A drying device for gas cylinder production

Abstract

The present invention relates to the technical field related to gas cylinder drying, and discloses a drying device for gas cylinder production. In order to solve the problem of low utilization rate of high-temperature air, an outer expansion tube is wrapped around the outer side of a central gas rod. Under normal circumstances, the outer expansion tube is tightly attached to the outer side of the central gas rod, so that it can be inserted into the inner cavity from the mouth of the gas cylinder following the central gas rod. Afterwards, the high-temperature airflow is introduced into the outer expansion tube by an external air supply component. The outer expansion tube will expand outward due to the input of airflow, so that it expands inside the gas cylinder, so that the high-temperature airflow can only flow from the gap between the gas tank and the outer expansion tube. This method can make the high-temperature airflow flow out to its mouth along the inside of the gas tank, thereby avoiding the loss of high-temperature airflow, and finally achieving the effect of filling and drying the inside of the gas cylinder.

Description

Technical Field

[0001] The present invention relates to the technical field related to gas cylinder drying, and in particular to a drying device for gas cylinder production. Background Art

[0002] After the gas cylinder has completed the hydraulic test or gone through the cleaning process, there is often residual moisture on its inner and outer surfaces that is difficult to evaporate and dry naturally. In particular, if the moisture on the inner surface is not removed in a timely and effective manner, it will accelerate the rust process of the inner wall of the gas cylinder, not only corroding the metal material, but also gradually expanding to a wider area, thereby seriously affecting the overall performance of the gas cylinder, shortening its service life, and even threatening its safety. Therefore, the core goal of gas cylinder drying is to completely remove moisture and other potential impurities inside the gas cylinder to prevent hidden dangers such as corrosion and blockage, and fundamentally ensure the manufacturing quality of the gas cylinder and the safety of long-term operation.

[0003] Traditionally, the drying operation of gas cylinders usually relies on inserting a drying tube directly into the gas cylinder, and using the high-temperature airflow generated by an external heating source to blow into the gas cylinder through the drying tube to achieve the drying effect. However, in actual operation, this method faces significant limitations. Since the mouth of the gas cylinder is often much smaller than the size of the bottle body, it is difficult for the drying tube inserted into the mouth of the bottle to fully unfold and effectively fill the entire internal space of the gas cylinder. As a result, a large amount of high-temperature airflow escapes from the mouth of the bottle prematurely due to the pressure of the airflow before it fully contacts and dries the inner surface of the gas cylinder. This not only leads to low drying efficiency, but also causes a huge waste of precious heat energy. Summary of the invention

[0004] The present invention provides a drying device for gas cylinder production, which has the advantages of filling and drying the inside of the gas cylinder, and is used to solve the problem of low utilization rate of high-temperature air proposed in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a drying device for gas cylinder production, comprising: a mounting base, a central gas rod is mounted in the middle, an air inlet and an exhaust duct are opened in the central gas rod; a gas tank, inverted and inserted to the outside of the central gas rod; an outer expansion tube, wrapped around the outside of the central gas rod; the increase in air flow pressure inside the outer expansion tube causes the outer expansion tube to bulge outward, thereby filling the internal space of the gas tank and shortening the gap between the outer expansion tube and the gas tank, so that the air flow can only flow through the gap.

[0006] Furthermore, the diameter of the intake duct is 3-5 times the diameter of the exhaust duct.

[0007] Furthermore, a guide bar is arranged on the outside of the outer expansion tube, and the cross-section of the guide bar is an isosceles triangle.

[0008] Furthermore, a supporting top seat is fixedly installed on the top of the central gas rod, and an exhaust hole connected to the exhaust duct is opened in the supporting top seat. A covering sleeve located below the outer expansion tube is mounted on the outer side of the central gas rod, and the top end of the covering sleeve and the bottom end of the outer expansion tube are fixedly connected.

[0009] Furthermore, a comb strip center frame is arranged on the outside of the outer expansion cylinder, a reset push spring is arranged between the comb strip center frame and the covering sleeve, and a limit stop rod is fixedly installed on the bottom of the comb strip center frame.

