece 400, and the gas is compressed through the third vent hole 510. On the other hand, the second flow-limiting piece 500 can also realize the positioning and fixing of the inner tube 300, ensure the stability of the inner tube 300 in the outer tube 200, and also serve as a fixed support structure.

[0063] The edges of the first limiting plate 400 and the second limiting plate 500 are matched with the inner wall gap of the outer tube 200 to prevent air from passing through the gap between the partition and the outer tube 200. After the compressed air enters from the first air inlet 111, it passes through the first air vent 410 of the first limiting plate 400 and the third air vent 510 of the second limiting plate 500. At this time, the temperature of the compressed air is reduced (the principle has been explained in detail above and will not be repeated here). After multi-stage cooling, it enters the inner tube 300 from the second air vent 310 of the inner tube 300 and is discharged from the first air outlet 112. After multiple cooling, the water vapor in the compressed air is condensed and discharged, thereby improving the drying effect.

[0064] There is at least one first current limiting piece 400, and a plurality of first vents 410 are arranged on the first current limiting piece 400, and the plurality of first vents 410 are arranged around the central area of ​​the first current limiting piece 400 and close to the edge. There is at least one second current limiting piece 500, and a plurality of third vents 510 are arranged on the second current limiting piece 500, and the plurality of third vents 510 are arranged around the first through opening 520 of the second current limiting piece 500 and close to the edge.

[0065] Regarding the first flow limiting plate 400, a plurality of first vent holes 410 are arranged and evenly distributed around the central area of ​​the first flow limiting plate 400, and other first vent holes 410 are also arranged between the edge and a circle of multiple first vent holes 410. By evenly distributing the first vent holes 410 on the first flow limiting plate 400, the gas is more evenly distributed when passing through the flow limiting plate, ensuring the uniformity of contact of the gas on the entire surface of the flow limiting plate, and increasing the surface area of ​​contact between the gas and the flow limiting plate, thereby enhancing the drying effect and the condensation and discharge efficiency of water vapor. By arranging other first vent holes 410 between the edge and a circle of multiple first vent holes 410, the surface area of ​​contact between the gas and the flow limiting plate can be further increased, effectively improving the heat transfer and mass transfer efficiency in the gas treatment process, which is beneficial to the condensation and discharge of water vapor, thereby improving the drying effect of the gas.

[0066] Similarly, regarding the second current limiting plate 500 , a plurality of third vent holes 510 are arranged and evenly distributed around the first through hole 520 of the second current limiting plate 500 , and other third vent holes 510 are further arranged between the edge and a circle of the plurality of third vent holes 510 .

[0067] In addition, the aperture sizes of the first vent hole 410, the second vent hole 310 and the third vent hole 510 are set to be between 0.8-2.2 mm, preferably 1 mm or 2 mm, mainly based on the difficulty of processing the first vent hole 410, the second vent hole 310 and the third vent hole 510. At the same time, if the aperture size is too small, it will affect the air flow and easily cause blockage, and if the aperture size is too large, it cannot block large water droplets and impurities. The number of holes will be set according to the exhaust volume.

[0068] The working principle of the utility model is as follows: compressed air enters from the first air inlet 111, moves downward at high speed along the inner spiral of the tube body 120, and uses the principle of centrifugal force to throw water in the air to the inner wall of the outer tube 200. Under the action of gravity, the compressed air is discharged downward through the drain port 131. When the compressed gas with most of the water vapor removed reaches the bottom, the air enters from the bottom end of the outer tube 200, is cooled by the first flow limiting plate 400, and continues to be cooled by the second flow limiting plate 500. After a 90-degree bend, it passes through the second vent 310 to enter the inner tube 300, and is finally discharged from the first air outlet 112. The compressed air passes through the microporous cooling structure three times, and the temperature is reduced to the corresponding pressure dew point. The water vapor in the compressed air is converted into condensed water, which is gathered at the drain port 131 and discharged through the automatic drain connected to the drain port 131 pipeline.