[0010] Furthermore, a detection switch is fixedly mounted on the surface of the mounting base, and an indicator light connected in series with the detection switch is fixedly mounted on the mounting base. The indicator light is connected to the positive pole of the power supply through a protective resistor, and the negative pole of the power supply is connected to the detection switch.

[0011] Furthermore, a detection channel connected to the air inlet channel is opened on the outside of the central gas rod, a detection cavity connected to the detection channel is opened in the covering sleeve, a detection piston is movably installed in the detection cavity, and a piston push spring is connected between the detection piston and the covering sleeve, and an alarm whistle connected to the detection cavity is fixedly installed on the covering sleeve.

[0012] Furthermore, fan blades connected by bearings are arranged on the outer side of the comb center frame, a support plate is installed on the outer side of the fan blade, and a limit magnetic block is installed in the support plate.

[0013] Furthermore, a starting switch located on one side of the detection piston is fixedly installed on the covering sleeve, and a coil is fixedly installed on the inner side of the covering sleeve. The positive pole of the power supply is connected to the coil after passing through a protective resistor, and the coil is connected to the starting switch. The starting switch is connected to the normally closed position of the detection switch, and the starting switch is a delayed disconnect switch.

[0014] Furthermore, a damping hole and a one-way air valve communicating with the detection cavity are arranged on the outside of the covering sleeve.

[0015] The present invention has the following beneficial effects:

[0016] The present invention provides a drying device for gas cylinder production, the core structure of which includes a central gas rod, which is cleverly designed with an expandable outer expansion tube tightly wrapped around its outer side. In the normal state of the device, the outer expansion tube is closely attached to the outer wall of the central gas rod, ensuring that the device can smoothly pass through the mouth of the gas cylinder (or gas tank) and be inserted into its internal cavity.

[0017] Once the device reaches the predetermined position, the external air supply assembly starts working, accurately directing the high-temperature airflow into the internal space of the outer expansion tube. As the high-temperature airflow continues to flow in, the outer expansion tube will gradually expand outward due to the increase in internal air pressure until its outer wall fits tightly against the inner wall of the gas cylinder or maintains a tiny gap.

[0018] The cleverness of this design lies in that it forces the high-temperature airflow to flow only through the narrow gap between the inner wall of the gas cylinder and the outer expansion tube. Such an airflow path not only ensures that the high-temperature airflow can flow evenly and fully along the bottom of the gas cylinder toward the mouth, but also effectively reduces the direct loss of heat and avoids unnecessary energy consumption. In addition, because the airflow flows close to the inner wall of the gas cylinder, it can more efficiently remove the moisture and other impurities remaining inside the gas cylinder, thereby achieving efficient and uniform drying of the inside of the gas cylinder.

[0019] In summary, this drying device for gas cylinder production, through its unique expandable outer expansion cylinder design, not only significantly improves the efficiency and quality of drying, but also effectively reduces energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings, which constitute a part of the specification, illustrate embodiments of the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0021] The present invention may be more clearly understood from the following detailed description with reference to the accompanying drawings, in which:

[0022] Figure 1 This is a schematic diagram of the overall external three-dimensional structure of the drying component of the present invention;

[0023] Figure 2 It is a three-dimensional schematic diagram of the position and structure of the gas tank on the drying assembly of the present invention;

[0024] Figure 3 It is a schematic diagram of the cross-sectional structure of the middle part of the front side of the whole invention;

[0025] Figure 4 for Figure 3 The enlarged structural diagram at E in the middle;

[0026] Figure 5 for Figure 3 The enlarged structural diagram at F in the middle;

[0027] Figure 6 It is a schematic diagram of the installation position of the support plate and the sliver center frame and their connection structure;

[0028] Figure 7 It is a schematic diagram of the three-dimensional cross-sectional structure of the internal support top seat;

[0029] Figure 8 It is a schematic diagram of the cross-section structure of the outer expansion tube;

[0030] Fig. 9 The schematic diagram of the three-dimensional cross-sectional structure of the central gas rod;

[0031] Fig.10 The figure is a simplified schematic diagram of the circuit control of the indicator light and the coil in the present invention.

[0032] In the figure: 1. Mounting base; 2. Cover sleeve; 200. Detection chamber; 201. Damping hole; 3. Reset push spring; 4. Guide strip; 5. Support plate; 6. Limiting magnetic block; 7. Fan blade; 8. Support top seat; 800. Exhaust hole; 9. Detection switch; 10. Indicator light; 11. Gas tank; 12. Center gas rod; 120. Inlet duct; 121. Exhaust duct; 122. Detection channel; 13. Outer expansion tube; 14. Comb center frame; 140. Limit stop rod; 15. Detection piston; 150. Piston push spring; 16. Coil; 17. One-way gas valve; 18. Start switch; 19. Alarm whistle. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] For example, see Figure 1 and Figure 3 It can be seen that the mounting base 1 is fixed at the desired position by bolts, and the central gas rod 12 fastened in the middle is restricted to be arranged vertically. Under normal conditions, the air inlet 120 opened inside the central gas rod 12 is connected to the external air supply assembly, which mainly includes an electric heating assembly for heating the air, an air pump for conveying the air flow, and an air filter assembly for filtering the air flow, so as to ensure that the clean high-temperature air flow can be delivered to the interior of the gas tank 11 through the air inlet 120, thereby Figure 3 It can be seen that when the gas tank 11 needs to be dried, the gas tank 11 is inverted and inserted into the central gas rod 12, and the central gas rod 12 is used to spray high-temperature airflow into the interior of the gas tank 11, thereby achieving drying of the interior of the gas tank 11. In addition, the inverted gas tank 11 is more convenient for the liquid medium inside it to be discharged outwardly, thereby reducing the residual liquid medium inside the gas tank 11.

[0035] Furthermore, from Figure 3 , Figure 4 and Fig. 9 It can be seen that the outer side of the central gas rod 12 is wrapped with an outer expansion tube 13, and the outer expansion tube 13 has a certain elasticity and is tightly attached to the outer side of the central gas rod 12. An exhaust duct 121 is opened on the top of the central gas rod 12. It should be noted that the diameter of the air inlet duct 120 is 3-5 times the diameter of the exhaust duct 121. This can ensure that when the air inlet duct 120 discharges air into the outer expansion tube 13, the air inside the outer expansion tube 13 cannot be quickly discharged from the exhaust duct 121. Specifically, Figure 3It can be seen that the outer expansion tube 13 is wrapped around the outside of the central gas rod 12, and is inserted into the inner cavity of the gas tank 11 from the mouth of the gas tank 11 synchronously with the central gas rod 12. The high-temperature airflow is introduced into the air inlet 120 by using the air supply assembly. The high-temperature airflow through the air inlet 120 will first enter the area between the outside of the central gas rod 12 and the inside of the outer expansion tube 13. A part of the airflow is discharged from the exhaust duct 121 into the inner cavity of the gas tank 11, and flows along the inside of the gas tank 11 to the mouth. With the continuous input of the air supply, the airflow pressure inside the outer expansion tube 13 continues to increase, forcing the outer expansion tube 13 to swell outward, thereby filling the internal space of the gas tank 11 and shortening the gap between the outer expansion tube 13 and the gas tank 11, ensuring that the airflow can only be discharged from the gap, and finally making the high-temperature airflow output by the exhaust duct 121 all move along the inner wall of the gas tank 11 to the mouth, avoiding heat loss and waste, thereby enhancing the drying efficiency.

[0036] On this basis, refer to Figure 1 and Figure 8 It can be seen that a plurality of guide bars 4 arranged in a ring are arranged outside the outer expansion tube 13, and the cross-sectional shape of the guide bars 4 is an isosceles triangle. With the restriction of the guide bars 4, when the outer expansion tube 13 expands outward, the guide bars 4 will contact the inside of the gas tank 11, thereby preventing the outer expansion tube 13 from expanding further outward. The outer expansion tube 13 and the inner side of the gas tank 11 are blocked by the guide bars 4, so that a constant distance is left between the outer expansion tube 13 and the inner side of the gas tank 11, thereby ensuring that the high-temperature airflow can flow out quickly from the distance between the guide bars 4, and avoiding the problem of poor output of high-temperature airflow caused by direct contact between the outer expansion tube 13 and the gas tank 11.