[0069] The above is only the best embodiment of the present invention and is not intended to limit the scope of the present invention. All equivalent changes or modifications made within the scope of the patent application of the present invention are covered by the present invention.

Claims

1. A gas drying device, characterized in that: include: A shell, an outer tube, an inner tube, a first flow limiting plate and a second flow limiting plate; The housing is provided with a first air inlet, a first air outlet and a drain outlet; The outer tube is arranged in the shell body and a first air duct is formed therebetween, and a second air inlet communicating with the first air duct is provided, and the first air duct is communicated with the first air inlet and the drain port; The inner tube is arranged inside the outer tube to form a second air duct therebetween, and is provided with a second vent hole communicating with the second air duct, and a third air outlet communicating with the first air outlet; The first flow limiting plate is provided with a first vent hole, the second flow limiting plate is provided with a first through hole and a third vent hole, the first flow limiting plate is arranged at the second air inlet of the outer tube, the first through hole of the second flow limiting plate is sleeved to the outside of the inner tube, the first flow limiting plate and the second flow limiting plate are both against the inner side of the outer tube, and are set in a limiting position.

2. The gas drying device according to claim 1, characterized in that: The gas drying device also includes a first limiting junction, a second limiting structure and a limiting spring, the limiting spring is arranged between the first limiting junction and the second limiting structure, the first current limiting plate is arranged between the limiting spring and the first limiting junction, and the second current limiting plate is arranged between the limiting spring and the second limiting junction.

3. The gas drying device according to claim 2, characterized in that: The first limiting structure is a first pin disposed on the inner side of the protruding outer tube, and the first current limiting plate is limited to the left side of the first pin; the second limiting structure is a second pin disposed on the outer side of the protruding inner tube, and the second current limiting plate is limited to the right side of the second pin.

4. The gas drying device according to claim 2 or 3, characterized in that: The shell comprises an end cover, a bottom cover and a tube body, wherein the end cover and the bottom cover are respectively arranged at two ends of the tube body, a first air duct is formed between the tube body and the outer tube, the first air inlet and the first air outlet are arranged on the end cover, and the drain port is arranged on the tube body; One end of the inner tube is arranged close to the end cover, the second flow limiting plate is arranged at the other end of the inner tube, and the second vent hole is arranged in the area between the end cover and the second flow limiting plate.

5. The gas drying device according to claim 4, characterized in that: The third air outlet is arranged at one end of the inner tube, the other end of the inner tube is sealed, a plurality of the second air vents are arranged on the side of the inner tube, the inner tube is provided with a joint at the third air outlet, the other end of the joint passes through the outer tube and is connected to the fourth air outlet.

6. The gas drying device according to claim 5, characterized in that: The joint includes a first channel section and a second channel section, the cross-sectional area of ​​the first channel section is smaller than the cross-sectional area of ​​the second channel section, one end of the outer tube close to the end cover is fixedly connected to a cover plate, the cover plate is provided with a second through-hole, the first channel section of the joint passes through the second through-hole and is inserted into the fourth air outlet; the second channel section abuts against the cover plate.

7. The gas drying device according to claim 6, characterized in that: The inner tube is inserted into the second channel section; the insertion edge of the end cover is arranged between the outer tube and the tube body.

8. The gas drying device according to any one of claims 1 to 3, characterized in that: At least one first current limiting plate is provided, and a plurality of first vent holes are arranged on the first current limiting plate. The plurality of first vent holes are arranged around the central area of ​​the first current limiting plate and close to the edge.

9. The gas drying device according to any one of claims 1 to 3, characterized in that: At least one second flow limiting plate is provided, and a plurality of third vent holes are arranged on the second flow limiting plate. The plurality of third vent holes are arranged around the first through opening of the second flow limiting plate and close to the edge.

10. The gas drying device according to claim 4, characterized in that: The end cover and the bottom cover are detachably connected to the two ends of the tube body.

Images