[0037] Example 2 As a supplement to Example 1, please refer to Figure 3-Figure 5 It can be seen that a support top seat 8 is fixedly installed on the top of the central gas rod 12, and the support top seat 8 and the end of the central gas rod 12 can be used to clamp the outer expansion tube 13, so as to achieve a stable installation of the top of the outer expansion tube 13. Figure 7 It can be seen that the support top seat 8 is provided with an exhaust hole 800. When the support top seat 8 is fastened to the end of the central gas rod 12, the exhaust hole 800 can be directly connected to the exhaust duct 121. There are multiple exhaust holes 800, and multiple exhaust holes 800 are provided at the side of the support top seat 8 at equal angles. When the airflow in the exhaust duct 121 is input into the exhaust hole 800, the airflow can be evenly blown to the inner side of the gas tank 11 by the diversion of the exhaust hole 800. Figure 3 and Figure 7 It can be seen that a plurality of balls are arranged on the top of the support seat 8. When the support seat 8 is inserted into the inner cavity of the gas tank 11, the inner wall of the gas tank 11 will eventually hit the balls, forcing a distance to be left between the support seat 8 and the gas tank 11, so that the airflow flows through the gap between the two, which is convenient for drying this part.

[0038] For the fixing and limiting of the bottom of the outer expansion tube 13, refer to Figure 3 , Figure 4 and Fig. 9 It can be seen that the outer side of the central gas rod 12 is covered with a covering sleeve 2 located below the outer expansion tube 13, and the top of the covering sleeve 2 is fixedly connected to the bottom of the outer expansion tube 13. More specifically, a positioning telescopic tube is provided between the bottom of the covering sleeve 2 and the mounting base 1, thereby limiting the covering sleeve 2 to only be able to reciprocate up and down along the central gas rod 12. Specifically, when the outer expansion tube 13 swells outward, it will drag the covering sleeve 2 to move upward, and under the restriction of the positioning telescopic tube, the covering sleeve 2 moves vertically upward along the central gas rod 12; similarly, when the high-temperature airflow is stopped from being supplied to the air inlet 120, the outer expansion tube 13 tends to be pulled downward by the weight of the covering sleeve 2 itself, thereby realizing the reset of the outer expansion tube 13.

[0039] On this basis, combined with Figure 2-Figure 4 and Figure 6 It can be seen that a comb center frame 14 is arranged outside the outer expansion cylinder 13, and the inner side of the comb center frame 14 is positioned and guided by a guide strip 4. A reset spring 3 is arranged between the comb center frame 14 and the covering sleeve 2. Under normal conditions, the comb center frame 14 always tends to move upward under the elastic force of the reset spring 3. Figure 3 As shown, the comb center frame 14 moves to the top of the outer expansion cylinder 13 under normal conditions. In addition, a plurality of limit bars 140 located in the spacing between adjacent guide bars 4 are fixedly installed at the bottom of the comb center frame 14. The limit bars 140 block the outer expansion cylinder 13, forcing the outer expansion cylinder 13 at this position to be unable to expand outward, ensuring that the outer expansion cylinder 13 will only expand in the inner cavity of the gas tank 11, so that the expansion of the outer expansion cylinder 13 can adapt to gas tanks 11 of different depths / diameters.

[0040] In specific application, the gas tank 11 is inverted and pushes the comb center frame 14 downward to compress the reset push spring 3 until the ball on the top of the supporting top seat 8 hits the inner wall of the gas tank 11. In this process, as the gas tank 11 pushes the comb center frame 14 to move downward, the limit stop rod 140 will move downward synchronously with the comb center frame 14, so that the outer expansion tube 13 extending into the gas tank 11 will not be blocked by the limit stop rod 140.

[0041] The high-temperature airflow is input from the air inlet 120 by using the air supply assembly, so that the inside of the outer expansion tube 13 expands outward due to the increase of airflow pressure, thereby filling the inside of the gas tank 11 until the guide bar 4 reaches the inner side of the gas tank 11. At this time, when the outer expansion tube 13 expands outward, it will drag the covering sleeve 2 further upward through the bottom. At the same time, part of the airflow is transported from the exhaust duct 121 to the inner cavity of the gas tank 11, and the high-temperature airflow flows along the inner wall of the gas tank 11, thereby completing the drying of the inside of the gas tank 11.

[0042] When the drying is completed, the air supply to the air inlet 120 is stopped, and then, under the push of the elastic force of the return spring 3, the cover sleeve 2 drags the outer expansion cylinder 13 downward until the outer expansion cylinder 13 returns to normal. When the gas tank 11 is taken out, the return spring 3 pushes the comb center frame 14 to move upward synchronously until the comb center frame 14 moves to the outer top of the outer expansion cylinder 13.

[0043] Example 3 is a further improvement on Example 2. Figure 3 and Fig.10 It can be seen that a detection switch 9 is fixedly mounted on the surface of the mounting base 1, and an indicator light 10 connected in series with the detection switch 9 is fixedly mounted on the mounting base 1. In actual arrangement, the indicator light 10 is connected to the positive pole of the power supply through a protective resistor, and the negative pole of the power supply is connected to the detection switch 9. Under normal conditions, the detection switch 9 is in an off state. When the covering sleeve 2 pulls the outer expansion tube 13 to return to normal, the bottom of the covering sleeve 2 will suppress the detection switch 9, thereby turning on the detection switch 9, and the indicator light 10 is always on. As can be known from the content of Example 2, when the air supply assembly inflates the air inlet 120, the outer expansion tube 13 will swell outward and expand in the inner cavity of the gas tank 11. At this time, the covering sleeve 2 has a tendency to move upward and away from the detection switch 9. If the sealing inside the outer expansion tube 13 is good, the content described in the second implementation can be met. When the covering sleeve 2 is separated from the detection switch 9, the indicator light 10 is powered off and no longer lights up. Similarly, if there is a gas leak inside the outer expansion tube 13, the airflow output from the air inlet 120 will be directly discharged from the leaking position, the outer expansion tube 13 will not swell outward, the covering sleeve 2 will not move upward, and the indicator light 10 will be in a constant light state. Based on this, the operator can clearly understand that when the gas supply component is working, if the indicator light 10 is always on, it means that there is a gas leak in the outer expansion tube 13 and maintenance is required.

[0044] Moreover, combined with Figure 3 and Figure 5It can be seen that a detection path 122 communicating with the air inlet 120 is provided on the outer side of the central gas rod 12, and a detection cavity 200 communicating with the detection path 122 is correspondingly provided in the covering sleeve 2, a detection piston 15 is movably installed in the detection cavity 200, and a piston push spring 150 is connected between the detection piston 15 and the covering sleeve 2. Under the push of the elastic force of the piston push spring 150, the detection piston 15 always has a tendency to move toward the detection path 122, and an alarm whistle 19 communicating with the detection cavity 200 is fixedly installed on the covering sleeve 2. Under normal circumstances, the side of the detection piston 15 blocks the alarm whistle 19. When the airflow in the detection path 122 increases, it will push the detection piston 15 to have a tendency to compress the piston push spring 150, so that the airflow is discharged from the alarm whistle 19, and then the alarm whistle 19 makes a sound. In actual application, if the outer expansion tube 13 is unable to move upward due to leakage, the detection piston 15 is always located on one side of the detection channel 122. As the air supply assembly fills the air inlet channel 120 with air, the air flow pushes the detection piston 15 and compresses the piston push spring 150 until the detection piston 15 passes the alarm whistle 19. The air flow in the detection channel 122 is discharged from the alarm whistle 19, thereby making a sound to warn the operator that the outer expansion tube 13 has not expanded normally and needs to be repaired.

[0045] From the above, it can be seen that by using the means of the third embodiment, when leakage occurs in the outer expansion tube 13, the operator can be warned by a combination of sound and light that there is a problem with the device and maintenance is required.

[0046] Example 4 is a supplement to Example 3. Please refer to Figure 1 , Figure 2 and Figure 6 It can be seen that the outer side of the comb center frame 14 is provided with a fan blade 7 connected by a bearing, and a support plate 5 is installed on the outer side of the fan blade 7, and a limit magnetic block 6 is installed in the support plate 5. Figure 4 As shown, when the gas tank 11 is inverted, since the support plate 5 is located on the outside of the comb center frame 14, the area supporting the gas tank 11 can be increased to accommodate the fixation of gas tanks 11 of different calibers. When the mouth of the gas tank 11 is attached to the support plate 5, the magnetic attraction of the limited magnetic block 6 to the mouth of the gas tank 11 makes the gas tank 11 more stable when inverted. At the same time, when the mouth of the inverted gas tank 11 is exhausted outward, the airflow will pass through the fan blades 7 between the support plate 5 and the comb center frame 14. The fan blades 7 are blown by the airflow and tend to drive the support plate 5 to rotate, and finally drive the gas tank 11 to rotate. This method can change the contact position between the guide strip 4 and the gas tank 11 to avoid the formation of drying dead angles.

[0047] However, in actual application, the guide bar 4 will contact the inner side of the gas tank 11, which will increase the resistance to the rotation of the gas tank 11. It may happen that the strength of the fan blade 7 driving the support plate 5 to move is not enough to rotate the gas tank 11. In order to overcome such problems, based on the above content, combined with Figure 3 and Figure 5 It can be clearly seen that a start switch 18 is fixedly mounted on the cover sleeve 2 and located on one side of the detection piston 15. A coil 16 is fixedly mounted on the inner side of the cover sleeve 2. When the detection piston 15 contacts the start switch 18, the coil 16 is energized and generates magnetism to attract the detection piston 15, so that the detection piston 15 has sufficient strength to move toward the detection track 122. Fig.10 It can be seen that the positive electrode of the power supply is connected to the coil 16 after passing through the protective resistor, the coil 16 is connected to the start switch 18, and the start switch 18 is connected to the normally closed position of the detection switch 9. Figure 5 As shown, when the outer expansion tube 13 expands outward, it will drag the covering sleeve 2 upward, thereby causing the detection piston 15 to move upward and leave the detection path 122. Since the outer side of the central gas rod 12 is provided with a stepped portion, the upward detection chamber 200 will eventually communicate with the inner chamber of the outer expansion tube 13. When the airflow in the inner chamber of the outer expansion tube 13 is input into the detection chamber 200, it will first push the detection piston 15 to move, and finally be discharged from the alarm whistle 19. At this time, the alarm whistle 19 will discharge the airflow inside the outer expansion tube 13, so that the outer expansion tube 13 drives the guide bar 4 to reduce the pressure on the inside of the gas tank 11, thereby reducing the movement resistance of the gas tank 11. In addition, in this embodiment, the start switch 18 is a delayed disconnection switch, so that the start switch 18 can be quickly connected during operation, and when disconnected, it will automatically cut off the circuit connection after extending the set time.

[0048] In order to prevent the detection piston 15 from moving too fast in the detection chamber 200, Figure 5 It can be seen that a damping hole 201 communicating with the detection chamber 200 is provided on the outside of the covering sleeve 2, and the damping hole 201 can be used to slowly discharge the airflow in the detection chamber 200 outward; a one-way air valve 17 located above the damping hole 201 is fixedly installed on the side of the covering sleeve 2, and the airflow can be quickly replenished into the detection chamber 200 through the one-way air valve 17, so that the resistance of the detection piston 15 is reduced when it moves away from the piston push spring 150.

[0049] During the specific working process, the gas tank 11 is placed on the support plate 5 in an inverted manner, and the end surface of the mouth of the gas tank 11 is fixed by the magnetic attraction of the limit magnet 6. As the gas tank 11 continues to press the support plate 5 downward, the reset spring 3 is compressed, and finally, the ball on the top of the support top seat 8 reaches the inside of the gas tank 11. As the reset spring 3 pushes the covering sleeve 2 downward to the bottom limit, the bottom of the covering sleeve 2 will press the detection switch 9, such as Fig.10 As shown, when the detection switch 9 is pressed, the indicator light 10 will be connected to the power supply, so that the indicator light 10 is always on.

[0050] The air supply assembly is used to introduce high-temperature air into the air inlet 120. During this process, if the outer expansion tube 13 leaks, the air introduced into the air inlet 120 will be discharged from the leaking part, so that the outer expansion tube 13 will not expand outward. Figure 5 It can be seen that when the airflow in the air inlet 120 enters the detection chamber 200 through the detection channel 122, there is a tendency to push the detection piston 15 to the left to compress the piston push spring 150. In addition, the detection piston 15 squeezes the air in the detection chamber 200 on the left side, so that the air in the detection chamber 200 can only be slowly discharged outward from the damping hole 201. Since the outer expansion tube 13 has a leakage problem at this time, the outer expansion tube 13 will not pull the covering sleeve 2 upward due to expansion, and the detection chamber 200 and the detection channel 122 are continuously connected. As the detection piston 15 continues to move to the left until the detection piston 15 passes over the alarm whistle 19, the airflow entering the detection chamber 200 will be continuously released from the alarm whistle 19, and the alarm whistle 19 will emit a continuous sound. The operator can judge that there is a leakage in the outer expansion tube 13 based on the continuous sound of the alarm whistle 19 and the constant lighting of the indicator light 10. Figure 5 and Fig.10 As shown, even if the detection piston 15 moves to the left and contacts the start switch 18, since the detection switch 9 connects the indicator light 10 at this time, the turned-on start switch 18 still does not make the coil 16 work.

[0051] If the sealing performance of the outer expansion tube 13 is good, as described in the above embodiment, the airflow entering the inner part of the outer expansion tube 13 will cause it to swell outward until the guide strip 4 is attached to the inner side of the gas tank 11, and the airflow inside the outer expansion tube 13 enters the gas tank 11 from the exhaust passage 121, and is discharged from the mouth after passing through the inner wall of the gas tank 11. In addition, the airflow discharged from the mouth of the gas tank 11 will act on the fan blades 7, forcing the fan blades 7 to have a tendency to drive the support plate 5 to rotate.

[0052] As the outer expansion tube 13 expands outward, it will drag the covering sleeve 2 upward and release the pressure on the detection switch 9. At this time, the detection switch 9 is connected to the start switch 18. Figure 5It can be seen that the upward covering sleeve 2 will communicate with the interior of the outer expansion tube 13 after passing the detection path 122. At this time, the airflow inside the outer expansion tube 13 will be input into the detection chamber 200, and push the detection piston 15 to the left to compress the piston push spring 150. Similarly, when the detection piston 15 passes the alarm whistle 19, the airflow inside the outer expansion tube 13 is released to the outside through the alarm whistle 19, so that the airflow pressure inside the outer expansion tube 13 is relatively reduced, thereby reducing the pressure of the guide bar 4 on the inside of the gas tank 11, forcing the contact pressure between the guide bar 4 and the gas tank 11 to decrease, and reducing the movement resistance, so that it is convenient for the support plate 5 to drive the gas tank 11 to rotate, avoiding the problem of drying dead corners inside the gas tank 11. At the same time, after the left-moving detection piston 15 passes the alarm whistle 19, there is still a certain distance between the detection piston 15 and the starting switch 18. As time goes by, the detection piston 15 will eventually be pressed on the starting switch 18. Combined with Fig.10 As shown, when the start switch 18 is turned on, the coil 16 is forced to be connected to the power supply, and the coil 16 generates magnetism to attract the detection piston 15. The detection piston 15 moves to the right under the influence of the magnetic force, and finally passes the alarm whistle 19 and blocks it. After the delay time set by the start switch 18 ends, the start switch 18 is disconnected again.

[0053] When the detection piston 15 blocks the alarm whistle 19, the airflow inside the outer expansion tube 13 cannot be discharged from the alarm whistle 19 again. Combined with the fact that the airflow input in the air inlet 120 is greater than the airflow discharged from the exhaust duct 121, the outer expansion tube 13 pushes the guide bar 4 to further contact the inside of the gas tank 11, increasing the contact resistance between the gas tank 11 and the guide bar 4. Finally, as the detection piston 15 is affected by the airflow pressure inside the outer expansion tube 13 and moves to the left again, the alarm whistle 19 will eventually open again, which will, on the one hand, realize the periodic rotation of the gas tank 11, and on the other hand, periodic pressure relief is performed through the alarm whistle 19 to avoid the problem of the outer expansion tube 13 bursting and leaking due to excessive expansion.

Claims

1. A drying device for gas cylinder production, characterized in that: include: A mounting base (1) is provided with a central gas rod (12) in the middle thereof, and an air inlet passage (120) and an air outlet passage (121) are provided in the central gas rod (12); The gas tank (11) is inverted and inserted outside the central gas rod (12); An outer expansion tube (13) wrapped around the outer side of the central gas rod (12); The increase in the air flow pressure inside the outer expansion tube (13) causes the outer expansion tube (13) to expand outward, thereby filling the internal space of the gas tank (11) and shortening the gap between the outer expansion tube (13) and the gas tank (11), so that the air flow can only flow through the gap; A support top seat (8) is fixedly mounted on the top of the central gas rod (12), an exhaust hole (800) communicating with the exhaust passage (121) is provided in the support top seat (8), a covering sleeve (2) located below the outer expansion tube (13) is sleeved on the outer side of the central gas rod (12), and a top end of the covering sleeve (2) and a bottom end of the outer expansion tube (13) are fixedly connected; A combing strip center frame (14) is arranged outside the outer expansion cylinder (13), a reset push spring (3) is arranged between the combing strip center frame (14) and the covering sleeve (2), and a limit stop rod (140) is fixedly installed at the bottom of the combing strip center frame (14).

2. The drying device for gas cylinder production according to claim 1, characterized in that: The diameter of the air inlet passage (120) is 3-5 times the diameter of the exhaust passage (121).

3. The drying device for gas cylinder production according to claim 1, characterized in that: A guide strip (4) is arranged on the outside of the outer expansion tube (13), and the cross-section of the guide strip (4) is in the shape of an isosceles triangle.

4. The drying device for gas cylinder production according to claim 1, characterized in that: A detection switch (9) is fixedly mounted on the surface of the mounting base (1), and an indicator light (10) connected in series with the detection switch (9) is fixedly mounted on the mounting base (1), the indicator light (10) is connected to the positive electrode of the power supply through a protective resistor, and the negative electrode of the power supply is connected to the detection switch (9).

5. The drying device for gas cylinder production according to any one of claims 1 or 4, characterized in that: A detection channel (122) communicating with the air inlet channel (120) is provided on the outside of the central gas rod (12); a detection chamber (200) communicating with the detection channel (122) is provided in the covering sleeve (2); a detection piston (15) is movably installed in the detection chamber (200); a piston push spring (150) is connected between the detection piston (15) and the covering sleeve (2); and an alarm whistle (19) communicating with the detection chamber (200) is fixedly installed on the covering sleeve (2).

6. The drying device for gas cylinder production according to claim 5, characterized in that: A fan blade (7) connected via a bearing is disposed on the outer side of the comb center frame (14), a support disk (5) is mounted on the outer side of the fan blade (7), and a limit magnetic block (6) is mounted in the support disk (5).

7. The drying device for gas cylinder production according to claim 6, characterized in that: A start switch (18) located on one side of the detection piston (15) is fixedly mounted on the covering sleeve (2), a coil (16) is fixedly mounted on the inner side of the covering sleeve (2), the positive electrode of the power supply is connected to the coil (16) through a protective resistor, the coil (16) and the start switch (18) are connected, the start switch (18) is connected to the normally closed position of the detection switch (9), and the start switch (18) is a delayed disconnection switch.

8. The drying device for gas cylinder production according to claim 7, characterized in that: A damping hole (201) and a one-way air valve (17) communicating with the detection cavity (200) are arranged on the outside of the covering sleeve (2).

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